Daewoo DV6T834N, Service Manual

Page: 12 / 60

11
TROUBLESHOOTING
3. VIDEO circuit
A. EE screen doesnÕt appear
EE MODE Picture NG
Is Video signal input at
IC301 pin#28, 30, 32?
Is 5V supplied at pin#23,
45,52,68 of IC301?
Is C.S, DATA, CLOCK signal
input pin#53,54,55 of IC301?
Check IF and LINE IN JACK.
Check POWER circuit.
Check IC601
pin #61, 71, 72.
NO
YES
YES
NO
NO
YES
Is signal output from pin#26 of
IC301?
YES
NO
Check IC301
pin#24 Q-V Sync.
Is signal input into pin#50
of IC601?
YES
NO
Check PCB Pattern.
Is signal output from
pin#52 of IC601?
YES
NO
Is 5V supplied to pin#53, 98,
99 of IC601?
Is signal output at IC302
pin#15?
YES
NO
Check PCB Pattern.
Check IC 601
YES
Check POWER circuit.
NO
Is signal input at IC302
pin#1?
Check RF Output. LINE out.
YES
YES
Check IC302.
NO