Service manual

CB-31
Flowcharts
2. Shutdown
Start
Does the set
power up for
more than 2
seconds?
Does the Vp-p
level at pin 18,
IC2200 stay
below 1.0 volts?
Check
microprocessor
ciruitry.
No
Yes
Check HV-
shutdown circuit,
sweep
transformer.
Does the set
shutdown after
just 3 seconds?
Check IC2100 &
CRT protection
circuit.
Yes
Yes
No
No
Is B+ running at a
constant DC
level?
Replace
ICX3412.
No
Yes