SHARP LC-20M4E
Manual de Servicio

LC-20M4E

1-3. Counter bias adjustment
Keep off the video input signal. Place the specified tool at the center of the screen. Observe the output of the tool on the oscilloscope screen. Adjust the �COM BIAS� setting on the adjustment process page 2 so that the peak-to-peak level of the waveform should be minimum.

1-4. White balance adjustment
Feed the NTSC monoscope pattern signal. Adjust the �RCUTOFF� and �BCUTOFF� settings on the adjustment process page 2 so as to obtain the colour of the same level as the standard monitor. Note: For the �RCUTOFF� and �BCUTOFF� settings, keep the readings in the range of -9 to +9. If out of this range, the user-adjustable range is reduced. Adjust them in the indication value range of -9, -7, -5, -3, -1, +1, +3, +5, +7, +9 (odd numbers). When it becomes even-numbered value (include 0), side favor noise sometimes occurs in the monochrome signal of the specific gradation. Do not change the �GCUTOFF� settings (It also change the black level).

1-5. Factory setting
Set the product�s input mode, picture quality and other factors to their factory setting. There are the following two ways. q With the keys of the set In the inspection process mode, hold down both the �SELECT(v)� and �VOL (+)� buttons of the set until �SETTING COMPLETE� appears on the screen. Note: Be careful not to turn off the power, release the above two keys and press any other keys until �SETTING COMPLETE� appears on the screen. Changing on-screen display K E E

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SETTING COMPLETE

Inspection process mode
q

Factory setting

Setting complete

With the adjustment remote controller With the adjustment remote controller, make the factory settings. Either of the following remote controllers codes will do.

Key name Factory setting Factory setting

Remote controller code 100000111111110 100000001010110

Calling the Inspection process mode There are the following two ways. q With the keys of the set Hold down the �MENU� and �AV INPUT� buttons of the set and turn on the power. q With the adjustment remote controller Use the inspection process key.

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