238 Troubleshooting EN
Light print,
dark print, or
fade
Wrong toner density setting. From the print-quality menu on
the control panel, adjust the toner
density setting. Make sure
EconoMode is off.
Toner cartridge is low. Replace the toner cartridge.
Transfer roller is defective. Replace the transfer roller.
Print media does not meet printer
specifications or is stored
improperly.
1. Print a few more pages to see
if the problem corrects itself.
2. Turn over the stack of media in
the tray. Also try rotating the
media 180°.
3. If the print media does not
meet HP specifications, replace
the paper, and advise the
customer to use the
recommended print media and
store it properly.
Poor contact to the engine
controller board.
1. Ensure that the drum ground
spring is connected to the engine
controller board correctly.
2. Clean the contacts if they are
contaminated. If the problem
remains after cleaning, or parts
are damaged or deformed,
replace them.
3. Replace the engine controller
board, if necessary.
Defective laser/scanner. Replace the laser/scanner.
Defective engine controller board. Replace the engine controller
board.
See also “Faded Print/Bubbles”
on page 236.
Table 42. Image defects
Problem Cause Solution
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