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Confidential
 Error code 4000
The number of rotations of the drum unit is reaching the upper limit.
Error code 4200
The number of rotations of the drum unit has reached the upper limit. (Printing does not 
stop.)
 Error code 4B01
Dot count or develop roller counter of the toner is reaching the upper limit.
Drum End Soon
-
Replace Drum
-
<User Check>
• Prepare a new drum unit.
Step Cause Remedy
1
Replace the drum unit with a 
new one and reset the drum 
counter. If the error display is not 
cleared, the main PCB is faulty.
Replace the main PCB ASSY.
Toner Low
-
<User Check>
• Prepare a new toner cartridge.
Step Cause Remedy
1
Main PCB failure Replace the main PCB ASSY.