Sharp Aquos LC-20B4E, Руководство по обслуживанию

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17
LC-20B4E
TROUBLE SHOOTING TABLE
(Continued)
No picture (1/3)
Check all the settings microprocessor's adjust process menu.
Is in/output of IC801 normal?
Is in/output of IC1201 normal?
Check IC801 and its peripheral parts.
Check IC1201 and its peripheral parts.
Check LCD panel voltages and waveform.
Yes Yes
No No
No picture at all
Is voltages at pins (6), (7) and (18) tuner normal?
Is output at pin (13) of tuner normal?
Check the power line.
Check tuner and its peripheral parts.
Is input at pin (16) of IC806 normal?
Is the pin (3) of IC806 at "H" state?
Yes Yes
No No No No No
Yes
No TV output
Is the pin (48) of IC2001 at "H" state?
Yes
Check the its line. Check the its line.
Check IC806 and its peripheral parts.
Is input at pin (14) of IC806 normal?
Check V1_V line and its peripheral parts.
No
No VIDEO 2 output