Service manual

2-69
Confidential
■ Error code EE
Unavailability of communication after connecting to the wireless LAN PCB is detected.
(Wireless LAN model only)
■ Error code EF
The supplied power is unstable.
Print Unable EE
Turn the power off and then back on again.
Step Cause Remedy
1
Harness connection failure of
wireless LAN PCB
Check the harness connection of the
wireless LAN PCB and reconnect it.
2 Wireless LAN PCB failure Replace the wireless LAN PCB ASSY.
3
High voltage power supply PCB
failure
Replace the high voltage power supply
PCB ASSY.
4 Main PCB failure Replace the main PCB ASSY.
Print Unable EF
Turn the power off and then back on again.
Step Cause Remedy
1
The irregular power supply is
detected
Replace the low voltage power supply PCB
ASSY. Reset the irregular power supply
detection counter following the procedure
described in
"5. IF YOU REPLACE THE
PANEL UNIT" in Chapter 4
.
2 Main PCB failure Replace the main PCB ASSY.
Note:
• The irregular power supply detection error (Machine Error EF) occurs when there is a
large fluctuation 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.