Sony 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
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 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
controls
Mass
Approx. 645 g (1 lb 6.75 oz) not incl. battery
Design and specifications are subject to change
without notice.

Sony ICF-C490 Specifications

General

Brand	Sony
Model	ICF-C490
Category	Clock Radio
Display Type	LCD
Tuner Type	Digital
Tuning Bands	AM/FM
Dual Alarm	Yes
Snooze Function	Yes
Sleep Timer	Yes
Alarm Type	Buzzer, Radio
Power Source	AC
Backup Power	Yes

Summary

SECTION 1 GENERAL

Setting the Clock

SECTION 2 DISASSEMBLY

Disassembly Flow

SECTION 3 ELECTRICAL ADJUSTMENTS

AM IF Adjustment

Procedure for adjusting the AM Intermediate Frequency.

AM Frequency Coverage Adjustment

Steps to adjust AM broadcast band coverage.

AM Tracking Adjustment

Process for aligning AM signal tracking.

FM Frequency Coverage Adjustment

Steps to adjust FM broadcast band coverage.

FM Tracking Adjustment

Process for aligning FM signal tracking.

SECTION 4 DIAGRAMS

Schematic Diagram