Sony XR-1800R Service Manual page 15

Fm/mw/lw cassette car stereo

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MW Auto Scan/Stop Level Adjustment

Setting:

[TUNER]

button: MW

AM RF signal

generator

AM dummy antenna

(50 Ω )

Carrier frequency : 999 kHz

30% amplitude

modulation by

1 kHz signal

: 33 dB (44.7 µ V)

Output level

MAIN board

TP101 (SD)

Procedure:

1. Tune the set to 999 kHz

2. Connect the digital voltmeter to TP101 (SD) on MAIN board.

3. Adjust RV1 on TU100 so that the reading on the digital volt-

meter changes point from low to high.

Adjustment Location: See page 16.

30 Ω 15 pF

65 pF

set

antenna jack (CN900)

digital

voltmeter

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