Schematic Diagram - Main (3/4)/Head (A)/Head (B) Boards - Sony HCD-GX8000 Service Manual

HCD-GX8000/RG77
Q Q
3 7 6 3 1 5 1 5 0
7-15. SCHEMATIC DIAGRAM – MAIN (3/4)/HEAD (A)/HEAD (B) Boards – •
(FOR ADJUSTMENT)
(DECK A)
HP901
(PB)
T E
L 1 3 9 4 2 2 9 6 5 1 3
L-CH
R-CH
TAPE
MECHANISM DECK
BLOCK
(CHASSIS)
(TCM-230AWR41)
CN2
HRPE901
6P
(REC/PB/ERASE)
1
L-CH
R-CH
ERASE
7
(DECK B)
(Page 32)
w w w
(3/4)
IC303(2/2)
NJM4565M(TE2)
C399 R397
0.01 15k
C398
0.01
LOW-PASS
FILTER
R398 2.2M
C395 22p
R313 R327
1k 15k
R333 C316
2.2k 1
R362
10k
Q306
FA1A4M
R334
MUTING 100k
Q389
FA1A4M
CN301
3P MUTING CONTROL
L C391 C390 SWITCH
R314
100 470
GND 1k
10V 10V
R
CN1
NO302
3P
3P
C321
L-PB TP321 390p YY1
GND
TP322
R-PB TP323 YY2
C371
390p
R393
4.7k
NO303
8P
C326
L-PB TP301 390p YY3
Q304
FN1F4M
GND
L-REC TP303 YY4
R-PB YY5
TP304 C376 390p
GND
R-REC YY6
TP306
Q305
FA1A4M
GND TP307
E-HOT TP308
RV304
220k
(CHASSIS)
R371 C334
CN304 47k 27p
17P
TP317
BMETAL
BPLAY.SW 57
B 120 /70
R373
BHALF 91
1k
R374
APLAY.SW 56
47k
BSHUT 90
R375
A 120 /70 75k
T301 Q302
+3.3V
2SC2001
BIAS OSC
R377
AHALF 70
47k
DGND
ASHUT 89
BTRGM+ XX1 R378 75k C335
0.01
TRGMGND 100V
ATRGM+ XX2
C336
CAPMH/L XX3 2.2
50V R343 R344
CAPM+ XX4
5.6 5.6
CAPM-
x a o
y
. i
http://www.xiaoyu163.com
See page 28 for Waveforms.
JR390
IC303(1/2)
NJM4565M(TE2)
R315 C315
10k 1
R365 C365
10k 1
C397
R388 R387
10
22k 10k
50V
Q390
FA1A4M
BUFFER
Q398
FA1A4M
R395
4.7k BUFFER
Q399
2SC3624A
BUFFER C396
R396 R390
22
10k 10k
50V
REC/PB SWITCHING
IC302
µPC1330H
Q Q
3 7 6
C385
10
50V
C332 C333
0.00012 330p
R332 R342
8.2k 2.2k
Q304,305
L301
27mH R329
REC/PB SWITCHING
10k
C331
0.01
C383 C381
L351 330p 0.01
27mH
R379
R392
10k
C384 2.2k
RV354
27p
220k
C382 R382
0.00012 8.2k
Q301 Q307
2SC3624 2SA812
Q302,303 R316
10k
BIAS OSC Q391
2SB1116
C337
15000p R328
2.2k R317
Q301,307,310
10k
C362 R361
REC BIAS
4700p 2.2k
SWITCH
Q303
2SC2001
Q392
C341 C342 FA1A4M
R347
10 47
3.3k Q310
50V 16V
FA1A4M
69 65
XX1
u 1 6 3
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
[
{
〈〈
36 36
http://www.xiaoyu163.com
2 4
8 9 9
(Page 34)
C311 R304 R305
R302 C314
10 2.2k 47k
4.7k 2200p
50V
R330
22k
RV301
47k
R320
2.2k
C305
C303 1
0.1 50V
C306
R301
C304 2.2
3.3k
50V
C301
0.01
TP325 TP318
DECK A/B SELECT
SWITCH,
REC/PB EQ AMP,
ALC
IC301
HA12237
PB-NF1B
PB-
C309 47 16V
NF1A
TEST
YY1 AIN1
I-REF
C310 10 50V
RIP GND
ALC
YY3
BIN1 DET
3 1 5 1 5 0 8 9 2
REC-
RETN
VCC
REC MUTE
GND
ON/OFF
YY5 BIN2
MUTE
ON/OFF
NC A/B
TP338
AIN2
YY2
NORMAL/HIGH
SPEED
PB-
ALC ON/
NF2A
OFF
C359
47
16V
C351
0.01
R351
C354
3.3k C356
2.2
50V
C364 R352 R370 R354 RV351
2200p 4.7k 2.2k 2.2k 47k
R355
47k
R360 R364
680 680
Q396
2SB1068
Q393
Q391,392 Q393,394
2SB1116
TRIGGER PLUNGER TRIGGER PLUNGER
DRIVE(DECK B) DRIVE(DECK A)
R366
R391 C363 R363 R399
3.3k
2.2k 4700p 2.2k 2.2k
Q394 Q395 Q397
FA1A4M FA1A4M FA1A4M
INVERTER
52 51 54
XX2 XX3 XX4
m
c o
.
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
] : TAPE PLAY (DECK A)
Replace only with part number specified.
} : TAPE PLAY (DECK B)
〉〉 : REC
2
8 9 9
E1
E2
R394
10k
53
E3
TP320
R306
22k
R307
1M
C308
C307
470 L302
4 9 8 2 9 9
10
16V 100µH
50V
R308
61
100
C312 R309
10 50V 4.7k 58
R310 100
67
(Page 37)
R311 100
66
R312 100
68
C361
R380 10
22k 50V
E4
R367
47k
Q396,397
CAPSTAN MOTOR
DRIVE
R368 R369
3.3k 3.3k
E5
55
E6
E7