Service manual

27
9-2. Vertical Size
Is
changeable the
DC voltage of
IC401 pin 1?
Trouble in
R401, C401.
Check the IC501 and
its ambient circuit
1. Trouble in IC401.
2. Check the +12Vdc line.
No
No
Trouble in R410.
Yes
Yes
Is
the waveform of
the pin5 of IC401
correct?
No
Is
changeable the DC
level of pin 8 of
the IC501?
Yes
Abnormal
V.Size
50Vpp
6Vpp
0
8Vpp
106KHz/85Hz