Sony HCD-EC55 Service Manual page 84

HCD-EC55/EC77/GX99
Ver. 1.2
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
• :Uses unleaded solder.
4 5 6
F
PANEL BOARD
W304
( (
SUPPLEMENT-1
13 14
Page 6
R404
(13) (14)
1-872-056-
R416 R416 R415 R415 R414 R414
– +
CN403
1-872-057-
H PANEL BOARD
W306
( (
SUPPLEMENT-1
Page 6
PANEL BOARD
G
W305
( (
SUPPLEMENT-1
Page 6
SW310 SW310
DISC SKIP/
EX-CHANGE
SW306
13 14
DISC 1 DISC 1
(13) (14)
1-872-058- 1-872-058-
SCHEMATIC DIAGRAM — KEY SECTION —
7
1
A
B
KEY-RIGHT BOARD
C
R418
47k
SW318
EQ
13 14
D
(13) (14)
KEY-CD BOARD
E
SW310
DISK SKIP/
EX-CHANGE
8 8
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
R417 R416 R415 R414
TP415
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
( SUPPLEMENT-1 (
Page 7
1 KEY- 2
H
2 GND
PANEL
CN403 2P
BOARD
W306
( (
SUPPLEMENT-1
Page 7
1 KEY- 1
G
GND
2
PANEL
W402 2P
BOARD
W305
( SUPPLEMENT-1 (
Page 7