Technical information

2120
6-2. Vertical
Unstable
picture
Is the
14V,-13V
line voltage is
correct?
Refer to P. S. U
Is the
pulse of pin 5 of
the IC401
correct?
Trouble in
vertical D. Y
No
No
No
Yes
Yes
Is the output
of pin 23 of IC501
all normal?
Check IC401 and
its ambient circuit
Yes
Check the IC501 and
its ambient circuit
50Vp-p
40V
-10V
6. Unstable Picture
6-1. Horizontal
Unstable
picture
Is the
pulse of pin 1 of
the IC501
correct?
Trouble in IC501
or its ambient
circuit
Is the
pulse of pin 34 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