Sharp 61R-WP5H Service Manual page 27

No. Adjusting Point
4 Stereo separation
adjustment
(R329, R331, R301
and R313 on Tuner
Unit)
Adjusting
Conditions
Adjusting point: 1. Internal modulation:
R329, R331
Measuring terminal: 2. Monaural:
(TP301) Pin (7)
of IC301
Specification:
100 ±5mVrms
Adjusting point: 1. Internal modulation:
R301
Measuring terminal: 2. Stereo switch at ON,
(TP303) Pin (22)
of IC301
Specification:
Minimum AC
voltage 3. Stereo mode
Adjusting point: 1. Internal modulation:
R313
Measuring terminal: 2. Stereo switch at ON,
(TP303) Pin (22)
of IC301
Specification:
Minimum AC
voltage 3. Stereo mode
Modulator Settings
(Leader LMS237)
1. Connect the oscilloscope probe
400 Hz
2. Adjust the input level to
100% modulation
3. Switch the main and sub sig-
1. Connect the oscilloscope probe
300 Hz
2. Adjust the separation control
L-channel output
(30% modulation)
alone
R-channel none
1. Connect the oscilloscope probe
3 kHz
2. Adjust the separation control
L-channel output
(30% modulation)
alone
R-channel none
27
61R-WP5H
55R-WP5H
Adjusting Procedure
to (TP301) pin (7) of IC301.
282mVp-p.
nals to adjust both R329 and
R331.
to pin (22) (TP303) of IC301.
(R301) to get the AC voltage to
minimum.
to pin (22) (TP303) of IC301.
(R313) to get the AC voltage to
minimum.