Sony ICF-C490 - Schematic Diagram

ICF-C490
1111
4-4. SCHEMATIC DIAGRAM • See page 9 for IC Block Diagrams.
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
C21 C1 R1 C3C2
R15
JW3
JW127
JC5
Q1
R14
R2
JC2
R101
C114
R104
R136
C121
D101
R132 R131
D102
D103
JW125
R108 R110
JW6
JC4
R6
C10
C11 C12
C13
C14
C15 C16
C17 C6 C18
SP1
JW4
C20
R8
JC1
C5
C7
C8 R3
C9
JW2
R5
R11
R4
JC102
JW130 JW108
C116
S102(1/2)
S102(2/2)
JW101
JW124
R109 R107 R106
S101(2/2)
R139
JW121
D108
JW123
D104
JW110
C118
C117
C103
R112
C104
JW120
R114
C105
R115
C106
C107
R118
R120
JW116
S106 S107 S109
R124
R122
R126
JW113
C119
R128
C111
R127
C108
C109
JW102
R125
S105S103S104
JW115 JW109
JW119
R113
JW114
JW122
R116
JW106
R121
R123
JW105
JW111
R117 R119
JW107 JW118
JW103
S110
R130
R135 R138
R129
D106 D107
C112 C113
C301 C302
D303
C304
D302
C303
JW129
JW117
R111
R305
C120
D201
D202
IC101
S101(1/2)
Q101
RV1
S1
L4
L3L2
L1
W7
R7
JW1
IC1
Q2
S111
Q102
C115
Q103
D105
C110
S108
T1
C19
TP TP
D305
R301
PS301
T301
PC1
CF2 CF3
CF1
TP
JW104
JC101
Q301
R304
W5
3p 18p 3.3k 5p27p
0
0
2SA812
3.3k
2.2k
0
10k
1
50V
56k
10k
2.2
1SS119
220 220
1SS119
1SS119
330 330
0
2.2k
0.01
4.7
50V
10
50V 0.022
0.1
22
25V
470
10V
1 0.47 0.47
220
10V
1k
0
0.01
10
50V
1000p 47
1
50V
2.2k
47k
15k
0
0.1
22k 3.3k 47k
100
1SS119
1SS119
0.01
100p
3300p
180k
0.01
33k
0.1
100k
0.01
1000p
1k
1k
10k
47k
47k
0.01
1k
100
16V1M
0.01
0.01
10k
47k
47k
100k
10k
100k 47k
100
22 22
100
1SS119 1SS119
0.01 0.01
470
25V
1000
10V
1N4002
0.01
1SS119
0.01
10k
150
1/2W
0.01
TOL-50BHRBKEA
-KS04
TOL-50BHRBKEA
-KS04
LM8562
2SC1623
50k
330
CXA1019S
2SC2001
DTC124EKA
0.01
2SC1623
MTZJ-T-77-13B
0.1
100
10V
(SP-) (SP+)
1SS119
100k
(FM ANT)
0
2SA812
JW
G
N
D
G
N
D
N
F
V
O
L
A
M
O
S
C
A
FC
FM
O
S
C
R
E
G
O
U
T
FM
R
F
N
C
FE G
N
D
FM
/AM
FM
R
F IN
R
F IN
A
M
D
IS
C
R
I
FM
FM
/A
M
B
A
N
D
S
EL
ECT
A
M
IF IN
IF IN
N
C
FM
M
E
T
ER
IF G
N
D
A
G
C
A
FC
A
G
C
A
FC
D
ET
O
U
T
A
F IN
R
IP
P
LE
FILT
E
R
A
F O
U
T
V
C
C
G
N
D
G
N
D
C
O
L O
U
T
M
IN
A
&
F
M
IN
C
&
D
M
IN
B&
G
10'S
M
IN
E&
M
IN
E
10'S
M
IN
C
&
D
1
0
'S M
IN
B&
G
10
'S M
IN
A
&
F
H
R
A
&
F
HR
C&
D
H
R
B
&
G
1
0'S
H
R
C
&H
R
E
PM
&1
0'S
HR
B
AM
&
10'S
R
T-T
IM
E
D
IM
M
ER
M
OD
E
S
ELEC
T
50/6
0H
z
INPUT INPUT SL
P
/S
N
Z
INPUT O
N
/O
FF
TIM
E
SET A
LM
SELECT A
LM
-2
OUTPUT OUTPUT A
LM
-1
OUTPUT R
A
D
IO
S
PE
E
D
POWER DOWN C
R
O
S
C
H
R
A
G&
D
E
14
16 1
V
S
S
(LED DISPLAY)
COG314TOE1
COG314TOA1
ALARM
BUZZER
ALARM
RADIO
MODE CONTROL,
LED DRIVER
V
D
D
BUZZER
RADIO+BUZZER
RADIO
OFF
ALARM MODE
S101
SWITCHING
VOL
MUTING
FM
AM
BAND
CV1
TUNING
AM OSC
C
V
1-4
CT1
-4
C
V
1
-3
C
T
1
-3
C
T1-2
C
V
1-2
C
T
1
-1
C
V
1
-1
OSC
FMFM
RF
FERRITE-ROD
ANTENNA
AM
ANTENNA
FM LEAD
IF O
U
T
FM/AM FRONT-END,
FM/AM IF AMP,
DET,AGC,AF AMP
RIPPLE
FILTER
BUZZER VOLUME
LOUD
NORMAL
QUIET
SWITCH
ALARM TIME/
CLOCK SET
S102
HOLDRADIOBUZZERCLOCK
SWITCHING
S103
TIME SET +
TIME SET FAST +
S104
S105
TIME SET FAST -
(SING
A
PO
R
E)
S106
ALARM RESET
RADIO OFF
ALARM RESET
S107
RADIO ON
SNOOZE
SLEEP
POWER BACK UP
FOR CLOCK
DRY BATTERY
(IEC DESIGNATION 6F22)
1PC. 9V
SWITCH
17
17
POWER
TRANSFORMER
(AC IN)
BRIGHTNESS
HIGH LOW
S109
S110
LED101
41
6F22
(SINGAPORE)
(AUSTRALIAN)