Sony HCD-EC55 - Printed Wiring Boards - KEY Section; Schematic Diagram - KEY Section

4040
HCD-EC55/EC77/GX99
HCD-EC55/EC77/GX99
7-11. PRINTED WIRING BOARDS — KEY SECTION —
• See page 29 for Circuit Boards Location.
:Uses unleaded solder.
1-872-058-1-872-058-
1-872-056-
1
STANDBY
DISPLAY
+
–
DSGX
EQ
12
(12)
R407
R408
R409
R410 R411
DISC 2
DISC 3
DISC 1
R418 R417 R416 R415 R414
12
(12)
R407
R408
R409
R410 R411
DISC 2
DISC 3
DISC 1
DISC SKIP/
EX-CHANGE
R418 R417 R416 R415 R414
1-872-057-
12
(12)
PANEL BOARD
W304
(Page 38)
PANEL BOARD
W306
(Page 38)
F
H
PANEL BOARD
W305
(Page 38)
G
SW310
SW318
SW316
SW314
PLAY MODE/
TUNING MODE
KEY-RIGHT BOARD
SW310
SW309
SW308
SW307
SW306
W402
SW318
SW317
SW315
SW314
CN403
PLAY MODE/
TUNING MODE
KEY-RIGHT BOARD
KEY-CD BOARD
SW302
SW301
R404
LED302
CN401
KEY-LEFT BOARD
12
A
B
C
D
E
F
G
H
34567
7-12. SCHEMATIC DIAGRAM — KEY SECTION —
KEY-RIGHT BOARD
KEY-LEFT BOARD
KEY-CD BOARD
F
PANEL
BOARD
W304
(Page 39)
G
PANEL
BOARD
W305
(Page 39)
H
PANEL
BOARD
W306
(Page 39)
R404
1k
T P409
T P410
T P411
T P412
SLR-325VCT31P
LED302
SW301SW302
DISPLAY
1
2
3
4
4P
CN401
KEY- 0
GND
AVCC
STBY-LED
STANDBY
R409
10k
R410
22k
R407
2.2k
R408
4.7k
R411
47k
TP413
TP414
SW306
DISC 1
SW307
DISC 2
SW308
DISC 3
SW309SW310
2PW402
1
KEY- 1
2
GND
DISK SKIP/
EX-CHANGE
R416
10k
R417
22k
R414
2.2k
R415
4.7k
R418
47k
TP415
TP416
SW314SW315SW316SW317
DSGX
SW318
EQ
1
2
2PCN403
KEY- 2
GND
PLAY MODE
/TUNING MODE
1 2 3 45
A
B
C
D
E