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FLOW CHART NO.1
The power cannot be turned on.
Are the voltage of each pin of CN2602 and CN2603
become as shown below?
CN2603
3, 4PIN
CN2602
11-14PIN
CN2602
6PIN
FLOW CHART NO.2
P-ON+3.3V is not output.
Replace IC2602.
FLOW CHART NO.3
P-ON+6V is not output. (P-ON+3.3V is outputted normally.)
Replace IC2603.
FLOW CHART NO.4
P-ON+5V is not output.
Is approximately 6V voltage supplied to Pin(4) of
IC2605?
FLOW CHART NO.5
The key operation is not functioning.
Replace Digital Main CBA Unit.
TROUBLESHOOTING
+24V
AMP+24V
+12V
P-ON+12V
+5.3V
AL+5.3V
Yes
Yes
Yes
Yes
Yes
Yes
No
Check SW601 and their periphery circuit, and service
it if defective.
Or replace Power Supply CBA Unit.
No
No
No
See FLOW CHART NO.3 <P-ON+6V is not output.
(P-ON+3.3V is outputted normally.)>
No
Re-install the switches (SW2150-SW2156) correctly
or replace the poor switch.
No
Check the switches (SW2150-SW2156) and their
periphery, and service it if defective.
8-1
A13P1TR
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