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Diagnostic Information 2-83
5016-001
Black, Color Lines or Bands Service Check
Banding is difficult to detect except on a page with a uniform gray, color
or a large amount of graphics printed on the page. Banding is primarily
due to a variation in the speed of the paper as it feeds through the
printer, especially in the development and transfer process.
FRU Action
1 Toner Cartridge Try a new toner cartridge, as the present
cartridge may be defective, replace the cartridge
corresponding to the color of the line or band.
2 Intermediate
Transfer Unit
(ITM)
An ITM may cause banding or lines on the
printed page. Try a new ITM.
3 Transfer Roller Note: The transfer roll is spring loaded against
the inner cover so that it properly contacts the
transfer belt in the ITM unit.
Check the transfer roll for correct installation. Be
sure the transfer roll rotates freely. Check the
left and right side transfer roll springs and
bushings for signs of binding or damage.
Replace parts as necessary.
4 High Voltage
Contacts
Grid Block 1
Grid Block 2
Check the high voltage contacts in grid block 1
and 2 to ensure they are clean, not bent,
deformed or pitted. If incorrect, replace the
failing grid block assembly.
5 HVPS Be sure the HVPS is correctly installed and
securely mounted to the HVPS mounting
bracket and Grid Block assemblies. If correct,
remove the HVPS and be sure the high voltage
contacts align with the contacts on the HVPS.
Also look for signs of pitting or damage.
6 Printhead The printhead can cause this problem, but
should only be replaced after a new toner
cartridge(s) or ITM has been replaced.