Konica Minolta bizhub 4020 Service Manual page 129

Cartridge gearbox service check
Action
Step 1
Is the button aligned with the front of the toner cartridge?
Step 2
Check the gear on the toner cartridge for wear or damage.
Is it free of wear or damage?
Step 3
Remove, and then reinstall the toner cartridge. Make sure that
it is properly seated..
Is it button in the correct position?
Step 4
Run a print test.
Does the problem remain?
Step 5
Replace the toner cartridge
Does the problem remain?
Step 6
Check the gears on the cartridge gearbox for proper rotation
and for wear or damage.
Does it rotate properly and is it free of wear or damage?
bizhub 4020/3320 Service Manual
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Yes No
Go to step 2. Go to step 3.
Go to step 5. The problem is solved.
Go to step 4. Go to step 5..
Go to step 5. The problem is solved.
Go to step 6. The problem is solved.
Go to step 7. Replace the cartridge
gearbox. See
gearbox
Cartridge
removal.