Path: utzoo!attcan!uunet!nancy!wsrcc!wolfgang
From: wolfgang@wsrcc.uucp (Wolfgang S. Rupprecht)
Newsgroups: sci.electronics
Subject: Re: Need help with HP LaserJet II (unit partially (?) dead)
Message-ID: <1990Oct11.152443.3345@wsrcc.uucp>
Date: 11 Oct 90 15:24:43 GMT
References: <11229@life.ai.mit.edu>
Organization: Wolfgang S Rupprecht Computer Consulting, Washington DC.
Lines: 23

mbeck@ai.mit.edu (Mark Becker) writes:
>I've been given an HP LaserJet II.  And, no, it doesn't work.  
>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 last sentence says it all.  Just leave the "cold" off.  The fuser
sounds fused. ;-) Measure the DC resistance.  Also check the
resistance of the heater connections to the fuser/LJ-II case.  Now
call HP and find out what the correct values for both should be.  HP
might also sell the service manuals.  Probably a nice thing to have.

-wolfgang
-- 
Wolfgang Rupprecht    uunet!{nancy,usaos,media!ka3ovk}!wsrcc!wolfgang
Snail Mail Address:   Box 6524, Alexandria, VA 22306-0524