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Chapter 1 Troubleshooting
FIP-1.P11 Background (Fog)
Trouble substance
There is toner stain all over or a part of the page. The stain appears as very
bright gray stain.
ESS and possible causative parts
- EP CARTRIDGE
- BTR ASSY (PL8.1.21)
- HVPS/MCU (PL12.1.19)
- GUIDE ASSY CRU R (PL8.1.25)
- ROS ASSY (PL8.1.1)
- PWBA ESS (PL12.1.13)
- 150 FEEDER ASSY (PL5.1.1)
- FUSER ASSY (PL8.1.20)
- 250 FEEDEER ASSY (PL6.1.11)
- 550 FEEDER ASSY (PL7.1.10)
Before commencing troubleshooting, check the paper transfer course. Make sure there is no foreign
articles on the transfer course, such as staples, paper clips, scraps of paper and so on.
Step
Check Yes No
1
Checking EP CARTRIDGE
Install a new EP CARTRIDGE.
Carry out a test printing.
Have the background gone?
End of work Go to step 2.
2
Checking the image development process
Operate Test Print, and turn off the power of the printer
while printing.
Remove the EP CARTRIDGE with care, and check the
toner image formed on the drum, right before the
transcribe part (BTR).
Is the image on the drum completely formed? Is the area
clear and black, and easily read?
Go to step 3.
Go to FIP2.18
HVPS/MCU
3
Checking ROS ASSY
Are the connectors on ROS ASSY surely connected?
Go to step 4.
Reconnect the
connectors.
4
Checking 150 FEEDER ASSY ground
Remove EP CARTRIDGE.
Check the continuity from the front open part between 150
FEEDER ASSY metal part and printer frame metal part.
Is 150 FEEDER ASSY grounded?
Go to step 5.
Remove 150
FEEDER ASSY
and install again
for correct
ground.
(RRP5.1)
5
Checking FUSER ASSY ground
Open COVER REAR (PL1.4).
Check the continuity between printer frame and the screw
on the back of FUSER ASSY.
Is FUSER ASSY grounded?
Go to step [ESS
and possible
causative parts].
Remove FUSER
ASSY and install
again. (RRP8.8)
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