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Check the wave form at SG601
Collector.Does appear parabola
wave form?
Check and replace
R712,T701
T701 wave form is right?
Try Readjusting double Focus
Done
Check and replace
T701
Replace the CPT
and verify focus
YES
NO
YES
NO
NO
5-2-10 Dynamic Focus Failure or poor Focus
Others
Check the voltage at pin 21
of IC502
Normal : 5V
Push the EXIT Key : 0.5V
Push the SEL Key : 1.5V
Push the UP Key : 3.5V
Push the DOWN Key : 2.5V
Check and replace
R406,R408,R409,R410
NO
5-2-8 User control Failure
T701