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33
I.
TROUBLESHOOTING FLOW CHART
Power compensation
does not operate.
NO
YES
YES
YES
When mains is unplugged,
is 3.6V at pin 26,pin 81 of IC501?
Check C548, C523,
C547, C524.
NO
Is (sine) signal applied to
pin 42 and 43 of IC501?
Check X502.
NO
Is 5V at pin 37 of IC501?
Check reset circuit
Of IC503.
Check IC501.