Dial Pointer Installation; Electrical Adjustments - Sony ICF-403L Service Manual

Fm/mw/lw 3 band radio

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Operating instructions (2 pages)

Table Of Contents

Table of Contents

Enlarged version

DIAL POINTER INSTALLATION

Note : Follow the installation procedure in the numerical order given.

2 Pointer

1 Rack

Chassis

Claws

Main board

3 Screw (1.7x3)

2 Gear (A),tuning capacitor

Knob (tune)

Main board

SECTION 3

Chassis

Rack

4 Scribed line

5 Knob (tone)

3 Knob (tune)

1 Insert the rack into the chassis groove.

2 Install the pointer.

3 Install the knob (tune).

4 Slide the rack and align it with the groove on the scribed line.

5 Align the knob (tone) and the S2.

6 Install the chassis to the main board.

CV shaft

1 Turn the CV shaft all thye way counterclockwise.

2 Set the gear (A), tuning capacitor onto the CV shaft in a

direction as a figure.

3 Secure the gear (A), tuning capacitor with screw.

– 5 –

ELECTRICAL ADJUSTMENTS

TUNER SECTION

MW/LW Section

Procedure :

BAND

: MW/LW

VOLUME : MIN

AM RF signal

Put the lead-wire

generator

antenna close to

the set.

30% amplitude modulation by 400Hz

signal.

Output level : as low as possible

FM Section

Procedure :

BAND

: FM

VOLUME : MIN

FM RF signal

generator

0.01 µ F

telescopic

antenna

terminal

22.5kHz frequency deviation by

400Hz signal.

Output level : as low as possible

level meter

32 Ω

set

phone jack (J1)

Adjustment Location : Main board (Component side)

L1-2 : LW Tracking Adjustment

T1 : AM IF Adjustment

L3 : FM Tracking Adjustment

SECTION 4

• Repeat the procedures in each adjustment several times, and the

frequency coverage and tracking adjustments should be finally

done by the trimmer capacitors.

> : East European model

AM IF ADJUSTMENT