Oki B6500 Series, Service Manual

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Chapter 1 Troubleshooting
FIP- 1.P6 Vertical stripes
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.
Print defect
There are vertical black stripes along the paper.
ESS and possible causes
- EP CARTRIDGE
- HVPS/MCU (PL12.1.19)
- GUIDE ASSY CRU R (PL8.1.25)
- BTR ASSY (PL8.1.21)
- 150 FEEDER ASSY (PL5.1.1)
- ROS ASSY (PL8.1.1)
- PWBA ESS (PL12.1.13)
- 550 FEEDER ASSY (PL7.1.10)
Step Check Yes No
1
Check the paper transfer course.
Check if there are any stains or obstacles on the paper
transfer course between the paper feeding entrance
and the exit.
Are there any obstacles on the paper transfer course?
Go to step 2.
Remove the obsta-
cles or stains from
the paper transfer
course.
2
Checking the laser beam course
Make sure there is no obstacle between ROS ASSY
and Drum.
Are there any obstacles on the laser beam course?
Check if any stains on ROS ASSY window.
Go to step 3.
Remove all the
obstacles from the
laser beam course
and/or clean ROS
ASSY window.
3
Checking EP CARTRIDGE
Install a new EP CARTRIDGE.
Carry out a test printing.
Have the vertical black stripes gone?
End of work Go to step 4.
4
Checking BTR ASSY Remove BTR ASSY. (RRP8.10)
Check if any stains and/or wear on BTR ASSY.
Are there any stains and/or wear on BTR?
Go to step 5.
Replace BTR
ASSY. (RRP8.10)
5
Checking ROS ASSY
Are the connectors on ROS ASSY surely connected?
Go to step 6.
Reconnect the con-
nectors.
6
Checking Heat Roll and Pressure Roll Remove FUSER
ASSY. (RRP8.8)
Warning; Start the operation after the FUSER ASSY
have cooled down.
Turn the Gear HR with a finger, and check the Heat Roll
and Pressure Roll.
Are the Heat Roll and Pressure Roll damaged or
stained?
Go to FIP1.42
Electrical Noise.
Replace FUSER
ASSY. (RRP8.8)