8-3
A03P0TR
AL+5V is not output.
FLOW CHART NO.9
Is approximately 5V voltage supplied to the cathode
of D523?
Check if there is any leak or short-circuit on the
loaded circuit, and service it if defective.
Yes
Check D523, D524, C515 and their periphery circuit,
and service it if defective.
No
P-ON+9V is not output.
FLOW CHART NO.11
Yes
No
Is approximately 13V voltage supplied to the
collector of Q517?
Is approximately 10V voltage supplied to the
base of Q517?
No
Yes
Replace Q517.
Replace Q510.
P-ON+3.3V is not output.
FLOW CHART NO.10
Is approximately 5V voltage supplied to the collector
of Q510?
Yes
Check D523, D524, C515 and their periphery circuit,
and service it if defective.
Check D539, C522 and their periphery circuit, and
service it if defective.
Check Q508, Q520, D541, D542, P-ON-H2 line and
their periphery circuit, and service it if defective.
No
Is approximately 3.4V voltage supplied to the base
of Q510?
Yes
Check Q508, Q511, D526, P-ON-H2 line and their
periphery circuit, and service it if defective.
No
When pressing each switches (SW101B, SW103B-
SW107B) do the voltage of Pin(11) on CN403
increase?
Yes
No
FLOW CHART NO.12
Are the contact point and installation state of the key
switches (SW101B, SW103B-SW107B) normal?
Re-install the switches (SW101B, SW103B-SW107B)
correctly or replace the poor switch.
No
Check the switches (SW101B, SW103B-SW107B)
and their periphery, and service it if defective.
Yes
Replace Digital Main CBA Unit.
The key operation is not functioning.
