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6-2. V.OSC/Deflection Circuit
106KHz/85Hz
50Vpp
8Vpp
Unstable or
Abnormal picture
Is
+17Vdc, -13Vdc line
correct?
Yes
Is
the output
waveform of IC401
(pin 5) normal?
6Vpp
0
No
Is the
output pulse
of IC501 (pin 8)
normal?
No
Trouble in V.Sync line
or IC501 failure.
22
1. Trouble in P.S.U.
No
2. Check the D108(-13Vdc),
Q106(+17Vdc) and
their ambient circuit.
Yes
V.DY
failure.
Yes
Trouble in IC401 or
its ambient circuit.
6V
4V
0
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