Question about HP LaserJet 6p Printer

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Black lines on printing

I had black thin lines (horizontally) on each page. Was told to shake cartridge. Did so, now I have multiple black horizontal lines on my printing. Help?

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Usually this is a sign of a bad PCR (primary charge roller) in the cartridge. Replacing the cartridge will fix the problem. Another possible but unlikely cause is toner melted onto the fuser roller. I've also seen damage to the OPC (organo-photo conductor drum) caused by volatile plasticizers in the pcr coming in contact with the drum and damaging it. The OPC drum and the PCR are part of the cartridge, and it's easy enough to replace that.

Posted on May 12, 2009

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Replace the toner cartridge.

Posted on Mar 04, 2009

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1 Answer

It's al black horizontal lines/smudges over the printed page. How to cean this?


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Tip

When u print if u r getting the Horizontal or vertical line then follow these...


If the print is a dismal gray rather than a sharp black, you are probably almost out of toner. This can manifest itself evenly across the entire page or in splotches or stripes, depending on the printer.
Sometimes you can wring a little bit more out of a toner cartridge by taking it out and gently shaking it from side to side (never up and down, as toner can spill out). You can also try turning up the printer’s contrast adjustment, if it has such a knob (usually on the back side if it exists). Faded print can also result from a dirty corona wire, because a dirty wire inhibits a full electrical charge from being passed.
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A horizontal black line on the printout is probably the result of a dirty or damaged roller. There are lots of rollers in the printer, and you can use the space between the lines on the page to determine which roller is causing the problem. Measure the distance between the errant black lines on the page and then use Table A to determine which part might be causing the problem. Table A
Distance between lines
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Toner cartridge photo drum
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Vertical black line on edge of page
This can indicate an almost empty or faulty toner cartridge or (less frequently) some spilled toner inside the printer.


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