Video Circuit - Daewoo DV6T712D Service Manual

TROUBLESHOOTING

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#24,
42, 55, 72, 91?
YES
Is signal input at IC302
pin#1,5,12,13,14,15?
YES
Is signal output at IC302 pin#3?
YES
Is signal input at IC601 pin#50?
YES
Is signal output at IC601 pin# 52?
YES
Is signal input at IC301 pin# 56?
YES
Is signal output at IC301
pin# 62, 63?
YES
Check RF Output.
NO
Check LINE JACK and IF circuit.
Check DVD circuit.
NO
Check POWER 5V.
NO
Check LINE JACK and IF circuit.
Check DVD circuit.
NO
Check IC302 pin#16VCC. Check
IC302 pin#9,10,11(control DC)
NO
Check PCB Pattern.
NO
Check IC604 pin#3(C sync).
NO
Check PCB Pattern.
NO
Check VCC of IC301 and
pin #68,69.
NO
Check LINE.
12