asked Jan 17, 2001 at 3:32pm
Hp HP LaserJet 4

HP Laserjet 4

This has started to give intermittent service 57 error codes, however it often functions OK.
I believe, from earlier postings that this is a main motor fault, however as it is intermittent, hopefully the gear train just needs cleaning.
Could someone please explain how to dissasemble this printer to inspect the gears (It's not as easy as my old LJ2)and what lubricant to use on the plastic gears (Assuming they are plastic)if any.
Thankyou in anticipation of your help.
Dick Payne Norwich Norfolk UK.
It could be a cartridge problem. The gears don't really need lubing. The motor just drives the cartridge drum, the fuser and the exit rollers. It's either going to be a bad cartridge or a bad motor. I thought we added that to our kit line up recently. I just looked and it seems to have been left out. I'll have it corrected.
by moe on Jan 17, 2001 at 9:51pm Add comment
Hi I have the same problem but my service 57 stays on all the time. Did you solve the problem? How?
by George on Oct 8, 2001 at 6:11pm Add comment
We do have a 57 error kit available in our printer repair kits section.
by moe on Oct 9, 2001 at 9:35am Add comment