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HCD-EC68
Sony HCD-EC68 Service Manual
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HCD-EC68/EC78
HCD-EC68/EC78
31
31
B
E
B
E
Q101
Q102
R101
R102
R103
R104
R105
R106
R107
R108
R109
R1
10
R
111
R1
12
R1
13
R1
14
R122
R123
R125
R126
R127
R128
R131
R132
R133
R134
R135
R136
C103
C104
C105
R142
C106
R145
C109
R146
C1
10
C1
16
C123
C124
C125
C126
C128
D101
D103
JR132
1
15
4
5
1
2
1
5
CN102
CN104
R129
R130
C101
C102
C107
C108
C1
19
C120
JW131
JW132
JW133
JW134
JW135
JW136
JW137
LOW
AMP BOARD
IC101
G
H
MAIN
BOARD
CN603
MAIN
BOARD
CN633
1-875-495-
12, 13
(12, 13)
A
B
1234
7-10.
PRINTED WIRING BOARD - LOW
AMP Board -
•
: Uses unleaded solder
.
• See page 23 for Circuit Boards Location.
(Page 27)
(Page 27)
G
CN633
BOARD
(1/2)
MAIN
MAIN
(1/2)
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
C1
16
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-T1
12-1
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
-
G
N
D
OUT
-R
+VH
-VH
OUT
-L
TP101
TP102
TP103
TP104
TP105
TP107
TP108
TP109
TP1
10
T
P
111
470
R1
12
470
R
111
1
2
3
4
5
5P
CN102
PROTECT
AMP-ON
IN-L
A-GND
IN-R
MA2J1
110GLS0
D103
0
R142
19
8
7
6
5
4
3
21
5
14
13
12
11
10
STK433-070 (EC78)
IC101
STK433-060 (EC68)
470
R145
470
R146
C126
0.1
C125
0.1
LOW AMP
BOARD
IC101
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
∗
C1
19, 120
(EC68/EC78: E2, E3, E51, MX,
AR)
(EC78: AEP
, RU)
∗
R103, 104
1.8k (EC78)
3.3k (EC68)
∗
R105, 106
4.7k (EC68)
22k (EC78)
B
A
D
C
7
69
5
3
1
8
4
2
7-1
1.
SCHEMA
TIC DIAGRAM - LOW AMP
Board -
(Page 28)
(Page 28)
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
30
32
Table of Contents
Default Chapter
1
Te L 13942296513
1
Table of Contents
2
1 Servicing Notes
3
2 General
6
Other Operations
7
3 Disassembly
8
Disassembly Flow
8
Side Panel (L)/(R)
9
Top Panel (EC68: UK Model)/Top Panel Block (Except EC68: UK Model)
9
Tape Mechanism Deck (Except EC68: UK Model)
10
MAIN Board
10
Front Panel Section
11
Back Panel Block
11
CD Mechanism Block
12
BU Block
12
OP Base Assy (KSM-213D)
13
4 Test Mode
14
5 Mechanical Adjustments
18
6 Electrical Adjustments
18
7 Diagrams
23
Printed Wiring Board - CD Board
24
Schematic Diagram - CD Board
25
Printed Wiring Board
26
DECK Board (Except EC68: UK Model)
26
Printed Wiring Board - MAIN Board
27
Schematic Diagram - MAIN Board (1/2)
28
Schematic Diagram - MAIN Board (2/2)
29
Printed Wiring Board - HI AMP Board (EC78)
30
Schematic Diagram - HI AMP Board (EC78)
30
Printed Wiring Board - LOW AMP Board
31
Schematic Diagram - LOW AMP Board
31
Printed Wiring Board - PANEL Board (Suffi X-12)
32
Printed Wiring Board - PANEL Board (Suffi X-13)
32
Schematic Diagram - PANEL Board
33
Printed Wiring Boards - KEY Section
34
Schematic Diagram - KEY Section
34
Printed Wiring Board - PT Board
35
Schematic Diagram - PT Board
36
8 Exploded Views
44
Panel Section
44
Tape Deck Section (Except EC68: UK)
45
Front Panel Section
46
Chassis Section
47
Main Section
48
CD Mechanism Section (CDM88A-K6BD90-WOD)
49
9 Electrical Parts List
50
4
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Sony HCD-EC68 Specifications
General
Brand
Sony
Model
HCD-EC68
Category
Stereo System
Language
English
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