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Oki Data CONFIDENTIAL
(1-2)
Error message related to the control panel
Check item
(1-2-1)
Error message
Error message
Check the error contents by referring to the
Error Message List.
(1-3)
"RAM checking" or "Initializing" remains displayed.
Check item
(1-3-1)
Control panel displays freezes.
Control panel
The control panel keeps displaying "RAM
display
checking" or "Initializing."
45487001TH Rev.1
Actions to be taken
Check work
at NG
Follow the
instruction.
Actions to be
Check work
taken at NG
Replace the PU/
CU board.
If the problem
remains
unsolved after
an optional RAM
or SD memory
card is removed,
replace the PU/
CU board.
6.5.2.(2)
Abnormal operations of the printer after the power is turned on
(2-1)
Any operation does not start at all.
Check item
(2-1-1)
Check the peripherals of the power supplies
AC power that is
Check the supplied voltage of the AC power
supplied to the printer
source.
5V power and 24V
Check the power supply voltages at the
power that are
POWER connector
supplied to the PU/
pin-11, -13, -14, -15, -16: 24V
CU board
pin-1, -2, -3, -4: 5V
pin-5, -6, -7, -8, -9: 0VL
pin-17, -18, -19, -20, -21: 0VP
pin-10: 5Vs
(2-1-2)
Power switch LED check
Power switch LED
Check if the LED light stays off.
6. Troubleshooting procedure
Actions to be taken
Check work
at NG
Supply the AC
power.
Replace the low
of the PU/CU board.
voltage power
supply unit.
Replace one of
the following: low
voltage power
supply unit, PU/
CU board, power
SW board, the
cable between
the low voltage
power supply
unit and the PU/
CU board, the
cable between
PU/CU board or
the power SW
board.
When blinking:
Replace one of
the following: low
voltage power
supply unit, PU/
CU board, power
SW board, or the
cable between
the low voltage
power supply
unit and the PU/
CU board board.
6-32 /
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