Daewoo DV6T712D Service Manual page 14

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?
NO
YES
Is Video signal output at IC301
pin#65?
YES
Is Video signal output at IC302
pin#3?
YES
Is Video signal input at IC601
pin#50?
YES
Check IC604 PIN#3(C sync)
NO
Is 5V obtained at IC301
pin#91?
YES
Is SW Pulse input at IC301
pin#70?
Is 5V obtained at IC301
NO
pin#24,42,55,64?
YES
Check and Replace IC301.
Does X301(4.43MHz) oscillate?
NO
Check
Replace X301.
Pattern.
NO
Check IC301 pin# 62.68,69,70.
NO
NO
Check PCB Pattern.
NO
Check PCB pattern
NO
Check POWER 5V.
NO
Check IC601 pin#18.
YES
Check and Replace HEAD.
NO
Check POWER 5V.
YES
NO
IC302 pin#9,10,11(control
13
TROUBLESHOOTING
Check Pattern.
DC), 16(Vcc)