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

An ITM may cause banding or lines on the

 

Transfer Unit

printed page. Try a new ITM.

 

(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

Check the high voltage contacts in grid block 1

 

Contacts

and 2 to ensure they are clean, not bent,

 

Grid Block 1

deformed or pitted. If incorrect, replace the

 

Grid Block 2

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.

 

 

 

Diagnostic Information 2-83

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Lexmark 5016-001 manual Black, Color Lines or Bands Service Check