8 Sep
2004
8 Sep
'04
4:15 p.m.
Does the collective list wisdom include repair hints for an HP LaserJet
IIISi? I have one. Yesterday, I turned it on, same as a zillion times
Alas I've only worked on series 1 (CX) and 2 (SX) printers. But those I
have _worked_ on (as in totally taken apart, investigated, reassembled --
without the manuals).
before, and it didn't come up normally; it was
making an odd ticking
noise. I went to see what was up and smelled that unpleasant smell
Maybe an SMPUS that's tripping due to a short on the secondary side
somewhere. Could, of course, be a short in the load (e.g. motor driver,
decoupling capacitor)
that usually means the magic smoke has been let out of
something. I
turned it off immediately and have been spending the last hour or so
trying to figure out how to disassemble it to find out what's fried
(and try to estimate how user-replaceable it may be).
The SX is _very_ modular and comes apart into official FRUs in about 10
minutes. The CX is somewhat worse, some of the sctions come out in bits.
None-the-less these are not that hard to work on, so I assume the IIISi
is not too bad either. The outer casing should come off easily when
you've found the right screws....
-tony