Field Service Ver. 2.0 Mar. 2006
23. Malfunction code
329
bizhub C250P
T
roubleshooting
23.5.17
C2557: Abnormally low toner density detected Black TCR Sensor
23.5.18
C2558: Abnormally high toner density detected Black TCR Sensor
23.5.19
C2559: Cyan TCR Sensor adjustment failure
23.5.20
C255A: Magenta TCR Sensor adjustment failure
23.5.21
C255B: Yellow TCR Sensor adjustment failure
Relevant Electrical Parts
Imaging Unit /K
Toner Supply Motor C/K (M7)
Mechanical Control Board (PWB-M)
MFP Control Board (PWB-MFP)
Step
Action
1
Perform image troubleshooting procedure if image density is low.
2
Clean the TCR Sensor window on the underside of the Imaging Unit if dirty
3
M7 operation check
4
Reinstall Imaging Unit
5
Change Imaging Unit /K
6
Change PWB-M
7
Change PWB-MFP.
Relevant Electrical Parts
Imaging Unit /K
Mechanical Control Board (PWB-M)
MFP Control Board (PWB-MFP)
Step
Action
1
Correct the TCR connection on the underside of the Imaging Unit if faulty.
2
Reinstall Imaging Unit
3
Change Imaging Unit /K
4
Change PWB-M
5
Change PWB-MFP
Relevant Electrical Parts
Imaging Unit /C
Imaging Unit /M
Imaging Unit /Y
Toner Supply Motor Y/M (M6)
Toner Supply Motor C/K (M7)
Mechanical Control Board (PWB-M)
MFP Control Board (PWB-MFP)
Step
Action
1
Clean the TCR Sensor window on the underside of the Imaging Unit if dirty
2
M6, M7 operation check
3
Reinstall Imaging Unit
4
Change Imaging Unit
5
Change PWB-M
6
Change PWB-MFP
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