Schematic Diagram - Sony ICF-C490 Service Manual

4-4. SCHEMATIC DIAGRAM •
See page 9 for IC Block Diagrams.
L2
C21 C1
3p FM 18p
RF OSC
L1
AM
FERRITE-ROD
ANTENNA
S1
BAND
AM
W7
FM LEAD FM
ANTENNA
TP
(FM ANT)
JW6
R7 JC4
330 0
R6
2.2k
T1
C10
0.01
CF2 CF3
JC5
L4
0
L3
R1 C2 AM OSC C3 JW3
FM 3.3k 27p 5p
JW127
R14
CV1 3.3k
Q1
TUNING
2SA812
MUTING
R15
0
RV1
50k
VOL
R2
2.2k
C5 C8 R3 JC2
0.01 1000p 47 0
C7
10
50V
JC1 CF1
0
R5
2.2k
JW2
R4 15k
R11
C9 47k
BUZZER VOLUME
1
50V
NORMAL
FM/AM FRONT-END,
FM/AM IF AMP,
DET,AGC,AF AMP
IC1
CXA1019S
C17 C6 C18
1 0.47 0.47
C14
0.1
C11 C12
4.7 10 C13
50V 50V 0.022
C15 C16 C19
22 470 100
25V 10V 10V
TP TP
(SP-) (SP+)
SP1
D202
ALARM TOL-50BHRBKEA
-KS04
BUZZER
D201
ALARM
TOL-50BHRBKEA
-KS04
RADIO
1 4
1 4
R108 R110
330 330
JW125
D102
D101 S101
1SS119
JW115 JW109 1SS119
ALARM MODE
R104 RADIO+BUZZER
56k
D103
1SS119
BUZZER
RADIO
R132 R131
220 220
Q101 R111
2SC1623 10k
OFF
SWITCHING
C114
R101 1
10k 50V
C120
0.01
C116
0.1
S101(1/2) S101(2/2)
JC102
0
JW130 JW108
S111 R139
100
LOUD Q102 JW124
DTC124EKA
SWITCH
QUIET
JW121
R109 R107 R106
22k 3.3k 47k
S102(1/2)
S102
ALARM TIME/
CLOCK SET
Q2 S102(2/2)
2SC2001 CLOCK BUZZER RADIO HOLD
RIPPLE
FILTER
JW101
R8
1k
C20
JW4
220
10V
D305
1SS119
POWER BACK UP
FOR CLOCK
DRY BATTERY
6F22
(IEC DESIGNATION 6F22)
1PC. 9V
11 11
LED101
COG314TOE1 (SINGAPORE)
COG314TOA1 (AUSTRALIAN)
(LED DISPLAY)
16
MODE CONTROL,
LED DRIVER
IC101
LM8562
JW116 JW129
JW110
JW117
D104
1SS119
C118
0.01
JW123
R115
100k
S106 S107 S109
D108 R124
1SS119 10k
C104
0.01
R122
47k
R126
47k
S103
TIME SET + JW119
S104
JC101 0
Q103
TIME SET FAST + JW104
2SC1623
SWITCHING
S105
TIME SET FAST -
C115
0.01 S104 S103 S105 S108
SLEEP
R113
R125
47k
10k
R121
JW114 R116 100k
47k
R123
10k
JW105
R117 R119
100k 47k
JW107 JW118
JW103
7 1
7 1
R301
100k
R305
150
TRANSFORMER
1/2W C303
0.01
Q301
D302
2SA812 R304
1SS119
JW
SWITCH
C304
0.01
D303
C301 C302 1N4002
470 1000
25V 10V
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
ICF-C490
W5
1
C112 C113
0.01 0.01
D106 D107
1SS119 1SS119
R135 R138
22 22
S110
R130
100
S110
BRIGHTNESS
HIGH LOW
C119
0.01
R128
1k
C110
0.1
C111
S106
R127 100
1M 16V
ALARM RESET
RADIO OFF
C108
0.01 S107
ALARM RESET
RADIO ON
S109
SNOOZE
C109
0.01
JW102
T301
POWER
PC1
(AC IN)