Schematic Diagram - Sub Woofer Section (Gt44/Gt55) - Sony HCD-GT22 Service Manual

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3 7 6 3 1 5 1 5 0
7-25. SCHEMATIC DIAGRAM – SUB WOOFER Section (GT44/GT55) –
1 2
SUB WOOFER BOARD
A
B
C
D
CN501
R529
3P
L 2.2k
SW-SIG_IN 1
SW-SIG_GND 2
MAIN
BOARD
SW-ON/OFF 3
(4/4)
CN271
T E
(Page 41) L 1 3 9 4 2 2 9 6 5 1 3
E
(GT55)
(Page 45)
+VCC 1
F
Q1
GND 2
-VCC 3
AMP
PROTECT 4
BOARD
CN443
RELAY+ 5
RELAY- 6
CN502
Q2
6P
AMP
G
BOARD
CN443
(Page 47)
(GT44)
H
w w w
HCD-GT22/GT44/GT55
• See page 58 for IC Block Diagrams.
3 4 5
1 2
D507
R531
4.7k MA111-TX
Q507
2SC3052EF-T1-LEF
0
TEMPERATURE DETECT
0.2
C516 12.4
10
50V
C502
220p
C503 R501
R502
4700p 47k
47k JR501
0
R503 R504
47k
1k
C504
22
R506
25V
1
JW521
R534
1
R524
15.7 15.7
47k
0
Q506
Q505
2SC3052EF-T1-LEF 2SC3052EF-T1-LEF
0
Q505,506
DC DETECT
C514
100
35V
x a o
y
. i
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6 7 8
IC501
STK404-130S
IC501
POWER AMP
3 4 5 6 7 8 9 10 11 12 13
R511
0.22
5W
R510
0.22
5W
R508
4.7k
1W
Q501
2SC5625
OVER LOAD
DETECT
R513
C505
1k
10p
0
C507
47 15.4
C513
50V
0.1
R514
C512
22k
0.1
R505
4.7k
Q Q
2W
3 7 6
C506
100
R509
25V
100 R512
R527
10
10
C509
100
C511 R525 R526
100V
10 10
10
100V
C510
10
100V
R532
R520
22k 100k
15.5
Q503
0
2SC3052EF-T1-LEF
TEMPERATURE DETECT
C517
R533
10
22k
50V
u 1 6 3
49 49
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2 4
8 9 9
9 10 11 12
IC B/D
Q502
ISA1235AC1TP-1EF
RELAY DRIVE
R517
10k
11.5
10.7
R522 R516
11.5
100
100
0
R521
R523
R518
10k
100 100
RY501
-1 -2
CN503
4P
R515 1 SW-OUT
47k
2 SW-OUT
3 SW-SP_GND
3 1 5 1 5 0 8 9 2
4 SW-SP_GND
m
c o
.
HCD-GT22/GT44/GT55
2
8 9 9
13 14 15
SW-SP BOARD
SW-OUT
1
SW-OUT
+
JK501
SW-SP_GND
-
SW-SP_GND
4 9 8 2 9 9
4
SUB WOOFER
OUT