unknownasked Jul 2, 2000 at 9:56am
HP LJ IIP+ Black Pages
After reading a bunch of posts here and on a few web sites, I tried swapping out several components on my printer with those in the IIIP, including the laser assembly, the scanner motor assembly, and the density adjusting assembly. I've also inspected the optical fiber cable, which looks and feels okay (and it does transmit light), as well as testing some of the electrical connections in the wiring harnesses for resistance.
After all of this, pages still come out completely black. I managed to eliminate the 51 error (probably from the scanner motor), but I can't figure out what to do next. Am I missing something obvious? I don't have a lot of experince fixing laser printers, but I am pretty good with electronics, so I'd really appreciate some guidance here....
on to the page. That leaves the photoconductive drum which as we all know starts out with a charge and the laser erases the charge. Wherever there is a charge, the toner is repelled. No charge, it sticks, thus forming the image. This all proves that the high voltage unit is doing it's job and we can blame contacts to the drum as the guilty culprit. To solve the problem, you'll see a white plastic axle on the left side of the cartridge held in by 2 screws. Remove the axle and tap the shaft out so it protrudes about .050".
We use a hammer and a .050" thick washer in our shop. An alternative would be to bend out the contact in the printer so it makes firmer contact with the axle.
it is allready a long ago (2000) but I try to contact you. I also have a problem with my LBP-4 Lite Canon Printer. After warming up it gives an error: 50 Service.
In the documentation I find nothing about this 50.
Can you give me information please.
Kind Regards from the Netherlands,
Jan Van Dongen