mbeck@ai.mit.edu (Mark Becker) (10/09/90)
Hello. I don't quite believe my luck.. or non-luck. I've been given an HP LaserJet II. And, no, it doesn't work. (The giver wanted an LJ-III and didn't want to bother having the LJ-II repaired). I can turn the unit on.. Can hear the motors move. The front panel lights go on normally and the display says "05 SELF TEST". It gets through that okay.. then the display says, "02 WARMING UP". And it sits there, "WARMING UP". Never seems to come out of it. The room lights on that line dim occasionally from a high current draw. They return to full brightness after a second or two.. which makes me think the printer electronics are protecting something. I turn the machine off, stick my hand in there, and the fuser area is dead cold. The front panel lights do not re-light. The best I've done is measure continuity through the fuser heating element (using an ohmmeter).. but beyond that, I'm stuck. I have no ideas where to peer next inside this beast. Before I telephone HP Service (ouch), can anyone suggest a possible course of action? Possibly something simple died that I can easily fix? Maybe a blown fuse in the power supply going to the thermal regulator on the fuser? Suggestions for other tests would be appreciated. It would be nice to get it running... Regards, Mark mbeck@ai.mit.edu