Gray Background Or Toner Fog On Prints - Konica Minolta bizhub 4020 Service Manual

4.2.2

Gray background or toner fog on prints

Actions
Step 1
Check the cartridge plunger.
Is the cartridge plunger properly attached to the front door and
is the spring functioning properly?
Step 2
Remove any contamination from the CTLS contacts. Perform
a print test.
Does the problem remain?
Step 3
Check the CTLS for damage.
Is it free of damage?
Step 4
Check the transfer roll for surface contamination or excessive
wear.
Is it free of contamination and wear?
Step 5
Check the transfer roll left contact spring for damage.
Is it free of damage?
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Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Replace the power
supply. See Power
supply removal.
No
Replace the cartridge
plunger. See Cartridge
plunger removal.
The problem is solved.
Replace the printer.
Replace the transfer
roll. See Transfer roll
removal.
Replace the printer.