Schematic Diagram - Amp Board (Gt22/Gt55) - Sony HCD-GT22 Service Manual

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3 7 6 3 1 5 1 5 0
7-21. SCHEMATIC DIAGRAM – AMP Board (GT22/GT55) –
1 2 3
A
AMP BOARD
B
C
D
E
T E
L 1 3 9 4 2 2 9 6 5 1 3
F
R468
2.2k
1W
G
H
I
J
(GT55)
CN443
7P
JL422
K
+VCC 1
w w w
Q1
GND 3
-VCC 4
SUB WOOFER
PROTECT 5
BOARD
CN502
RELAY+ 6
(Page 49)
RELAY- 7
L
HCD-GT22/GT44/GT55
• See page 58 for IC Block Diagrams.
4 5 6
1 2 3 4 5 6
D447
30PRA20FC
D446
D448
UDZW-TE17-16B
30PRA20FC
Q441
2SC5625
OVER LOAD DETECT R455
1k
15 0
R449
0.22
5W
0
R500
D445
100
UDZW-TE17-16B
R457
R491
22k
33k
C462 R467
47 2.2k
100V 1W
R487
47k
R440
15k
0.2
Q487
R490
2.2k
1.9 2SC3052EF-T1-LEF 0.8 2SC3052EF-T1-LEF
PROTECT
R498
DETECT
1k
0
(GT55)
1.8
R489
R499
2.2k
1k
0
R488
Q486
22k 2SC3052EF-T1-LEF
2SC3052EF-T1-LEF
Q480,Q486,488
RELAY DRIVE
x a o
y
. i
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7 8 9 10
IC441
STK415-130
IC441
POWER AMP
7 8 9 10 11 12 13 14 15 16 17 18 19
R459
100k
R460
100k
0 15
Q442
2SC5625
OVER LOAD DETECT 0
R479
R496 3.3k
30.5 2.6
100
Q489
2SC3052EF-T1-LEF
STANDBY SWITCH
3.2
D483
R458 R492 R470
D441
Q Q
33k MA111-TX 1k
22k
MC2836 R441
3 7 6
2.2k
1000p
R469
33k
D481
MA111-TX
C463
R495
C461
22
47 1
35V
100V
C486
R482
15.5
2.2
10k
50V
15.5
R481
4.7k
0
Q485
ISA1235AC1TP-1EF
PROTECT R486
100k
R480
R485
33k 15.2
47k
Q483
2SC3052EF-T1-LEF
Q488 Q484
0 15.4
2SC3052EF-T1-LEF
0
(GT55)
0.7
0.2
Q482
0
2SC3052EF-T1-LEF
0.8
R483
R484
330
47k
C481
Q480
TH441 100
Q483,484
10V
TEMPERATURE DETECT
u 1 6 3
45 45
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2 4
8 9 9
11 12 13 14
IC B/D
C446
100p
C445 D443
MA111-TX
100p
RY441
R447
R448
47k 47k
R407
R446 R466 R497
120k
1k 100k
R465
47k
R445
1k
C448
C453 C451
C447
47
3 1 5 1 5 0 8 9
0.1 0.1
47
50V
C443 50V
C441
C411
10 C454 C452
1000p R453 R424 R421 R422 R444
50V 10 10 10 0.1 0.1
10 47k
R420 R425 R423
R454
10 10 10 10
C403
C409
R410
∗
0.1
100k
100V
∗
409,410
2200 50V(GT22)
3300 50V(GT55)
Q481,482
DC DETECT
Q481
2SC3052EF-T1-LEF D401 D402
D10XB20 D10XB20
15.4
~
~
0
~
~
m
c o
.
HCD-GT22/GT44/GT55
2
8 9 9
15 16 17
L441
1.7uH
-1
R461 R411
-2
10 10
+
L
R413 R412
JK441
10 10 -
SPEAKER
R462 R414
-
R417 10 10
R
100
+
R418
100
R416 R415
100 R419
10 10
100
L442
1.7uH
CN441
13P
2 4 9 8 2 9 9
13 HP L-OUT
12 HP-GND
11 HP R-OUT
C444 10 RELAY_B+
1000p
9 PROTECT
M1
8 IN-R
R442
C442
7 AMP-A_GND
2.2k 10
MAIN
50V
6 IN-L BOARD
(4/4)
5 UNREG.16V
CN031
4 POWER_GND
(Page
JL438
3 STK_MUTE
41)
2 NC
JL439
1 GND(AC-3_RELAY)
CN442
6P
1 AC-VH
P1
3 AC-VL
4 GND
TRANS
BOARD
5 AC-VL
CN903
6 AC-VH
(Page
55)
E
EP401
(CHASSIS)