Schematic Diagram - Low-Amp Board (Ec77/Gx99) - Sony HCD-EC55 Service Manual

HCD-EC55/EC77/GX99
Ver. 1.2
Q Q
7-16. SCHEMATIC DIAGRAM — LOW-AMP BOARD (EC77/GX99) —
3 7 6 3 1 5 1 5 0
1 2
EC77/GX99
A
B
C
D
T E
L 1 3 9 4 2 2 9 6 5 1 3
E
F
G
OUT-L 1
-VH 2
+VH 3
OUT-R 4
D
PA-GND 5
PROTECT 6
MAIN BOARD(2/2)
AMP-ON 7
CN603
H
IN-L 8
(Page 37)
A-GND 9
IN-R 10
w w w
I
HCD-EC55/EC77/GX99
• See page 50 for IC Block diagram.
3 4 5
LOW-AMP BOARD
R159 R155
10k 220
R167
2.2k
0 0
R161
10k
C151
Q151
4700p
R165
2SA2026
0
10k
OVER LOARD
DET-L
R160 R156
10k 220
R152
0.22
R168
2W
2.2k
0 0
Q152
C152 R162
2SA2026
0 4700p 10k
OVER LOARD
D152
DET-R
MA111-TX
R166
10k
CN101
10P
x a o
. i
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6 7 8
IC101
IC102
POWER AMP POWER AMP
1 2 3 4 5 6 7 8 9 10 11
R151
0.22
2W
R121 R119
220 220
R122 R120
220 220
C105
100p
C113 C111
* *
Q Q
3 7
* C111,C113
100uF/ 50V : EC77 : AEP,RU,E2,E3,E51,MX
100uF/ 63V : EC77 : US,CND/GX99
R107
1k
D121
R123 R124
MAZ8051GMLS0
47k
47k
C118 R125
5 C107
100k
4700p
47
5.4 25V
Q101
2SA1235TP-1EF
AMP
0
PROTECT-2
R126
R127
4.7k
10k
5.5
0
Q102
C116
2SC3052EF-T1-LEF
4700p
AMP
PROTECT-1
C115 R128
0.01 10k
EXCEPT
AEP,RU
JW120
5
u 1 6 3
y
44 44
http://www.xiaoyu163.com
2 4
8 9 9
9 10
*
IC101
IC B/D
* IC101
STK433-070 EC77 : EXCEPT US,CND
* IC102
* IC102
STK433-090-E EC77 : US,CND/GX99
12 13 14 15
* R101,R102
EC77 : US,CND/GX99 1.5K
EC77 : E2,E3,E51,MX 1.8K
EC77 : AEP,RU
2.2K
* R103,R104
EC77 : AEP,RU 12K
EC77 : E2,E3,E51,MX
15K
C106
100p
6 3 1 5 1 5 0 8 9
C103 C104
470p 470p
R105 R106
R111 C109 R108 R112 C110
47k 47k
47k 3p 1k 47k 3p
C101
C102
1 1
50V 50V
R103 R104
R109
R110
* *
0
0
R101 R10 2
C108
*
*
47
25V
C119 C120
0 0
AEP,RU
R130
100
m
c o
.
2
8 9 9
11 12
2 4 9 8 2 9 9
C15 3
0.1
R129
1k
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