Schematic Diagram - Main Section (3/4) - Sony HCD-GTX88 Service Manual

HCD-GTX88
6-14. SCHEMATIC DIAGRAM — MAIN SECTION (3/4) — • Refer to page 67 for IC Block Diagrams.
1
A
HP901
TEST
PB HEAD
PIN
(DECK A)
B
PB
(L-CH)
PB
(R-CH)
C
HRPE901
REC/PB/ERASE
HEAD
(DECK B)
REC/PB
(L-CH)
D
REC/PB
(R-CH)
ERASE
E
F
G
H
HCD-GTX88
2 3 4
MAIN BOARD (3/4)
CN510
3P
L
1
GND
2
R
3
CN503
3P
L-PB
3
GND
2
R-PB
1
0 Q376
2SD2704K-T146
-0.9<-0.2>[0.7] R385
2.2k
<-0.2>
Q375
2SD2704K-T146
-0.9<-0.2>[0.7]
R387
2.2k
0
0
Q374 Q377
CN507 2SD2704K-T146 2SA1162-YG-TE85L
8P
R384
0.7[-8.7] 8.9 9
L-PB
0 2.2k
8
[-8.7]
R383
GND 8.2[9]
7
2.2k
0.7[-8.7]
R390
L-REC
6
10k
Q373
R-PB
5 2SD2704K-T146
GND
4
Q372
R-REC
3
2SD2704K-T146
E-HOT
0[9]
2
R382
0.7[-8.6]
GND
1 0
2.2k
R381
0.7[-8.6]
2.2k
Q379
RT1N141C-TP-1
Q371
2SD2704K-T146
0
Q371-376 Q377,379,381
MUIE MUTE CONTROL SWITCH TC PB MUTE CONTROL SWITCH
L371
27mH
C380
120p
L370
27mH
C378
120p
T301
TRANSFORMER
BIAS OSCILLATION
R370
3.3k
6 1
2SD596-T1DV4
C371
5 2
4700p
0.1
[8.2]
R378
4 3
10k
C377
0.01
5 6
(Page 44)
MAIN BOARD (1/4)
3
-0.9
Q382
RT1P141C-TP-1
[8.9]
IC B/D
9
C309
9[0]
47
16V
0.6
31
0
9[0] 32
C310
4.4
0[3.2] 33
10 50V 0
34
Q383
35
RT1N141C-TP-1
36
0
Q381
37
RT1N141C-TP-1
TP338
4.8[0]
38
0
56 39
0.6
4.8[0] 40
0[3.2]
C359
47
16V
Q382,383
R388 R393
6.8k 2.2k
R380 R397
6.8k 2.2k
55
Q378
R386 L372
RT1P137P-TP-1
33 100uH
Q370
0.1[8.9] 9
BIAS OSC
Q370
9[6.8]
Q378,380
REC BIAS CONTROL SWITCH
0
[0.2]
0.1
[-0.2] 9[0]
0[3.2]
Q380
RT1N141C-TP-1
46 46
7 8 9
MAIN BOARD (2/4)
5
C314
2200p
C311
R337 R336 R339 10
10k 10k 22k 50V
TP325 TP318
C307
10
50V
30 29 28 27 26 25 24 23 22 21
R307
PB-NF2(L)
1M
R306
PB-NF1(L) TP320
TEST 20
22k
1.3
A IN(L)
I REF 19
RIP
GND 18
8.4
B IN(L) IC301 C308
ALC DET 1M 17
JW584
470 10V
9
REC-RETN
IC301 VCC 16
R308 100
0[3.3]
GND HA12237F
REC MUTE OFF/ON
15
DECK A/B SELECT, 3.1<0> C312 10 50V R309
B IN(R)
MUTE ON/OFF 14
PB/REC EQUALIZER AMP
R310 100 57
3.3
NC A/B
13
0 R311 0
HIGH/NORMAL
A IN(R)
12
R312 100 58
3.2
PB-NF1(R)
11
PB-NF2
(R)
1 2 3 4 5 6 7 8 9 10
TP311 TP309
R356 R357 R389 C361
10 50V
10k 10k 22k
R369
2.2k
10
(Page 45)
59
4.7k 60
D1
MAIN
7
BOARD
(4/4)
(Page 47)
D3