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6. Unstable Picture
6-1. Horizontal
Unstable
picture
Is the
pulse of pin 26 of
the IC501
correct?
Trouble in IC501
or its ambient
circuit
Is the
pulse of pin 28 of
the IC201
correct?
Check IC501 and
its ambient circuit
No
No
No
Yes
Yes
Is the
input H.Sync
correct?
Check IC201 and
its ambient circuit
Yes
Trouble in Signal Cable
or 15P D-Sub Connector
5Vpp