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Ask Engineer John C. Your Own Question
Engineer John C.
Engineer John C., Computer Science Engineer
Category: Printers
Satisfied Customers: 4895
Experience:  CompTIA A+ Certified and 10 years of experience repairing computers and printers.
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I have Konica Minolta Bizhub c220. It shows worning p-9

Customer Question

Hi, I have Konica Minolta Bizhub c220. It shows worning p-9 and p-21. I does not print black. I have replaced imaging unit and black drum but nothing changed. I would appreciate any advice. Thanks, Sergio.
Submitted: 2 years ago.
Category: Printers
Expert:  A. Stevens replied 2 years ago.
Hi, I am A. Stevens here to help with your question!
Expert:  A. Stevens replied 2 years ago.
When you try to print black, does it just print a blank page?
Expert:  A. Stevens replied 2 years ago.
Error P-21 is referring to a transfer belt failture
Customer: replied 2 years ago.

Yes, it prints blank blan page when printing just black. I have replaced transfer belt, black drum, and black imaging unit (developing). Same problem.

Expert:  A. Stevens replied 2 years ago.
Next might try the print head?
Customer: replied 2 years ago.

I read service manual. PH unit, PCRB and so on. But, to expansive to change everything. New machine is the best solution, I agree.

Expert:  A. Stevens replied 2 years ago.
Yes, most likely so if you have replaced all of these parts and it's still not functioning correctly. Did you want me to give you any recommendations for a replacement?
Customer: replied 2 years ago.

Sure.

Expert:  A. Stevens replied 2 years ago.
What kind of volume are you doing monthly?
Expert:  A. Stevens replied 2 years ago.
Or if you still have extra toner for your current machine best option may be to purchase something in the same line...so you can use any remaining ink you have