Sony Dream Machine ICF-C490 User manual

SERVICE MANUAL
FM/AM CLOCK RADIO
E Model
Australian Model
SPECIFICATIONS
ICF-C490
Ver 1.1 2002.07
9-873-921-02 Sony Corporation
2002G0500-1 Personal Audio Company
C2002.07 Published by Sony Engineering Corporation
Time display
Australia: 12-hour system
Other countries: 24-hour system
Frequency range
FM: 87.5-108 MHz
AM: 530-1 710 kHz
Speaker
Approx. 6.6 cm ( 2 5/8inches) dia. 8 Ω
Power output
120 mW (at 10 % harmonic distortion)
Power requirements
Australia: 240 V AC, 50 Hz
Other countries: 220-230 V AC, 50 Hz
For power backup: 9 V DC, one 6F22 battery
Battery life
Approx. 20 hours (for clock backup) using Sony
006P (6F22) battery
Dimensions
Approx. 200 ×94 ×113 mm (w/h/d)
(7 7/8×3 3/4×4 1/2inches) not incl. projecting parts and
controls
Mass
Approx. 645 g (1 lb 6.75 oz) not incl. battery
Design and specifications are subject to change
without notice.

2
ICF-C490
TABLE OF CONTENTS
1. GENERAL .................................................................. 3
2. DISASSEMBLY
2-1. Disassembly Flow ........................................................... 4
2-2. Cabinet (Upper) Assy...................................................... 4
2-3. MAIN Board ................................................................... 5
3. ELECTRICAL ADJUSTMENTS........................ 6
4. DIAGRAMS
4-1. Block Diagram ............................................................... 8
4-2. Note for Printed Wiring Boards and
Schematic Diagram ......................................................... 9
4-3. Printed Wiring Boards.................................................... 10
4-4. Schematic Diagram ........................................................ 11
5. EXPLODED VIEWS
5-1. Cabinet Section ............................................................... 12
5-2. Chassis Section ............................................................... 12
6. ELECTRICAL PARTS LIST .............................. 13
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

3
ICF-C490
SECTION 1
GENERAL This section is extracted from
instruction manual.
SNOOZE
BUZZER
TIME SET
RADIO
ALARM
ALARM
RESET
HOLD
RADIO BUZZERCLOCK OFF RADIO BUZZERRADIO+BUZZER
ALARM MODEALARM TIME/CLOCK SET
BUZZER VOLUME BRIGHTNESS
LOW HIGH
FAST SLEEPFAST RADIO
ON
RADIO
OFF
BAND
VOL TUNING
AM FM
AC power cord
Cordon d’alimentation
secteur
Netzkabel
FM wire antenna
Fil d’antenne FM
UKW-Wurfantenne
Indicator
Indicateurs
Anzeige
Stand
Support
Ständer
There is a tactile dot beside volume to show the
direction to turn up the volume.
Un point tactile, situé à côté de la molette de volume,
indique le sens dans lequel il faut tourner pour
augmenter le volume.
Neben dem Lautstärkeregler befindet sich ein
fühlbarer Punkt. Dieser gibt die Richtung an, in der
man die Lautstärke erhöht.
A
Setting the Clock
To control the visibility of the display, set
BRIGHTNESS for the display to HIGH or LOW
according to your preference.
1 Plug in the clock radio.
The display will flash “AM 12:00” or “0:00”.
2 Set the ALARM TIME/CLOCK SET
switch to CLOCK .
3Press FAST+ , FAST– or + to adjust the
time.
When you press FAST+, the time is raised
rapidly.
When you press FAST–, the time is lowered
rapidly.
When you press +, the time is raised in one-
minute steps.
4 Set the ALARM TIME/CLOCK SET
switch to HOLD .
Make sure that the ALARM TIME/CLOCK SET
switch is set to HOLD. When it is set to HOLD,
you cannot see the red label underneath.
Otherwise, the displayed time might be
changed if FAST+, FAST– or +happens to be
pressed.
The clock system varies depending on the model
you own.
12-hour system: “AM 12:00”=midnight
24-hour system: “0:00”=midnight
To display minute and second, press SNOOZE.
Example: When the current time is 7:15:10, the
display will become:
7:15 , 5:10
Lower of minute digit Second digits
The display returns to the current time when you
release SNOOZE.
To adjust the time exactly to the second, press +
briefly with the time signal.

ICF-C490
4
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
2-2. CABINET (UPPER) ASSY
3 screw (P3 × 14)
S101
1 cap (R)
4 screw (P3 × 30)
2 screw (P3 × 30)
1 cap (L)
2 screw (P3 × 30)
S102
5 cabinet (upper) ass
y
knob (alarm)
knob (clock)
Note :When installing
cabinet (upper) assy,
adjust S102, S101 and
the knobs (clock, alarm).
SET
2-2. CABINET (UPPER) ASSY
(page 4)
2-3. MAIN BOARD
(page 5)

ICF-C490
5
2-3. MAIN BOARD
•MAIN BOARD SETTING
1 knob (band)
qs claw
3
2
screw (P3 × 14)
qd main board
6 speker (6.6 cm) (SP1)
5 LED board
9 washer
8 two screws
(P3
× 14)
7 screw
(PTPWH3
× 8)
qa power cord (PC1)
0 power board
9 washer
4 antenna (wire) (W7
)
knob (vol)
knob (tuning
)
B
A
RV1
shaft of CV1
Note 1 : When installing the main board,
adjust RV1 and the knob (vol).
Note 2 : When installing the main board,
turn the shaft of CV1 in the direction
of arrow A fully and the knob (tuning)
in the direction of arrow
B fully
before adjusting the shaft of CV1
and the knob (tuning).

6
ICF-C490
0 dB = 1 µV
[AM]
Setting:
BAND switch: AM
[FM]
Setting:
BAND switch: FM
•Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
•Remove FM antenna in FM adjustments.
Adjustment Location: MAIN board (See page 7)
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level mete
r
MAIN board
TP (SP –)
MAIN board
TP (SP +)
set
MAIN board
TP (FM ANT)
8 Ω
0.01 µF
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1 455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L4 515 kHz
CT1-4 1,750 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 600 kHz
CT1-1 1,400 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L3 86.5 MHz
CT1-3 109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L-2 86.5 MHz
CT1-2 109.5 MHz
SECTION 3
ELECTRICAL ADJUSTMENTS
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level mete
r
set
8 Ω
MAIN board
TP (SP –)
MAIN board
TP (SP +)

ICF-C490
77
Adjustment Location :
– MAIN BOARD (Component Side) –
– MAIN BOARD (Conductor Side) –
FM Frequency Coverage Adjustment
T1
AM IF Adjustment
TP
(FM ANT)
TP
(SP –)
TP
(SP +)
L3
CT1-3



FM Tracking Adjustment
CT1-2
L2



AM Frequency Coverage Adjustment
CT1-4
L4




AM Tracking Adjustment
CT1-1
L1




ICF-C490
88
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
D202
ALARM
BUZZER
D201
ALARM
RADIO
S101-1
ALARM MODE
BRIGHTNESS
RV1
VOL
S107
ALARM RESET
RADIO ON
• SIGNAL PATH
: FM
: AM
13
10
15 18
11
6 8
FM
FRONT-END
FM
IF AMP
AF
POWER AMP
AM IF AMP,
AGC, DET
AM
FRONT-END 17
20
FM
RF IN
FM/AM
IF OUT CF3
CF2
CF1
FM
RF
FM
IF IN
3FM
DISCRIMINATOR
TUNING METER
FM
DISCRI
28
AF
OUT
SP1
AF
IN
24 25
DET
OUT
AM
IF IN
METER
NF VOL
16 5
FM/AM
BAND
SELECT
AM OSC
L4
AM OSC
L3
FM OSC
L1
AM FERRITE-ROD
ANTENNA
W7
FM LEAD
ANTENNA
FM OSC
AM
RF IN
9REG OUT
B+
L2
FM RF
FM/AM FRONT-END,
FM/AM IF AMP, DET, AGC, AF AMP
IC1
MODE CONTROL, LED DRIVER
IC101
CV1-2 CT1-2
+
+
CT1-3, L3
FM FREQUENCY
COVERAGE
CV1
TUNING
S103
TIME SET +
S104
TIME SET FAST +
S105
TIME SET FAST –
POWER BACK UP
FOR CLOCK
S106
ALARM RESET
RADIO OFF
CT1-1, L1
AM TRACKING
CT1-2, L2
FM TRACKING
T1
AM IF
MUTING
Q1
PC1
IC1 B+
IC101 B+
ALM-2 OUTPUT
20
RADIO OUTPUT
18
ALM-1 OUTPUT
19
D305
IC101 B+
IC101 B+
RECT
D302, 303
RIPPLE FILTER
Q2
SWITCH
Q301
T301
POWER
TRANSFORMER
RECT
D106, 107
S1
BAND
S111
BUZZER VOLUME
CV1-1
CT1-1
CV1-4
CT1-4
CV1-3
CT1-3
HOLD
RADIO
BUZZER
CLOCK
CV1
TUNING
SPEED
POWER
DOWN
Q103
SWITCHING
IC101 B+
S105S104
"M" "H"
17
50/60Hz INPUT 25
FM
AM
NORMAL
LOUD
QUIET
AM & 10´S HR AG & DE
1
PM & 10´S HR B
2
10´S HR C & HR E
3
HR B & G
4
HR C & D
5
HR A & F
6
10´S MIN A & F
7
10´S MIN B & G
8
10´S MIN C & D
9
10´S MIN E & MIN E
10
MIN B & G
11
MIN C & D
12
MIN A & F
13
TIME SET
22
ON/OFF INPUT
23
LED101
LED DISPLAY
S103
"L"
S107S106
"L" "H"
SLP/SNZ INPUT
24
S108S109
"L" "H"
ALARM SELECT
21
MODE SELECT
26
DRY BATTERY
6F22
(IEC DESIGNATION 6F22)
1PC. 9V
CT1-4, L4
AM FREQUENCY
COVERAGE
S108
SLEEP
S109
SNOOZE
(Singapore)
S102
S102-1
ALARM TIME/
CLOCK SET
RT-TIME DIMMER
27
S102-2
S110
LOW
HIGH
RADIO+BUZZER
BUZZER
RADIO
OFF
D103
D102
S101-2
ALARM MODE
RADIO+BUZZER
BUZZER
RADIO
OFF
D108
D104
Q101
SWITCHING
SWITCH
Q102
(AC IN)
4

ICF-C490
99
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 µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
•All resistors are in Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•C: panel designation.
•IC Block Diagrams
IC1 CXA1019S
12 3 45 6 7 8 9 10 15141312
11
FM
DISCRIMINATOR
AF POWER AMP AM FE FM IF
TUNING
METER
AM IF DET AGC
FM FE
23 22 21 202425 19 18 17 1629 28 27 2630
GND GND AF OUT VCC RIPPLE FILTER 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 0or dotted line
with mark 0are 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
():AM
•Voltagesaretakenwith aVOM(Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
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
1/25 or 1/30
INNER
OSC
CONTROL
GATE
COMP.
CONTROL
RESET
CONTROL
T
TT 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
1010
ECB
Q101
R123
R130
R118
R101
R107
R116
R106
R136
C121
ECB
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
BCE
R125
R139
−2
−1
R113
C115
R126
R129
R110
R14
C120
R124
ECB
Q1
C118
R122
R132
R131
JC4
JC1
R7
16
151
30
R6
C10
R8
C5
R15
C8
C13
C17
C14
C18
C6
R3
R2
JC2
JC5
C2
R1
C1
C21C3
R108
R135R138
S105
JW111
JW108
JW130
JW107
JW106
JW105
JW104
D107
D106
JW102 JW103
JW101
D105
C111
+
17
JW113
IC101
1
14
15
28
116
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
+
14
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
14
D202 D201
LED BOARD
(11)
11
1-684-735-
ALARM
BUZZER
ALARM
RADIO
R301
C304 C303
ECB
Q301
T301
POWER
TRANSFORMER
(AC IN)
PC1
C302
+
C301
+
PS301
D303 D302
R304
R305
D305
POWER BOARD
(11)
11
1-684-734-
17
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
1111
4-4. SCHEMATIC DIAGRAM • See page 9 for IC Block Diagrams.
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replaceonly 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
10.47 0.47
220
10V
1k
0
0.01
10
50V
1000p 47
1
50V
2.2k
47k
15k
0
0.1
22k 3.3k 4 7k
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
GND
GND
NF
VOL
AMOSC
AFC
FM OSC
REGOUT
FM RF
NC
FE GND
FM/AM
FM
RF IN
RF IN
AM
DISCRI
FM
FM/AM
BAND
SELECT
AM
IF IN
IF IN
NC
FM
METER
IF GND
AGC
AFC
AGC
AFC
DET
OUT
AF IN
RIPPLE
FILTER
AF OUT
VCC
GND
GND
COL OUT
MIN A&F
MIN C&D
MIN B&G
10'S MIN
E&MIN E
10'S MIN
C&D
10'S MIN
B&G
10'S MIN
A&F
HRA&F
HR C&D
HRB&G
10'S HR
C&HRE
PM&10'S
HR B
AM&10'S
RT-TIME
DIMMER
MODE
SELECT
50/60Hz
INPUT INPUT SLP/SNZ INPUT ON/OFF
TIME
SET ALM SELECT ALM-2 OUTPUT OUTPUT ALM-1 OUTPUT RADIO
SPEED
POWER DOWN CROSC
HRAG&DE
14
16 1
VSS
(LED DISPLAY)
COG314TOE1
COG314TOA1
ALARM
BUZZER
ALARM
RADIO
MODE CONTROL,
LED DRIVER
VDD
BUZZER
RADIO+BUZZER
RADIO
OFF
ALARM MODE
S101
SWITCHING
VOL
MUTING
FM
AM
BAND
CV1
TUNING
AM OSC
CV1-4
CT1-4
CV1-3
CT1-3
CT1-2
CV1-2
CT1-1
CV1-1
OSC
FMFM
RF
FERRITE-ROD
ANTENNA
AM
ANTENNA
FM LEAD
IF OUT
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 -
(SINGAPORE)
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)

ICF-C490
1212
53
54
66
59
65
65
PC1
57
58
60
61
62
63
64
55
55
52
51
W7
main board
not supplied
L1
#1
#1 #1
#3
SP1 T301
LED101
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.
•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.
•Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑↑
Parts Color Cabinet's Color
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
13-239-999-01 CAP (R) (AUS)
13-239-999-11 CAP (R) (SP)
23-239-996-01 CAP (L) (AUS)
23-239-996-11 CAP (L) (SP)
33-239-975-01 PLATE, TRANSPARENT
43-239-976-01 FRAME, ORNAMENTAL
53-239-978-01 PLATE, SCALE (AUS)
53-239-978-11 PLATE, SCALE (SP)
63-239-972-01 KNOB (CLOCK) (AUS)
63-239-972-11 KNOB (CLOCK) (SP)
73-239-971-01 KNOB (ALARM) (AUS)
73-239-971-11 KNOB (ALARM) (SP)
8X-3382-433-1 CABINET (UPPER) ASSY (AUS)
8X-3382-512-1 CABINET (UPPER) ASSY (SP)
93-239-977-01 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
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
*51 A-3021-915-A MAIN BOARD, COMPLETE (SP)
*51 A-3021-923-A MAIN BOARD, COMPLETE (AUS)
52 3-239-974-01 HOLDER (FERRITE-ROD ANTENNA)
53 3-933-547-01 SHEET (BAND)
*54 1-684-735-11 LED BOARD
55 3-231-250-01 WASHER
57 3-239-970-01 KNOB (TUNING)
58 3-239-973-01 POINTER
*59 1-684-734-11 POWER BOARD
60 3-919-268-01 KNOB (VOL)
61 3-239-968-01 STAND
62 3-239-967-11 CABINET (LOWER) (SP)
62 3-239-967-31 CABINET (LOWER) (AUS)
63 3-369-135-21 LID, BATTERY CASE
64 3-368-852-01 FOOT
65 1-535-771-31 TERMINAL
66 3-243-988-01 SPACER
L1 1-419-532-11 COIL, FERRITE-ROD ANTENNA (MW)
LED101 6-500-195-01 LED COG3140E1 (LED-DISPLAY) (SP)
LED101 6-500-196-01 LED COG3140A1 (LED-DISPLAY) (AUS)
0PC1 1-790-431-12 CORD, POWER (AUS)
0PC1 1-555-795-00 CORD, POWER (SP)
SP1 1-529-456-13 SPEAKER (6.6cm)
0T301 1-435-961-21 TRANSFORMER, POWER
W7 1-754-135-11 ANTENNA (WIRE) (FM)
#1 7-685-649-79 SCREW +P 3X14 TYPE2 NON-SLIT
#3 7-685-903-21 SCREW +PTPWH 3X8 (TYPE2)
•Abbreviation
AUS:Australian model
SP : Singapore model
5-1. CABINET SECTION
5-2. CHASSIS SECTION
The components identified by
mark 0or dotted line with mark
0are critical for safety.
Replace only with part number
specified.
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replace only with part number specified.
Ver 1.1

13
ICF-C490
SECTION 6
ELECTRICAL PARTS LIST
*1-684-735-11 LED BOARD
**********
3-243-988-01 SPACER
< LED >
D201 6-500-033-01 LED TOL-50BHRBKEA-KS04 (ALARM RADIO)
D202 6-500-033-01 LED TOL-50BHRBKEA-KS04
(ALARM BUZZER)
**************************************************************
*A-3021-915-A MAIN BOARD, COMPLETE (SP)
*A-3021-923-A MAIN BOARD, COMPLETE (AUS)
*********************
3-239-974-01 HOLDER (FERRITE-ROD ANTENNA)
< CAPACITOR >
C1 1-162-918-11 CERAMIC CHIP 18PF 5% 50V
C2 1-164-405-11 CERAMIC CHIP 27PF 5% 50V
C3 1-162-936-11 CERAMIC CHIP 5PF 0.25PF 50V
C5 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C6 1-113-619-11 CERAMIC CHIP 0.47uF 10V
C7 1-126-964-11 ELECT 10uF 20% 50V
C8 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C9 1-126-960-11 ELECT 1uF 20% 50V
C10 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C11 1-126-963-11 ELECT 4.7uF 20% 50V
C12 1-126-964-11 ELECT 10uF 20% 50V
C13 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C14 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C15 1-128-551-11 ELECT 22uF 20% 25V
C16 1-126-935-11 ELECT 470uF 20% 10V
C17 1-115-156-11 CERAMIC CHIP 1uF 10V
C18 1-113-619-11 CERAMIC CHIP 0.47uF 10V
C19 1-104-665-11 ELECT 100uF 20% 10V
C20 1-126-934-11 ELECT 220uF 20% 10V
C21 1-162-908-11 CERAMIC CHIP 3PF 0.25PF 50V
C103 1-162-967-11 CERAMIC CHIP 0.0033uF 10% 50V
C104 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C105 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C106 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C107 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C108 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C109 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C110 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C111 1-126-933-11 ELECT 100uF 20% 16V
C112 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C113 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C114 1-126-960-11 ELECT 1uF 20% 50V
C115 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C116 1-107-826-11 CERAMIC CHIP 0.1uF 10% 16V
C117 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C118 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C119 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C120 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C121 1-164-505-11 CERAMIC CHIP 2.2uF 16V
< CERAMIC FILTER >
CF1 1-781-859-71 DISCRIMINATOR, CERAMIC
CF2 1-781-790-11 FILTER, AM CERAMIC
CF3 1-567-802-71 FILTER, CERAMIC
< VARIABLE CAPACITOR >
CV1 1-141-522-11 CAP, VAR (TUNING)
< DIODE >
D101 8-719-911-19 DIODE 1SS119-25
D102 8-719-911-19 DIODE 1SS119-25
D103 8-719-911-19 DIODE 1SS119-25
D104 8-719-911-19 DIODE 1SS119-25
D105 8-719-921-88 DIODE MTZJ-13B
D106 8-719-911-19 DIODE 1SS119-25
D107 8-719-911-19 DIODE 1SS119-25
D108 8-719-911-19 DIODE 1SS119-25
< IC >
IC1 8-752-037-02 IC CXA1019S
IC101 8-759-823-50 IC LM8562
< SHORT >
JC1 1-216-864-11 SHORT CHIP 0
JC2 1-216-864-11 SHORT CHIP 0
JC4 1-216-864-11 SHORT CHIP 0
JC5 1-216-864-11 SHORT CHIP 0
JC101 1-216-864-11 SHORT CHIP 0
JC102 1-216-864-11 SHORT CHIP 0
LED MAIN
NOTE:
•Due to standardization, replacements in the
parts list may be different from the parts speci-
fied in the diagrams or the components used
on the set.
•-XX and -X mean standardized parts, so they
may have some difference from the original
one.
•RESISTORS
All resistors are in ohms.
METAL: Metal-film resistor.
METAL OXIDE: Metal oxide-film resistor.
F: nonflammable
•Items marked “*” are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when order-
ing these items.
•SEMICONDUCTORS
In each case, u: µ, for example:
uA. . : µA. . uPA. . : µPA. .
uPB. . : µPB. . uPC. . : µPC. .
uPD. . : µPD. .
•CAPACITORS
uF: µF
•COILS
uH: µH
The components identified by
mark 0or dotted line with mark
0are critical for safety.
Replace only with part number
specified.
When indicating parts by reference
number, please include the board.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
•Abbreviation
AUS:Australian model
SP : Singapore model

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
14
ICF-C490
MAIN POWER
< COIL >
L1 1-419-532-11 COIL, FERRITE-ROD ANTENNA (MW)
*L2 1-422-320-11 COIL, AIR-CORE
L3 1-422-131-00 COIL, FM OSCILLATION
L4 1-419-533-11 COIL, OSCILLATION (AM)
< LED >
LED101 6-500-195-01 LED COG314TOE1 (LED DISPLAY) (SP)
LED101 6-500-196-01 LED COG314TOA1 (LED DISPLAY) (AUS)
< TRANSISTOR >
Q1 8-729-216-22 TRANSISTOR 2SA1162-G
Q2 8-729-011-92 TRANSISTOR 2SC2001TP-K1K2
Q101 8-729-120-28 TRANSISTOR 2SC1623-L5L6
Q102 8-729-901-00 TRANSISTOR DTC124EKA
Q103 8-729-120-28 TRANSISTOR 2SC1623-L5L6
< RESISTOR >
R1 1-216-827-11 METAL CHIP 3.3K 5% 1/10W
R2 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R3 1-216-805-11 METAL CHIP 47 5% 1/10W
R4 1-216-835-11 METAL CHIP 15K 5% 1/10W
R5 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R6 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R7 1-216-815-11 METAL CHIP 330 5% 1/10W
R8 1-216-821-11 METAL CHIP 1K 5% 1/10W
R11 1-216-841-11 METAL CHIP 47K 5% 1/10W
R14 1-216-827-11 METAL CHIP 3.3K 5% 1/10W
R15 1-216-864-11 METAL CHIP 0 5% 1/10W
R101 1-216-833-11 METAL CHIP 10K 5% 1/10W
R104 1-216-842-11 METAL CHIP 56K 5% 1/10W
R106 1-216-841-11 METAL CHIP 47K 5% 1/10W
R107 1-216-827-11 METAL CHIP 3.3K 5% 1/10W
R108 1-216-815-11 METAL CHIP 330 5% 1/10W
R109 1-216-837-11 METAL CHIP 22K 5% 1/10W
R110 1-216-815-11 METAL CHIP 330 5% 1/10W
R111 1-216-833-11 METAL CHIP 10K 5% 1/10W
R112 1-216-848-11 METAL CHIP 180K 5% 1/10W
R113 1-216-841-11 METAL CHIP 47K 5% 1/10W
R114 1-216-839-11 METAL CHIP 33K 5% 1/10W
R115 1-216-845-11 METAL CHIP 100K 5% 1/10W
R116 1-216-841-11 METAL CHIP 47K 5% 1/10W
R117 1-216-845-11 METAL CHIP 100K 5% 1/10W
R118 1-216-821-11 METAL CHIP 1K 5% 1/10W
R119 1-216-841-11 METAL CHIP 47K 5% 1/10W
R120 1-216-821-11 METAL CHIP 1K 5% 1/10W
R121 1-216-845-11 METAL CHIP 100K 5% 1/10W
R122 1-216-841-11 METAL CHIP 47K 5% 1/10W
R123 1-216-833-11 METAL CHIP 10K 5% 1/10W
R124 1-216-833-11 METAL CHIP 10K 5% 1/10W
R125 1-216-833-11 METAL CHIP 10K 5% 1/10W
R126 1-216-841-11 METAL CHIP 47K 5% 1/10W
R127 1-216-857-11 METAL CHIP 1M 5% 1/10W
R128 1-216-821-11 METAL CHIP 1K 5% 1/10W
R129 1-216-809-11 METAL CHIP 100 5% 1/10W
R130 1-216-809-11 METAL CHIP 100 5% 1/10W
R131 1-216-813-11 METAL CHIP 220 5% 1/10W
R132 1-216-813-11 METAL CHIP 220 5% 1/10W
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replace only with part number specified.
R135 1-247-791-11 CARBON 22 5% 1/4W
R136 1-216-833-11 METAL CHIP 10K 5% 1/10W
R138 1-247-791-11 CARBON 22 5% 1/4W
R139 1-216-809-11 METAL CHIP 100 5% 1/10W
< VARIABLE RESISTOR >
RV1 1-228-790-00 RES, VAR, CARBON 50K (VOL)
< SWITCH >
S1 1-571-738-11 SWITCH, SLIDE (BAND)
S101 1-771-904-11 SWITCH, SLIDE (ALARM MODE)
S102 1-771-904-11 SWITCH, SLIDE (ALARM TIME/CLOCK SET)
S103 1-786-050-21 SWITCH, KEY BOARD (TIME SET +)
S104 1-786-050-21 SWITCH, KEY BOARD (TIME SET FAST +)
S105 1-786-050-21 SWITCH, KEY BOARD (TIME SET FAST –)
S106 1-786-050-21 SWITCH, KEY BOARD
(ALARM RESET RADIO OFF)
S107 1-786-050-21 SWITCH, KEY BOARD
(ALARM RESET RADIO ON)
S108 1-786-050-21 SWITCH, KEY BOARD (SLEEP)
S109 1-786-050-21 SWITCH, KEY BOARD (SNOOZE)
S110 1-692-181-21 SWITCH, SLIDE (BRIGHTNESS)
S111 1-572-633-11 SWITCH, SLIDE (BUZZER VOLUME)
< TRANSFORMER >
T1 1-435-399-11 TRANSFORMER, IF
< CONNECTION CORD >
*W5 1-575-159-11 CORD, CONNECTION
< ANTENNA >
W7 1-754-135-11 ANTENNA (WIRE) (FM)
**************************************************************
*1-684-734-11 POWER BOARD
*************
1-535-771-31 TERMINAL
< CAPACITOR >
C301 1-126-941-11 ELECT 470uF 20% 25V
C302 1-126-926-11 ELECT 1000uF 20% 10V
C303 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C304 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
< DIODE >
D302 8-719-911-19 DIODE 1SS119-25
D303 8-719-052-88 DIODE 1N4002
D305 8-719-911-19 DIODE 1SS119-25
< POWER CORD >
0PC1 1-555-795-00 CORD, POWER (SP)
0PC1 1-790-431-12 CORD, POWER (AUS)
< IC LINK >
*PS301 1-533-964-41 LINK, IC

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
15
ICF-C490
< TRANSISTOR >
Q301 8-729-216-22 TRANSISTOR 2SA1162-G
< RESISTOR >
R301 1-216-845-11 METAL CHIP 100K 5% 1/10W
R305 1-247-741-11 CARBON 150 5% 1/2W
< TRANSFORMER >
0T301 1-435-961-21 TRANSFORMER, POWER
************************************************************
MISCELLANEOUS
**************
SP1 1-529-456-13 SPEAKER (6.6cm)
************************************************************
ACCESSORIES
************
3-241-419-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH,
GERMAN, DUTCH, ITALIAN,
SIMPLIFIED CHINESE)
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replace only with part number specified.
POWER

ICF-C490
REVISION HISTORY
Clicking the version allows you to jump to the revised page.
Also, clicking the version at the upper right on the revised page allows you to jump to the next revised
page.
Ver. Date Description of Revision
1.0 2002.04 New
1.1 2002.07 Correction of Part No. for CABINET (UPPER) Assy (Singapore model)
(ECN-TRA02284)