Oki MC561 Maintenance Manual page 210

Oki Data CONFIDENTIAL
Display Cause
Inspection is SD card
required. erasure error
251 : Error
Inspection is SD card
required. security error
252 : Error
～
255 : Error
Inspection is SD card error
required.
256 : Error
257 : Error
Power OFF/ON SU Exception
Error : 802
Error : 803
Error : 805
Error : 807
Error : 808
Power OFF/ON SU Com-
Error : 811 munication
Error : 812 Error
Error : 813
Power OFF/ON SU System
Error : 890 Memory
Overflow
Power OFF/ON Belt Is the cable from the belt
901 : Error temperature thermistor to the CU/PU
～
error board connected properly?
904 : Error 901: Does the error occur again?
Short circuit
902:
Open circuit
903:
High temperature
904:
Low temperature
44473001TH Rev.1
Error details Measure
No Connect the cable
properly.
Yes Turn off and on the
MFP.
No Replace the belt
thermistor.
Display Cause
Power OFF/ON A lock error The image drum does not
923 : Error with black revolve properly.
image drum
Does the error display is
provided again by turning off
and on the MFP?
Power OFF/ON Fuser motor The fuser does not operate
928 : Error lock error properly?
Does the error occur again?
Power OFF/ON Tray-2
933 : Error CPU clock
frequency
error
Power OFF/ON PU Error A PU error was detected.
941 : Error
941 : Watch Doc Timer Error
942 : Error
942 : Detection of Unassigned
943 : Error
Interruption
944 : Error
943 : CPU Error Detection
944 : Dcon Access Error
Inspection is Duplicate Multiple toner cartridges for
required. toner cartridge the same color ware
980 : Error detection error detected.
Inspection is Duplicate Multiple toner cartridges for
required. toner cartridge the same color ware
983 : Error detection error detected.
Inspection is Waste toner Is the K toner cartridge
required. sensor installed?
990 : Error detection error Does the error occur again?
Note! With the MFP's temperature not more than 0ºC, Service call errors 168
Error, 171 Error, 175 Error, 903 Error and 904 Error may occur. After turn off
the MFP , turn on the MFP after the MFP warms.
7. TROUBLESHOOTING PROCEDURES
Error details Measure
Be sure the image
drum is properly
installed properly.
Yes Replace the image
drum unit.
Yes Replace the image
drum motor.
Check that the fuser is
properly installed.
Yes Replace the fuser.
Yes Replace the fuser
motor.
Turn off and on the
MFP.
When this error occurs
again, replace the CU/
PU board.
Turn off the MFP.
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.
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