Document text
Regency Land Mobile, Inc.
SERVICE MANUAL
VHF FM
MOBILE TRANSCEIVER
ty
Reqency Product Group % Wilson Product Group
WH6016
4505 W. HACIENDA AVE. 0300-4399-000 PRINTED IN U.S.A.
LAS VEGAS, NEVADA 89118 5/85
TABLE OF CONTENTS
PAGE
SECTION 1 - DESCRIPTION
1-1 Product Introduction te
1-2 System Considerations 1
1-3 Specifications 3
1-4 Equipment Supplied 6
1-5 Equipment Not Supplied 7
1-6 Operation 7
SECTION 2 -—- SERVICE INFORMATION
2-1 Installation dpa)
2-2 Alignment 16
2-2-1 Transmitter Alignment 16
2-2-2 Receiver Alignment 21
2-2-3 Programming the Radio 27
2-3 Initial Tests 34
2-4 Circuit Descriptions 34
2-5 Troubleshooting 43
2-6 Diagrams, Voltage Data, and Schematics 51
2-6-1 Main Schematic - Sheet 1 Si
2-6-2 Main Schematic - Sheet 2 53
2-6-3 Control Board Parts Placement 55
2-6-4 Main Board Parts Placement - Top 56
2-6-5 Main Board Parts Overlay 57
2-6-6 Main Board Parts Placement - Bottom 58
2-6-7 VCO Schematic 59
2-6-8 VCO Board Parts Placement/Parts Overlay 60
2-6-9 PA Schematic 61
2-6-10 PA Board Parts Placement/Parts Overlay 62
2-6-ll Filter Board Schematic 63
2-6-12 Filter Board Parts Placement/Parts Overlay 64
2-6-13 Interconnection Diagram 65
Copyright 1985 by Regency Land Mobile, Incorporated.
Duplication prohibited.
0300-4399-000 1
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Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
N. 3 =. PARTS *GISts
VCO Board
Control Board
Filter Board
PA Board
Main Board, Receiver
Main Board, Transmitter
Freq. Sens Parts, A Model
Freq. Sens Parts, C Model
Parts Variable 16-channel (All Models)
Exploded View
Mechanical Parts
N 4 - SERVICE BULLETINS
LIST OF ILLUSTRATIONS
1 - Equipment Supplied
Section l
2 - Control Panel
Section l
3 - Microphone Matching Network
Section 2
4 - Transmitter Test Interconnection Diagram
Section 2
5 - Transmitter Tuning Points
Section 2
6 - Receiver Test Interconnection Diagram
Section 2
7 - Receiver Test and Adjustment Points
Section 2
8 - Block Diagram
Section 2
9 - Seven-Segment Display Codes
Section 2
0300-4399-000 Le
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1-1 PRODUCT INTRODUCTION
The RH/WH series high power radios are available in either
10- or 16-channel versions and designed for use in the VHF
Land Mobile Communications Band. BR, By and C= models” fare
available for each radio. The "A" model is designed for
Operation in the 134 to 150 MHz frequency band. The,6"B"
model is designed for use in the 150 to 162 MHz frequency
band. The "C" model operates in a 162 to 174 MHz frequency
band. All radios are designed to work in systems requiring
30 kHz channel spacing.
These transceivers are programmable by the service
technician. Thus, there is no need to order crystals or
PROMS from the factory. Each radio comes equipped with an
electrically alterable read-only memory (EAROM). This device
Stores the radio's characteristics as programmed via the
radio's keyboard.
A CTCSS encoder and decoder is built in as standard
equipment. Thirty-seven EIA tone frequencies are available
for use on each channel and, on the 16-channel version only,
a different tone frequency can be selected for encode and
decode on the same channel. A mixing of tone and non-tone
channels may be programmed into the radio along with encode
only or decode only channels (the decode only channels
require that the transmitter be disabled).
The radio is capable of being programmed for operation in
Simplex and/or half-duplex systems. Simplex and half-duplex
channels may be programmed in one radio.
Active channel and priority channel scanning features are
also standard equipment. These features are entirely user
programmable from the front panel. The user, under normal
Operation, simply enters the channels that are to be scanned
and selects the desired scan function from the keyboard.
The keyboard is used in radio programming and during normal
operation. The keyboard is back lit when the day/night
Switch is in the night position.
1-2 SYSTEM CONSIDERATIONS
These radios have the flexibility to work in various
systems. However, they are recommended for use in CTCSS,
non-CTCSS, simplex, or half-duplex systems only.
0300-4399-000 Le SECTION l
While no internally installed option circuits have been
tested with these units, contact the Customer Service
Department for specific advice if such installations are
desired.
Accessories and options available for these radios are:
Wilson Regency
1. 5-Watt Horn Speaker MHS5 MA- 48
2. Handset and Cradle CHl
3. Hand Microphone MHM2 MA- 83
4. DC Power Cord, 15A MA-168
5. External Speaker TMES MA-108A
6. Handset w/Switch THH2 MA-126
7. Mounting Bracket, Heavy Duty MA=-375
8. 12A Alternator Whine Filter MA-365B
9. Split Bar Desk Mic, w/Compr. Amp SBM3 MA-370
10. 12A 13 VDC Power Supply (117 VAC) P1412
ll. DC Power Cord for Power Supply MA~-322
Although the transceivers have been tested for performance
with excessive AC ripple on the power supply lines, all
Situations can not be anticipated. There may be some
installations that introduce far more ripple than the radio
can handle. In these installations the Alternator Whine
Filter was designed to cut out the ripple to the radio.
Check with the installation section to review the proper
installation practices.
0300-4399-000 Pie SECTION: - 1
SPECIFICATIONS
CHANNELS
CHANNEL SPACING
FREQUENCY RANGE
BAND A
BAND B
BAND C
SIZE
WEIGHT
OPERATING TEMPERATURE
STORAGE TEMPERATURE
OPERATING DUTY CYCLE
ANTENNA IMPEDANCE
SUPPLY VOLTAGE
CURRENT DRAIN
Receiver Squelched
Receiver Maximum Audio
Transmitting
(60W output)
(Max. power out or
wide freq. spread)
‘General
1 - 10 dealer
1 -—- 16 dealer
programmable or
programmable
30 kHz (5 kHz min resolution)
134 - 150 MHz
150 — 162 MHz
162 - 174 MHz
6nb/2° xpsel/4ixmlk 1/4 inches
1695 "%e893 %129-'36. com
6 ibs wee2yozs 3 b27Sako (mass)
~22° to 140°F, -30° to +60°C
—59°R to eh940Re or 502Guto 90°C
*Add 150mA for operation below 0°C (32°F)
0300-4399-000
20%, 1 min. TX, 4 min. RX
50 ohm
B36 eVDC Srl 5%
500 mA Max*
bol: | A*
12A
15A Max
-3- SECTION
uf
1-3 SPECIFICATIONS (continued)
Receiver
RECEIVER SENSITIVITY
12 dB SINAD -35 uV (-116 dBm)
20 dB Quieting 5 uv’ (-113: 4GBm)
SQUELCH SENSITIVITY
Threshold Squelch 2 uV (-lr2)dBm)
Tight Squelch 1 uV (-107 dBm)
CTCSS SENSITIVITY -32 uvV(-115.9dBm) w/tone dev.
of 750 Hz
ADJ CHANNEL DESENS 70 dB
12 “dB
OPERATING BANDWIDTH 3.0 MHz (1.5 MHz)
IMAGE REJECTION 70 dB
SPURIOUS REJECTION 85 dB
IM 12 dB SINAD 70 dB
MODULATION ACCEPTANCE nee) KHZ
BANDWIDTH
FREQUENCY STAB/TEMP +.0005%
FREQUENCY STAB/VOLT +.0001%
AUDIO RESPONSE per EIA RS204C, Part 9
AUDIO POWER OUT 5W @ 10% Dist
SQUELCH BLOCKING per EIA RS204C, Part 18
RECEIVER ATTACK TIME 150 mS Max
RECEIVER SQUELCH 250 mS Max
CLOSING TIME (EIA)
HUM & NOISE RATIO, 45 dB Min
UNS QUELCHED
HUM & NOISE RATIO, 60 dB Min
SQUELCHED
UNDESIRED RADIATED Per FCC Part 15, Subpert ¢ &
0300-4399-000 =i SECTION: “2
1-3 SPECIFICATIONS (continued)
Transmitter
POWER OUTPUT 60W Min
DC POWER INTO FINAL 150 Max
OUTPUT FREQ STAB/TEMP +.0005%
OUTPUT FREQ STAB/VOLT +.0001%
SPURIOUS & HARMONICS, -62 dBc
CONDUCTED
SPURIOUS & HARMONICS, Meets FCC requirements for
RADIATED Panto 2, :21, 90, and_95
OPERATING BANDWIDTH 3 MHz (+1.5 MHz)
EMISSION DESIGNATOR L6F3
MODULATION Factory set at FCC max of +5 kHz
AUDIO FREQ DISTORTION 3%
F.M. HUM & NOISE 35 dB
A.M. HUM & NOISE Per EIA RS152B Part 16
AUDIO FREQ RESPONSE Per EIA RST52B Part 7
TRANSMITTER ATTACK TIME Per EIA RS152B Part 18
SIDEBAND SPECTRUM Per EIA RS152B Part 17
NOTE: Specifications subject to change without notice.
0300-4399-000 Oe SECTION,
0300-4399-000
EQUIPMENT SUPPLIED
Radio
Hand Microphone
Hardware Kit No. 2
Mounting Bracket
Two (2) Black Anti-Rotation Washers
Two (2) Steel Washers
Two (2) Lock Washers
Two (2) Mounting Bolts
DC Power Cord w/15A Fuse
External Speaker
FIGURE 1 - EQUIPMENT SUPPLIED
SECTION tL
&
1-5 EQUIPMENT NOT SUPPLIED
1. Antenna
2. Antenna Feed Cable
Si eelsmvesupply
1-6 OPERATION
STATUS LED CHANNEL DISPLAY
MONITOR : a
SWITCH a BACKLIGHTED
KEYBOARO
VOLUME/ON-OFF |
CONTROL
NIGHT/DAY SWITCH
FIGURE 2
(Refer to Figure 2 for the following descriptions.)
VOLUME CONTROL/ON-OFF SWITCH
This control varies the speaker volume. Clockwise rotation
turns the radio on and increases the volume. The 10-channel
radio always returns to the programmed priority Channel in
MANUAL mode when it is turned on. The 16-channel radio,
however, remembers the state it was in when it was turned off
and returns to that same state when reactivated (i.e. same
channel and/or scan or priority modes) .
SQUELCH CONTROL
The squelch control is used to eliminate the speaker noise when
not receiving a transmission. Move the control clockwise until
noise is heard (if in the SCAN mode the receiver will stop
scanning). Then move the control counterclockwise until the
speaker noise is squelched (if in the SCAN mode the receiver
will start to scan approximately two seconds after the speaker
squelches).
MONITOR SWITCH
Placing this switch in the "MON" position allows the user to
monitor the channel when the CTCSS decoder is operating.
0300-4399-000 Sidi SECTION l
NIGHT/DAY SWITCH
Placing this switch in the "DAY" position places the display
lights at maximum luminosity and does not light the keyboard.
In the "NIGHT" position the display lights' luminosity is
decreased and the keyboard is illuminated.
STATUS LEDS
There are four status LEDS located to the left of the channel
display.
TX - When lit indicates that the transmitter is activated.
This is accomplished by removing the microphone from
the hang-up clip (off-hook condition) and pressing the
push-to-talk switch on the microphone.
SCAN - When lit indicates that the radio is in the SCAN mode.
Pressing the SCAN button on the keyboard puts the radio
in the SCAN mode.
MSG - When lit indicates that a message has been received.
The radio's CTCSS decoder must be activated in order
for this GEO) “Cec function. If a message has- been
received, going off hook or changing the channel will
reset the LED to its OFF state.
PRIOR - When lit indicates that the radio's priority function
has been selected. Pressing the PRIOR button on the
keypad will activate and deactivate the PRIORITY
function.
CHANNEL DISPLAY
Displays the current channel the radio is operating on. The
channels are selected by pressing the appropriate button(s) on
the keyboard.
A. Receiver Operation
1. Receiver Operation - 10-Channel Models
There are two receiver operating modes, manual and _ scan.
The radio powers-up in the manual mode on the priority channel.
Manual Mode:
The manual mode is entered by pressing the MANUAL button or any
of the channel buttons (1-10) on the keyboard. The scan LED is
extinguished. The radio operates on the displayed channel.
0300-4399-000 =o= SECTION £ 1
Scan Mode:
The scan mode allows the radio to monitor activity on more than
one channel. Pressing the SCAN button on the keyboard will
Place the radio in the scan mode. The scan LED will be
illuminated. The radio will scan the channels placed into the
scan list only if the microphone is on-hook (mic hang-up button
connected to chassis ground) and the squelch control adjusted
to squelch the radio (without a carrier present). With the
radio properly set up to scan, the scan LED will blink and the
display will turn off while the radio scans. When there is
activity on one of the channels in the scan list, the scan LED
will be held on and the active channel will be displayed. The
radio goes to the priority channel whenever the microphone is
Lifted offi -hook. When the microphone is placed back in the
hang-up clip, the radio resumes scanning.
Programming the Scan List
Programming the scan list is a user operation. That is, ~ the
radio is not to be in the program mode for this operation.
Entering a channel into the scan list is accomplished by
pressing the channel to be entered and the ENTER button on the
keyboard. When the ENTER button is pressed, the display will
momentarily blink off and then will display the channel just
entered in the scan list.
To delete a channel from the scan list, press the channel to be
deleted and then press the DELETE button on the keyboard. The
channel display will blink off and after the channel has been
deleted from the list, the next channel in the List will be
displayed.
If deleting consecutive channels in the scan Vasterite LS not
necessary to enter all the channels. The channels can be
deleted by pressing the first channel number of the sequence,
then press the DELETE button as many timesstasay there are
channels to delete. For example, to delete channels 3, 4, and
5 in the scan list, select channel 3 and press_ the DELETE
button three times.
When all the channels have been deleted from the scan 1a site aa
flashing "C" will be displayed. The scanner will not operate
without any channels in the scan list.
To review the channels in the scan list, press the MANUAL
button on the keyboard. Each time the MANUAL button is pressed
the next higher channel in the scan List is displayed.
0300-4399-000 o> SECTION) . 1
The Priority Function
The priority function allows the operator to listen to one
channel (non-priority channel) and not miss an important
message on another, more important, channel (priority channel).
Pressing the PRIOR button on the keyboard will enable or
disable the priority function. When the priority LED is lit,
the priority function is enabled.
Whenever selecting the priority function (pressing the PRIOR
button resulting in illumination of the priority LED) the radio
will go into the manual mode and jump to the priority channel.
When disabling the priority function (pressing the PRIOR button
resulting with the priority LED turning off) the radio will
stay in the mode in which it was operating.
To change the priority channel, select the channel to become
the priority channel and press the PRO PRIOR and ENTER buttons
on the keyboard (in that order).
Priority-Manual Operation
The squelch control must be set, squelching the radio, to allow
the priority function to operate. When the radio is listening
on a non-priority channel, the radio will look at the priority
channel occasionally. If the priority channel is active, the
radio will stop on that channel and monitor the transmission.
The radio does this regardless of what is happening on _ the
non-priority channel. When the priority channel becomes
inactive and the microphone was not lifted from the hang-up
clip;,.,the, radio, wall return, to 1isten oO 7 the non-priority
channel it was on before. But if the microphone is lifted, the
radio will remain on the priority channel, forgetting the
non-priority channel it was on previously.
Priority-ocan, Operation
Operation of the radio with the priority function selected in
the scan mode is similar to that of the non-priority scan mode
with one exception. If the radio stops scanning ("locks up")
on a non-priority channel, the radio will occasionally look at
the priority channel. Tf there=is° activity on the priority
channel, the radio will stay on the priority channel; if not,
the radio will go back to the channel that was interrupted.
Lifting the microphone off-hook will cause the radio to stop
scanning and go to the priority channel. Upon’’ placing the
microphone on-hook, the radio will resume scanning.
If a call comes in on a non-priority channel, however, and the
microphone is lifted off-hook, causing the radio to jump to the
priority channel, the message channel is lost. To prevent this
from occurring, the user must note the channel the message was
On and press the channel button on the keyboard (taking the
radio out of the scan mode) and then pick up the microphone.
0300-4399-000 wal te SECTION 1
2. Receiver Operation - 16-Channel Models
The operation of this radio is similar to that of the
10-channel radio. There are two receiver modes, manual and
scan. The 16-channel radio, however, powers up to the state
the radio was in before the power was turned off. The radio
even remembers the state it was in after the power has been
removed.
Manual Mode:
The manual mode is the same as the 10-channel radio with the
exception of selecting channels 11 through 16. Whenever the
"1" “button is pressed, the display will flash a "1" in the
tens position. If a second number is not entered within
three seconds, the radio will revert to channel l. Te,
however, a second button between 1 and 6 is pressed, the
radio will select that channel 11 through 16, respectively.
Scan Mode:
The scan mode for the 16-channel radio is similar to that of
the’ 10-channel radio. The same conditions are required to
scan, that is, adjust the squelch control to squelch the
radio, place the microphone on-hook, and press the SCAN
button on the keyboard.
There are several differences in the 16-channel's scanner
operation. If the microphone is lifted off-hook while the
unit is scanning (no channel displayed and SCAN light
blinking), the unit will jump to the priority channel and
remain there until the mic is hung-up. However, when
receiving a call on a non-priority channel, the radio will
stay on that channel if the mic is lifted off-hook before the
unit begins to scan again. When the mic is returned to its
hook, the radio will resume scanning. This allows the user
to answer a call on a non-priority channel without changing
to that channel in manual mode and then resetting to scan
mode when the conversation is over.
The time between the end of a received transmission and the
resumption of scanning (scan delay time) can be adjusted to
0.68, 1.3, or 2 seconds. This selection is done during radio
programming (see Section 2-2-3).
Programming the Scan List
Entering, deleting, and reviewing the channels in the scan
list are done in the same way as the 10-channel radio.
Pressing ENTER enters the channel in the list; pressing
DELETE deletes a channel from the list, and pressing the
MANUAL button reviews the channels in the scan list.
0300-4399-000 oa SECTION, 1
The Priority Function
The priority function is the same as the 10-channel radio's
priority: .function: Press the PRIOR button to activate the
priority function; press the PRIOR button again to deactivate
LE. The 16-channel radio will not jump to the priority
channel when activating the priority function. Any time the
PRIOR button is pressed and held, the radio will display the
Priority channel. Any time the microphone is lifted off-hook
with the priority function activated, the radio will go to
the priority channel and stay there until the mic is replaced
on-hook.
Priority-Manual Operation
The priority-manual operation of the l6-channel radio is
similar to the 10-channel radio except for the following.
The 1l6-channel radio will always return to the selected
non-priority channel after monitoring a transmission on the
priority channel even if the microphone was lifted off-hook.
Priority-Scan Operation
The priority-scan operation of the 16-channel radio is
similar to the 10-channel radio except for the following.
When a radio locks-up on a non-priority channel, priority
channel sampling will then begin. If a transmission is
detected, the receiver will stay on the priority channel
UNntAR Mate Sy Over. Then, even if the microphone was’ taken
off-hook, the radio. willg first; switeh back to the
non-priority channel and check for activity there before
resuming the scan.
B. Transmitter Operation
To transmit, select the desired channel (if you are in
PRIORITY mode, the radio will automatically switch to _ the
priority channel when the microphone is lifted), lift the
microphone off-hook, monitor to be sure the channel is not in
use, key the transmitter, and speak into the microphone. To
key the transmitter, press the push-to-talk (PTT) button on
the Side of the microphone. Two-way conversation is
accomplished by the push-to-talk, release-to-listen operation
of the PTT button on the microphone. When transmitting a
message, hold the microphone about two inches from your mouth
and speak loudly and distinctly. Downot. shout, pranto:dsthe
microphone as this will cause distortion.
0300-4399-000 == SECTION; 1
Note that the PTT button on the microphone is not enabled
when the microphone is on-hook (microphone hang-up button
connected to chassis ground). Also, while transmitting, the
keyboard is disabled so accidental pressing of a button on
the keyboard will not interrupt the transmission.
The l6-channel radio has some _ standard features not
present in the 10-channel radio. One is a time-out timer.
The timer is to prevent accidental PIT operation from
blocking a channel. The available time-outs are 30, 60, and
120 seconds. When programmed (see Section 2-2-3), the
time-out function is enabled on all channels.
Another feature available on the 16-channel radio is that the
transmit CTCSS tone frequency can be different. than, “the
receiver decoder tone frequency on the same channel.
0300-4399-000 -13- SECTION, +
SPEC Wa. OUuNreaZ Le-wesith PRev-eLC SE Se INE COLA MSA Ir AO N
2-1 INSTALLATION
WARNING: THIS UNIT IS DESIGNED TO OPERATE IN
VEHICLES WHICH HAVE A 12 VDC NEGATIVE
GROUND POWER SUPPLY.
Locate the radio in a convenient and accessible area in the
vehicle's. cab. Secure the mounting bracket and attach the
radio. Mount the microphone hang-up clip. ii eche = radio
being installed has CTCSS programmed in it, then the
microphone hang-up clip must be grounded to the vehicle's
chassis. Connect the microphone.
Route the power cable supplied to the vehicle's battery.
Connect the positive (red) lead to the positive (+) terminal
on the battery; connect the negative (black) lead to the
negative (-) terminal. Be sure to locate the wires away from
any noise sources, such as the generator or alternator,
ignition wires, etc. If there is not enough wire, splice
additional wire to connect the leads to the battery. If the
battery is located in an extremely remote Tecation, find” a
buss connection that can handle a 15 amp current draw. Check
this buss connection for ripple on the line. The ripple must
be less than 200 mVrms, otherwise an alternator whine filter
must be used (or find a better terminal block connection).
Mount the antenna and route the antenna feed cable to the
radio. Connect the antenna and make adjustments for best
radio to antenna match.
0300-4399-000 ao SECTION 2
2-2 ALIGNMENT
2-2-1 Transmitter Alignment
A. Equipment Required
1. VHF Transceiver
2. DC Voltmeter
3. DC Power Supply w/Ammeter 13.6 VDC 15 Amps DC
4. AC Voltmeter
5. Audio Generator
6. Microphone Matching Network (Figure 3)
7. #Thruline Wattmeter w/150 MHz 100 W Element
8. 40 dB 50 ohm Power Pad
9. . Deviation Meter*
ll. Frequency Counter*
11. Wide Blade Tuning Tool and Hex Tuning Tool
12. External Push-to-Talk Switch
*Can be replaced with IFR Communications
Monitor or similar equipment.
270 820 pF
+
TO AUDIO MICROPHONE
GENERATOR 330 330 pr AUDIO
HANG-UP
FIGURE 3 —- MICROPHONE MATCHING NETWORK AND MICROPHONE
PLUG DIAGRAM (WIRED ENDS TOWARD VIEWER)
0300-4399-000 = LG SECBREON, 2
B. Pre-Alignment Procedure (Refer to Figure 5)
1.
we
Program the transceiver per the instructions
given in the Programming Section.
Set up equipment as shown in Figure 4.
Set Power Supply to 13.6 VDC with DC
Voltmeter.
Set the ferrite cores of L501, Do027muDU0S and
L504 flush with the top of the coil form.
Turn transceiver on with the ON/OFF Volume
Switch.
Insert PTT switch in microphone connector.
Monitor TPl on VCO Board with DC Voltmeter
with the negative lead grounded. Select the
channel programmed for the highest frequency
(transmit or receive) and adjust L201 so that
6.0 VDC is not exceeded for either transmit or
receive. Similarly,«,select ,the channel
programmed with the lowest frequency and
adjust L201 so that the TPl voltage does not
drop below 3 VDC.
TRANSCEIVER PERFORMANCE CANNOT BE GUARANTEED
IF THE TPl VOLTAGE LIES OUTSIDE THE 3-6 VDC
RANGE.
When tuning for jal etransmictter bandwidth
greater than 1 MHz, select a channel
programmed for the center frequency +100 KHz.
Tf there is no, channel, near this frequency,
reprogram a channel to it for tuning purposes.
Preset C302 on power amplifier so that the
adjustment screw 1s snug.
C. Transmitter Tuning
ak es
0300-4399-000
Connect DC Voltmeter to test point M5. Key
the transmitter and tune L501 and G50 26a LOL
peak voltage on the Voltmeter. Tune L503 for
a voltage dip on the Voltmeter. Tune L504 for
peak voltage on the Voltmeter. thas, voltage
will be about 0.5 V. Power should register on
the power meter. Teenot, tune C325..f0r a
power reading. Unkey the transmitter.
Monitor Power Meter. Tune C302, C319, and
C325 for maximum output power.
oh — SECTION 2
hin the transmitter bandwidth is less than
1.5 MHz, the amplifier should be tuned for
best efficiency. On the channel with the
highest frequency, adjust C325 clockwise (the
direction -that tightens) for an output: power
of 65 W.
D. Modulation Adjustment
Ls
oh
Select a channel with no CTCSS tone. nab ee WEE
channels are programmed for CTCSS, adjust R56l
fully counterclockwise.
Adjust the audio generator output for a 1 KHz
sinusoid at 1 Vrms amplitude.
Key the transmitter and adjust R516 to the
proper deviation level. If any channel is
programmed for CTCSS~ tone, the proper
deviation. ts*-+6-0 “KHZ. If no channel is
programmed for CTCSS_ tone, the proper
deviation is +4.5 kHz.
If the transceiver is programmed for cCTCSS
tone, set the audio generator output to 0.0 V.
Adjust R561, CTCSS tone deviation control, to
+750 Hz. Check the other channels programmed
for cCTCSS to verify that the tone deviation
lies between +500 Hz and +1 KHz deviation on
each channel.
Unkey the transmitter.
E. Carrier Frequency Adjustment
0300-4399-000
Key transmitter.
Adjust”, C545 for) the correct Garmier Trequency
within +100 Hz.
Unkey transmitter.
=Lo= SECTION * 2
FIGURE 4
TRANSMITTER TEST INTERCONNECTION DIAGRAM
3 1 EXT
DC POWER TRANSCEIVER
SUPPLY under test
EXT
DESINe UT
AUDIO INPUT
EXT
4
AC VOLTMETER
meee
6 7
MIC MATCHING WATTMETER
NETWORK
5 8
AUDIO 50 OHM PAD [J
GENERATOR nad
0300-4399-000
-19-
12
BADE.
SWITCH
2
DC VOLTMETER
10
FREQUENCY
COUNTER
9
DEVIATION
METER
SECTION 2
53.
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0300-4399-000
2-2-2 Receiver Alignment
A. Equipment Required
ONnNUM &W NE
e e
S)8
VHF Transceiver
VHF-FM Signal Generator*
AC Voltmeter
DC Power Supply
DC Voltmeter
Hex Tuning Tool
Small Blade Tuning Tool
Frequency Counter*
Sub-Audible Tone Generator
Oscilloscope to view 455 KHz
3.2 ohm Speaker Load
Sinadder or Distortion Meter with
1000 Hz Notch Filter
*Can be replaced with IFR Communications
Monitor or similar equipment.
B. Receiver Test Set-Up Instructions
iy
ae:
0300-4399-000
Connect the equipment as shown in the Receiver
Test Interconnection Diagram (Figure 6).
Complete Steps B.7 and E. of the Transmitter
Alignment Procedure (Section 2-2-1), if not
already accomplished.
Set power supply DC voltage to 13.8 VDC as
measured on DC Voltmeter.
Set VHF-FM Signal Generator to the receive
frequency, as measured on a Frequency
Counter.
Set the receiver in the monitor mode (monitor
Switch set toward middle of receiver).
Set +401, L402, 04037;°L404, and L406 so that
the core is flush with top of the coil form.
Set squelch SonteToisarull clockwise to
unsquelch the receiver and adjust the volume
to a comfortable listening level.
With no signal to the radio and power on,
adjusts SEO 9M fore4essVDCe+0.25 Veat*™ Pin 10 of
Ic405.
Refer to Figure 7 for adjustment and test
point locations.
= 21s SECTION 2
C. Local Oscillator Adjustment
A hig
Zs
0300-4399-000
Connect a DC Voltmeter between M2 and ground.
Tune L405 for a dip in the Voltmeter reading.
Connect the Voltmeter between M3 and ground.
Tune L406 for peak voltage on the Voltmeter.
Retune L405 and L406 for a peak reading on the
Voltmeter.
Circuit Adjustment
Method 1 - Quieting Method
a. Connect an AC Voltmeter across the speaker
terminals. Unsquelch the radio and adjust
the noise volume to a comfortable
listening level. Note this reference
level on the AC Voltmeter dB scale.
b. Connect an unmodulated RF Signal Generator
to the antenna connector and set the
generator to the receiver frequency.
c. -Increases.the> RF,output,of the generator
until the noise level drops 15 dB as read
on the dB scale of the AC Voltmeter.
dq. Tune G40d on U402—en.,4¥e0a, and L404. for
minimum noise. While tuning, decrease the.
generator's RE soutput. to .~maintain tae
noise level between the 20 and 15 dB
quieting points.
e. Continue with Step d. until maximum
quieting is obtained. A 20 dB quieting
sensitivity..of, 0.5 uV or Less Should "De
measured. tf “not, +bhen go” ont to bs
Alignment Method l. If the quieting
measurement is correct, then go on to
Discriminator Adjustment.
Method 2 - SINAD Distortion Method
a. Connect the SINAD Distortion Meter across
the speaker terminals. Unsquelch the
radio and adjust the volume to a
comfortable listening level.
a2 SECTION: 2
Connect a modulated signal generator, set
to the correct receive frequency, to the
antenna connector. Modulate the generator
with a 1 kHz tone at +3.0 kHz deviation.
Increase the generator's RF output UT La ae
6 dB SINAD is measured.
Adjust L401, L402, L403, and L404 for
maximum SINAD ratio.
Decrese generator's output to maintain
6 dB SINAD and repeat Step d. until no
improvement in SINAD can be made.
Measure 12 4B SINAD signal level. This
level should be less than 0.35 uV
(-116.1 dBm). Te it is not, sgorensto= rr
Alignment Method 2. If satisfactory, go
on to Discriminator Adjustment.
E. IF Adjustment
He
0300-4399-000
Method 1 - RF Level Method
Ae
Ds
Qa.
Connect a scope between M4 and ground.
Connect an unmodulated signal generator to
the antenna connector.
Increase the generator's output igteye Fe!
100 mV peak-to-peak reading on the
oscilloscope. The RF level should be
approximately 20 uV (-81 dBm).
Adjust L407 for greatest peak-to-peak
voltage on the scope.
Method 2 - SINAD Distortion Method
ae
b.
Connect a SINAD Distortion Meter across
the speaker terminals.
Connect a signal generator, modulated as
given in Step D.2.b., to the antenna
connector.
Adjust the generator's RF output Heya) |!
6 AB SINAD reading on the meter.
Adjust L407 for the best SINAD.
=—23,— SECTION 2
F. Discriminator Adjustment
ins
2.
0300-4399-000
Connect an AC Voltmeter across the speaker
terminals.
Connect a signal generator, modulated per
Step D.2.b., to the antenna connector. Adjust
the RF output level to 1 mV (-47 dBm).
Adjust L409 for maximum AC voltage on the
meter.
a: Soe SECTION) 2
FIGURE 6
RECEIVER TEST INTERCONNECTION DIAGRAM
Loe
SINADDER
diz
4 3.2 OHM
SPEAKER
DC POWER LOAD
SUPPLY
Breen ce sLNPUT 3
AC VOLTMETER
1 TRANSCEIVER
under test
5
DC VOLTMETER
OSCILLOSCOPE
SIGNAL
GENERATOR
9
FREQUENCY
COUNTER
0300-4399-000 O55 SECTION 2
FIGURE 7
RECEIVER TEST AND ADJUSTMENT POINT DIAGRAM - MAIN BOARD
M20
TONE / FILTER
PCB
0300-4399-000 ~26 SECTION, oi
2-2-3 Programming the Radio
A. General
Programming of the RH/WH series radios can only be
accomplished when the radio is placed in the program mode by
following the directions in Section B. Section C describes
the programming procedure for both 10 and 16-channel radios.
Be sure to follow the procedure exactly, otherwise the radio
will not perform properly.
B. Entering the Programming Mode
1. Before turning on the radio, be sure that. the
programming jumper, JU401, is installed.
2. Turn on the radio.
3. Enter the programming mode by pressing "PRO PRIOR"
"10" on the keyboard. The display will go blank.
4. The radio is now in the program mode. The radio will
remain in the program mode until turned lepers The
radio is now ready to accept programming data.
Follow the programming procedure for the particular
radio being programmed. When programming is
completed, follow the instructions on exiting the
program mode.
cr Programming (Note - to enter a zero (0) #@press@theve ten
(10) button on the keyboard.)
Ll. Ten-Channel Radio Programming (RH600 )
a. Enter the program mode (see Section B).
b. Key in the receiver frequency (6-digit code) in
kHz.
c. Select the simplex/half-duplex code (i-digit
code)
0 = simplex
8 = half/duplex
0300-4399-000 e270 = SECTION 2
d. Select cTcSS/transmitter operation code (l-digit
code)
0 = normal RX/TX operation
(CTCSS encoder and encoder enabled if CTCSS
tone selected)
2 = Normal RX/TX operation
(CTCSS encoder enabled only if CTCSS tone
selected)
4 = RX operation only; transmitter disabled
(CTCSS decoder enabled if eTCSsS tone
selected)
ef Key “in .CTCSS. stonescode (2-digit code) from the
table below.
Code Frequency Code Frequency Code Frequency
00 no tone 13 1035-5782 26 1626 2..HZ
01 67.0 Hz 14 L09022 27 167.9
02 Teg 15 1109 28 A7 328
03 74.4 16 114.8 29 179.9
04 7720 17 118.8 30 186.2
05 79.7 18 £23 .0 Sek 192.8
06 8255 19 L2703 32 203.5
07 85.4 20 £32.38 aus 210.7
08 88.5 21 136.5 34 22806
09 2 oe Us bai 53 35 225067
10 94.8 23 146.2 36 233.6
11 97.4 24 151.4 37 241.8
Le OO <0 25 156% 7
f. If an eight (8) was entered in Step c (half-
duplex channel), then key in the transmit
frequency in kHz (6-digit code).
g. Press the ENTER button on the keyboard.
h. Press the channel number the data is to be stored
is we The channel number will be displayed after
the data is stored.
i. Program the other channels by doing Steps 6b
through h for each channel.
j. Delete any unprogrammed channels by pressing the
DELETE button on the keyboard followed by
pressing the ENTER button and the channet to be
deleted. If deleting more than one channel, the
DELETE button only needs to be pressed once
followed by the ENTER - CHAN. NO. sequence fOr
each channel to be deleted.
0300-4399-000 —20- SECTION 2
1 Do
Review any channels that might be considered to
be improperly programmed (see Section D).
Exit the programming mode by turning the power
off. Remove the programming jumper, Ju40l.
Sixteen-Channel Radio Programming (WH6016)
Enter the program mode (see Section B).
Key in the receiver frequency in kHz (6-digit
code).
Select the simplex/half-duplex code (l-digit
code).
0)
8
simplex
half-duplex
ou
Select the transmitter operation code (l-digit
code).
= normal RX/TX operation
4 = RX operation only; TX disabaled
Key in the RX CTCSS code from tone table given in
l.e (2-digit code).
Key in the TX CTCSS code from tone table given in
hey se mple Saxe Wike id ey eX eye yur This step does not have to
be done if programming a simplex channel with the
same RX and TX tone. The TX tone code must be
entered if programming a half-duplex channel.
Key in the TX frequency in kHz (6-digit code) if
programming a half-duplex channel.
Press the ENTER button on the keyboard.
Press the channel the data is to be entered in.
Note that when pressing the "1" button the tens
digit on the channel display starts blinking the
number 1. It will do this for about 2.5 seconds,
waiting for a second digit to be entered (for
channels 11 through 16). The display reverts to
channel 1 if no second digit is entered in the
allotted time; channel 1 will then be programmed
with the data.
Repeat Steps b through i for all the channels to
be programmed.
Delete any unprogrammed channels. Follow the
same procedure described ireele ji
0300-4399-000 =29- SECTLON Gare
1. Key in the scan delay code (l-digit code) from
the table below. 3
Scan Delay Code
-680 sec 0
ne sec 2
Za sec 4
m. Key in the Time-Out Timer code (l1-digit code)
from the table below.
Time Out Code
NO time out 0
30 sec i
60 sec ri
120 sec 4
n. Key in the Decode Interrupt Delay Code-. (l-digit
code).
i. If the built-in CTCSS is used, key in "O".
ii. If another type of coded squelch system is
used, key in the time delay for sampling the
output of this system in hundreds of
milliseconds (1 = 100 mS delay, 2 = 200 mS
delay, etc. ,., Up, tO 9 = 900) ms delay).
Oo. Press the ENTER button on the keyboard.
p. Press the SCAN button on the keyboard.
q. Exit the programming mode by turning off the
radio and removing the programming jumper, JU401.
D. Reviewing the Program
1. Before the channels can be reviewed, the radio must
be in the programming mode. If the radio is already
in the programming mode, then continue on to Step Ze
if not, follow the procedure in Section B.
ra
0300-4399-000 oes | See SECTION °Z
Channel Programming Steps Frequency
1. Receiver Frequency (six digits) no tone
Note: For WH2516UKif the frequency is seven digits subtract a Hz
2.5 KHz and enter the results 74.4
2. Simplex/half-Duplex Code (one digit) ‘i
Simplex: B=0 Half-Duplex: B=8 8255
85.4
3. Transmitter Operation Code (one digit) j 88.5
Normal RX/TX operation: C=0 Disable Transmitter: cC=4 eas
4. Receiver CTCSS Tone Code (two digits) Aiea
DD = See table at right E035
LOW 2
5. Transmitter CTCSS Tone Code (two digits) TORS
YY = See table at right. Does not need to be entered if Simplex che
channel and tone the same as 4. Must be specified if half- 123.0
Duplex is programmed. 127.3
6. Transmitter Frequency (six digits) ee
See note in 1. Does not need to be entered if Simplex channel. 141.3
4622
7. Press the ENTER button on the keyboard 151.4
5 Grew,
8. Press the channel number the data is to be entered into. G22
167.9
al SNe {5}
es 2) a he A La 179.9
186.2
192.8
Radio Configuration Data Format: TW xX Enter Scan Sb ae
Qe Saale
2) 7
233.6
Radio Configuration Programming Steps 241.8
1. Scan Delay Code 3. Key in the Decoder Interrupt Delay code from the
table below:
Delay TeLOLDA BG eo tirtor UK
ergs Decoder Delay Code
-68 sec 0 1
1.3 sec 2 3 Built-In CTCSS 0 0
2.0 sec 4 5 External 100 ms 1
External 200 2
External 300 3
External 400 4
External 500 5
Phe T.0. 0. ‘Code External 600 6
W External 700 7
No T.0.T. 0 External 800 8
30 sec 1 External 900 9
60 sec 2
120 sec 4
16-CHANNEL PROGRAMMING REFERENCE TABLE
r- Channel Programming Code—
Channel Programming Data Format: ar es DD ae a
4. Press ENTER
5. Press SCAN
Channel display will
display a "u"
Chan No.
0300-4399-000 co) — SECTION
2
NOTE: When using external decoder consult the factory.
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SECTION
hate}?
0300-4399-0000
2. Reviewing the program is the same for both 10- and
16-channel models.
a. Press the MANUAL button on the keyboard.
b. Press the channel number to be reviewed. Note
that when reviewing channel 1 on the 16-channel
radio, a "1" will flash in the tens Gad. This
is not part of the channel's program; the radio
is just waiting for the second digit entry for
channels 11 through 16.
The radio will display, using the ones aigit gon
the channel display, the programmed data for the
selected channel. Each data digit is displayed
for two seconds, starting with the receiver
frequency through to the transmitter frequency in
the same order the channel was programmed.
3. Reviewing the radio configuration (16-channel radio
only)
a. Press the MANUAL button on the keyboard.
b. Press the SCAN button on the keyboard. The ones
digit on the channel display will display in
order: the scan delay code, the time-out-timer
code, and the decode interrupt delay code, in
that order (each code displayed for two seconds).
4. If leaving the programming mode, turn Off tne, vad1o
and remove the programming jumper, Ju40l.
0300-4399-000 — Sh SECTION 2
2-3 INITIAL TESTS
Before installing the unit, perform the following checks.
Select and test each channel for:
1. Proper receiver sensitivity (.35 uV SINAD max)
2. Proper transmitter power output (60 W min)
3. Correct transmitter carrier frequency (+100 Hz)
4. Correct modulation deviation limiting point
+4 kHz peak - A,B,C models with a CTCSS channel
+4.5 kHz peak - A,B,C models without CTCSS
5. Correct CTCSS tone modulation (if applicable)
+750 Hz peak - A,B,C models
6. Proper CTCSS decoder operation (if applicable)
7. Correct CTCSS encoding frequency (if applicable)
8. Correct VCO voltage in RX and TX modes (between 3-6 VDC)
Select all the functions on the keypad to be sure they are
operable. For example, place the radio in the scan mode and
make sure it will lock-up on a busy channel. Check the
Priority Function and Priority Scan mode for proper
operation. Be sure all the LEDs are lighting correctly.
After installation, test the unit on an operational channel,
testing out any encoder options, for example, to see if the
system responds correctly. Start and run the vehicle to be
sure there is no interference with the radio's performance.
2-4 CIRCUIT DESCRIPTIONS
Receiver (Refer to Figure 8 - Block Diagram and Schematics)
The received signal passes through a solid state T/R switch
on the PA board and then to the RF amplifier Q409 on the Main
Board. The output of the RF amp is coupled to the gate
circuit of the mixer stage, Q410. The signal of the first
local oscillator (LO) is fed to the source input of the mixer
transistor, Q410. The first LO's frequency is 10.7 MHz below
the received signal's carrier frequency.
The resultant 10.7 MHz signal from the mixer is filtered by a
four-pole crystal filter. The filtered 10.7 MHz signal is
fed to the IF integrated circuit. The IF chip contains the
second LO and second mixer. The second LO's frequency is
10.245 MHz. By mixing the 10.7 signal and the second LO, the
second IF -is obtained, 455 kHz, which is filtered by a
ceramic filter, CF40l. The filtered 455 kHz is passed
through limiting amplifiers and then coupled to a quadrature
detector. The quadrature detector (in IC405 along with
1300-4399-000 -34- SECTION 2
L409) converts the frequency modulated signal to an amplitude
modulated (voltage) signal. The audio output is Pin 10 of
Ic405.
The audio output from the quadrature detector, Rais 10 Ay ies
applied to the de-emphasis circuit, R609 and C603 on the
Filter Board, and to the input of the low-pass tone filter,
ICc60l (C and B). The low-pass tone filter amplifies the tone
and filters out the audio voice signals. The output of the
tone filter is fed into a Schmitt trigger, Q602 and Q603,
which shapes the tones into the correct digital waveforms for
the uP to decode. If the correct tone is decoded, the uP will
turn the MSG LED on and un-mute the receive audio path.
After the de-emphasis circuit, the receive voice audio passes
through a high-pass filter, IC601 (D and A). The high-pass
filter reduces the amplitude of the tone signal to an
acceptable level in the receive audio path with a minimal
affect on the overall receive audio.
The, .input 'to the squelch circuit is restricted to high
frequency audio, approximately 6 to 25 kHz, by the use of
R and C components. The "noise" occurring in this range is
amplified by 1C405 and detected by CR410. TheaDCas.voLtage
resulting from the detected "noise" is applied to 1I1C405,
Pin 14, which drives Pin 16 low and activates the squelch
switch circuit, Q41l, Q412, and Q413. When the "noise" is of
sufficient amplitude, the audio is turned off and _ the
receiver is muted. When a signal appears, the "noise" is
reduced to a point where the detected signal is no _ longer
sufficient to mute the audio.
On a channel that is programmed for receive CTCSS (with the
microphone on hook and the monitor switch not in the MON
position), Pin 28 of the uP, IC403, will activate the squelch
Switch muting the audio until it decodes the correct tone
frequency from the Schmitt trigger circuit on the Filter
Board. This occurs even though the noise detected by the
squelch circuit is reduced by a receive signal of the correct
RF carrier frequency. When the correct subaudible tone is
detected, the uP releases the squelch switch, allowing the
audio signal to pass on to the audio amplifier, C406; am and
then to the speaker.
0300-4399-000 i he 3 SECTION 2
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BLOCK DIAGRAM
8
FIGURE
2
SECTION
-36-
0300-4399-000
Transmitter (Refer to Figure 8 - Block Diagram and Schematics)
Audio speech is converted from air pressure variations to an
electrical signal by the microphone, which also
pre-emphasizes the audio signal by 6 dB per octave. This
signal is then applied to two operational amplifiers, ECS OD
and IC5O01A. The Modulation Limiter is the second operational
amplifier, IC501A. There is sufficient gain in the first and
second operational amplifier so when a signal is applied
which is 20 dB greater than that required fora 3 kHz
deviation, the second operational amplifier will go inc
limiting.
After the audio signal is limited, it passes through a
four-pole active low-pass filter. This active filter
consists of the third and fourth operational amplifiers of
IcSO1l"*(B- and C) and.its associated resistors and capacitors.
The resultant signal is then limited with respect to
sideband splatter and has an 18 dB per octave roll-off above
3kKHZ.
The cCTCSS tones are applied after the audio limiter but
before the TX audio low-pass filter. The tones are generated
by the uP and their harmonics are filtered by the low-pass
filter, 1C601, .on the Filter Board. R56. 1eus msed) Lote tne
adjustment of the tone modulation signal.
The output of the modulation amplifier/post limiter Filter
circuit, Pin 8 of Ic50l, is fed to a master deviation control
(R516). This control is set by running the modulation
amplifier into full limiting and adjusting R516 for maximum
system deviation.
The audio is then applied to a varactor frequency modulator
on the VCO Board. The varactor, CR201, is series-coupled
through C217 and C218 to the voltage-controlled oscillator,
VCO. By varying the voltage on the varactor diode at an
audio rate, the resonant frequency of the VCO is varied,
which results in the oscillator output being frequency
modulated at the audio frequency. The capacitance change
versus voltage of the varactor is almost linear, which
results in low distortion. The frequency doubling stage,
Q501, increases both the VCO frequency and the deviation to
the desired value.
The input to Q501 is one half (1/2) the carrier frequency and
after passing through Q501, the signal is “rich" in harmonics
of,; ther, inpu tyeirequency: L501 and L502 are tuned for the
carrier frequency and have attenuation to the fundamental and
other harmonics. The signal is then amplified by 9502 and
further attenuation to the fundamental and harmonics is
achieved by L503 and L504. Q503 further amplifies the signal
to the level necessary to excite the PA Board.
0300-4399-000 =—3}— SECTION 2
On the PA Board, ‘0301, 302, and 303 amplify the signal “to wthe
desired final output power. The output of Q303 is matched to
50 ohms by C325, C326, and the PC stripline. These stages,
along with''Q503,alloperate™in the Class*c mode.
During transmit, biasing current is supplied to pin diodes,
CR3I0P * "and 7 OCR3S02 : When "CR302 “is “ “biased #0 "on ¢™sla-: short=
to-ground is provided at this point which, through phase
rotation in L307 and C331, presents a high impedance to the
RF path and prevents the RF power from going to the receiver.
Also, when CR301 is turned "on," it presents a low impedance
to the RF power, thereby allowing the RF power to go into the
low-pass filter.
Harmonic suppression, which reduces the harmonics of the
carrier below the level that is required by the FCC, is
provided by the output low-pass filter. THIS “filter-4is
composed. of (L308, ‘L309, C332, C333, C334, and*C338% The
cutoff frequency is approximately 210 MHz.
The temperature of the power amplifier, Q303, is monitored by
the RT301 thermistor. If, for any reason, Q303 begins to get
overheated, Q304 will shut down the regulator circuit formed
by CR304 and Q305. This regulator is the operating voltage
source of the PA exciter, Q503. With its supply voltage
removed, Q503 can not drive the PA to put out power until
Q303's temperature is below the critical point.
Control Board
The digital displays, DS101 and DS102, on the Control Board
are seven-segment yellow LED channel displays. These
displays are controlled by circuitry on the Main Board.
Binary-coded decimal information is sent to the
decoder/driver, 1C404, from the uP for DS102. Ic404 then
drives DS102 to show the correct decoded number. DShOlGs is
controlled by Q407 which is activated by the uP.
The TX, SCAN, MSG, and PRIORITY LEDs are controlled by Q10l1,
Q102, Q103, and Q104, respectively. These transistors are
used as NPN saturated switches which are activated directly
by the uP. Q101 is controlled by the TX 9.5 V supply; Q102,
Q103, and Q104 are controlled by the microprocessor, I1C403.
The MON switch, SW101, is a SPDT switch used to disable the
tone decoding when on a tone channel and to reset the MSG
LED. The DAY-NIGHT switch SW102, is a DPDT switch used to
control the brightness of the display and the illumination of
the keyboard. In the DAY position, the displays are driven
by 5 V and the keyboard is not lit. In the NIGHT position,
0300-4399-000 eed oka SECTION 2
the displays are driven by 2.9 V because three diodes are
added in series with the 5 V line to the displays. Also in
the NIGHT position, the keyboard is illuminated by an
incandescent light bulb in conjunction with a light-bar.
The volume control, R101, takes the audio from the squelch
Switch circuit and controls the voltage level going to the
audio amplifier, IC406. The squelch control, R102, controls
the amplitude of noise signal supplied to the input of the
squelch noise amplifier, Pin 12 of IC405.
Synthesizer
The synthesizer consists of a voltage-controlled oscillator
(VCO), reference oscillator, "N" and "A" dividers, phase
detector, and a low-pass loop filter. The digital
information for the synthesizer to be at one half (1/2) the
correct frequency for the receiver or the transmitter comes
from the uP. The synthesizer integrated circuit, 1C503,
contains the referencey,oscillator;\) "N%.. divider, phase
detector, out-of-lLock detector, and receive/transmit
switches.
THE aVGOs Consiiste: CEEO2Z02i G20 jC217 ,3C209.7C205,.C218,,; C208,
C2075e6.CR202 pmandyCR20.2 The frequency of the oscillator is
determined by the voltage across CR202. This frequency is
divided by either 15 or 16 by IC201. The resultant frequency
is then divided by a programmable "N," contained in IC503,
which results in a frequency close to 2500 Hz.
The kne ference. oscillator consists, of, Y50:L,. I1C503,.C543, C544,
and C545, which is used for fine frequency adjustment. The
oscillator is a parallel resonant Colpitts type. The
reference oscillator has a heater-controlled crystal, Y50l.
This crystal is specified to ensure that the frequency
Stability between -5°C and 65°C is within 0.00053. The
heater resistor, R545, begins to heat up at approximately
+10°C and is well activated at 0°C, thereby keeping the
crystal temperature above 0°. This ensures 0.0005% frequency
stability over the temperature range of -30°C to +60°C for
both the receiver and transmitter. C543 #1csa 4 warnd <Co4a5Mare
NPO ceramic capacitors, thereby adding additional stability
to the oscillator. The reference oscillator frequency of
10.240 MHz is divided by 4,096 and the resultant frequency is
2500082.
The reference 2500 Hz signal is compared to the signal out of
the com Ne Gounter (anternally) and an error._.signal is
generated at Pin 4 of IC503.
0300-4399-000 = SECTION 2
The error voltage from the phase detector is then amplified
and filtered by IC502 and becomes the control voltage for the
vco. This voltage is applied to CR202 and changes the VCO
frequency ina direction that reduces the phase differences
between the reference oscillator frequency and the VCO
frequency. When the loop is "LOCKED," the frequency of the
vcoO is proportional to the average frequency of the input
Signal from the reference oscillator.
Microprocessor and EAROM
The microprocessor, IC403, acts as a central controller. Le
monitors inputs such as the keyboard, the EAROM, PTT line,
monitor switch, hook switch, programming jumper, squelch and
CTCSS'* tone input. It controls the display and status LEDs,
information placed in the EAROM, receiver squelch operation,
the beep for keyboard contact closure, synthesizer frequency,
CTCSS tone frequency, and transmitter/modulation enable line.
Starting with the keyboard, which is 44 x 4 crosspoint
Matrix, the column contacts are connected to Pins 3, 4, 5,
and 6 of IC403 and the row contacts are connected to Pins 19,
LBs2 heL7?,e0 and) 164 of) TC4032 Whenever the radio is idle, the
column lines’ are low (less than 0.8 VDC) and the row lines
are high (greater than 2 VDC). When a contact is closed, the
microprocessor senses a change on one of the row lines. and
investigates further to determine which column closure caused
the row line to go low. The voltages on the schematic are
when the keyboard is idle.
The display and status LEDS are controlled by the
microprocessor. DS101 displays a one (1) when Q407 is turned
on. When Channel 10 is selected, the base voltage will be
0.7 V. DS102 is driven by a BCD to seven-segment decoder,
IC404. The display segments are defined below in Figure 9.
BCD CODE
a
are ves DISPLAY.cn OvwCu-Ben A
O 0000
f b 1 0001
g 2 Oo#4 £0
‘oureenee ar me 3 04024 44
4 O21 ©OLEO
.| [- 5 O81 Storey
fae sm 6 Ore! 414460
d 7 Ot ae of
3} 1800240
9 14! Ort
FIGURE: Y
0300-4399-000 -40- SECTION 2
The inputs to IC404 are four (4) BCD (binary-coded decimal)
lines (A,B,C, and D) from the microprocessor, IC403. A zero
is displayed when the BCD lines are all low (less than 0.8 V)
as shown in the table of Figure 9. Portman zero,thecsay. b,c
d, e, and £ segments are turned on by pulling Pins l, 13, 10,
By lade and 2 low, respectively. The microprocessor also
controls the PRIORITY, MSG, and SCAN LEDs through Q104, Q103,
and Q102, respectively. Turning on the transistors causes
the LEDS to turn on.
ceTcssS tones are both encoded from and decoded by the
microprocessor. The encoded tone is derived from the signals
athePinsye30>7eSi;, bands32e0f. 1G403, These are summed and
filtered on the VCO/Filter Board. The CTCSS tone signal
received after filtering and shaping on the VCO/Filter Board
is interrogated by the microprocessor at Pin 38. The
microprocessor, if programmed for CTCSS, will interrogate the
signal on the line provided a carrier is present. Carrier
detection is accomplished by momentarily looking at the
squelch control line (the line is being used as an sGghelbhaiet Sih g|
this case) to determine whether the radio is squelched or
not. The squelch circuit.must be operative, i.e. the squelch
control must be adjusted so that without a carrier present
there is no noise from the speaker. The reason this is done
is to eliminate false decodes on noise. When a signal is
received and the correct tone is present, the microprocessor
releases the squelch control line (Pin 28 of IC403 now acting
asesanh output): The microprocessor will also release the
squelch control line when Pins 14 or 23 go high; this occurs
when the microphone goes off-hook or the monitor switch is
in the MON position.
The CTCSS tone frequency is determined by counting circuitry
in the microprocessor. The time base reference for these
tones comes from the timing oscillator of the microprocessor.
The oscillator's frequency is 3.579545 MHz. This oscillator
serves as the clock for the microprocessor and is essential
for its operation.
The microprocessor programs and reviews information, stored
in the EAROM, through a buffer, IC402. ThaselLoancuanstactes
voltage levels between 5 V (microprocessor side) eV SPT
(EAROM side). The inputs, driven by 0 and 5 V levels, are
Pins 2765 pAq7 P89 wbbL, wandsgl4s TheeAGUtLbUtSy.40 mandelo VelLevel
dtivernsolarenP ins 33504, 167810) 542,oand 15. The voltages on
the schematic are static, that is the voltages shown are when
the EAROM is idle.
When the EAROM is accessed (for a read or write operation)
the high voltage supply is activated (by the microprocessor).
The collector of Q403 pulses low to activate the high voltage
supply. During this time there is a +15 V level at Pin 1 and
an -2) VV. Levelv at=Pinv2,of IC401. The status LEDS also
flicker during an EAROM access.
0300-4399-000 aay loom SECTION 2
The receiver and transmitter frequency codes are controlled
by the microprocessor. The microprocessor takes the stored
information from the EAROM and serially transmits it to the
synthesizer chip, IC503 (SYNTH DATA, SYNTH CLOCK lines). The
synthesizer clock path (SYNTH CLOCK) is the line connecting
Pin 8 of IC403 to Pin 9 of IC503. The synthesizer data path
(SYNTH DATA) is the line connecting Pin 9 of IC403 to Pin 10
of IC503. Both lines are normally low when in an idle state.
During data transfer the clock line alternates between spa’ f
and 0 V, around a frequency of 12.8 kHz, clocking - the. data
LnGeuLCs0o. When the radio is turned on, the microprocessor
is reset by the delay in voltage rise on Pin 39 caused by
C470. A low on this line restarts the microprocessor and the
radio will “set-up" on the priority channel.
The 1l6-channel radio has a different reset circuit than the
L0-channel radio. Instead of C470 resetting the micro-
processor a transistor, Q405, does. When the radio is
turned on, Q405 turns on when the 13 V switched line (which
biases Q405 via R420) reaches 0.7 V. When the voltage on the
IME hats Switched line reaches 8 V, Q404 is biased on, thereby
turning off Q405. This series of events holds Pin 39 of
IC403 low while the 5 V supply stabilizes. Any time the 13 V
line fluctuates below 8 V, the microprocessor will be reset.
This allows the microprocessor to be held in reset before the
5 V supply becomes unregulated.
36 V Supply and Control Switching
The 36 V DC to DC converter is controlled by the uP. To test
if the 36 V power supply is operating correctly, ground the
collector of’ 0403 "to “turn on the (DC “to De Converter. The
main components of the 36 V supply are T401, Q401, Q402,
CR401, CR402, CR403, R401, R402, R403, R404, C401, C402, and
C403. When activated, there is approximately +15 V on the
cathode of the 36 V Zener diode, CR403, and -21 Von the
anode of CR403 (voltages are relative to chassis ground).
The radio's main power, 13 V at J3, is regubated into two
Supplies. The digital circuits associated with the
microprocessor and synthesizer derive power from the ee
supply (regulated by IC504). The circuits which derive power
from the 9.5 V supply are as follows: the receiver's RF, IF
and audio circuits; the transmitter's modulation and exciter
circuits; and the VCO oscillator, buffer and loop filter
Cifkciies.
0300-4399-000 -42- SECTION ~2
The receiver circuits receive a switched 9.5 V voltage which
is controlled by Q508, Q507 and the synthesizer chip
(EG508, > Pin Ize) ee In the receive mode the base of Q50/7 is
around 0.7 V. G507 saturates, turning on Q508. The
transmitter power supply to the exciter is a switched 9.5 V
voltage also. This voltage is controlled by 0505, ~ 9509,
Q506, the synthesizer chip §(1C503;, (Pin 13), 9406," and ‘the
microprocessor (1C403, Pin’ 27). 9509 is turned on only if
three conditions are met. First, the transmitter frequency
data transferred to the synthesizer IC must be received
correctly; second, the phase-lock loop must be “LOCKED";
third, the microprocessor must release the ENABLE line. The
synthesizer chip releases the TX ENABLE line at Pinesisi of
Ic503 if the TX frequency information is correctly received.
When the synthesizer is phase-locked (voltage at TPl between
3 and 6 vDC and adjustable by L202); Pin 7 of I¢503 will be
wT ov aAyDC. If, and when, the synthesizer loop goes ouEe aot
lock, Pun) 7) of 1£C503— pulses Low, holding the voltage at
Pin’ 16 LC ou3. to around 0.8 VDC. The microprocessor releases
the TX ENABLE line by pulling the base of Q506 below 0.5 VDC
via Q406. 9406 also pulls the base line of Q201 low,
activating the modulation varactor on the VCO Board. When
these three conditions are met, the TX ENABLE line is at
1. 6eed DGe—aGUENLNG.On Q509; this, in turn, allows the exciter
to receive its supply voltage. Q509 also turnS on Q510,
allowing a switched 13.8 V line to activate the transmit
Veway sonnel ba Board. This, in turn, supplies voltage
through the thermal protection circuit to the PA exciter,
Q5037.
2-5 TROUBLESHOOTING
The troubleshooting flow charts on the following pages are
designed to aid in localizing the problem area. Once the
problem area is localized, use voltage measurement data,
visual inspections of components in the area, and ~other
troubleshooting practices to find the defective component.
The voltages shown on the Schematics are all referenced to
ground. They were made with a yoltmeter having a 10 megohm
input impedance.
0300-4399-000 -43- SECTION a2
PROBLEM 1 - RECEIVER COMPLETELY DEAD
With no signal applied; MONITOR MODE (CTCSS) :
Sgquelch disabled
LEDS
Light Channel
Display OK
Power Supply
Problem
IF Chip Problem: Check power on Pin 4.
Check discriminator voltage (4.5 VDC)
at 'Pincid.
Check voltages on Pins 5,6,7, and 8.
Audio at Pin
10 of IC405
yes
Noise Audio
AtrPin .Dirot
IC601
Problem with Filter Board: Check DC |
voltages on Pins 1 and 14 (4.2V).
Check for audio at Pin 14 of IC60l.
yes
no Defect in Squelch Circuit: Check
voltage at Pin 16 of IC405 (5V).
Noise Audio
At Collector
of Q413 Check voltage at collector of Q412
(OV).
yes Vol control max volume
no Coupling Problem: Bad vol control,
bad cable or connector, open
“Noise
Audio on
PinwE"o£f- 1E406
coupling cap.
yes
| Power Amplifier Problem: Check power supply; check speaker
jack connection.
PON eae Ws oe tied cc eas I AN Sn Sn 0-98 Sidi pdm ed
0300=—4399-—000 -44- SECTION) 12
PROBLEM 2 - RECEIVER NOISE PRESENT BUT WILL NOT RECEIVE
A SIGNAL
START Signal generator connected on correct
frequency: RF output at maximum:
Squelch circuits deactivated.
vco Control no Synthesizer not locked; if cannot lock
by adjusting L201, see synthesizer
Voltage OK
* troubleshooting
yes *Voltage at TP1l must be between 3 and
6 VDC and controllable by L201.
no VCO drive or doubler stage problem:
M2>1.5 VDC Check voltages on Q408; unplug VCO
tunable by drive coax; check for OdBm level at
L405 1/2 the LO frequency at the VCO
Output jack.
yes
M3>1.0 VDC
tunable by me Mixer or doubler output problem:
L405,L406 Check voltages on Q408.
Connect a 10.7 MHz signal through a
470pF capacitor to Pin 18 of Ic405;
modulate with 1 KHz tone; set RF
SUCCES COM> mV.
2nd IF problem: 2nd LO Osc not
running; check crystal yY402;
defective IF chip (IC405)
RF amplifier bias trouble: Check
base bias supply voltage; check
collector supply voltage; defective
transistor.
a er ee eee
PA Board antenna switch trouble (unplug receiver coax from
PA and connect to signal generator). VCO locked but on
wrong frequency (see Synthesizer Troubleshooting).
0300-4399-000 -45- SECTION 2
PROBLEM 3 - RECEIVER AND TRANSMITTER OFF FREQUENCY
START
vco/Synth no See Synthesizer Out-of-Lock Trouble-
locked up* __ shooting Procedure.
a
*Must have voltage at TP1l between 3 and
6 VDC and controllable by L201.
yes
Measuring the signal at Pin 14 of IC503
through a 4.7pF cap into a 1 megaohm
input impedance counter.
Is
frequency no ae a ei) en
10.240 MHz Ref Osc problem: Bad crystal; bad Ref
+100 Hz Osc aboard IC503; cap values cnanged.
yes Connect a scope to Pin 6 of 1C503;
observe waveform and compare with
Figure l below.
me pra rn ee
»~o Correet Prescaler Dual modulus control
waveform output OK failure: Check
(Figure 2) voltages around
IC503; possible
Ic failure
| = *
yes failure:
voltages around
prescaler IC201,
QO20577% and 0202. |
Check Synth Synth chip counter failure: Check |
Frequency voltage around IC503; defective IC503.
S ignature eg Oe en ee ae ey a ee ees : ae ae See ERS
3 not OK
|e Microprocessor or memory failure |
2420 "us —
FIGURE | r 7] i
= — .5-3us
FIGURE 2 nn
POSTS 4vpp 3.8 MHz < FREQ. < 5.7 MHz
ay
0300-4399-000
-46- SECTION 272
PROBLEM 4 -—- SYNTHESIZER LOOP WILL NOT LOCK
START) Connect frequency counter to output jack of
VCO; frequency around fy Von
fe)
Po = no
7 Frequency \no Any oscillation {VCO or bufterd’fazlure
OK? at all
yes vco out of frequency
range; component
value changed.
Check Fig. 2 waveform as
shown in Problem 3.
a
Fig. 2
waveform
Ss
1S
Prescaler Failure
Check reference Osc. as shown in Problem 3.
Frequency
—
Ref. Oscanot’ runtiing .
yes Check synthesizer freq. signature at
Pins’ omand Loot IC503 with signature
analyzer, logic analyzer, or storage scope.
a
~
Check ~
7 Synth Freqx_no
‘~ signature ~
sO Kae
Microprocessor sending no code or grossly
wrong code.
Connect scope probe to Pin 4 of 1C503; should
have four erratic pulses.
' |Defective PLL
Loop Filter failure; check voltages around e502
Le
0300-4399-000 47 — SECTION 2
PROBLEM 5 - NO TRANSMIT POWER
no No VCO output or Q501 stage faulty.
Voltage
as Sarg
yes
M5
Voltage
tunes up using
L501,L502,
L503
no Q502 stage problem; M5 voltage should
be. around..5,.VDC.
Check voltage at collector Q503.
yes
050.3aVc¢ Faulty relay or thermal protection
7V no circuit on PA Board.
Check exciter power output; unplug the
coax at PA input; connect to RF milli-
wattmeter.
yes
Low power will still cause the
transmitter to put out power (must
be >300mw). If power is low, then
do not continue; the problem is in
the Exciter or VCO.
P :
re exciter
\ 400 mw
*<S
Problem is in PA deck
(continued on next page)
0300-4399-000 -48- SECTION® «2
e
RX asv/\ He
(ZONE |-G3)
RX INPUT
FROM ANY
SWITCH,
ON PA Rae
AR
Heene 2.2
CTCSS TONE DET
13 (ZONE I-H6)
1C403 PIN 38
cTcss TONE
TO MODULATOR
39 (ZONE 1-C5)
R56!
J2 ae
SPKR SPKR
JACK JACK
3.6 V
WITCHED
1000 All
TO PIN |
OF MIC JACK
3.2 OHM
EXTERNAL
SPEAKER
PINOUT
CR4I4 aey SPEAKER JACK
3
CR4I5
RX INPUT
(ZONE 2-H8)
(ZONE 1-0!)
|
ANTENNA
CONNECTOR
% MODEL SENSITIVE (- MEANS
VOLTAGES IN RED
VOLTAGES IN BLUE
UNSQ
RH 6OO/ WH 6O%6 A
8.2 pF
Pe ee AIN SCHEMATIC
ri 6007 WHO C 704-174B
162-175 MHz
SHEET 2
0300-4399-000 —S3— SECTION 2
PROBLEM 5 - NO TRANSMIT POWER
no No VCO output or Q501 stage faulty.
Voltage
en
yes
M5
Voltage
tunes up using
L501,L502,
L503
no Q502 stage problem; M5 voltage should
be. around. .5,.VDC.
Check voltage at collector Q503.
yes
Q503 Vcc Faulty relay or thermal protection
7V no Circuit on PA Board.
Check exciter power output; unplug the
coax at PA input; connect to RF milli-
wattmeter.
yes
Low power will still cause the
transmitter to put out power (must
be >300mw). If power is low, then
do not continue; the problem is in
the-xcd tex.-or VCO.
P ’
& exciter
\ 400 mw
mS
Problem is in PA deck
(continued on next page)
0300-4399-000 -48- SECTION 2
+9.5V
YU406 JU 416 (ZONE 1-G2)
RX asv/\ eae rT TX 9.5V
(ZONE 1-63). BLU GONE 1-63) +5 ve
: R435 38 ) su 602
100 R436 ) RED 36
RX INPUT 37 ) Ju 603
FROM Al + 470 ORG
SWITCH, Gss3 C434 ae ge
ON PA Ol Cf. red
BOARD ~<C4i8 T 10 uF TX CTCSS TONE
al 22 = +> \6v (ZONE FHS)
65 I. ~ JU607
: Gs, ‘
\F CH JU 608 JU606 CTCSS TONE DET
600-565 efi RX AUDIO is — a as a> (ZONE I-H6)
1K $? yu4o4 C451 GRY BLU 1C403 PIN 38
10.700 MHz 15 a rk?) ae aoa is WAS ec 1000 CTCSS TONE
Ik3d / 150 T 1000 = Ju6o! TO MODULATOR
oes AA Lill pia FILTERED AUDIO re TE (ZONE I-C5)
a ie 39 oO, — P501 BRN R56!
XF 40l XF 402 “Jon 49 ee RIGO ye C446 =; JU520
C447 C449 (C450. |
47K | 4700 Iss, R SEE FILTER BD.
330k 1000] ]1000 [i000 BL SJ gice SCHEMATIC
es 1ca42 R439 10K 604-478
pie T 39 c435 ie pe om -,
P| _) 2Nn 5668 T -OlnF 180K |+ c448 R444 =
= = rats ie SSQUELCH JU604
0.7 ol We sae 82 1 grass ,CONTROL Sins
Ju4it ( ( JU.400 =
BRN Lo Ag BLK avis
604-484
L504
*
39
L502
L501 c526
| x
13.6 VDC
CONNECTO!
TX 9.5 V
(ZONE 1|-G3)
JU 415
) GRN
c
TX IZV
UNSWITCHED P2
(ZONE |-H5) (ZONE I-G4)
EXCITER SUPPLY
6.8 pF
3.9 pF | 5.6 pF| 6.8pF | 6.8 pF
0300-4399-000 2-6-2 Main Schematic (Sheet 2)
5
= 2413 YEL
474 a4ii MPS
N = 150 | 952-2 7.7/0 AOS J2 2
1 CONTROL TD) £4249 aa (7 ‘ SPKR SPKR
2 = = 41 BOARD | ‘te JACK JACK
F — eV ark [ 27K | \& J501_| P50!
cR409 c468 R448 R4
T 470 10 K 4.7K All
— = TO PIN |
ry OF MIC JACK
E 5 V CR4II crai2 1 TSA 3.2 OHM
2 7X EXTERNAL
SQUELCH Ev iae! a ~ C456 R454 = SPEAKER
CONTROL SQUELCH R446 R451 (-) a4i2 = = . pore
FROM wT 4.9 RIO! 022 36K 4
MICROPROCESSOR 1.2K 4.7K 42/ > ~9/0 10K uF paas
(ZONE 1-F5) ca54 4.9 = voLume |
i +2 pF : CONTROL Fons
H CONTROL BOARD 8
R438 — 1.3
2.2K
R458
BEEP FROM MICRO- ix baied
PROCESSOR /\ AG é rf 1
(ZONE |-E5) =
CR4I4 a] PEAKER JACK
R533 ; es CR4I3 : SI = ER
Tx hes BRN
9.5V ras
CR4I5
SQUELCH TX CONTROLLED
5 C536 = ——————
PA BOARD
SEE SCHEMATIC P303 Ju 402
3! RX INPUT
(ZONE 2-H8)
|
ANTENNA
CONNECTOR
TRANSMIT VOLTAGES IN RED
RECEIVE VOLTAGES IN BLUE
SQ/UNSQ
2-6-2 MAIN SCHEMATIC
704-174B
SHEET 2
«5Ro
SECTION
2
a : |
- , : ,
t een nner,
z ae
c
4
' = r
eae - “—p La
ca
ae x . - ae
7 = ~- 7 f, 4 c“ hey wt 4 ‘ee Ca
ah + bt She
a wy '
7 7 t . i a ~eigpitietos bee a - murs
‘ » i & w
8 1
F ¢ OCR
=f a. a = 1 5 Spay coe
; : wel ” a aha.
set ] “lial ne
; Sia wee Ce ort
les _
#, whe
r i
7 ~ ¥ oF. Ft
1 F -
t
i
7
(aes-# Lo Teg 9 arcane wii | ay
: ¥ ; aay Exe ~ ; <) ee Sees \ at cee nae 9
~ : ' { 80K i ‘ 1 BAST Ren + p ;
i | ie are a " a. = 7 Ad 7
- ae 4 + on — a —— . ~
Se sart ney | toma
b i! | ‘ ;
Sad aaa: Seca ae
het wae | anh Ph
‘
6 mentee ante nan a hee Ga
i ;* i* j q HA eet | reae] “ia janet “ee te
= tr ma a amr a elie .
| \ ; i f ‘
; : 1
mn Fe com cee Oe aoe eee Wee |
GabieM(SReaeS2)
; sctue
RIO3 x 5Vb +5Vc
100 Lay, e RIOT Pion
ate se IoK F G
4 0\yu403 9\wu4i3
wii eee ; ORG. *) ORG.
(pi __RIO4 iF G R542
Ty 00 CH is
Loio2 ety 47K
02 3.8V SWITCHED C
ROS
eo PY (Sa
LOIO3 a) 47K
Qi03
Vn Losz2
RIO6 (NN
oo PY eo RIIO
LDIO4
PRIORITY aes
CRIO! CRIO2 CRIO3
+ I3V
SWITCHED
(¥501 PIN 2) LDI
KEYBOARD 7
aa LAMP
KEYBOARD
KBI
swidl
ae MONITOR
CHANNEL DISPLAY
Ic
CONTROL
["HANG-UP_ MICROPHONE
CLIP HANG-UP BUTTON (O
© PIT
+ 7
= | »d
qdLTAGES
ee") LTAGES
0300-4399-000
I SEND Re
ND MODULUS 5 VDC
CONTROL
“
ae
NOTES;
1. ALL CAPACITOR VALUES ARE PICO FARAD, UNLESS OTHERWISE SPECIFIED
2. ALL RESISTOR VALUES ARE OHMS, |/4 WATT,UNLESS OTHERWISE SPECIFIED.
THIS SCHEMATIC IS USED IN CONJUNCTION WITH:
P.c, BOARD 700-716
ARTWORK 600-921
PARTS PLACEMENT— 600-923
SYMBOLOGY ;
{)_ INDICATES PIN ON Pic. BOARD
(1 so woicares circuit TE POINT
Gypo INDICATES SOLDERED IN JUMPERS
O@PO INDICATES HARDWIRE JUMPERS (USER SELECTED )
AN INDICATES COMMON TIE POINTS
INDICATES BOARD BOUNDARIES
INDICATES OPTION VARIATIONS
PARTS MARKED WITH AN (3) ARE VARIABLE WITH MODEL (SEE PARTS
VARIABLE CHART ).
PART NUMBERS INDICATE LOCATION :
o-99 CHASSIS MOUNTED PARTS
100-199 —— CONTROL BOARD
200-299 —— VCO BOARD
300-399 — PA BOARD
400-499 — RECEIVER BOARD
500-599 — ‘TRANSMITTER /SYNTH (MAIN BOARD )
600-699 — FILTER BOARD
7. DECIPHERING ZONE SYSTEM: (ZONE 2-E4) MEANS SCHEMATIC SHEET
NO. 2 AND ZONE E4.
Ay W504 TO BE INSTALLED IN POSITION OF R540.
37
©/\ ju523
O RX/ TX DRIVE
° (ZONE 2-D8)
ad Fe | Ju508 ‘
12
REFERENCE DESIGNATORS
LAST USED NOT USED
C570
CRSII
clo2 FB501
CRIO3 IC505
DPIO2 J502
LDIO4 L507
Qi04 Q510
Rill R564
S1i03 RTSOI
JU524
YS5Ol
IN RED
IN BLUE
R460, R464
Cc562-6
R558-60, 562,53:
R521,R522
+6-1 MAIN SCHEMATIC
704-174B
SHEET 1
==
SECTION
Z
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SYNTH. DATA =
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c505
Ros O15 uF
%* MODEL SENSITIVE
ee
RH 600 A,B,C 3130-3157-663 3130-6060-316
3130-6105 - 102
Diagrams, Voltage Data, and Schematics
2-6-1 Main Schematic (Sheet 1)
R555
68K
PO yUu506 2. ALL RESISTOR VALUES ARE OHMS, 1/4 WATT, UNLESS OTHERWISE SPEGFIED
ah 6 o 3. THIS SCHEMATIC IS USED IN CONJUNCTION WITH:
ot) BLU P.C. BOARD 700-716
Q506 C547 ARTWORK 600-921
952-2 PARTS PLACEMENT— 600-923
a = FROM MICRO 4. SYMBOLOGY :
(ZONE 1-C5) O INDICATES PIN ON P.C. BOARD
13.8 V SWITCHED
(1 _sowoicares carcurt ne Powr
Oyo INDICATES SOLDERED IN JUMPERS
XTAL HEATER OF PO INDICATES HAROWIRE JUMPERS (USER SELECTED)
Z\ _ INDICATES Common TIE POINTS
C544
Ab
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600-680
IC503
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+9.5V
xo
i IC505
78L08
NOTES:
INDICATES BOARD BOUNDARIES
INDICATES OPTION VARIATIONS
VARIABLE CHART ).
6. PART NUMBERS INDICATE LOCATION ©
o-99 CHASSIS MOUNTED PARTS
100-199 —— CONTROL BOARD
200-299 —- vco BOARD
300-399 — PA BOARD
400-499 — RECEIVER BOARD
500-599 —— TRANSMITTER /SYNTH (MAIN BOARD )
600-699 — FILTER BOARD
7. DECIPHERING ZONE SYSTEM:
NO. 2 AND ZONE E4.
Ay ws04 TO BE INSTALLED IN POSITION OF R540.
TX MOD ENABLE/8
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| SEE VCO SCHEMATIC
604-492 j
R503 Pe a ac. a
TRANSMIT VOLTAGES
RECEIVE
IN RED
VOLTAGES IN BLUE
R460, R464
C562-6
R558-60, 562,5
R521, R522
2-6-1 MAIN SCHEMATIC
704-174B
SHEET 1
-51-
1. ALL CAPACITOR VALUES ARE PICO FARAD, UNLESS OTHERWISE SPECIFIED
5. PARTS MARKED WITH AN (#) ARE VARIASLE WITH MODEL (SEE PARTS
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0300-4399-000 -64- SECTION 2
604-501B
INTERCONNECTION DIAGRAM,
2-6-13
13.6 voc
SPEAKER
INPUT CONNECTOR
ANTENNA
CONNECTOR
JU 419 - WHITE
GND JU420- BLACK =_ Be Fe Se
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JU 517 ~ VIOLET FILTER
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0300-4399-000
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3-1 VCO BOARD
SCHEM.
REF. DESIG. DESCRIPTION PART NUMBER ZONE
INTEGRATED
CIRCUITS
TE201 Prescaler 600-606-F 3130-6060-605 Gs
TRANSISTORS
Q201 MPS AO5 4801-0000-005 A7
Q202 2N5245 FET (graded) 4811-0000-020 C6
Q203 SPS 1473 Red Top 4801-0000-035 She
DIODES
CR201 Varactor MV 1172 4809-0000-00L A7
CR202 Varactor MV 2107 4809-0000-011 Oy:
COILS
L201 4 1/2T shielded coil 1800-5149-711 C6
L202 4.7 uH choke 1803-3268-211 B6
L203 1 uH choke 1803-3268-210 C4
L204 4 1/2T molded choke 1803-5125-902 B4
RESISTORS (All resistors are 1/4W, 5%, carbon film, in ohms.)
R201 22K 4704-0223-032 Ci
R202. 33 4704-0330-032 D7
R203 33 4704-0330-032 eb)
R204 LOK 4704-0103-032 cS
R205 100 4704-0101-032 a3)
R206 270K 4704-0274-032 B6
R207 1K 4704-0102-032 B6
R208 4.7K 4704-0472-032 B5
R209 68 4704-0680-032 B5
R210 180 4704-0181-032 B5
R211 4.7K 4704-0472-032 B7
R2 bz 47K 4704-0473-032 A7
R213 LOK 4704-0103-032 A7
CAPACITORS
C201 lOuF 16V Elect 1513-0100-002 C7
C2ve LOOOpF Cer Disc Da2a-0102~002 C6
203 lOuF 16V Elect 1513-0100-002 CS
*C204 LOOOpF NPO Chip Cap 5 325. 23,1= 103 C4
*Indicates that this part is mounted on the solder side of
the PC Board.
0300-4399-000 ~~ Gils SECTION 3
3-1 VCO BOARD (continued)
REF. DESIG.
C205
C206
C207
C208
C209
C2Lo
Cell
C2ie
C2135
C214
C2i5
C216
C217
C2.8
C2i9
0300-4399-000
DESCRIPTION
1lOpF NPO Cer Disc
470pF
470pF
6.8pF
6.8pF
470pF
470pF
4.7pF
Cer Disc
Cer Disc
NPO Cer
NPO Cer
Tubular
Tubular
NPO Cer
Disc
Disc
Cer
Cer
Disc
1lOOOpF Tubular Cer
1OOOpF Tubular Cer
lOuF 16V Elect
-047uF Tubular Mono
1l2pF NPO Cer Disc
PAIR OS
NPO Cer Disc
LOOOpF Tubular Cer
=68=
PART NUMBER
1500-0100-650
1523-0471-002
1523-0471-002
1500-0689-505
1500-0689-505
1538-0471-601
1538-0471-601
1500-0479-905
1538-O0102-601
1538-0102-601
1513-0100-002
1539-0473-708
1500-0120-605
1500-0229=205
1538-0102-601
SECTION
3
SY
REF. DESIG.
CAPACITORS
Ci 01
CAO?
DIODES
CR101
CR102
GCRLOS
DISPLAYS
DS101
DS102
LD101
LD102
LD103
LD104
TRANS ISTORS
Q101
Q102
Q103
Q104
RESISTORS (All resistors are in ohms,
CONTROL BOARD
DESCRIPTION
1OOOpF, Tubular Cer
~-OluF, Tubular Cer
1N4002
1N4002
1N4002
7-Segment LED
7-Segment LED
LED, red
LED, yellow
LED, yellow
LED, yellow
SPS
SPS
SPS
SPS
ae
LEE
Der ie
D5 2ee 2
PART NUMBER
1538-0102-601
1538-0103-804
4806-0000-004
4806-0000-004
4806-0000-004
2000-3285-600
2000-3285-600
4810-1333-801
4810-1320-501
4810-1320-501
4810-1320-501
4801-0000-016
4801-0000-016
4801-0000-016
4801-0000-016
1/4W, 5%,
unless otherwise indicated.)
R101
R102
R103
R104
R105
R106
R107
R108
R109
R110
R1lll
SWITCHES
SW101
SW102
SW103
0300-4399-000
VAAN VOL.
w/Sw. 103
Var., 10K, Squelch
100
100
100
100
10K
4700
4700
4700
56, 1W, 10% WW
Slide, SPDT, Monitor
Slide, DPDT,
Day/Night
Part of RLOL
—ho—
4750-5194-701
4750-5194-601
4704-0101-032
4704-0101-032
4704-0101-032
4704-0101-032
4704-0103-032
4704-0472-032
4704-0472-032
4704-0472-032
4711-0560-049
Dies 4-0 OL
pio sl o- SUL
L=HS
1-H8
L=-G8
1-G8
Carbon. tilm,
SECTION
3
3-3 FILTER BOARD
REF. DESIG.
INTEGRATED
CIRCUITS
Ic60l
TRANSISTORS
Qé6o0l
Q602
Q603
DIODES
CR601
CR602
DESCRIPTION
Quad Op Amp LM 2902
SPS
SPS
SPS
Sili
Siti
Doan 4
952-2
95 256
con 1N4148
con 1N4148
PART NUMBER
S120-SL00—637
4801-0000-016
4801-0000-016
4801-0000-016
4805-1241-200
4805-1241-200
Ci
D5
C4
Cs
CS
C4
RESISTORS (All resistors are 1/4W, 5%, carbon film, in ohms.)
R601
R602
R603
R604
R605
R606
R607
“R608
R609
R610
R611
R612
R613
R614
R615
R616
R617
R618
R619
R620
R621
R622
R623
R624
R625
R626
R627
R628
R629
R630
R631
0300-4399-000
bak
100K
22K
6.8K
Not
22K
30K
130K
8.2K
22K
15K
56K
Lk
3.6K
150K
43K
33K
68K
22K
220K
2.2K
LOK
3.9K
36K
LOK
470
12K
6.8K
LOK
4.7K
100
used
dhty Te
4704-0123-032
4704-0104-032
4704-0223-032
4704-0682-032
4704-0223-032
4704-0303-032
4704-0134-032
4704-0822-032
4704-0223-032
4704-0153-032
4704-0563-032
4704-0122-032
4704-0362-032
4704-0154-032
4704-0433-032
4704-0333-032
4704-0683-032
4704-0223-032
4704-0224-032
4704-0222-032
4704-0103-032
4704-0392-032
4704-0363-032
4704-0103-032
4704-0471-032
4704-0123-032
4704-0682-032
4704-0103-032
4704-0472-032
4704-0101-032
C8
C8
C8
7.
C7
Cy
D7
B8
B8
By
B7
By.
B6é
Bo
Co
C6
C6
C6
D6
D5
D5
C4
D4
D4
C4
C4
C3
D3
B4
D6
SECTION
3
3-3 FILTER BOARD (continued)
REF. DESIG.
CAPACITORS
C601
C602
C603
C604
C605
C606
C607
C608
C609
C610
colE
CoLZ
C613
C614
C615
C616
Col
C618
C619
C620
C621
C622
C623
C624
Co25
C626
C627
C628
0300-4399-000
DESCRIPTION
150pF Cer Disc
150pF Cer Disc
-068uF Mylar
~-O15uF Mylar
-2uF Cer Disc
~-O15uF Mylar
-O15uF Mylar
-OluF Mylar
-2uF Cer Disc
Not used
-O15uF Mylar
l0OuF 16V Elect
3900pF Mylar
~O015uF Mylar
-O15uF Mylar
-OluF Mylar
100uF 10V Elect
-068uF Mylar
150pF Cer Disc
LOOOpF Mylar
luF 50V Elect
150pF Tubular Cer
luF 50V Elect
lOuF 16V Elect
150pF Cer Disc
150pF Cer Disc
-O5uF Cer Disc
~-OOluF Cer Disc
le
PART NUMBER
1523-0151-002
1523-0151-002
1508-0683-610
1508-0153-510
1502-0204-006
1508-0153-510
1508-0153-510
1508-0103-510
1502-0204-006
1508=0153—510
Lo LseOULUUuS UO
TOUGzU a etal
1908201532510
L908 =0153~510
1508-0103-510
1913=3254-742
1508-0683-610
LazseUlol—002
1508-0102-510
1513-0010-004
1538-0151-601
1513-0010-004
LeU =U 2
Lo2eaw Lo. U2
LeJeU Luau 2
1502-0503-003
152520 L02-002
SECTION
3
3-4
REF. DESIG.
TRANSISTORS
Q301
Q302
Q303
Q304
Q305
DIODES
CR301
CR302
CR303
CR304
COILS
L301
L302
L303
L304
L305
L306
L307
L308
L309
L310
THERMISTOR
RT301
RELAYS
RY301
RESISTORS (All resistor
R301
R302
R303
R304
R305
R306
R307
R308
0300-4399-000
PA BOARD
DESCRIPTION
MRF 237
MRF 261
MRF 245
MPS AO5
MPS AO5
PIN 9401
PIN 9401
1N4148
zener 8.2V
4 1/2T molded choke
1 1/2T ferrite choke
7 1/2T molded choke
1 1/2T ferrite choke
5T Air wound
.66 uH molded choke
5 1/2T molded choke
2 1/2T Air wound
2 1/2T Air wound
2T ferrite choke
Thermistor
Relay SPST 30A
100 carbon comp 1/4W 10%
120 WW 2W 53%
56K carbon film 1/4W 5%
100 carbon comp 1/4W 10%
470 carbon film 1/4W 53%
22 carbon film 1/4W 5%
100 carbon comp 1/4W 103%
180 carbon film 1/4W 5%
a)
PART NUMBER
4804-3169-608
4804-3411-805
4804-3269-801
4801-0000-005
4801-0000-005
4815-3408-601
4815-3408-601
4805-1241-200
4808-0000-027
T803=5125-902
2502-0000-002
1G 3e5 125-7.
2502-0000-002
1803-3269-000
1803-5125-9172
L603—5125—-905
1801-3407-702
1801-3407-702
2502-3254-101
5300-0000-004
4500-5476-700
values are in ohms.)
4700-0101-042
4710-0121=031
4704-0563-032
4700-0101-042
4704-0471-032
4704-0220-032
4700-0101-042
4704-0181-032
SCHEM.
C4
ers)
SECTION
_ZONE_
3
3-4 PA BOARD (continued)
REF. DESIG.
CAPACITORS
C301
C302
C303
C304
C305
C306
“C307
C308
C309
*C3L0
Cart
CS2
Cabs
*C314
C315
C316
C317
Cale
C319
C320
C321
C322
C323
C324
C325
C326
FCS 2H
C328
C329
C330
C3 3a
6352
C333
C334
€C335
CI36
C337
C333
C339
DESCRIPTION
82pF NPO Cer Disc
4-60pF Mica Trimmer
Not used
91pF NPO Cer Disc
LOOOpF Cer Disc
-OluF Cer Disc
330pF Cer Chip
33pF Cer Chip
82pF Cer Chip
1LOOOpF NPO Cer Chip
l00uF 16V Elect
-OluF Cer Disc
LOOOpF NPO Cer Chip
lLOOOpF NPO Cer Chip
100uF 16V Elect
1LOOOpF Cer Disc
39pF Cer Chip
LOOpF Cer Chip
4-60pF Mica Trimmer
1O000pF Cer Disc
lOOuF 16V Elect
-OluF Cer Disc
Not used
1O00pF Mica
4-60pF Mica Trimmer
40pF Mica
LOOOpF NPO Cer Chip
62pF Mica
-OluF Cer Disc
Not used
18pF Cer Disc
56pF Mica
40pF Mica
2.2pF NPO Cer Disc
LOOOpF NPO Cer Chip
-OluF Cer Disc
350pF Mica
27pF Mica
LOOOpF NPO Cer Chip
PART NUMBER
1524-0820-002
1517-0000-002
1500-0910-550
1503-0102-001
1503-0103-007
1540-0331-606
1540-0330-605
1540-0820-605
ES53=52372~-703
1513-0101-002
1503=0103-007
£55375 23' 7-703
Los3e52514~708
£5135=0101-002
1503-0102-001
1540-0390-605
1540-0101-606
1517-0000-002
I50s—0102-001
Los —-OLOU—002
1503-0103-007
1522-0102-002
1517-0000-002
1522-0400-006
to Dotessi—~/02
1528 -5418-305
1503-0103-007
1500-0180—-505¢
15:22—-0560-007
1522-0400-006
PI0G=0 229.305
USI8S5 231-703
ES0S>01L03=—007
Pa22-0 3512-007
U5 220270=006
Disa 231-7 05
SCHEM.
*Indicates that this part is mounted on the solder side of
the PC Board.
0300-4399-000
os ee oe
SECTION
_ZONE_
2
3-5 MAIN BOARD, RECEIVER SECTION
REF. DESIG.
CAPACITORS (All capacitors are
DESCRIPTION
indicated.)
C401
C402
C403
C404
C405
C406
C407
C408
C409
C410
C411
C412
C413
C414
C415
C416
C417
C418
C419
C420
C421
C422
C423
C424
C425
C426
C427
C428
c429
C430
C431
C432
C433
C434
C435
C436
C437
C438
C439
C440
C441
C442
C443
C444
C445
C446
0300-4399-000
45] are) 50V; bYCLC
Hear, 50V, Lytic
A7GEs SoV,7 LYCLC
aoTQE) 35V;, Lytic
100uF, 10V, Lytic
2200, 50V, 103%
1000, 50V, 10%
~OluF, 25V
470, 50V, 10%
SOLUS 25V
470,~50V,. 10%
6.8, 50V, 10%, NPO
47, 10%
8.2, 50V, 10%,NPO
-OluF, 25V
2.2, 10%, NPO
5-6, 50V,. 10%, NPO
39, 10%
842 ,,.50V - 210% ,. NPO
39, 50V, 53%
a0 4h 225V
AnD, 50V.,, LO%
470, 50V, 10%
6.8, 50V, 10%, NPO
£39," 10%
6.8.,. 50V.,,. 10%, NPO
sOLuP, 25V
~OLury, 25V
L0ur;* 16V, Lytic
3.9, 500V
SOLE, 25V
LOWE +16, Lytic
-OluF, 25V
68, 50V, 5%, NPO
150;),.50V, 10%
22UF pn LOVe, HLYGLC
20-505... ov
O5UF.y. i 46V
-O047uF, 50V
3:9 ,. SOOV.
L500); SOV on LOS
1000:,. 50V;, 10%
~4/UF, 50V,) Lytic
4700," 50V, 10%
LFA tn
in pF unless otherwise
SCHEM.
PART NUMBER ZONE
1513-0050-004 1-G4
1513-0050-004 1-G4
1513-0479-006 1-E4
1502-0503-003 L=E5
1513-0479-006 1-E5
154343254-730 i=G>
1538-0103-804 Jere eta)
1538=0222-706 1=-E5
1538-0102-601 2-58
1538-0103-804 2-F8
1536-0471-601 2287
1538-0103-804 2-G8
1538-0471-601 Ze
1538-0689-608 2~P 7
1510-0478-900 25F7
1538-0829-608 2=F 7
1538-0103-804 2-87]
1538-0229-608 2-88
1538-0569-608 2-G8
1510-0398-900 2-9
1538-0829-608 2-G8
1538-0390-508 2-G8
1538-0103-804 25H8
1538-0471-601 4-a]
1538-0471-601 deh
1538-0689-608 2-G7
1510-0398-900 2-Gi
1538-0689-608 Fre: 8
1538-0103-804 Anns
1538-0103-804 2=H6
1513+0100-002 2-H6
1$00.=0399=205 2-G6
1538-0103-804 Cony
1513-0100-002 207
1538-0103-804 2-G6
1538-0680-509 2-5
P56 3R05 1-60 2415
1512-0220-002 2-6
150 250503-003 2-H6
1502-0503-003 2-5
1539-0473-708 2-15
1500-0399-205 2-G6
1538-015 0-607 22G5
L530-01L02-60L 2-G5
1513=3302-005 2-Go
1538-0472-626 2-Go
SECTION: ‘3
)
3-5 MAIN BOARD, RECEIVER SECTION (continued)
REF. DESIG.
C447
C448
FILTERS
CF401
DIODES
CR401
CR402
CR403
CR404
CR405
CR406
CR407
CR408
CR409
CR410
CR411
CR412
CR413
*Indicates that this part is mounted on the solder side
DESCRIPTION
1000;,1°50v.,4 103%
S2AP SOV , 415%
1000, 50V, 103%
uO 2 50 Velo
LOO00,°50V, 10%
SOUL Lev.
220050 50V7, 1.0%
eour,« L2V
Seulr,& L2V
S022ur, 25V
2200, 100V, 5%, Mylar
vOMaiks, 25
Lor. 12V.
lLOOuF, 10V, Lytic
WOour, 25V
220uF, 16V, Lytic
lO00OuF, 16V, Lytic
-47uF, 50V, Lytic
ural L2V
Stirs. SOV
470, 50V
470, 50V
LO00; H50V
47uF, 1OV, Lytic
150, 50V
Not used
1505 50V
oo; 50V
Ceramic, 455 KHz
Silicon
Silicon
36V, Zener, 5%
Silicon
Silicon
Not used
Germanium
Silicon
Silicon
Silicon
Germanium
Germanium
Silicon
of the PC Board.
0300-4399-000
-75-
PART NUMBER
1538-0102-601
1538-0820-517
1538-0102-601
1538-0102-601
1538-0102-601
1502-0204-006
1538-0222-706
1502-0204-006
1502-0204-006
1538-0223-805
1508-0222-510
1538-0103-804
1502-0104-005
1513-3254-730
1502-0503-004
1518=-3254=711
1513-3254-704
1513-3302-005
1502-0104-005
1539-0104-908
1523-0471-002
1538-0471-601
19123-0102-002
1513-3254-727
1523-0151-002
1523-0151-002
1523-0151-002
2700-3209-500
4805-1241-200
4805-1241-200
4808-0000-053
4805-1241-200
4805-1241-200
4807-1233-900
- 4805-1241-200
4805-1241-200
4805-1241-200
4807-1233-900
4807-1233-900
4805-1241-200
SCHEM.
2-G4
2=Go
2-G4
2-G4
2-G4
2=G3
2-G3
2-F4
2=G3
2-F2
2=i2
2-E2
2a re
2=E2
2=E 2
FZ
2-F2
2=F2
2=FZ
=
L=G7
2=F5
2oK/
1-D4
JB 3
2-G4
2-F4
SECTION
ZONE
3
3-5 MAIN BOARD, RECEIVER SECTION (continued)
REF. DESIG. DESCRIPTION
CR414 Silicon
CR415 Silicon
INTEGRATED
CIRCUITS
IC401 EAROM, Memory
IC402 Memory Buffer
Ic403 Microprocessor
IC404 BCD to 7-Segment Driver
Ic405 IF Amp, Second Mixer,
IC406 Audio Amp
COILS /CHOKES
L401 Coil, Orange, 4 1/2T
L402 Coil, Orange 4 1/2T
L403 Cois,. Pink, 4 .1/2T
L404 Coil, Green, 4 1/2T
L405 Coil, Green, 4 1/2T
L406 Cor; Green}? 4 1/2T
L407 Coil, 10.7 MHz
L408 Choke, 39 uH
L409 Cord;"'455. KHZ
*L410 Choke, 4.7 uH
TRANSISTORS
Q401 NPN
Q402 NPN
Q403 NPN
Q404 Not used
Q405 Not used
Q406 NPN
Q407 NPN
Q408 NPN, Red Top
Q409 NPN, Red Top
Q410 JFET
Q41l NPN
Q412 PNP, White Top
Q413 NPN
*Indicates that this part is mounted on the solder side
of the PC Board.
0300-4399-000
7.6—
SCHEM
PART NUMBER ZONE
4805-1241-200 2-E2
4805-1241-200 2-E2
3130-3157-663 1-F4
3130-3193-533 1-F5
3130-6060-316 1-E6
3130-3193-531 1-D7
3130-6056-500 2-HS
3130-5407-602 2-F2
1800-3152-020 2-G8
1800-3152-020 2-G8
1800-3152-036 2-G7
1800-3152-037 2-G7
1800-3152-037 2-F7
1800-3152-037 2-F7
1800-6055-902 2-Gé6
1803-3268-201 2-G6
1800-6055-801 2-H4
1803-3268-211 1-G5
4801-0000-005 1-G4
4801-0000-005 1-F4
4801-0000-005 1-E4
: 1-D5
1-D5
4801-0000-016 1-C5
4801-0000-016 1-C7
4801-0000-035 2-F8
4801-0000-035 2-G7
4811-0000-030 2-Gé6
4801-0000-016 2-F3
4801-0000-060 2-F4
4801-0000-005 2-F3
SECTION 3
ee 3-5 MAIN BOARD, RECEIVER SECTION (continued)
SCHEM
REF. DESIG. DESCRIPTION PART NUMBER ZONE
RESISTORS (All resistors are in ohms, 1/4wW, 5%, unless
otherwise indicated.)
R401 390 4704-0391-032 1-G4
R402 1200 4704-0122-032 1-G4
R403 1000 4704-0102-032 1-E4
R404 820 4704-0821-032 1-E4
R405 4700 4704-0472-032 1-E5
R406 4700 4704-0472-032 1-C6
R407 100 4704-0101-032 1-C7
R408 100 4704-0101-032 1-C7
R409 100 4704-0101-032 1-D7
R410 100 4704-0101-032 1-D7
R411 100 4704-0101-032 1-D7
R412 100 4704-0101-032 1-D7
R413 100 4704-0101-032 1-D7
R414 100 4704-0101-032 1-C7
R415 100 4704-0101-032 1-C7
R416 22K 4704-0223-032 1-c5
R417 15K ; 4704-0153-032 1-F5
R418 Not used 1-D5
R419 Not used 1-D5
@ R420 Not used 1-D5
R421 4700 4704-0472-032 1-C5
R422 1000 4704-0102-032 1-F5
R423 2700 4704-0272-032 2-F8
R424 8200 4704-0822-032 2-F8
R425 390 4704-0391-032 2-F8
R426 100 4704-0101-032 2-G8
R427 100 4704-0101-032 2-G7
R428 1000 4704-0102-032 2-F7
R429 8200 4704-0822-032 2-G8
R430 680 4704-0681-032 2-G7
R431 8200 4704-0822-032 2-H7
R432 100 4704-0101-032 2-H7
R433 100 4704-0101-032 2-H7
R434 100 4704-0101-032 2-H6
R435 100 4704-0101-032 2-H7
R436 470 4704-0471-032 2-H6
R437 100 4704-0101-032 2-G5
R438 2200 4704-0222-032 2-E5
R439 180K 4704-0184-032 2-G5
R440 47K 4704-0473-032 2-G5
R441 330K 4704-0334-032 2-G5
R442 1000 4704-0102-032 2-G4
R443 68K 4704-0683-032 2-H4
R444 13K 4704-0133-032 2-G4
R445 L3K 4704-0133-032 2-G4
> R446 1200 4704-0122-032 2-F4
. R447 8200 4704-0822-032 2-G4
R448 1OK 4704-0103-032 2-F3
0300-4399-000 yam SECTION 3
3-5 MAIN BOARD, RECEIVER SECTION (continued)
REF. DESIG.
R449
R450
R451
R452
R453
R454
R455
R456
R457
R458
R459
R460
R461
R462
R463
R464
R465
TRANSFORMER
T401
CRYSTAL
FILTERS
XF401
XF 402
CRYSTALS
Y401
Y402
0300-4399-000
DESCRIPTION
4700
180 1/2W
Not used
Not used
Drum/Ring
10.7 MHz
10.7 MHz
34579) MHZ
10.245 MHz
ste
PART NUMBER
4704-0472-032
4704-0683-032
4704-0472-032
4704-0272-032
4704-0472-032
4704-0363-032
4704-0122-032
4704-0279-032
4704-0181-034
4704-0109-032
4704-0681-032
4704-0243-032
4704-0163-032
4704-0563-032
4704-0471-032
5604-5151-200
2705-3232-200
(matched pair)
2342-3284-400
230465 151-602
SECTION 3
3-6 MAIN BOARD, TRANSMITTER
REF. DESIG.
C501
C502
C503
C504
C503
C506
Co0g.
C508
C509
C510
Cond
CoiZ
C513
C514
Bales)
C516
ois
C518
C519
C520
C527
C522
C526
C524
C525
C526
C527
C423
C529
C530
C531
C532
C533
C534
C535
C536
€537
C538
E569
C540
C541
C542
C543
C544
C545
C546
C547
0300-4399-000
DESCRIPTION
150, 50V, 103%
-Ol5uF, 100V, 5%, Mylar
SO 22UF pao 25),
e2ZUP, 4 12V
-O15uF, 100V, 5%, Mylar
4700, 100V, 5%, Mylar
470, 50V
lOuF, 16V, Lytic
-O15uF, 100V, 5%, Mylar
1000, 100V, 5%, Mylar
e2UF: A2y.
4907 550V,-.10%
1000, 500V
470, 50V, 103%
10uF, 16V, Lytic
LO00uF, 16V, Lytic
~-O1l5uF, 100V, 5%, Mylar
~-22uF, Mylar
470, 50V
-Ol5uF, 100V, 5%, Mylar
470, 50V, 103%
6585; 50V4,n 10%, NPO
AIO, SOVes 10%
470, 50V, 103
47058 50V, 10%
8266) 50V5e10%5 NPO
75958 103
6eG5R50V, 10%, NPO
329968 50V, 10%, NPO
LOOuF, 16V, Lytic
L000 « 50V7i 20%
470, 50V
470, 50V, 103%
62378 50V, 10%, NBO
ae 10%
6:8, 50V, 10%, NPO
226850, 5%, NPO
a20G, SOV, 5%, NPO
470, 50V
-O5uF, 16V
47uF, 1OV, Lytic
s050F, 16V
5679 50% -5%.- NPO
244050V% 5%, NPO
3-12, Trimmer
4eHUE, 25V, Lytic
1000, 50V
19 —
CAPACITORS (All Capacitors are in pF unless otherwise
SCHEM.
PART NUMBER ZONE
1538-0151-601 1-A6
1508-0153-510 1-B6
1538-0223-805 Ve 5)
1502-0204-006 1-c4
1508-0153-510 £1-c4
1508-0472-510 1-C4
1523-0471-002 1-B4
1513-0100-002 1-B4
1508-0153-510 1-B4
150840102-510 L325
1502-0204-006 LocsS
1538-0471-601 i-G3
1503-0102-001 1-D4
1538-0471-601 TS 852)
1513-0100-002 1-c4
1513-3254-704 1-D4
1508~-0153-510 1-D4
1508-3300-302 1-D4
1523-0471-002 1-c4
1508-0153-510 L-€S
1538-0471-601 2=D8
1538-0689-608 2-D8
1538-0471-601 27G0
1538-0471-601 2=D7
1538-0471-601 2=C7
1538-0339-608 Z-D7
1510-0398-900 Z=Dg
1538-0689-608 2-0
1538-0399-608 2-D7
1513-0101-002 Pind OF
1538-0102-601 2=C6
1523-0471-002 2-D6
1538-0471-601 2-D6
1538-0689-608 2-D6
1510-0478-900 2-D6
1538-0689-608 2-D5
1538-0220-508 2205
1500-0399-205 27D5
1523-0471-002 2=D5
1502-0503-003 2=D5
LSl3-8254=77 27 1-E2
1502-0503-003 i-G2
1538-0560-509 L-FS
1538-0270-508 L-FS
L530 Jr 5i-5 52001 LFS
1513-0479-006 lar F2
1523-0102-002 1=-F3
SECTION 3
3-6 MAIN BOARD, TRANSMITTER (continued)
REF. DESIG.
C548
C549
Ca79
cook
C552
C559
c554
Coo
C556
C557
C558
C559
C560
C561
Bus fogs
C563
C564
C565
C566
=C567
*E>6e
= C569
C50
DIODES
CR501
CR502
CR503
CR504
CR505
CR506
CR507
CR508
CR509
CR510
CRouL
FERRITE
BEADS
FB501
DESCRIPTION
1000, 50V, 10%
luF, 50V, 10%, Lytic
470uUE, 6.3V, bY
luF, 50V, Lytic
1000, 50V
1000, 50V,
1000, 50V,
-OS5SuF, 16V
10uF, l6V,
1lOuF, 16V,
1000, SOV,
470, 50V
10%
10%
Lyti
Lyti
10%
tic
Cc
Cc
220uF, 16V, Lytic
470, 50V
Not used
Not used
Not used
Not used
Not used
150, 50V
150),° 50V
1507 >50V
Not used
Silicon
Silicon
Germanium
Germanium
Silicon
Silicon
Silicon
Silicon
Silicon
Silicon,
Silicon
3 Amp
Ferrite Bead w/leads
PART NUMBER
1538-0102-601
1513-0010-004
1$13=3254-709
1513-0010-004
1523-0102-002
1538-0102-601
1538-0102-601
1502-0503-003
1513-0100-002
1513-3302-004
1538-0102-601
1523-0471-002
1513-3254-711
1523=0471-002
1523-0151-002
1523-0151-002
1528-0151-002
4805-1241-200
4805-1241-200
4807-1233-900
4807-1233-900
4805-1241-200
4805-1241-200
4805-1241-200
4805-1241-200
4805-1241-200
4806-0000-013
4805-1241-200
2502-3293-902
*Indicates part is mounted on the solder side of the
PC Board.
0300-4399-000
aAQ=
SCHEM.
ZONE
1-G3
1=G3
1-G2
i-HS
1-H4
1G?
1=G2Z
1-3
1=H3
l-H3
1-G3
1-F4
1-85
td
SECTION. 3
&
R501
R502
R503
R504
R505
R506
R507
R508
R509
R510
R511
R512
R513
R514
Robo
R516
3-6 MAIN BOARD, TRANSMITTER (continued)
REF. DESIG. DESCRIPTION
INTEGRATED
CIRCUITS
LCS On Quad OP Amp
tC502 Low Noise OP Amp
1C503 CMOS Synthesizer
Ic504 5V Regulator, 1 Amp, 5%
IC5G5 8V Regulator, 53%
COILS
L501 Coil, Yellow, 4 1/27
L502 Coil, Orange, 4 1/2T
L503 Coil, Orange, 3 1/2T
L504 Coil, Orange, 4 1/2T
L505 Coie eB Lu, a6 1/2)
L506 Coat, Natural, 10 1/2 °T
L507 Choke, 3.3 mH
TRANSISTORS
Q501 NPN, Red Top
Q502 NPN, Red Top
Q503 NPN, Pre-driver
Q504 Darlington
Q505 PNP, White Top
Q506 NPN
Q507 NPN
Q508 PNP, White Top
Q509 NPN
Q510 PNP
otherwise indicated.)
470
36K
470K
30K
330K
4700
22K
22k
15K
2700
2100, 2%
BoO00 7 2s
22K
12K
15K
10K, variable
0300-4399-000 woke ies
RESISTORS (All resistors are in ohms, 1/4W, 5%, unless
SCHEM.
PART NUMBER ZONE
Si 3ia3157=6 37 (heen)
3130-5483-700 L=C4
3130-6068-000 LE 3
3130-0000-022 LHS
3130-0000-021 eer
1800-3152-035 2-D7
1800-3152-020 2707
1800-3152-034 2-D6
1800-3152-020 2-D6
1803-5125-909 2-05
1803=-5125-912 2=D5
1803-3268-212 i=D3
4801-0000-035 2-D8
4801-0000-035 2-D6
4801-0000-030 Za
4814-3449-700 heed oS
4801-0000-060 E=G3
4801-0000-016 L=i3
4801-0000-016 1—G2
4801-0000-060 1-G3
4801-0000-016 Lars
4801-0000-001 1-G4
4704-0471-032 L=C6
4704-0363-032 L=3B6
4704-0474-032 LCs
4704-0303-032 Nh ole
4704-0334-032 Co
4704-0472-032 Les
4704-0223-032 Jim Os
4704-0223-032 1-c4
4704-0153-032 1-c4
4704-0272-032 1-c4
4704-0272-022 1-B4
4704-0362-022 1-B4
4704-0223-032 T=Ce
4704-0123-032 1-c4
4704-0153-032 1-cC4
4751-0103-001 1-B3
SECTION
3
3-6 MAIN BOARD, TRANSMITTER (continued)
REF. DESIG.
ean e
R518
R519
R520
R521
the prea
R22
R524
R525
R526
R527
R528
R529
R530
Ross
R532
R533
R534
ROJO
R536
|S
R538
R539
R540
R541
R542
R543
R544
R545
R546
R547
R548
R549
R550
R551
R552
R553
R554
R555
R556
R5De/
R558
R559
R560
R561
R562
R563
R564
0300-4399-000
DESCRIPTION
10K
47K
22K
47K
Not used
Not used
2200
100, 2W, 5% WW
3.9, 5W, 10%, WW
10K
Not used
Not used
Not used
10K, variable
Not used
470
10
of
SCHEM.
PART NUMBER ZONE
4704-0103-032 L—C3
4704-0473-032 L=03
4704-0223-032 L-C3
4704-0473-032 L-CS
4704-0562-032 1-C4
4704-0682-032 1-c4
4704-0223-032 1-D4
4704-0103-032 1-c4
4704-0390-032 1-D4
4704-0222-032 2-D8
4704-0103-032 2-5
4704-0221-032 2-C3
4704-0101-032 Fi G4
4704-0100-032 2-Ci
4704-0222-032 2-53
4704-0122-032 2-D6
4704-0682-032 2-1
4704-0390-032 2-D6
4704-0100-032 2-D6
4704-0560-032 2-05
4704-0103-032 LE 2
4704-0103-032 2
4704-0109-032 aes 3
4704-0122-032 1-F4
4704-0279-032 I=F3
470 7=0101~031 Loko
4704-0222-032 L=G3
4704-0103-032 T=ia3
4704-0822-032 i=G2
4704-0103-032 l=Fe
4704-0222-032 L=G2
4707-0399-043 1=H3
4704-0103-032 L-GzZ
4704-0222-032 Ne
4704-0103-032 Be) yr
4704-0683-032 t=Fs
4704-0122-032 1-Go
4704-0103-032 dio
4751-0103-001 oe
4704-0471-032 2-D8
4704-0100-032 1=G3
SECTION 3
3-6 MAIN BOARD, TRANSMITTER (continued)
SCHEM.
REF. DESIG. DESCRIPTION PART NUMBER ZONE
THERMISTOR
RT501 Thermistor 5300-0000-001 1-F4
CRYSTAL
Y501 10.240 MHz 2338-3300-501 dD ee
0300-4399-000 =38 = SECTION
3
Only the components listed vary from the "B" model Parts
FREQUENCY SENSITIVE PARTS -
ipl = Yi
MODEL
List given in Sections 3-1 through 3-6.
REF. DESIG.
C205
C208
C202
L201
Cou.
C304
C326
ox ie
C333
C356
L309
C414
C416
C419
C421
C426
C428
C526
C528
Cozd
C534
C536
oa ie
CasG
0300-4399-000
DESCRIPTION
Not used
22DE pL OU;
22pF,. 50V,
5%
5%
coil
91pF,
1OOpF,
LOOpF,
60pF,
56pF,
33DF;
50V,
50V,
250V,
250V,
250V,
250V,
5%
5%
10%, Mica
5%, Mica
10%, Mica
5%, Mica
3T Airwound
SU 2DE;
LOpF,
6.8pF,
LOpF,
SC 2ZDE,
8.2pF,
50V,
50V,
50V,
50V,
50V,
50V,
10%
5%
10%
5%
10%
10%
4.7pF,
LODE,
4.7pF,
LOpF,
8.2pF,
27pF,
6.8pF
50V, 10%
50V, 5%
50V, 10%
50V, 5%
50V, 10%
50V, 5%
—24h—
PART NUMBER
1500 70220-5590
1500-0220-550
1800-5149-706
1500-0910-550
1500-0101T-505
t522-0107-007
1522-0600-006
1522-0560-007
1522-0330-006
1801-3460-900
1538-0829-608
1538-0100-508
1538-0689-608
1538-0100-508
1538-0829-608
1538-0829-608
1538-0479-608
1538-0100-508
1538-0479-608
1538-0100-508
1538-0829-608
1538=0270=508
1500206892505
SCHEM.
ZONE
C7
C6
CS
C6
SECTION
3
3-8
FREQUENCY SENSITIVE PARTS -
vl ge!
MODEL
Only the components listed vary from the "B" Model Parts
List given in Sections 3-1 through 3-6.
REF. DESIG.
C205
C27
Cou
C304
C309
C328
Caae
G3a0
C414
C415
C416
C419
C426
C427
C428
L401
L402
C526
C528
C534
Seals
CS37
*C570
L504
DESCRIPTION
6.8pF,
10pF,
68pF,
82pF,
56pF,
56pF,
CON ls
CoOL,
Pas Tel ore
30 DE
5 ODE,
Si2DE,
6.8pF,
22DEy
corr,
500V, 5%
50V,
SOV),
50V,
Mica
Mica
Mica
Mica
50V,
10%
50V,
50V,
50V,
10%
50V,
red
red
50V,
red
10%
5%
5%
5%
PART NUMBER
1500-0689-505
1500-0100-650
1524-0680-002
1524-0820-002
1522-0560-007
1522-0560-007
1522-0400-006
1522-0200-006
1538-0569-608
1510-0398-900
1538-0689-608
1538-0689-608
1538-0569-608
1510-0338-900
1538-0569-608
1800-3152-002
L800—3152-002
1538=-0270=5908
1538-0569-608
1538-0569-608
2>39-0829-008
1538-0689-608
1500-0220-550
L600 —305 2-00 2
SCHEM.
ZONE
*Indicates that this part is mounted on the solder side of
the PC Board.
0300-4399-000
Sa5—
SECTION 3
3-9 PARTS VARIABLE CHANNEL
REF. DESIG.
CR406
Ic401
Ic 403
Q404
Q405
R412
R419
R420
C470
0300-4399-000
DESCRIPTION
Zener, 6.8V
EAROM
Microprocessor
Transistor, NPN
Transistor, NPN
Res. 1.2K, 5%, 1/4W
Res. 1.2K, 5%, 1/4W
Res. lOK, 5%, 1/4W
Not used
£6 -
(ALL MODELS )
PART NUMBER
4804-0000-042
3130-1355=200
3130~6105—i102
4801-0000-016
4801-0000-016
4704-0122-032
4704-0122-032
4704-0103-032
SECTION
3
(2)
@
SECTION 3
-87-
0300-4399-000
3-9 PARTS VARIABLE CHANNEL (ALL MODELS)
REF. DESIG.
CR406
Ic401
Ic403
Q404
Q405
R413
R419
R420
C470
0300-4399-000
DESCRIPTION
Zener, 6.8V
EAROM
Microprocessor
Transistor, NPN
Transistor, NPN
Res. 1.2K, 5%, 1/4W
Res. 1.2K, 5%, 1/4W
Res. lOK, 5%, 1/4W
Not used
=86-
PART NUMBER
4804-0000-042
3130-1355-200
3130-6105-102
4801-0000-016
4801-0000-016
4704-0122-032
4704-0122-032
4704-0103-032
SECTION
Ss
p/p
| [
LU
@) @) @@®
an
WS
Se,
&) ®) O®
I
) b)
SECTION 3
-87-
3-10 EXPLODED VIEW
0300-4399-000
us
oe
=)
pa
aS
h
3
ti
Y % ~
: ‘ .
? é : ;
*, -”
* / < } >
« :
er =
» :
» > A ~
~~ Py 5 j 4
. a
- i * , Oi
i. . a i
e a “ ¥
ma f
P #
A
MMEDED VIEW
»
.
}
ih an
MS alle ae
=).
os has
= 26
+
i
o
7
(¢
.
&
y/
3-11 MECHANICAL PARTS
EXPLD. VIEW
REF. NO.
cr
C2,3,4,5
2
0300-4399-000
DESCRIPTION
-OO0luF Feedthru cap
150pF Cer Disc cap
Control Knob
Front Panel - black
Front Panel - brown
Keyboard
Display Lens
Plastic Washer
Plastic Washer
Screw
Plastic Bushing
Paper Mask Insulator
Ribbon Cable - 9 cond.
Ribbon cable - 14 cond.
Keyboard Light Panel
Light Bulb Assembly
Front Panel Bracket
Screw
Screw
Bottom Shield
Case Bottom - Gray
Case Bottom - Beige
Case Screw
Case Screw
Screw
Main Chassis
Cable Tie
Mic Connector
Mounting Bolts
Lock Washer
Flat Washer
Plastic Washer
Screw
Spacer
Screw
Socket, 14-pin
Socket, 10-pin
Socket, 9-pin
Cable Clip
Cable Clip
Shield Can
Nut
Screw
Crystal Clip
PA Shield Cover
PA Shield
Screw
Screw
90° connector, 3-pin
—oO—
PART NUMBER
152155129-800
1523-0151-002
2402-6067-203
1411-7059-810
1411-7059-813
2001-6066-706
3900-5 156-007
28 44-1812-774
2844-1315-302
2811-3185-600
2501-3450-100
2514-3308-800
6008-3300-006
6008-3300-003
1411-6065-402
10 Dial 28 1-000
1400-7060-600
2808-0250-030
2816=-53229-601
2508-6428-501
1411-7053-014
1411-7053-009
2809-0 312-012
2816=-3298-702
2808-0250-034
1403-7417-800
6005-3457-001
2105-0000-023
2806-0625-028
28 41-0000-001
2840-3191-909
2844-6070-701
2807-3298-001
Z2800—1325-701
2803-0312-001
2105=3299-—202
2105-3354-801
2105 =3299—=205
6002-3457-101
6002-3457-501
2508-1288-901
2852-0440-001
2811-3185-600
2830-6073-500
2508-6445-402
2508-6445-300
2823-0250-042
2823-0312-042
2109=3345-502
QTY
USED
SECTION
ae Or Nae
PNORPEFPHPYUNADNEPRPRPEPNNUNNNNEPNEPWRBH PRP URPPRPRPRPRENNNNEE
3
3-11 MECHANIC
EXPLD.
REF. NO.
0300-4399-000
AL PARTS (continued)
VIEW
DESCRIPTION
Screw
Spacer
Internal Shield
Screw
Spacer
Phono Jack
Phono Plug
Phono Plug, 90°
Connector Body, 3-pin
Connector Pin
vco Shield
Screw
Connector, 8-pin
Cable Tie
Phono Jack
Connector, 8-pin
Spacer
Front PA Bracket
Heatsink
Case Top - Gray
Case Top - Beige
Antenna Connector
Speaker Jack
Solder Lug
Connector Pin
Connector Body
Rear PA Bracket
Washer
—~90—
PART NUMBER
2823-0562-042
2800-3301-104
2508-5480-000
2823-0375-042
2813-1240-633
2101-3451-301
2104-3451-401
2104-3457-601
2109=-3339-706
2106-3339-801
OTY
USED
2508-5480-300
2823-0500-042
2105-3457-302
6005-0000-002
2101-3451-201
2105~-3457-402
2813-1240-635
1400-6447-200
5400-6445-200
1411-7053-014
1411-7053-009
2105-0000-020
2101-3430-303
2101-0000-004
2107-3244-101
2109=5120-403
1400-6445-500
2640-3191-913
SECTION
PRP BRP RPORPBHPWHENEN RUPEE
PRRPNRPRE
3
SUP EGET sigOeN@O4 p — 350? RoVele Cobe Bo0eL Lge Fo ieN Ss
Add to this section any Service Bulletins that are
issued concerning changes to this manual.
0300-4399-000 =—91- SECTION 4
cies nokioge aut $1 ‘
Leunen ailing og sponds ¢ ‘pal et
Pian, 6
BERT TE eae
' : :
| ; Mab 4 Tk:
a Trt ye 3 oF
gg Dy j =)
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me a h at aes i eae “ee 9 bf
ere sony ae py
yi
oe 4 is
ry 7 - v