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2-80 Service Manual
5016-001
All Black or Color Page Service Check
Note: An all black or a page that is all one color is generally caused
by a problem in the high voltage system, or incorrect high voltage in
the printing process resulting in the development of toner on the
entire PC drum.
FRU Action
1 Print Cartridge Try a new print cartridge corresponding to the
color on the page.
2 High Voltage
Contacts
Grid Block 1
Grid Block 2
HVPS
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.
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 check to be sure the high voltage
contacts align with the contacts on the HVPS. Also
look for signs of pitting or damage.
3 HVPS to Engine
Board Cable
Check the cable for correct installation and
continuity. If incorrect, replace the cable.
4 Engine Board
Printhead Cable
Engine Board
Check the cable for proper installation and
continuity.
• If the continuity is incorrect, replace the cable.
• If incorrect, replace the engine board.
5 Printhead The printhead can cause this problem, but should
only be replaced after a new toner cartridge(s) or
ITM has been replaced.