Printed Wiring Board - Key Board - Sony ICF-M770L Service Manual

ICF-M770L/M770S/M770SL
5-5. PRINTED WIRING BOARD – KEY Board – •
• Semiconductor
1
Location
Ref. No. Location
KEY BOARD
D101 I-4
A
D102 I-7
D103 I-6
D104 D-7
D105 D-7
D106 D-3
IC101 I-5
R113
IC102 B-3
IC103 D-3
B
IC104 D-4
S116
Q101 I-4
Q102 I-4
Q103 G-5
S118
Q104 F-4
Q105 E-5
Q106 I-6
R168
C
Q107 E-7
Q108 I-3
Q109 I-4
Q110 F-3
Q111 I-6
D
R169
S119
S117
E
F
G
H
I
See page 9 for Circuit Boards Location.
2 3 4
S108 S107 S106
R147
7
6
5
S109
OPERATION
4 3
IC102
JW135
JW116
1 2
R110
1
LCD101
LIQUID CRYSTAL DISPLAY
M770S/
M770SL
IC103
4 3
43 42
TUNE/
TIME
(M770SL)
SET 1 2
56
R112
IC104
D106
K A
(M770L) 1
R120
R121
M770L/
C113
M770S
R122
R123
15
14
JW105 R124
R141
C130
JW106
JW107
R139
C116
JW108
C117
Q110 Q104
JW109
B C E B C E
JW110
C118
R164
S112
SCAN
JW111
C115
JW112
JW113
JW114
C152
JW115
S110
STANDBY
SLEEP
S113
JC105
ON/OFF TIME SET
JC107
Q101
1 15
B C E
C141
C140
B C E
Q102
JW119
Q108 D101
R109
B C E
JW120
A
MAIN
(Page 10)
BOARD
12 12
5 6 7
S105 S104 S103
3 2
4
PRESET TUNING
STATION SELECT/ PRESET
S120
HOLD
HOLD OFF
17
D105
C139
29
(LCD BACK LIGHT)
C136
28
X101
R144
D104
C128
JW134
C133
Q107
C132
B C E
Q105
C149
B C E
R140
JW133
C148
R135
JW132
R134 R118
L101
R160
S114
LIGHT
JW131
JW127
JW128
R136
B C E
S111
Q103
CLOCK (M770L)
mb/CLOCK (M770S/M770SL)
S115
R174
L102
C151
C129 L103
Q109
+
B C E
5 4
C145
Q111
E C B
1 3
IC101
K A D103
C144
+ E C B
+
C146
Q106
C105
T101
8
S102 S101
1
BAND
D104, 105
T101
11
(11)
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