Printed Wiring Boards - Key Section; Schematic Diagram - Key Section - Sony HCD-EC55 Service Manual

HCD-EC55/EC77/GX99
7-11. PRINTED WIRING BOARDS — KEY SECTION —
1 2 3
KEY-LEFT BOARD
A
B
C
KEY-RIGHT BOARD KEY-RIGHT BOARD
D
R418 R418 R417 R417
EQ DSGX
E
F
KEY-CD BOARD
W402
G
SW309
SW307
SW308
DISC 3 DISC 3 DISC 2 DISC 2
H
HCD-EC55/EC77/GX99
• See page 29 for Circuit Boards Location.
:Uses unleaded solder.
4 5 6
F
PANEL BOARD
W304
(Page 38)
12
R404
(12)
1-872-056-
R416 R416 R415 R415 R414 R414
– +
CN403
1-872-057-
H PANEL BOARD
W306
(Page 38)
PANEL BOARD
G
W305
(Page 38)
SW310 SW310
DISC SKIP/
EX-CHANGE
SW306
12
DISC 1 DISC 1
(12)
1-872-058- 1-872-058-
7-12. SCHEMATIC DIAGRAM — KEY SECTION —
7
1
A
B
KEY-RIGHT BOARD
C
SW318
EQ
12
D
(12)
KEY-CD BOARD
E
SW310
DISK SKIP/
EX-CHANGE
40 40
2 3 4
KEY-LEFT BOARD
R404
1k T P409
1 KEY- 0
T P410
2 GND
T P411
3 AVCC
SW302 SW301
T P412
4 STBY-LED
DISPLAY
CN401
LED302
SLR-325VCT31P
STANDBY
R418 R417 R416 R415 R414
TP415
47k 22 k 10 k 4.7k 2.2k
TP416
SW317 SW316 SW315 SW314
DSGX
PLAY MODE
/TUNING MODE
R411 R410 R409 R408 R407
47k 22 k 10 k 4.7k 2.2k TP413
TP414
SW309 SW308 SW307 SW306
DISC 3 DISC 2 DISC 1
5
F
PANEL
BOARD
4P
W304
(Page 39)
1 KEY- 2
H
2 GND
PANEL
CN403 2P
BOARD
W306
(Page 39)
1 KEY- 1
G
GND
2
PANEL
W402 2P
BOARD
W305
(Page 39)