Toner Specks Appear On Prints - Konica Minolta bizhub 4020 Service Manual

4.2.10 Toner specks appear on prints

Actions
Step 1
Check the imaging unit for wear or damage.
Is it free of wear or damage?
Step 2
Make sure the paper path is free of debris or toner
contamination.
Does the problem remain?
Step 3
Check the transfer roll for contamination or excessive wear.
Is it free of contamination or wear?
Step 4
Remove the fuser and check for damage or debris on the
rollers and belts.
Is it free of damage and debris?
Step 5
Reseat the cables JLSU1 and J6 on the controller board.
Does the problem remain?
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Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Replace the printhead
unit.
No
Replace the imaging
unit.
The problem is
solved.
Replace the transfer
roll.
Replace the fuser.
The problem is
solved.