41
Is the voltage of approximately +6V supplied to
+42V is not outputted.
service it if defective.
Is approximately +42V voltage supplied to the kathode of D973?
Are the contact point and the installation state of the key switches
(S701-706) normal?
Replace IC11.
Check the +42V line and service it if defective.
NO
NO
service it if defective.
Re-install the switches (S701-706) correctly or replace
the poor switch.
service it if detective.
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
FLOW CHART NO.3
FLOW CHART NO.4
FLOW CHART NO.5
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