Question about HP LaserJet 4 plus Printer

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I have three horizontal lines across the printed document

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Hello,

Here is the print defect information from the service manual.

1. Toner Cartridge.
The circumference of the photoconductive drum is 3.75 inches (94mm). The circumference of the developer roller is 2 inches (51mm). If a defect appears in the print image at these intervals, assume the defect is associated with the Toner Cartridge. Replace the Toner Cartridge.
2. Fuser Assembly.
The Fuser Roller’s circumference is approximately 2.5 inches (63mm) for the LJ4, and 3-1/8 (79mm) for the LJ4+/5. If a defect
appears at this interval, assume the defect is associated with the Fuser Assembly. Clean the Fuser Assembly rollers. Replace the assembly if necessary.
3. Dirty Roller.
Any dirty roller along the paper path may result in a pattern of
repetitive print image defects. Examine and clean rollers along the
paper path.

We have the full service manual download available for $6.95 if you need it. We also carry all repair parts for your printer.

I hope this helps, if so please rate my solution.

Buddy
Corporate Computer
www.ccl-la.com
Over 21 years of PC and printer support/repair

Posted on Jun 30, 2009

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