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2-82 Service Manual
5016-001
Background Service Check
Note: Some background problems can be caused by rough papers.
Slick or coated papers may also cause background. Some problems
occur with printers that run a large amount of graphics in a humid
environment.
• Try an ITM assembly.
• Try a new toner cartridge of the background color.
FRU Action
1 Erase Lamps Go to the “Erase Lamp Service Check” on
page 2-50.
2 Printhead The printhead cannot be cleaned. If all other
attempts at correcting a background problem
fail, replace the printhead.
3 High Voltage
Contacts
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
4 Grid Block ASM 2
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 any signs of pitting or damage.
5 Engine Board If background problems continue:
• Replace the HVPS.
• If this does not fix the problem, replace grid
assembly 1, and assembly 1.