asked Mar 16, 2006 at 8:55pm
Hp HP LaserJet 4100TN

4100TN toner caking problem

I'm a new printer technician and I have a call that I can't seem to figure out.

I've installed a maintenance kit on a 4100TN. Within 2000 prints, the printer is leaving white 'ghost' lines on the paper where toner should be. The white lines are replicating in a pattern down the page.

I inspected the toner and on the drum there are lines of caked on toner that correspond to the white lines on the paper output.

The people are not using HP toner, I believe they are using xerox compatible cartridges. They've tried replacing the toner but the lines keep returning.

I'm beginning to think I got a bad transfer roller in the kit as all the toner is not coming off the drum.

Am I on the right track? All help is appreciated.

PS. About 7-8 years ago this website helped me fix my own laser printer (HP4L) and I've been a big fan ever since.
Transfer rollers just don't go bad in selective areas. If the roller is bad, it will be light all the way across. In any case, the wiper blade should remove any residue toner that's left on the drum in a good toner cartridge. It's a toner cartridge issue all the way. I was never a big fan of the Xerox compatibles.
by moe on Mar 16, 2006 at 11:06pm Add comment
Try and OEM HP toner and if the issue returns the problem is the dc controller, especially if there is only 1 line with the caked on toner and it will not come off.
by dmzcompute on Mar 17, 2006 at 5:33am Add comment
please change that transfer roller when you change the cart as the cart can cause damage to the roller and then any new cart can be damaged and so on. it has happend to me using oem's.
by imagertech on Mar 17, 2006 at 5:08pm Add comment

I examined the transfer roller and it too had caked on toner, although it wasn't apparent until I took it out and looked at it closely.

I had to scratch the lines with my fingernail and then clean it with alcohol to get all the toner off the transfer roller.

I cleaned all the baked on toner off the toner drum.

I'm replacing the transfer roller Monday. Meanwhile the printer is printing clean for now.
by ywoodland on Mar 18, 2006 at 8:00pm Add comment