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3.13.4 Low voltage power supply PCB ASSY failure
3.13.5 NCU ASSY failure
User Check
• Turn the power off and on.
Step Cause Remedy
1
Harness connection failure of low
voltage power supply PCB ASSY
Check the harness connection of the low
voltage power supply PCB ASSY, and
reconnect it.
2
Low voltage power supply PCB
failure
Replace the low voltage power supply
PCB ASSY. However, in the failure case
of that the irregular power supply is
detected, reset the irregular power supply
detection counter following the procedure
described in
"3.1 Reset of Irregular Power
Supply Detection Counter" in Chapter 4
.
3 Main PCB failure Replace the main PCB ASSY.
CAUTION :
• The irregular power supply detection error EF occurs when there is a large distortion in
the power supply voltage supplied to the machine.
In this case, if the same power supply is used, the same error might occur again even
if the low voltage power supply PCB ASSY is replaced.
User Check
• Verify that the telephone cord is securely inserted into the socket.
Step Cause Remedy
1
Harness connection failure of NCU
ASSY
Check the harness connection of the
NCU ASSY, and reconnect it.
2 NCU ASSY failure Replace the NCU ASSY.