Daewoo DV6T812N Service Manual page 13

TROUBLESHOOTING
B. Playback picture doesn't appear
Playback picture doesn't
appear.
YES
Is Envelope output at IC301
pin#79?
YES
Is Y signal output at IC301
pin#46?
YES
Is Y signal input at IC301
pin#43?
YES
Is Video signal output at IC301
pin#65?
YES
Is Video signal output at IC301
pin#61?
YES
Check Sync separate circuit
and OSD circuit
NO
Is 5V obtained at IC301
pin#91?
YES
Is SW Pulse input at IC301
pin#70?
Is 5V obtained at IC301
NO
pin#21, 57?
YES
Check and Replace IC301.
NO
Does X301(3.58MHz) oscillate?
NO
Replace X301.
NO
Check IC301 pin# 62.68,69,70.
NO
NO
Check PCB Pattern.
12
NO
Check POWER 5V.
NO
Check IC601 pin#18.
YES
Check and Replace HEAD.
NO
Check POWER 5V.
YES
Check Pattern.