Adjustment Of Sif-Input Level; Adjustment Of Stereo Separation - Sharp VC-A592U Service Manual

MTS CIRCUIT ADJUSTMENT
(HI-FI MODELS ONLY)

5-4 ADJUSTMENT OF SIF-INPUT LEVEL

Measuring AC milli-voltmeter and RF signal
instrument generator.
Mode E-E
Input signal RF CH-10 (at 300Hz 30% MOD.)
Test point AUDIO OUT jack (R channel)
Control R142(S-IF ADJ.)
Specification Right CH Output Minimum
1. Feed the RF signal CH-10 (at 300Hz 30% MOD.) to
antenna terminal.
2. Connect the AC milli-voltmeter to right channel output
terminal.
3. Set the audio signal to 300Hz and the modulation facter
to 30% (Left channel only) and adjust R142 (S-IF ADJ.)
so that the right channel output becomes minimized.

5-5 ADJUSTMENT OF STEREO SEPARATION

Measuring AC milli-voltmeter and RF signal
instrument generator.
Mode E-E
Input signal RF CH-10 (at 3kHz 30% MOD.)
Test point AUDIO OUT jack (R channel)
Control R144 (SEPARATION ADJ.)
Specification Right CH Output Minimum
1. Feed the RF signal CH-10 (at 3kHz 30% MOD.) to
antenna terminal.
2. Connect the AC milli-voltmeter to right channel output
terminal.
3. Set the audio signal to 3kHz and the modulation factor
to 30% (Left channel only) and adjust R144 (SEPARA-
TION ADJ.) so that the right channel output becomes
minimized.
4. Repeat step 5-4 ADJUSTMENT OF SIF-INPUT LEVEL,
until obtain a specification.
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VC-A592U/A593U
VC-A5933U/H992U
VC-H993U/H994U