Sony HCD-EC78 - 7-15. PRINTED WIRING BOARDS - KEY Section -; 7-16. SCHEMATIC DIAGRAM - KEY Section -

HCD-EC68/EC78
HCD-EC68/EC78
3434
R407
R408
R409
R410
R411
KEY CD BOARD
R491
R492
19
C491
C495
C496
JACK BOARD
C698
1
3
2
12
SW306
SW307
SW308
SW309
SW310
1
3
SW301
W401
KEY POWER BOARD
JW491
13
JW614
W610
REG BOARD
IC601
A2
PAN EL
BOARD
CN303
A1
PAN EL
BOARD
CN303
1-875-492-
12, 13
(12, 13)
12, 13
(12, 13)
12, 13
(12, 13)
12, 13
(12, 13)
DISC 1
DISC SKIP/
EX-CHANGE
DISC 2
DISC 3
;
D
MAIN
BOARD
B2
PAN EL
BOARD
CN306
B1
PAN EL
BOARD
CN306
C
MAIN
BOARD
CN605
1-875-489-
1-875-493-
1-875-491-
STANDBY
J492
J491
PHONES
AUDIO IN
B
A
C
D
E
1234 5
(NC)
(SUFFIX-12)
(SUFFIX-12)
(SUFFIX-13)
(SUFFIX-13)
7-15. PRINTED WIRING BOARDS - KEY Section -
(Page 27)
(Page 32)
• : Uses unleaded solder.
• See page 23 for Circuit Boards Location.
(Page 32)
(Page 27)
PANEL
CN303
BOARD
A
(1/2)
BOARD
C
MAIN
CN605
MAIN
D
BOARD
(1/2)
PANEL
CN306
BOARD
B
17.1 8.9
R407
2.2k
TP415
TP416
R408
2.7k
R409
3.9k
R410
6.8k
R411
15k
KEY CD BOARD
DISC 1
SW306SW307
DISC 2
SW308
DISC 3
SW309SW310
DISC SKIP/
EX-CHANGE
KEY-1
GND
1
2
J491
AUDIO IN
C491
0.1
C495
1000p
C496
1000p
TP491
TP492
TP493
TP494
TP495
TP496
TP497
TP498
J492
PHONES
R491
22k
R492
22k
JACK BOARD
1
A-GND
AUDIO-L
HP-GND
AUDIO-R
HP-R
HP-L
SP-RELAY
AMP-ON
9GND
0.1
C698
IO
G
TA7809S
IC601
1
3
2
REG BOARD
+9V REGULATOR
IC601
TP409
TP410
1
2
3
3P
W401
KEY-0
GND
KEY-SW-ON
(NC)
KEY POWER BOARD
STANDBY
SW301
/
B
531
C
D
E
F
G
4
A
2
3
2
1
3P
W610
OUT
GND
IN
7-16. SCHEMATIC DIAGRAM - KEY Section -
(Page 28)
(Page 33)
(Page 33)
(Page 28)
Note: Refer to “SUFFIX-12/SUFFIX-13 DISCRIMINATION
OF PANEL BOARD” (page 3) of the servicing notes
for suffi x-12 and suffi x-13.
(Page 32)
(Page 32)
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
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