Unstable Picture - Daewoo 710C Service Manual

6. Unstable Picture

6-1. Horizontal
Unstable
picture
Is H.Sync
input pin of IC501
correct?
Yes
Is the
pin 4 of IC501
5V?
Yes
Trouble in IC501
Check H.Sync Out of
No
Micom or its ambient
circuits.
No
Check the value of
C505, R503
20