witzend

asked Jul 11, 2007 at 1:35am
Hp HP Color LaserJet 3550

HP Colour Laserjet 3550 Problems.

I have searched this and many other forums before posting here and have seen many similar faults but not the same.

The printer has a very poor image, faint, throughout the page on all colours. I have checked the event log and get the usual density sensor out of range on 11, 13 & 14.
I have a working machine which I have been using to swap parts to isolate this problem and so far have tried the following. All boards, Laser unit, R/H gear assy, paper pickup assy, consumables, consumable movement gearing. Have tried the diagnostics metods of calibrating the system and cold resetting everything.

I am very confused about this one if anyone has any thoughts