Oki C301 Maintenance Manual page 148

Oki Data CONFIDENTIAL
Display Causes
POWER OFF/ON Belt
901:ERROR temperature
error
904:ERROR 901: Short
circuit
902: Open
circuit
903: High
temperature
904: Low
temperature
POWER OFF/ON A lock error
923:ERROR with black
image drum
POWER OFF/ON Fuser motor
928:ERROR lock error
POWER OFF/ON A clock error
933:ERROR correction
error with an
option unit
(which does
not occur with
the printer in
the factory
shipped
configuration)
44951501TH Rev.2
Error detail
Is the cable from the belt No Connect the cable
thermistor to the CU/PU properly.
board connected properly?
Does the error occur again? Yes Turn off and on
the printer.
No Replace the belt
thermistor.
The image drum does not Be sure the image
revolve properly. drum is properly
installed properly.
Does the error display is Yes Replace the
provided again by turning off image drum unit.
and on the printer? Yes Replace the
image drum
motor.
The fuser does not operate Check that the
properly? fuser is properly
installed.
Yes Replace the fuser.
Does the error occur again? Yes Replace the fuser
motor.
Does the error occur again? Yes Be sure of
connector
contacts.
Does the error occur again? Yes Replace the
option unit.
Display
Actions
POWER OFF/ON
933:ERROR
SERVICE CALL
980:ERROR
SERVICE CALL
983:ERROR
SERVICE CALL
990:ERROR
xxxxxxxxxxxxxxxx
CRC CHECK NG ( )
WDT ERROR
ADR=××××××××
COMMUNICATION
ERROR
Note! With the printer's temperature not more than 0ºC, Service call errors 188
Error, 171 Error, 175 Error, 903 Error and 904 Error may occur. After turn off
the printer, turn on the printer after the printer warms.
Causes Error detail
Tray-2
CPU clock
frequency
error
Media Media is jammed by
jamming error entangling around the fuser.
around fuser
Duplicate Multiple toner cartridges for
toner cartridge the same color ware detected.
detection error
Waste toner Is the K toner cartridge
sensor installed?
detection Does the error occur again?
error
PU download A CRC check error was
data CRC detected after downloading
check error of PU data (PU firmware and
custom media data).
PU firmware
runaway
Does the error occur again?
PU-CU Does the error occur again?
interface error
7. TROUBLESHOOTING
Actions
Turn off the
printer.
Replace the fuser.
Install toner
cartridges for
specified colors
at the proper
positions.
No Install the K toner
cartridge.
Yes Be sure of cable
connection,
and then
perform board
replacement.
Turn off and on
the printer, and
then re-download
it (In general use
of the printer, the
downloading is
not performed
and this error
does not occur).
Turn off and on
the printer.
Yes Replace the CU/
PU board.
Yes Replace the CU/
PU board.
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