asked Feb 22, 2013 at 9:14am
Hp HP LaserJet 4

Laserjet 6L cartridges dirty prints

Tried 4 different previously used HP cartridges in 2 different LJ 6L printers. Each cartridge produces a different amount of all over even gray haze on prints, irrespective of which printer is used.
Read Moe's answer to another that "... drum wiper blade internal in the cartridge. It will go bad sitting for a long period." I have a new HP cartridge that's been on shelf unopened for three years. Before I use it:
Can a new drum wiper blade be damaged by the printer? and
Can drum wiper blade go bad on unopened cartridge?

No to the first question, yes to the second. My strangest incident in that regard was a brand new sealed in original packaging HPII cartridge. It was over 10 years old. I opened it up and took it apart and the drum wiper blade was deteriorated to small crumbly black pieces stuck on the metal plate.
by moe on Feb 22, 2013 at 9:40am Add comment
THANK YOU Moe. I think the 'new' unopened cartridge actually was signicantly more than three years old, but I guess I lucked out. I put it in and the prints were nice and clean. So we proved that the drum wiper blade was definitely the problem on four slightly used OEM cartridges, and there was nothing wrong with either printer.
by dunnbob on Feb 22, 2013 at 10:24am Add comment
There is a date code on the box. Something like 6D13YZ
Translated it would be 4/13/06 Toss the YZ part
First number is year, second digit is month, next 2 numbers are day.
by moe on Feb 22, 2013 at 10:29am Add comment
Couldn't find a date code on box (unless it's R74-7001-410), but the copyright date on the instalation guide is 1997!
by dunnbob on Feb 22, 2013 at 10:37am Add comment