Read Sony HCD-EC68P / HCD-EC78P / MHC-EC68PI / MHC-EC78PI Service Manual online
HCD-EC68P/EC78P
HCD-EC68P/EC78P
35
35
B
E
B
E
Q101
Q102
R101
R102
R103
R104
R105
R106
R107
R108
R109
R110
R111
R112
R113
R114
R122
R123
R125
R126
R127
R128
R131
R132
R133
R134
R135 R136
C103
C104
C105
R142
C106
R145
C109
R146
C110
C116
C123
C124
C125
C126
C128
D101
D103
JR132
1
15
4 5
1
2
1
5
CN102
CN104
R129
R130
C101
C102
C107
C108
C119
C120
JW131
JW132
JW133
JW134
JW135
JW136
JW137
LOW AMP BOARD
IC101 IC102
(EC68P/EC78P: UK) (EC78P: US,CND)
G
H
MAIN
BOARD
CN603
MAIN
BOARD
CN633
1-875-495-
14
(14)
A
B
1
2
3
4
G
CN633
BOARD
(1/3)
MAIN
MAIN
(1/3)
CN603
BOARD
H
0
-36.8
0
0
-35.2
0
0
0
36.7
0
0
35.2
2
0
0
0
0
0
0
C116
4700p
50V
1
C101
50V
1
C102
220
R125
220
R127
220
R128
220
R126
2W
0.22
R129
2W
0.22
R130
2.2k
R135
2.2k
R136
2SA2026
Q101
2SA2026
Q102
MC2838-T112-1
D101
C106 100p
C105
100p
3p
C109
3p
C1
10
∗
C120
C1
19 ∗
1k
R123
47k
R1
14
47k
R1
13
47k
R107
47k
R108
25V
47
C108
25V
47
C107
∗
R103
∗
R104
R105
∗
R106
∗
470p
C103
470p
C104
0.1
C128
1k
R109
1k
R1
10
0.1
C124
0.1
C123
0
R101
0
R102
22k
R133
22k
R134
1.2k
R132
1.2k
R131
R122
100
1
2
3
4
5
5P
CN104
PA-GND
OUT-R
+VH
-VH
OUT-L
TP101
TP102
TP103
TP104
TP105
TP107
TP108
TP109
TP110
TP111
470
R1
12
470
R
111
1
2
3
4
5
5P
CN102
PROTECT
AMP-ON
IN-L
A-GND
IN-R
MA2J1110GLS0
D103
0
R142
1
9
8
7
6
5
4
3
2
15
14
13
12
11
10
STK433-070 (EC78P: UK)
IC101
STK433-060 (EC68P)
IC102
STK433-090-E
(EC78P: US, CND)
(EC78P: US, CND)
(EC78P: US, CND)
(EC68P/EC78P: UK)
470
R145
470
R146
C126
0.1
C125
0.1
LOW AMP BOARD
IC101
POWER AMP
IC102
POWER AMP
-PRE
-VCC
+VCC
LO+
LO-
RO+
RO-
+PRE
SUB
GND
LI-
LI+
ST
-BY
RI-
RI+
Q101,102
OVER LOAD DETECT
100 63V
100 50V
∗C119, 120
(EC68P)
(EC78P)
∗R103, 104
220 (EC78P: US, CND)
1.8k (EC78P: UK)
3.3k (EC68P)
∗R105, 106
4.7k (EC68P)
22k (EC78P)
B
A
D
C
7
6
9
5
3
1
8
4
2
(Page 31)
6-11. PRINTED WIRING BOARD - LOW AMP Board -
•
: Uses unleaded solder.
• See page 27 for Circuit Boards Location.
6-12. SCHEMATIC DIAGRAM - LOW AMP Board -
(Page 30)
(Page 30)
(Page 31)
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