Looking for some HP LJ3 repair hints and a paper tray

Philip Pemberton wrote: There are two different PCB's involved in dealing (directly) with the fuser. One supplies power to the lamp. The other monitors temperature, etc. The supply has an overtemperature cutoff device that breaks the circuit to the filament. If you don't see 24V at the lamp, this could be open (i.e. broken). There is a thermistor located near this cutoff device that performs temperature *control*. It obviously relies on a processor (hence is not a reliable means of preventing OVERtemperature cutoff :> ). I have a note (to myself) about replacing an upper fan to fix an intermittent "50" error. You might want to check if the fan is bound, shorted, etc. <frown> But you are sure that your *first* attempt you didn't leave power on long enough for 50 to set? (Once it sets, you have to wait 10 minutes for a cap to discharge before it will "try again") Ah. Well, I have good news, bad news and REALLY bad news... :< The good news is I have a document that is a collection of HP FSE "notes" concerning the legacy LJ's. I.e. things that FSE's encountered in the field plus the fixes they found for them. Among these notes are: ------------ Intermittent 50 Error (can be associated with paper jams) 1. Replace Fusing Assy Cable known to be intermittent (see service note 33440A-09) 2. Replace AC Power Module Cable ------------ I mention this because you mentioned paper jams (?) The bad news is this document is 5M. I also have a *consumer* version of their service manual (about 20M). The REALLY bad news is the document you REALLY want to look at I probably can't send to you (it is in with my "NDA" documents which means I probably signed something at some point in time stating that I wouldn't disclose it or its contents :< Sorry, I take these sorts of things seriously.) The other really bad news is I sit behind a dialup connection so uploading any of these is a bitch for me. But, I can probably get access to a high speed connection from friends, etc. in a pinch. It's unfortunate that you're on the other side of the pond. I could probably get you a whole LJ3 for less than the cost of mailing a first class letter to you! :< (I finally discarded my last LJ2 & LJ3 due to lack of space -- despite the fact that toner was so dirt cheap at $16! Though the wasted BTUs probably weren't helpful :< ) Let me know if you want me to hunt down a faster connection... --don