Printed Wiring Boards - Sony ICF-C490 Service Manual

ICF-C490
4-3.

PRINTED WIRING BOARDS

• Semiconductor
Location
A
Ref. No. Location
D101 C-8
D102 B-6
D103 B-6
D104 B-7
D105 E-9
D106 D-10
D107 D-10
B
D108 C-7
D201 G-5
D202 G-4
D302 H-8
D303 H-8
D305 G-6
IC1 D-3
C
IC101 D-8
LED101 F-7
Q1 E-5
Q2 E-3
Q101 C-9
Q102 C-9
Q103 C-6
D
Q301 G-7
SP1
E
F
G
H
I
1 2 3
L1
AM FERRITE-ROD
ANTENNA
MAIN BOARD
S1
BAND
FM
CV1
TUNING
AM
C3 C21
S1
CV1-4 CV1-1
L2
CT1-4 CT1-1
CV1-3
CV1-2
C1
L4
CT1-3
CT1-2
L3
JC1
ALARM RESET
R15
1 15
CF3
R7
CF1
IC1
TP
C9 C6 C14
(SP−)
30 16
C18
R3
+ +
+
JW2 C12 C11 CF2
TP(SP+)
C19
RV1
Q2
C16 C15
RV1
VOL
4 5 6
W7
FM LEAD ANTENNA
TP
(FM ANT)
S101
ALARM MODE
R131
RADIO+BUZZER BUZZER
D103
R132
D102
R139
R122
C118
S106
ALARM RESET
S108
RADIO OFF R125
R124 SLEEP
Q103
B C E
JW110
S107
JW121
JW3
RADIO ON
C7
JW115
C120
JW119
JW1
Q1
S109
E C B
SNOOZE
1 4
16
T1
C20
+
LED BOARD POWER BOARD
D305
1 4
POWER BACK UP
RED
FOR CLOCK
DRY BATTERY
D201
D202 11
6F22
BLK
(IEC DESIGNATION 6F22)
ALARM
ALARM
1PC. 9V
RADIO
BUZZER
(11)
1-684-735-
10 10
7 8 9
S111
BUZZER VOLUME
QUIET NORMAL LOUD
S102
ALARM TIME/
CLOCK SET
CLOCK BUZZER
−2
R106
RADIO OFF −1
D104
−1
R118
S103 JW111
R101
TIME SET +
JW130
S104 Q102
JW108
−2
TIME SET E C B
R116
C114
FAST +
+
D108
JW109 Q101
R136
D101
E C B
R123
R119 S103
C121
JW114 R117
15 JC101
R120 C108
28
R128
JW120
(SINGAPORE)
IC101
C111
14
+
D105
1
1
W5
1
LED101
(LED DISPLAY)
R301
1 7
Q301
C302
R305
C301
+
+
PS301
R304
T301
POWER
TRANSFORMER
10 11
S110
BRIGHTNESS
LOW HIGH
RADIO HOLD
R130
R138 R135
S105
TIME SET
JW107
FAST −
JW106
JW105
JW104
D107
D106
JW102 JW103
7
11
(11)
1-684-733-
11
PC1
(11)
1-684-734-
(AC IN)