Printed Wiring Board -Key Section (1/2) - Sony WX-GT77UI Service Manual

WX-GT77UI/GT78UI/GT78UIM
4-9. PRINTED WIRING BOARD – KEY Section (1/2) –
14 13 12
KEY BOARD (SIDE A)
D55,57,S17
ALBM/
PRESET
+
S17
D57
D55
D56,58,
S19
D44
D46
D58
S19
D44-47
D56
VOL
ILLUMINATION
D45 D47
D61 D59
S20
D59,61,S20
ALBM/
PRESET
–
WX-GT77UI/GT78UI/GT78UIM
• : Uses unleaded solder.
11 10 9
D63,65,S15
SRC/SOURCE
S15
D87,88,S16
D64,66,S2
D88 MODE D66
D87
D64
S16
S2
D70
D60,62,S18
D68
SEEK +
S3
D68,70,S3
D62
DSPL/SCRL
S18
D67,69,S4
D60
S4
BTM
D69
D67
D71,73,S5
EQ3
S5
D73
D54 D52
D71
D52,54,S21
S21
S22
S6
D74
RESET
D72,74,S6
D72
ZAP
8 7 6
D65
D63
34
LCD1
LIQUID CRYSTAL DISPLAY PANEL
33
• Semiconductor Location
Ref. No. Location Ref. No. Location
(D7) E-4 D55 C-12
(D8) E-5 D56 D-13
D44 D-13 D57 C-12
D45 E-13 D58 D-13
D46 D-12 D59 E-12
D47 E-12 D60 D-11
D48 C-3 D61 E-12
D49 D-3 D62 D-11
D50 F-3 D63 B-8
D52 F-10 D64 C-9
D54 F-11 D65 B-8
( ): SIDE B
24 24
5 4 3
D75,77,S12
D77
1
66º
D75
S12
(LCD BACK LIGHT)
D48
D76
(LCD BACK LIGHT)
D49
D80,82,S9
4/SHUF
(LCD BACK LIGHT)
D85
D50
D83
S7
D86
1
D84 D84,86,S7
6/PAUSE
Ref. No. Location Ref. No. Location Ref. No. Location
D66 C-9 D77 B-3 D88
D67 E-9 D78 C-2
D68 D-9 D79 D-2 (IC1)
D69 E-9 D80 E-2 (IC2)
D70 D-9 D81 D-2
D71 F-9 D82 E-2 (Q40)
D72 G-9 D83 F-2 (Q41)
D73 F-9 D84 G-3 (Q42)
D74 G-9 D85 F-2 (Q43)
D75 B-3 D86 G-3
D76 C-2 D87 C-10
2 1
A
B
D76,78,S11
2
D78
S11
C
D79,81,S10
3/REP
D81
D79
S10 D
S9
D82
D80
E
S8
D83,85,S8
F
5/DM+
G
C-11
G-12
D-6
C-3
E-3
D-3
E-3