Oki Data CONFIDENTIAL
45850101TH Rev.1
2-42
2. TROUBLESHOOTING PROCEDURES
2.5.5.(2) Abnormal MFP operation after powered on
(2-1)
Any operation does not start at all.
Check item
Check work
Actions to be taken
at NG
(2-1-1)
Check the peripherals of the power supplies
AC power that is
supplied to the printer
Check the supplied voltage of the AC power
source.
Supply the AC
power.
5V power and 24V
power that are
supplied to the CU/
PU board
Check the power supply voltages at the POWER
connector of the CU/PU board.
1,3,4pin: 5V
9,10,11,12,25pin: 24V
22pin: 3.3VS
5,6,7,8pin: 0VL
13,14,15,16,23,26pin: 0VP
Replace the low
voltage power
supply unit.
(2-1-2)
Power switch LED check
Power switch LED
Check if the LED light stays off.
Replace one of
the following:
low voltage power
supply unit,
CU/PU board,
Scanner board,
Panel board,
the cable between
the low voltage
power supply
unit and CU/PU
board,
the cable between
CU/PU board and
Scanner board,
the cable between
Scanner board
and Panel board.
When blinking:
Replace one of
the following: low
voltage power
supply unit, CU/
PU board or the
cable between
the low voltage
power supply unit
and the CU/PU
board board.
(1-2) Display of OKI logo
Check item
Check work
Actions to be taken
at NG
(1-2-1) Operation panel display does not change.
Operation panel display
OKI logo stays on.
Replace the Panel
board (TP1).
(1-3) Error message display
Check item
Check work
Actions to be taken
at NG
(1-3-1) Error message
Error message display
Check the detail of the error on
the error message list.
Follow the instructions.
