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46
HCD-GTX88
HCD-GTX88
6-14. SCHEMATIC DIAGRAM — MAIN SECTION (3/4) — • Refer to page 67 for IC Block Diagrams.
(Page 44)
(Page 45)
(Page 47)
1
D
2
H
F
E
3
10
4
9
A
8
7
5
C
B
G
6
MAIN BOARD (1/4)
3
5
MAIN BOARD (2/4)
(4/4)
BOARD
MAIN
7
IC B/D
0.6
0
4.4
0
0
0
0.6
1.3
8.4
9
0[3.3]
3.1<0>
3.3
0
3.2
0.6
2.9
2.9
4.5
4.5
4.5
0
4.4
0.6
2.9
2.9
4.5
4.5
4.5
0
4.5
-0.9<-0.2>[0.7]
-0.9<-0.2>[0.7]
0
0
0.7[-8.7]
0.7[-8.7]
0
0
0
0.7[-8.6]
0.7[-8.6]
0
-0.9
<-0.2>
[8.9]
9
9[0]
9[0]
0[3.2]
4.8[0]
0[3.2]
4.8[0]
0[9]
9
8.2[9]
8.9
[-8.7]
9
0.1[8.9]
0[3.2]
9[0]
9[6.8]
0
[0.2]
0.1
[-0.2]
0.1
[8.2]
0.01
C370
4700p
C371
10V
47
C374
0.01
C377
6800p
C379
1000p
C372
1000p
C373
3.3k
R370
4.7k
R371
4.7k
R374
47
R377
10k
R378
10
R379
2SD596-T1DV4
Q370
33
R386
47k
R395
4.7k
R394
RT1P137P-TP-1
Q378
100uH
L372
R373
0
6.8k
R380
10k
R391
2.2k
R397
R376
0
6.8k
R388
10k
R392
2.2k
R393
120p
C378
330p
C383
330p
C384
120p
C380
27mH
L370
27mH
L371
2SA1162-YG-TE85L
Q377
2.2k
R381
2.2k
R382
2.2k
R383
2.2k
R384
2.2k
R385
2.2k
R387
10k
R399
10k
R390
10k
R396
680p
C375
680p
C376
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
HA12237F
IC301
PB-NF2
(R)
PB-EQ(R)
EQOUT(R)
T
A1(R)
PB-OUT(R)
NC
REC IN(R)
ALC(R)
NC
REC OUT(R)
ALC ON/OFF
HIGH/NORMAL
A/B
MUTE ON/OFF
REC MUTE OFF/ON
VCC
ALC DET 1M
GND
I REF
TEST
REC OUT(L)
NC
ALC(L)
REC IN(L)
NC
PB OUT(L)
T
A1(L)
EQOUT(L)
PB-EQ(L)
PB-NF2(L)
PB-NF1(L)
A IN(L)
RIP
B IN(L)
REC-RETN
GND
B IN(R)
NC
A IN(R)
PB-NF1(R)
16V
47
C359
50V
10
C310
16V
47
C309
0.012
C301
0.1
C303
2200p
C314
50V
10
C304
50V
1
C305
50V
10
C311
50V
2.2
C306
3.3k
R301
R302
3.3k
10k
R303
2.2k
R319
2.2k
R304
10k
R337
22k
R339
47k
R305
1
2
3
4
5
6
7
8
8P
CN507
GND
E-HOT
R-REC
GND
R-PB
L-REC
GND
L-PB
1
2
3
3P
CN503
R-PB
GND
L-PB
1200p
C381
1200p
C382
TP325
TP318
0.012
C351
0.1
C353
10
C354
50V
50V
1
C355
50V
2.2
C356
2200p
C364
3.3k
R351
R352
3.3k
10k
R353
2.2k
R369
10k
R357
2.2k
R354
47k
R355
TP309
TP311
22k
R389
50V
10
C361
TP338
TP320
100
R312
0
R311
100
R310
4.7k
R309
100
R308
1M
R307
22k
R306
10V
470
C308
50V
10
C307
50V
10
C312
1
2
3
3P
CN510
L
GND
R
6
2
1
3
5
4
T301
TRANSFORMER
BIAS OSCILLATION
0
JR114
0.022
C385
0.022
C386
JW584
10k
R356
10k
R336
18k
R375
18k
R372
Q374
2SD2704K-T146
Q373
2SD2704K-T146
Q372
2SD2704K-T146
Q371
2SD2704K-T146
Q375
2SD2704K-T146
Q376
2SD2704K-T146
RT1N141C-TP-1
Q379
RT1N141C-TP-1
Q381
RT1N141C-TP-1
Q383
RT1P141C-TP-1
Q382
RT1N141C-TP-1
Q380
C1
C2
C3
C4
C5
D1
D3
B1
B2
60
59
55
56
57
58
MAIN BOARD (3/4)
DECK A/B SELECT,
IC301
HP901
PB HEAD
(DECK A)
PB
(L-CH)
PB
(R-CH)
HRPE901
REC/PB/ERASE
HEAD
(DECK B)
REC/PB
(L-CH)
REC/PB
(R-CH)
ERASE
PB/REC EQUALIZER AMP
Q371-376
MUIE
Q377,379,381
MUTE CONTROL SWITCH
Q382,383
TC PB MUTE CONTROL SWITCH
Q370
BIAS OSC
Q378,380
REC BIAS CONTROL SWITCH
TEST
PIN
Summary of Contents for HCD-GTX88
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