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FLOW CHART NO.1
The power cannot be turned on.
FLOW CHART NO.2
The key operation is not functioning.
Is approximately +5V voltage supplied to Pin(1) of CN1
on the Function CBA Unit?
FLOW CHART NO.3
No operation is possible from remote control unit. (Operation is possible from the unit.)
Is the "L" pulse sent out to Pin(3) of CN1 on the
Function CBA Unit?
TROUBLESHOOTING
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Check F101 and service it if defective.
Or replace Power Supply CBA Unit.
No
See FLOW CHART NO.2 <The key operation is not
functioning.>
No
See FLOW CHART NO.3 <No operation is possible
from remote control unit. (Operation is possible from
the unit.)>
No
Replace Digital Main CBA Unit.
No
Replace Power Supply CBA Unit.
No
Replace Power Supply CBA Unit.
No
Replace Function CBA Unit.
No
Check the connector (CN1, CN9), wire assembly and
service it if defective. Or replace Function CBA Unit.
8-1
A23F0TR
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