Sony ICF-C490 / ICF-CD863 / ICF-CD863L Service Manual ▷ View online
ICF-C490
9
9
Note on Printed Wiring Board:
•
•
X
: parts extracted from the component side.
•
W
: indicates side identified with part number.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
4-2.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAM
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
• IC Block Diagrams
IC1
CXA1019S
1
2
3
4
5
6
7
8
9
10
15
14
13
12
11
FM
DISCRIMINATOR
AF POWER AMP
AM FE
FM IF
TUNING
METER
AM IF DET AGC
FM FE
23
22
21
20
24
25
19
18 17 16
29 28 27 26
30
GND
GND
AF OUT
VCC
RIPPLE
FIL
TER
AF IN
DET OUT
AFC AGC
AFC AGC
IF GND
METER
N.C
FM IF IN
AM IF IN
FM/AM BAND
SELECT
FM/AM
IF OUT
FE GND
N.C
AM RF IN
FM RF
REG OUT
FM OSC
FM RF IN
AFC
AM OSC
VOL
NF
FM DISCRI
GND
GND
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Voltages are dc with respect to ground in no-signal
(detuned) conditions.
no mark : FM
(
no mark : FM
(
) : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
: FM
f
: AM
IC101
LM8562
28
27
26
25
20 19 18
17
16 15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
AM & 10
, S
HR AG & DE
PM & 10
, S HR B
10
, S HR C & HR E
10
, S MIN A & F
10
, S MIN B & G
10
, S MIN C & D
MIN A & F
COLON OUTPUT
MIN C & D
MIN B & G
10
, S MIN E
& MIN E
HR B & G
HR C & D
HR A & F
TIME SET INPUT
VDD
VSS
SLEEP/SNOOZE
RT-TIME
SET/DIMMER
MODE
SELECT
50/60Hz
INPUT
ON/OFF INPUT
ALM DISP SELECT
ALM-2 OUTPUT
ALM-1 OUTPUT
RADIO OUTPUT
SPEED/
POWER DOWN
CR OSC
DISPLAY DECODER/DRIVER
T
T
T
T
OUTPUT
CONTROL
DISPLAY
CONTROL
PWR UP
INPUT
CONTROL
ALARM 1 CTR
ALARM 2 CTR
TIME CTR
TIME
SET
BLANK
FLASH
SLEEP
CTR
SNOOZE
CTR
STAND
BY DET
OSC
CTR
GATE
1/2
GATE
PF.
DET
SEC
CTR
CTR
1/25 or 1/30
INNER
OSC
CONTROL
GATE
COMP.
CONTROL
RESET
CONTROL
T
T
T
T
24
23
22
21
ON
OFF
50/60 SEL
12/24 SEL
SEC,TIME,ALARM 1/2,SLEEP
RESET
U/D
SET CK
DIMMER
RT-SET
2Hz
1Hz
RESET
THREE
INPUT
CIRCUIT
ICF-C490
10
10
E C B
Q101
R123
R130
R118
R101
R107
R116
R106
R136
C121
E C B
Q102
R117
R128
C108
C110
C109
C112
C113
R121
C119
C107
R127
C106
R115
C105
R114
R120
JC101
C116
R104
C117
R5
R4
R11
JC102
R109
R111
R119
C104
R112
C103
Q103
B C E
R125
R139
−2
−1
R113
C115
R126
R129
R110
R14
C120
R124
E C B
Q1
C118
R122
R132
R131
JC4
JC1
R7
16
15
1
30
R6
C10
R8
C5
R15
C8
C13
C17
C14
C18
C6
R3
R2
JC2
JC5
C2
R1
C1
C21
C3
R108
R135
R138
S105
JW111
JW108
JW130
JW107
JW106
JW105
JW104
D107
D106
JW102
JW103
JW101
D105
C111
+
1
7
JW113
IC101
1
14
15
28
1
16
C114
+
S103
JW109
D101
JW116
JW114
JW117
JW129
D104
JW118
S104
JW124
D108
JW120
JW122
S108
JW119
JW115
JW110
JW121
S109
D103
D102
JW123
JW125
S106
L2
S107
JW127
JW3
C7
+
JW6
C20
+
1
4
JW1
CF3
C11
+
C12
+
C19
+
JW2
JW4
+
C16
+
C15
Q2
C9
+
CF1
CF2
IC1
CV1
T1
L4
L3
S1
RV1
(11)
11
1-684-733-
MAIN BOARD
BAND
S1
FM
AM
TP
(SP−)
TP(SP+)
VOL
RV1
SP1
CV1-4
CT1-4
CT1-1
CV1-1
CV1-3
CT1-3
CT1-2
CV1-2
TUNING
L1
AM FERRITE-ROD
ANTENNA
ALARM RESET
RADIO ON
ALARM RESET
RADIO OFF
TP
(FM ANT)
W7
FM LEAD ANTENNA
SLEEP
SNOOZE
LED101
(LED DISPLAY)
TIME SET
FAST +
S101
ALARM MODE
S103
TIME SET +
RADIO+BUZZER
BUZZER
RADIO
S111
BUZZER VOLUME
QUIET
NORMAL
LOUD
CLOCK
BUZZER
RADIO
HOLD
OFF
−1
−2
TIME SET
FAST
−
ALARM TIME/
CLOCK SET
S102
(SINGAPORE)
W5
S110
BRIGHTNESS
LOW
HIGH
1
4
D202
D201
LED BOARD
(11)
11
1-684-735-
ALARM
BUZZER
ALARM
RADIO
R301
C304
C303
EC
B
Q301
T301
POWER
TRANSFORMER
(AC IN)
PC1
C302
+
C301
+
PS301
D303
D302
R304
R305
D305
POWER BOARD
(11)
11
1-684-734-
1
7
DRY BATTERY
6F22
(IEC DESIGNATION 6F22)
1PC. 9V
RED
BLK
POWER BACK UP
FOR CLOCK
A
B
C
D
E
F
G
H
I
1
2
3
4
5
6
7
8
9
10
11
4-3.
PRINTED WIRING BOARDS
D101
C-8
D102
B-6
D103
B-6
D104
B-7
D105
E-9
D106
D-10
D107
D-10
D108
C-7
D201
G-5
D202
G-4
D302
H-8
D303
H-8
D305
G-6
IC1
D-3
IC101
D-8
LED101
F-7
Q1
E-5
Q2
E-3
Q101
C-9
Q102
C-9
Q103
C-6
Q301
G-7
• Semiconductor
Location
Ref. No.
Location
ICF-C490
11
11
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
C3
C2
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
S105
S103
S104
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
L3
L2
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
5p
27p
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
50V
10
50V
0.022
0.1
22
25V
470
10V
10V
1
0.47
0.47
220
10V
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
16V
16V
1M
0.01
0.01
10k
47k
47k
100k
10k
100k
47k
100
22
22
100
1SS119
1SS119
0.01
0.01
470
25V
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
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
1
4
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
FM
FM
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
HOLD
RADIO
BUZZER
CLOCK
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
1
7
1
7
POWER
TRANSFORMER
(AC IN)
BRIGHTNESS
HIGH
LOW
S109
S110
LED101
4
1
6F22
(SINGAPORE)
(AUSTRALIAN)
ICF-C490
12
SECTION 5
EXPLODED VIEWS
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
delay should be anticipated when ordering
these items.
• Accessories are given in the last of the elec-
trical parts list.
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original
one.
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
KNOB, BALANCE (WHITE) . . . (RED)
B
B
Parts Color Cabinet's Color
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
3-239-999-01 CAP (R) (AUS)
1
3-239-999-11 CAP (R) (SP)
2
3-239-996-01 CAP (L) (AUS)
2
3-239-996-11 CAP (L) (SP)
3
3-239-975-01 PLATE, TRANSPARENT
4
3-239-976-01 FRAME, ORNAMENTAL
5
3-239-978-01 PLATE, SCALE (AUS)
5
3-239-978-11 PLATE, SCALE (SP)
63-239-972-01 KNOB (CLOCK) (AUS)
63-239-972-11 KNOB (CLOCK) (SP)
7
7
3-239-971-01 KNOB (ALARM) (AUS)
7
3-239-971-11 KNOB (ALARM) (SP)
8
X-3382-433-1 CABINET (UPPER) ASSY (AUS)
8
X-3382-512-1 CABINET (UPPER) ASSY (SP)
9
3-239-977-01 KNOB (BAND)
#1
7-685-649-79 SCREW +BV 3X14, TYPE2, IT-3
#2
7-685-153-19 SCREW +P 3X30 TYPE2 NON-SLIT
3
4
5
6
7
8
9
2
1
#2
chassis section
not supplied
not supplied
#2
#2
#1
• Abbreviation
AUS : Australian model
SP
SP
: Singapore model
5-1. CABINET SECTION
The components identified by
mark
mark
0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
specified.
Ver 1.1
Click on the first or last page to see other ICF-C490 / ICF-CD863 / ICF-CD863L service manuals if exist.