Daewoo DF-5500(S/P) Service Manual page 13

DF-5500/DFX-5502 SVC 2006.10.14 10:6 AM
TROUBLESHOOTING
B. Playback picture doesn't appear
1) No VCR Playback Picture
PB video signal missing.
YES
Is Envelope output from 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
Same as EE MODE check.
˘ ` 12 mac001 1200DPI 80LPI
NO
Is 5V supplied at IC301 pin#91?
YES
Is SW Pulse input at IC301
pin#70?
Is 5V obtained at IC301 pin#24,
NO
42,55,72,91?
YES
Check and Replace IC301.
Does X301(4.43MHz)
NO
oscillate?
NO
Check PATTERN
NO
Check and replace IC301.
12
NO
Check POWER 5V.
NO
Check IC501 pin#18.
YES
Clean head or Replace head.
NO
Check POWER 5V.
YES
Check PATTERN
NO
Replace X301.