Service manual

28
TROUBLESHOOTING HINTS
9. High Voltage Output Circuit
Trouble in FBT.
Is Q407
collector waveform
normal?
Yes
Yes
No
Trouble in IC501
ambient circuit.
Is IC501
pin 26
normal?
Yes
No
Trouble in H.V circuit
(No Raster)
Trouble in IC501
ambient circuit.
Is the
IC501
pin 1 H.trigger
correct?
Yes
No
Trouble in H.trigger.
Trouble in power
supply circuit.
Is
B+(54V) line
voltage normal?
No