Specifications

Troubleshooting Print Quality Problems - 6
P-5 Horizontal Band Deletions
Step Actions and Questions
Action
(When There Is Problem)
Paper conditions (moisture, warp, etc.)
Is the problem solved if you use new sheets of paper?
Replace the paper. Advise
the customer to stock
paper in a dry place.
Toner cartridge
Is the problem solved by replacing the toner cartridge with a new
one?
Replace the toner
cartridge.
Charging and development
Is the toner image on the drum normally developed?
* Switch off the printer power while the development is in
progress, and visually check the toner image on the drum (the area
upstream of the transfer step).
Replace power supply
assembly. If problem
persists, replace DC
controller board.
Main drive assembly and drive transfer assembly
Does each gear of the drive assemblies rotate normally?
* Remove the fuser assembly and the toner cartridge. Rotate the
gear above at the rear of the drive assembly by hand in the rear-
ward direction. Visually check the rotation of the gears.
Replace the drive
assembly.
Registration roller assembly
Does the registration roller assembly rotate normally?
* Open the cover and remove the toner cartridge. Rotate the
registration roller by hand.
Replace the registration
roller assembly.
Fuser assembly
Do the fuser heater roller and gears of the fuser assembly rotate
normally?
* Remove the fuser assembly. Rotate the fuser heater roller gear
by hand and check their rotation by eye.
Replace the fuser
assembly.
Transfer roller assembly
Are there foreign objects or contamination on the roller portion of
the transfer roller assembly?
Replace the transfer
roller assembly.
Problem
There are areas of the image that are extremely light or missing entirely. These
missing areas form wide bands that run horizontally across the page and parallel
with the direction of paper travel.
Initial Analysis
Inspect the following components. Are they compatible with your printer ver-
sion, correctly installed, not damaged, deformed or contaminated, or free of
foreign objects sticking?
• Toner Cartridge • Power Supply Assy • Transfer Roller Assy
• Mirror Assembly • Laser/Scanner Assy • DC Controller Board
• Fuser Assembly • Fuser Pressure Roller • Static Eliminator
• Top Cover