Daewoo 526X Service Manual page 19

6-2. Vertical
40V
-10V
Unstable
picture
12V,-12Vdc
line voltage is
correct?
pulse of pin 5 of
the IC401
correct?
50Vp-p
Is the output
of pin 4 of IC501
all normal?
Check the IC501 and
its ambient circuit
Is the
No
Yes
Is the
Yes
No
Yes
No
21
Refer to P. S. U
Trouble in
vertical D. Y
Check IC401 and
its ambient circuit