Video Circuit - Daewoo DV6T812N Service Manual

3. VIDEO circuit

A. EE screen doesn't appear
EE screen doesn't appear.
YES
Is Video signal input at IC301
pin#48,50,52,54?
YES
Is 5V obtained at IC301
pin#54, 42, 55, 72?
YES
Is signal output at IC301
pin#65?
YES
Signal output at IC301 pin#65 is
transferred to IC301 pin#56?
YES
Is signal output at IC301
pin#61 or #63?
YES
Is signal input at IC302
pin#12 or #13?
YES
Is signal input at IC302
pin#14?
YES
Is signal input at IC601
pin#50?
YES
Is Y signal input at IC604
pin#6?
YES
Is C-Sync signal output at
IC604 pin#3?
YES
Is C-Sync signal input at
IC601 pin#58?
YES
Is signal output at IC601
pin# 52?
YES
Check RF Output.
NO
Check LINE JACK and IF circuit.
Check DVD circuit.
NO
Check POWER 5V.
NO
Check IC301
pin #70,62,68,69.
NO
Check PCB Pattern.
NO
Check IC301
pin #68,69,70,62
NO
Check PCB Pattern.
NO
Check IC302 pin #11
NO
Check PCB Pattern.
NO
Check PCB Pattern.
NO
Is 5V obtained at IC604
pin#7?
YES
Is C-Sync signal input at IC601
pin#58?
NO
Check PCB Pattern.
NO
Is 5V obtained at IC601
pin#53,98,99?
YES
Check IC 601
Check
NO
Check PCB Pattern.
NO
Check POWER circuit.
11
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