Service manual

1 702 Schematic Notes
VOLTAGE & WAVEFORM NOTATIONS - Voltage readings and waveform measurements were taken
with a color video signal injected at the video input terminal. Each variable resistor was set to condi-
tion at time of shipment, After adjustments have been made, the figures will vary and the figures
should be used
for reference only.
VOLTAGE READINGS - Multimeter set at 20KO/volt DC.
All values given are
DC voltages.
REFERENCE WAVEFORMS - Scope sweep speed set at:
Hor -
20 /LS/div Vert - 5V/div;
Unless other speed is specified.
SCHEMATIC NOTES - Unless specified otherwise:
Resistors:
Capacitors:
Inductors:
All values are
in ohms, 1/6 watt carbon.
Values
of 1 or higher are pF.
Values less than 1 are /LF, 50V, ceramic.
Electrolytic values are in
/LF, NP indicates non-polar (bipolar).
Values are in uH.
<;;:> indicates a test point connection
~ indicates chassis ground
Hz indicates cycles per second
SAFETY - For safety, maximum reliability, and continued good performance, use specified replace-
ment parts. All safety items have been identified with the symbol *. FR is an abbreviation for FUSI-
BLE RESISTOR~. FR's act like fuses and are used as safety items. They are to be replaced with
specified parts.
NOTICE -This circuit diagram and the circuit constants are subject to change for improvement without
notice.
ftS=E~'ER
[1 r------------ -----------------------------------------------------,1
;.; R32! 390 A ReSI
:oJ. -: TP~51 LI I ~.8K 5.61">
GE-1003A(5/6)
AV INPUT PB ASS' Y
(REAR)
LUMA AUDIO CHRO~A
1~~-d~-C9J'p- --,
I
IC601
AN5265
AUDIO
ATT I
J
--J OUTPth f1
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DC VOL 'I .fAiiDIol
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t---~~ __ 4r+~~I~'8~V~_ ~ ~---i~~----~----~
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4.71< 1150
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C602
220/16
R&D;'
39 ""
CS03
10/50
+
+
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10K
C604
10150
R6M
4.7
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1000/16
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.001 ;;1.' BP • r ~.:r' ISuBlISliBl j~O" 2." I I 114 "m 1
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IC301®PIN ACe CONTROL AM DETECTOR 9.~~6+ 1 I \.....!.!:...:. I ~ LL :4!- ;;.,
().!)Vp_p I O€TECTOR f IC301 HAlI247 10/16 Rl~ I I ~====:;::::;:::;:;:::;=;t~~--~ CS51T ... 7 820P
-B- ~ ~'" APC B.P AMP.Ace.KiLLER. Q301 . ! I GE -1 0 0 3 A( 4 16) -J,02 ~~71-
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GE-I003A(1I6)
MAIN PCB
ASS'Y
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BURST AMP I? tl fTP-' 10.._";'';' /
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TP-50 0301 R306 1.2K T 86-" R312 330 C3~
tSl~~~ lOtI: xg30~9 ~ I f. Y
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: CRT SOCKET PB ASS'Y 11"r.
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GE-I003A(6/6)
AV INPUT PB ASS' Y
(FRONTI
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190 RJ01 3'3 C30~3\OrC3111 C3lrrC3131 47125 R3!3 R314 ~
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=- BUFFER
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~ VIDEO AMP 560 114
IC201
HA1l401
VIDEO &
SYNC SEPA
R322 10K
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: 150 6.9~~vr;, 400"
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2.21< 33/6.3
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10/16
560 33K Mit {]II 330 R2a9 A..A.... ' ....
Q34\ 1/4 R'2. I' DC fV" R51S R519,.u 0351 Colledor 0352 Collticlor 0353 Coll«1Or
BUFFER 8.21( ISS~) -:~~~JMHt Q251 '--_1"_' ____ '''_, __ --' + ~r30 n:~P~n pI1 ~ pIl
10
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LERROR AMP CONTROL I : .001 wh~~ l2J ,>~~02~... T C;04* d"/ R40910K 560 I/2:W 1r;;c==~;;,,' 0'1'01
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I", I J T to CONTROL PCB
LI" V V" (HJ>OSIT10NI
REG.
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20W ,A} _________ ,
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IC901
5TR3125
1 702 Schematic
41