44473001TH Rev.1
210 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
Display
Cause
Error details
Measure
Inspection is
required.
251 : Error
SD card
erasure error
Inspection is
required.
252 : Error
～
255 : Error
SD card
security error
Inspection is
required.
256 : Error
257 : Error
SD card error
Power OFF/ON
Error : 802
Error : 803
Error : 805
Error : 807
Error : 808
SU Exception
Power OFF/ON
Error : 811
Error : 812
Error : 813
SU Com-
munication
Error
Power OFF/ON
Error : 890
SU System
Memory
Overflow
Power OFF/ON
901 : Error
～
904 : Error
Belt
temperature
error
901:
Short circuit
902:
Open circuit
903:
High temperature
904:
Low temperature
Is the cable from the belt
thermistor to the CU/PU
board connected properly?
Does the error occur again?
No
Yes
No
Connect the cable
properly.
Turn off and on the
MFP.
Replace the belt
thermistor.
Display
Cause
Error details
Measure
Power OFF/ON
923 : Error
A lock error
with black
image drum
The image drum does not
revolve properly.
Does the error display is
provided again by turning off
and on the MFP?
Yes
Yes
Be sure the image
drum is properly
installed properly.
Replace the image
drum unit.
Replace the image
drum motor.
Power OFF/ON
928 : Error
Fuser motor
lock error
The fuser does not operate
properly?
Does the error occur again?
Yes
Yes
Check that the fuser is
properly installed.
Replace the fuser.
Replace the fuser
motor.
Power OFF/ON
933 : Error
Tray-2
CPU clock
frequency
error
Power OFF/ON
941 : Error
942 : Error
943 : Error
944 : Error
PU Error
A PU error was detected.
Turn off and on the
MFP.
When this error occurs
again, replace the CU/
PU board.
941 : Watch Doc Timer Error
942 : Detection of Unassigned
Interruption
943 : CPU Error Detection
944 : Dcon Access Error
Inspection is
required.
980 : Error
Duplicate
toner cartridge
detection error
Multiple toner cartridges for
the same color ware
detected.
Turn off the MFP.
Replace the fuser.
Inspection is
required.
983 : Error
Duplicate
toner cartridge
detection error
Multiple toner cartridges for
the same color ware
detected.
Install toner cartridges
for specified colors at
the proper positions.
Inspection is
required.
990 : Error
Waste toner
sensor
detection error
Is the K toner cartridge
installed?
Does the error occur again?
No
Yes
Install the K toner
cartridge.
Be sure of cable
connection, and
then perform board
replacement.
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.
Summary of Contents for MC561
Page 1: ...Maintenance Manual 12610B MC361 MC561 CX2731MFP...
Page 79: ...44473001TH Rev 1 79 Oki Data CONFIDENTIAL 3 MFP INSTALLATION Sample MC361 Sample MC351...
Page 93: ...44473001TH Rev 1 93 Oki Data CONFIDENTIAL 4 REPLACEMENT OF PARTS...
Page 109: ...44473001TH Rev 1 109 Oki Data CONFIDENTIAL 4 REPLACEMENT OF PARTS C C A A D B B D...
