Sharp vc-ga56z, Руководство по обслуживанию

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43
VC-GA56Z VC-GH96Z
Picture E-E does not appear.
Is there picture input signal at pins(30) and (31) of IC201?
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
1
External input mode
Check the line between the rear video input terminal
and pin(30) of IC201.
2
U/V tuner mode
Check the line between the pin(25) of U/V tuner and
pin(31) of IC201.
Is there picture output signal at pin(52) of IC201?
Is there picture input signal at pin(49) of IC701?
Is there picture output signal at pin(47) of IC701 ?
Check the line between pin(52) of IC201
and pin(49) of IC701.
Check the line between pins(63) and (62) of
IC201 and pins(56) and (57) of IC701.
Is there picture output signal at emitter of
Q251(video output buffer)?
1
Line output: Check Q251 periphery and output terminal periphery.
2
RF output: Check Q251 periphery and tuner pin(6) periphery.
Does 5V input at pins(12), (61) and (90) of IC201?
Does 5V input at pin(51) of IC701?
Check the YC 5V line.
Check the AT 5V line.
Is there serial data clock signal at pins(63)
and (62) of IC201?
Check Q251 periphery.
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