E 360 dn gray background

[Rick]

This unit prints a light shade gray where it should be white . I changed the toner and drum and the same also tried to adjust all the print settings ie density
darkness but nothing makes any difference . Almost seem like a developer bias is out of whack . Any ideas any one ?

[Silvertoast]

this is the manual suggestion for heavy background


Check the toner darkness setting in the driver. Try a lower setting.
Make sure the toner cartridge and PC Kit are correctly installed and the high voltage
contacts are clean.
If the toner cartridge and PC Kit are installed correctly, then try a new PC Kit first and then
toner cartridge.


Check the contacts for correct installation and contamination where contact is made
between the print cartridge assembly and spring contacts which connect to the LVPS/HVPS
board at CN203. Clean as necessary.
If this does not correct the problem, then replace the following FRUs one at a time in the
order shown:
• LVPS/HVPS board (See “Black page” on page 2-31 for pin values.)
• Controller board