Sharp LC-20SH6U Service Manual page 14
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- Operation manual (21 pages) ,
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LC-20SH6U
3-2. ADC target level adjustment
* Using the UP/DOWN keys, enter RGTAR, GGTAR, BGTAR of Service Menu Page 7
* Press CH12 of remote control, enter adjustment situation "A3 A3 A3"
* Using the LEFT/RIGHT keys, make the first A3 correspond to RGTAR, the second A3 correspond GGTAR, and
the third A3 correspond BGTAR
* It is not adjusted usually.
[4] Initialization
4-1. Ground pins (81) and (82) of IC2001 (microprocessor) and turn on the power.
4-2. Make sure the screen size is set at 20 inches.
4-3. Make sure the model number is A635A.
(Adjustment Process Menu Page 1)
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[5]
5-1. Model-by-model sending data
Separately published.
5-2. ROM collection
Separately published.
[6] Adjustment
6-1. Common bias adjustment
1) Feed a built-in signal.
2) Apply the specified instrument at the center of the screen.
3) Observe the instrument output on an oscilloscope.
4) Adjust the "COM BIAS" setting on Adjustment Process Page 2 so that the peak-to-peak of the wave be
minimized.
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