Sony HCD-EC55 Service Manual page 88

HCD-EC55/EC77/GX99
Ver. 1.2
SCHEMATIC DIAGRAM — LOW-AMP BOARD (EC77/GX99) —
1 2
EC77/GX99
A
B
C
D
E
F
G
OUT-L
-VH
+VH
OUT-R
D
PA-GND
PROTECT
MAIN BOARD(2/2)
AMP-ON
CN603
H
IN-L
( SUPPLEMENT-1 (
Page 5
A-GND
IN-R
I
HCD-EC55/EC77/GX99
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
1
2
3
4
5
6
7
8
9
10
6 7
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
C154
0.1
C155 0.1
C105
C113 100p
C111
*
*
* C111,C113
100uF/ 50V : EC77 : EXCEPT US,CND
100uF/ 63V : EC77 : US,CND/GX99
R123
47k
R107
1k
D121
R124
MAZ8051GMLS0
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
4700p
2SC3052EF-T1-LEF
AMP
PROTECT-1
C115 R128
0.01 10k
EXCEPT
AEP,RU
JW120
5
12 12
8 9 10
* IC101
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,AR,AUS 1.8K
EC77 : AEP,RU 2.2K
R103,R104
*
EC77 : AEP,RU 12K
EC77 : E2,E3,E51,MX,AR,AUS 15K
C106
100p
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 R102
C108
* *
47
25V
C119 C120
0 0
AEP,RU
R130
100
11 12
C15 3
0.1
R129
1k
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