Video Circuit - Daewoo DC-A84D1P Service Manual

3. VIDEO circuit

A. EE screen doesnÕt appear
EE MODE Picture NG
YES
Is Video signal input at
IC301 pin#48,50,52,54?
YES
Is 5V supplied at
pin#42,55,72,91of IC301?
YES
Is C.S, DATA, CLOCK signal
input pin#67,68,69 of IC301?
YES
Is signal output from pin#65 of
IC301?
YES
Is signal input into pin#50
of IC501?
YES
Is signal output from
pin#52 of IC501?
YES
Is signal input at IC301
pin#56?
YES
Is signal output at IC301
pin#61?
YES
Check RF Output.
NO
Check IF and LINE IN JACK.
NO
Check POWER circuit.
NO
Check IC501
pin #58,71,72.
NO
Check IC301
pin#62 Q-V Sync.
NO
Check PCB Pattern.
NO
Is 5V supplied to pin#53, 98,
99 of IC501?
YES
Check IC 501
NO
Check PCB Pattern
Q309, Q310.
NO
Check IC301.
Check PCB Pattern & LINE
out.
NO
Check POWER circuit.
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