Error Message Related To The Control Panel; Ram Checking" Or "Initializing" Remains Displayed; Abnormal Operations Of The Printer After The Power Is Turned On; Any Operation Does Not Start At All - Oki C911 Maintenance Manual

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 Check" or "Initializing."
45530603TH Rev.2
Actions to be taken
Check work
at NG
Follow the
instruction.
Actions to be
Check work
taken at NG
Replace the PU/
CU PCB.
If the problem
remains
unsolved after
replacement
of DIMM or
removal of HDD,
replace the PU/
CU PCB.
4.5.2.(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 of the PU/CU PCB.
supplied to the PU/ 24V: pin-13, -14, and -16
CU PCB 5V: pin-8, -10 and -21
5VS: pin-19
0V: pin-9, -11, -12, -15, -18, -20, and -22
(2-1-2) Power switch LED check
Power switch LED Check if the LED light stays off.
4. TROUBLESHOOTING PROCEDURE
Actions to be taken
Check work
at NG
Supply the AC
power.
Replace the low
voltage power
supply unit.
Replace one
of the following
in turn: low
voltage power
supply unit,
PU/CU PCB,
control panel
PCB, power SW
board, and the
cable between
respective PCBs
When blinking,
replace one of
the following in
turn: low voltage
power supply
unit, PU/CU
PCB, and the
cable between
the low voltage
power supply
unit and the PU/
CU PCB.
4-38