Service manual

21
6. Unstable Picture
6-1. Horizontal
Unstable
picture
Is the
pulse of pin26 of
the IC501
correct?
Trouble in IC501
or its ambient circuits.
Is the
pulse of pin 42 of
the IC201
correct?
Check IC201 and its
ambient circuits.
Check IC201 and its
ambient circuits.
NO
Is the
input H.Sync
correct?
Yes
NO
Yes
NO
5Vpp
5Vpp
0.7Vpp
Yes
Trouble in Signal Cable
or 15P D-Sub Connector.