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SCHEMATIC OF THE Peo act ose |
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HEATHKIT® 101-150 PARTS MOUNTED ON THE AM CIRCUIT BOARD. THIS SYMBOL INDICATES A CIRCUIT BOARD ' i) I
i
PLUG CONNECTION ( PIN NUMBER INDICATED }. t
@
175-199 PARTS MOUNTED ON THE FM DIVIDER CERCUIT I a ee me TS Se
AM/FM STEREO DIGITAL TUNER BOARD. Y THIS SYMBOL INDICATES A CONNECTION TO A
[12¥]
CIRCUIT VOLTAGE SUPPLY.
MODEL AJ-1600 201-349 PARTS MOUNTED ON THE FM IF CIRCUIT BOARD.
THIS SYMBOL INDICATES A POWER SUPPLY
350-399 PARTS MOUNTED ON THE OUTPUT CIRCUIT BOARD.
VOLTAGE SOURCE.
401-499 PARTS MOUNTED ON THE DISPLAY CIRCUIT BOARD. THIS SYMBOL INDICATES A DC VOLTAGE TAKEN
> FROM THE POINT INDICATED WITH A HIGH INPUT
500-599 PARTS MOUNTED ON THE SWITCH CIRCUIT BOARD. IMPEDANCE VOLTMETER TO CHASSIS GROUND.
. ALSO INDICATES DC VOLTAGES AT MUTE CIRCUITS
NOTES: 601-699 PARTS MOUNTED ON THE POWER SUPPLY CIRCUIT IN MUTED CONDITION.
1. ALL RESISTORS ARE 1/4 WATT ,5% TOLERANCE UNLESS :
. he . THIS SYMBOL INDICATES DC VOLTAGES AROUND
OTHERWISE NOTED, (ke 1000, M+ 1,000,000). ** PARTS MOUNTED ON LED CIRCUIT BOARD. LC MUTE CIRCUITRY IN UNMUTED CONDITION.
2. CAPACITORS LESS THAN 1 ARE IN pF ( MICROFARADS } NOTE: PUT AND PLZ ARE MOUNTED ON THE
. . LAMP CIRCUIT BOARD.
ALL OTHER CAPACITORS ARE IN pF ( PICOFARADS ) UNLESS * THIS SYMBOL INDICATES AN OPERATING DC
OTHERWISE NOTED VOLTAGE {IN AM MODE ONLY.
: 4. THE FOLLOWING SYMBOLS ARE USED ON THE SCHEMATIC.
ok ok ORDER ONLY DIRECT-REPLACEMENTS, BY HEATHKIT
3. COMPONENT NUMBERS ARE IN THE FOLLOWING GROUPS: = THIS SYMBOL INDICATES A CHASSIS GROUND. PART NUMBER. Copyright © 1978
Heath Company
1-99 PARTS IN THE TUNER ASSEMBLY OR MOUNTED THIS SYMBOL INDICATES A CIRCUIT BOARD 5. FOR THE PHYSICAL LOCATION TO COMPONENTS, REFER TO All Rights Reserved
ON THE SSIS GROUND. THE " + "
CHA . CIRCUIT BOARD X-RAY VIEWS," STARTING ON PAGE 116. Part of 595-2147-03 printed in the United States of America
Page 126
Ge uearuxit:
SEMICONDUCTOR
IDENTIFICATION
CHARTS
DIODES
COMPONENT HEATH MAY BE IDENTIFICATION
PART NUMBER | REPLACED WITH
D202, D203 56-26 1N191
D204, D205 56-27 S160
D201, D206,
D401, 0402, 56-56 1N4149
D403
D608 56-64 MZ1000-24
(30-voit)
BANDED END
1N4744A,
D607 56-620 17 mA zener
(15-volt)
D207, D601 57-65 1N4002
through D606
D1, D2, D3 412-632 LED we
SMALL
FLAT
Page 127
GaegHuearHxire
TRANSISTORS
COMPONENTS HEATH MAY BE IDENTIFICATION
PARTNUMBER | REPLACED WITH
Q204, 215,
Q216, Q219, 417-283 $M07275
Q351, Q353
Q202, Q203,
Q206, Q217,
Q218, 0221, 417-284 SM62186
Q222, Q352,
Q354 Ss 2 ) ( D}
Q175, Q176 417-293 2N5770 Za ZA
Bc EB
C
Q101, Q201,
Q211, Q213, 417-801 MPSA20
Q214
Q102, Q205,
Q207, Q208, 417-875 2N3904
Q209, Q401,
Q402
Q103, Q104, ;
0177, 0212 417-881 MPSA13
Q175 417-869 Ds8629
S
aeot 417-918 2N6387 Zz
BO
INTEGRATED CIRCUITS (TOP VIEWS)
COMPONENTS HEATH MAY BE IDENTIFICATION
PART NUMBER
REPLACED WITH
U201 through 442-20
U205
UA703
DECOUPLING
HIGH INPurC3)
Page 128
Ge gueatrHKitT?
memes
Integrated Circuits (cont’d.)
COMPONENTS HEATH MAY BE IDENTIFICATION
PART NUMBER REPLACED WITH
INPUT{ 1 4 | GND
TAB TAB
1C601 442-617 UA78MGT2C
OUTPUT | 2 3 | CONTROL
HEAT SINK TABS ARE
CONNECTED TO GND
iF INPUT[ 4 u GND
BIAS | 2 AGC
BIAS| 3 GND
U206 442-637 HA1137 enol a SIGNAL METER
VOLTAGE
MUTE [s MUTE CONTROL
CONTROL INPUT VOLTAGE
AUDIO OUT] 6 Vec
AFC| 7 DC REFERENCE
QUADRATURE
|
F ouT| 8 9 INPUT
INPUT +[ 1 U 14] INPUT
cnof 2 13]6N0
cno[3 12|GNoD
U207, U208 442-657 MC1355
cno[ 4 11] vec
FEEDBACK[< To] FEEDBACK
DECOUPLE DECOUPLE
GNo|[ 6 9 7GND
ouTPutTl 7 8 ]OUTPUT
Ge guEeastrHxuire
Page 129
Integrated Circuits (cont’d.)
COMPONENTS HEATH MAY BE IDENTIFICATION
PART NUMBER REPLACED WITH
RF DECOUPLE U 16{RE DECOUPLE
SIGNAL METER
ANT INPUT | 2 OUTPUT
AGC
OSC Vee DECOUPLE
. RF OUTPUT 2nd IF
uU101 442-658 HA1197 4
INPUT
MIXER OUTPUT] 5 DET. OUTPUT
OSC INPUT} 6 Vcc
MIXER INPUT] 7 GND
lst IF INPUT! 8 lst OUTPUT
INS
ou :
IN a OU
IN + >———— 17}ouT
IN —— >————— 16] out
IN,
iN > OUT
U403, U404 442-659 UDN6128A iN
IN OUT
ra
IN > OUT
“Lo
RY ul
IN +> 0
KY OU
IN L7
GND Vss
Vec} 1 Ce l61}Vco
INPUT| 2 15]L.P.F OF PLL
PREAMP
ouTpUT Lo 14] L.P.F OF PLL
PILOT CANCEL
U209 442-673 HA11223 CONTROL 4 13] L.P.F OF PLL
PLL PHASE
R. OUTPUT] 5 te CORRECTION
L. output 6 11) b.P.F LAMP
CIRCUIT
GNDI 7 To) L.P.F LAMP
CIRCUIT
STEREO IND. 9 |PILOT CANCEL
OUTPUT WAVEFORM
Page 130
—_ Ge guearHKit:
Integrated Circuits (cont’d.)
COMPONENTS HEATH MAY BE IDENTIFICATION
PARTNUMBER [| REPLACED WITH
U402 443-701 MC14049 A
AM FREQ[T] UY 28) vec
FM FREQ? | 27) SET TIME
AM/FM[3 | 26] SET FREQ
INHIBIT TIME SET[A] 25) INTENSITY
TEST[5 | 24) SEGMENT E
PRESET [6] 23) SEGMENT A
OSCILLATOR 1 (7] 22) SEGMENT 8
U401 443-870 A438112 OSCILLATOR 2[38] 21) SEGMENT F
FM/IF ADJUST [9] [20] SEGMENT DP
DIGIT 2 [19] 19) SEGMENT C
dIGiT 3 fi 18] SEGMENT G
Dicit 42 7] SEGMENT D
DiGiT 1 (3) 6] SET MINUTES
GND [14] rr5] SET HOURS
(TTL) Vee, [2 Oo Pa} (ECL/BUFFER)
INPUT
U175 443-869 DS8629 OUTPUT [2] [7] (POSITIVE-EDGE TRIGGERED)
(TTL) GND, | 3
(ECL BUFFER} | 4
6 | INPUT
(NEGATIVE-EDGE TRIGGERED}
5 | BIAS