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HP LaserJet Quick Reference Service Manual: Black Pages

Volume i.
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Also See for LaserJet
User manual - 449 pages
Manual - 432 pages
Software manual - 418 pages


Black Pages

All Printers
The toner cartridge is improperly installed or is defective.
The HV contacts are dirty or the HV PCA is defective
– Clean the HV contacts or replace the HV PCA.
LJ 4L and 4P: The HVPS, AC power module, and DC controller
are all on the same board.
The DC controller is defective.
The laser/scanner cable or assembly is defective.
5L, 5P, 6P, 6L
Light is leaking into the printer
The fiber optics cable is defective.
4L, 4P, 4V
Light is leaking into the printer.
278 – Image defects


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