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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

C

 2002.07

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

/

8

 inches) dia. 8 

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

/

2

 inches) 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.

Summary of Contents for Dream Machine ICF-C490

Page 1: ...z AM 530 1 710 kHz Speaker Approx 6 6 cm 2 5 8 inches 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 2 inches not incl projecting parts and cont...

Page 2: ...inet Section 12 5 2 Chassis Section 12 6 ELECTRICAL PARTS LIST 13 SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON 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...

Page 3: ...ay 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 3 Press 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...

Page 4: ...embly 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 assy 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 ...

Page 5: ... 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 ...

Page 6: ... 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 Adju...

Page 7: ...N 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 ...

Page 8: ...ACKING 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 S105 S104 M H 17 50 60Hz INPUT 25 FM AM NORMAL LOUD QUIET AM 10 S HR ...

Page 9: ...tified 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 AM Voltages are taken with 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 1...

Page 10: ...ARD 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...

Page 11: ...01 1k 100 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 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 AM OSC AFC FM OSC REG OUT FM RF NC FE GND FM AM FM RF IN RF IN AM D...

Page 12: ...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...

Page 13: ...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 ...

Page 14: ...P 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 ...

Page 15: ...0K 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 0 or dotted line with mark 0 are critical for safety Replace only with part number specified POWER ...

Page 16: ...p 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 ...

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