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Without the Bizhub model number. You mite try this, take each of the image units out and shake them so that all of the developer and toner are spead out across the entire image unit one of the image units mite have been stored with all of the developer at one end, and when place in the machine the motor for that image unit has a hard time trying to turn..
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That depends on the printers model
One could be;
Check to see if the waste bottle is overfull.
If yes, the waste toner will be backed up into the waste tubes, first affecting the primary transfer cleaner unit, then the black drum cleaning unit, then the color drum cleaning units.
Or;
Developer unit • Check if the developer unit is installed properly. • Check that the developer unit and coupling on the equipment side are properly engaged. • Check that the mixer of the developer unit is rotated. • Check if the developer material is too dark visually. • Check if the amount of the developer material is too large or too small. • Remove any toner or dust on the ATC sensor connector and the drawer connector of the process cover. • Remove any toner or dust on the EPU sensor connector and the drawer connector on the equipment side.
Or;
Auto toner sensor Harness LGC board • Check the connectors and harnesses between the auto toner sensor and LGC board (CN364). • Check if there is any foreign matter such as toner in the connector of the auto toner sensor. Remove if there is and reconnect it.
Hi there, the error code 7401 means that there is a problem with the toner sensor in the black developer unit (see service manual page 1-4-15), replace the black developer unit and the problem will be solved.
Black drum ATDC replace the black developer unit, also check to make sure the black toner is getting into the black developer unit. Open close the front door to reset the code (Not the Toner door)
e000020 is error with toner unit, several possibility : - The toner is empty - The developer failsto be replenished with starter developer properly. - Related developing unit - Ahopper motor error is identified by the detail code of E020. However, it may be identified by E02x according to need.
c380 indicates auto-toner error for black developer (K).
Check following:
Is the harness between the LGC board and the developer unit drawer connector open-circuited? Is any harness inside the developer unit or the auto-toner sensor harness open-circuited? Is the auto-toner sensor connector or the connector CN341 on the LGC board disconnected?
IF connector no problems, then u probably need to replace the auto toner sensor.
e0020 is to do with there not being enough toner in the developer unit.
Firstly it may be a good idea to check/change to toner cartridge.
Switch off and disconnect from mains for the next bit.....
If ok remove the developer roller, cover is above the manual tray on the right hand side then once inside dev unit has connectors at either side, check they are properly seated. If you need to remove the dev there are several black screws around a metal plate all need removing. The roller should be black with toner. May need replacing depending on age and usage of copier.
9-357. Black toner problem.Probably You have low toner sensor defect. But try first to vacuum and clean black toner dispenser.You must vacuum whole path wich is used to transport black toner to developer unit.Then if printing B/W print only, you must print 10 full color sheets every 100 copies.
what model machine?
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