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