Read Sony ICF-C492 Service Manual online
ICF-C492
12
12
ICF-C492
5-3. SCHEMATIC DIAGRAM
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
C113
JC105
D106
C112
JW124
R135
R130
R307
R306
C303
C304
D302
D303
R304
R305
C301
PS301
Q103
C115
R113
R301
C27
R14
D305
JW123
JW2
CN2
C26
C22
C32
C25
C24
C21
C17
C18
CF2
CF1
JW1
C16
R12
C31
C12
JC2
C1
D2
D1
C29
R9
R10
R8
C14
C13
R7
R6
C3
CT1-1
CV1-1
C4
CT1-2
CV1-2
CT1-3
CV1-3
C7
C6
L4
CT1-4
CV1-4
C8
C11
R15
R5
JC1
JW3
D109
JW102
JW115
JW105
C116
R101
JW117
R104
C114
R136
R111
R106
R107
R109
R118
JW108
JW114
JW109
JW110
C104
C111
C103
C123
C145
R112
JC102
R114
R115
C105
C106
C117
C107
C118 C119
JW111
JW101
C110
R128
C108
JW106
JW107
JC103
R120
JC108
S105
S104
S103
R126
JW118
R121
R123
R117
R119
R116
R129
JW112
JW113
T301
S111
SP1
C124
R122
R139
R150
R125
D104
D108
R131
R132
D102
D103
R108
R143
IC1
CF3
D105
R127
D107
JC302
JW100
R157
R124
T1
R4
L2
L3
R3
L1
W1
TML301
TML302
TP
L101
L102
CN107
IC101
CN102
Q1
C19
Q301
Q102
D101
Q101
Q106
S109
CN302
JW119
Q2
C302
R13
C15
JC101
C20
S101(2/2)
S101(1/2)
RV2
P301
RV1
S1
S107
S106
S108
0.01
0
1SS119
0.01
4.7k
2.2k
0
0
0.01
0.01
1SS133
1N4002B
220
1/2W
220
1/2W
470
25V
25V
2SC4154TP-1EF
0.01
47k
100k
220
10V
10V
1k
1SS133
2P
100
10V
10V
470
10V
10V
1
1
1
22
25V
4.7
50V
50V
10
50V
0.01
2.2k
0.01
0.01
0
100p
1SS133
1SS133
100p
4.7k
22k
47
1000p
10
50V
0
1k
2p
22p
22p
5p
4p
0.01
22k
10k
0
1SS133
0.1
10k
47k
1
10k
10k
47k
2.2k
22k
1k
0.01
100
16V
16V
1000p
2200p
1M
220k
0
47k
100k
0.1
0.01
100p
1000p 0.01
0.01
0.1
1k
0.01
0
1k
0
47k
100k
100k
100k
47k
47k
100
0.01
47k
100
10k
10k
1SS133
1SS133
100
100
1SS133
1SS133
470
470
CXA1019S
MTZJ-13B
1M
1SS119
0
0
10k
4.7k
4.7k
18P
LM8562
9P
2SA1602TP-1EF
0.022
2SA1602TP
-1EF
RT1N241M-TP-1
1SS133
2SC4154TP-1EF
2SA1602TP
-1EF
4P
KTC3203Y-AT
1000
10V
470
1
50V
0
0.1
100k
50k
POWER
TRANSFORMER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
D100
GND
GND
FM
NF
VOL
AM
AFC
FM
REG
FM
AM
NC
FM
FE
FM/AM
DISCRI
OSC
OSC
OUT
RF
RF
IN
IN
GND
IF/OUT
GND
GND
OUT
VCC
FILTER
IN
OUT
AGC
AGC
GND
METER
NC
IN
IN
SELECT
AF
RIPPLE
AF
DET
AFC
AFC
IF
IF
FM
IF
AM
BAND
FM/AM
VDD
DIMMER
SELECT
INPUT
INPUT
INPUT
SET
OUTPUT
OUTPUT
OUTPUT
DOWN
OSC
RT-TIME
MODE
50/60MHz
ON/OFF
TIME
SELECT
ALM-1
ALM-2
ALM
RADIO
SPEED
POWER
CR
HR AG&DE
HR B
C&HR E
HR B&G
HR C&D
HR A&F
A&F
B&G
10'S HR
10'S MIN
10'S MIN
C&D
10'S MIN
10'S MIN
E&MIN E
MIN B&G
MIN C&D
MIN A&F
COL OUT
SLP/SNZ
PM10'S
AM10'S
(SP)
(KR)
AM IF
IN
RF
AM OSC
FM
OSC
FM
RF
AM
FERRITE-ROD
ANTENNA
ANTENNA
FM LEAD
LED DISPLAY UNIT
(FM ANT)
MODE CONTROL,
LED DRIVER
VDD
1
9
FM/AM FRONT END,
FM/AM IF AMP,
DET,AGC,AF AMP
MUTING
VOL
TUNE
CV1
BAND
FM
AM
1
4
1
4
HIGH
LOW
ALARM VOL
DRY BATTERY
SIZE"6F22"
(IEC DESIGNATION 6F22)
1PC. 9V
POWER BACK UP
FOR CLOCK
AC IN
DETECT
DETECT
DC IN
RIPPLE FILTER
BUZZER ON SWITCH
(TIMER)
DIMMER
BRIGHTNESS
FAST
-
FAST
+
+
TIME SET
1
18
S102
ALARM TIME/CLOCK SET
CLOCK
BUZZER
RADIO
HOLD
-2
-1
(ALARM MODE)
RADIO+BUZZER BUZZER RADIO OFF
(ALARM MODE)
SLEEP
RADIO ON
RADIO OFF
ALARM RESET
4
1
SNOOZE
(AC IN)
RADIO ON SWITCH
•
See page 9 for Waveform.
•
See page 13 for IC Block Diagrams.
Ver. 1.2
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