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21
6-2. V.OSC/Deflection Circuit
Unstable or
Abnormal picture
Is
± 13V DC line
correct?
Trouble in
power supply unit
No
Yes
Is
the output
waveform of IC401
(pin 6) normal?
V.DY
failure
Trouble in V.Sync line
or IC501 failure.
Yes
No
45Vp-p
Is the
output pulse
of IC501 (pin 23)
normal?
Trouble in IC401 or
its ambient circuit
Yes
No