Electrical Adjustments - Sony ICF-C218 Service Manual

Fm/am clock radio

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Table of Contents

TUNER SECTION

0dB=1µV

AM Section

Procedure :

BAND

: AM

VOLUME

: 10mW

AM RF signal

generator

30% amplitude modulation by 400Hz

signal.

Output level : as low as possible

FM Section

Procedure :

BAND

: FM

VOLUME

: 10mW

FM RF signal

generator

22.5kHz frequency deviation by

400Hz signal.

Output level : as low as possible

set

speaker terminal

SECTION 3

ELECTRICAL ADJUSTMENTS

Put the lead-wire

antenna close to

the set.

0.01 µ F

antenna

terminal

TP1(RF IN)

level meter

8 Ω

• Repeat the procedures in each adjustment several times, and

the frequency coverage and tracking adjustments should be

finally done by the trimmer capacitors.

AM IF ADJUSTMENT