Electrical Adjustments - Sony ICF-C490 Service Manual

Fm/am clock radio

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Service manual (16 pages)

Operating instructions (3 pages)

Specifications (2 pages)

Table Of Contents

Table of Contents

ICF-C490

0 dB = 1 µV

[AM]

Setting:

BAND switch: AM

Put the lead-wire

AM RF signal

antenna close to

generator

the set.

set

30% amplitude

modulation by

400 Hz signal

Output level: as low as possible

[FM]

Setting:

BAND switch: FM

FM RF signal

MAIN board

generator

TP (FM ANT)

0.01 µF

set

22.5 kHz frequency

deviation by 400 Hz

signal

Output level: as low as possible

• 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)

SECTION 3