HP LaserJet 4050N

[Alasdair Campbell]

LaserJet 4050N with blank line lengthways down middle of each print, about
5mm wide. Only appeared after being unused for 3 months.

Service manual says I need to start replacing huge parts of the printer, but
I was hoping for other ideas.
I've dismantled it as far as I can and can't see any alien objects, or signs
of wear.

Haven't started looking at main printing stage, as I wouldn't know where to
start. Are there manuals that doc dismantling this sort of thing?

 

[Jim Land]

LaserJet 4050N with blank line lengthways down middle of each print,
about 5mm wide. Only appeared after being unused for 3 months.

Service manual says I need to start replacing huge parts of the
printer, but I was hoping for other ideas.
I've dismantled it as far as I can and can't see any alien objects, or
signs of wear.

Haven't started looking at main printing stage, as I wouldn't know
where to start. Are there manuals that doc dismantling this sort of
thing?

Take a look at:

http://www.feedroller.com/Store/hp2.php

and the support forum at

http://www.fixyourownprinter.com/

 

[Jeff Liebermann]

LaserJet 4050N with blank line lengthways down middle of each print, about
5mm wide. Only appeared after being unused for 3 months.

Look for a small piece of paper stuck in the slot behind which the
laser scanner hides or in the corresponding toner cartridge window.

 

[Meat Plow]

Look for a small piece of paper stuck in the slot behind which the
laser scanner hides or in the corresponding toner cartridge window.

I've repaired many HP lasers that were located inside industrial
complexes. These required cleaning because of the environment they were
in. Remove the laser box, open it up and clean the mirror.