Konica minolta bizhub c452 depletes developer (magenta & cyan)

[AhmedChamumi]

Hi everyone,

I have yet another bizhub c452 which habitually depletes magenta and cyan developers every 300 to 400 printouts....here is what i have replaced so far;
1. Genuine imaging units
2. Toner hopper unit.
3. HVTs
4. Printer control board.
After replacing the above indicated the cyan has shown some improvement but magenta still misbehave.....what do i over look?

Please assist.

Best regards,

Ahmed.

[Mr Spock]

I think there was a bulletin about the transfer unit grounds and connection on the back causing issues.
Also check the Drum/dev unit contacts in the back of unit.

[Max]

Replace belt,k dev and k drum. I found that fixes the problem.

[REGSIS]

Besides HV board, this can be caused by any consumables which is overlife.

For example overlife black drum can cause this problem on magenta IU.
Do you have any warnigs after image stabilization on bottom of the screen like P-5 ?

What are the values for Vg and Vb for each unit?