Sharp LC 20M4U, Руководство по обслуживанию

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15
LC-20M4U
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Check all the settings microprocessor's adjust process menu.
Is source GND normal? Is CSCOM waveform normal?
Check R1212 and its peripheral parts.
Check IC1109, Q1101, Q1102, D1101, R1120, R1130 and their peripheral parts.
Check R1231 and its peripheral parts.
Yes
No No
Becomes dark
No
Time passes, becomes dark
Is gate GND normal? Is gate clock (GCK) normal?
Is output at pin (3) of IC1205 normal?
Yes
No
Check D1201 and its peripheral parts.
No
Is B-5.5V being outputted? Is VCC being outputted?
Check T701's sec5V outputs line.
Yes
No
Is GSP waveform normal?
Check R1223 and its peripheral parts.
Yes
No
Check R1223 and gate array peripheral parts.
Becomes white.
Is 3.3V VSH being outputted? Is source clock (CK) normal?
Check +3.3V outputs line of IC781.
Check R1210, R1211 and their peripheral parts.
Check FB1203 and gate array peripheral parts.
Is output of LBR and HG normal?
Yes Yes
No No No
Vertical line output
TROUBLE SHOOTING TABLE
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