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echo: tech
to: mark lewis
from: Roy J. Tellason
date: 2003-06-28 12:06:04
subject: laser printer

mark lewis wrote in a message to Roy J. Tellason:

 ml>> not the pattern on each... the pattern across all of them
 ml>> together... put the first one down and then the next and so
 ml>> on head to tail... it is possible that the drum is larger
 ml>> around than the paper is long... make sure you get them in
 ml>> the proper order and oriented right... it is likely to be
 ml>> just one line on the drum... you can tell this if the lines
 ml>> are all the same distance apart across the sheets... there's
 ml>> no way i can do an ascii drawing to show what i'm talking
 ml>> about ;(

 RJT> I've held these next to each other,  there's no way to match
 RJT> stuff up...

 ml> not next to... END to END in the order in which they were
 ml> printed...

Hmm.  At this point in time I have *no* idea in what order these were
printed.  I suppose I could print some more...

 ml> [trim]

 ml>> i didn't say take it apart... it may be possible to rotate
 ml>> the gear while sliding the ruler in the same way that the
 ml>> gear in a cdrom drive drives the door open on its toothed
 ml>> rail...

 RJT> Grabbing handy sheets,  there's one line about 1/8" from the 
 RJT> top,  another one about 3/16" below that,  three more a bit over 
 RJT> 1/16" spacing below that,  another one 3/16" down, then almost an 
 RJT> inch of no lines (though there's print in there like there's 
 RJT> supposed to be).  Then two lines real close together,  almost no 
 RJT> space between them,  another one with a bit more room,  another 
 RJT> 3/16" gap,  a gap of about 3/8",  one that's abou tan inch,  
 RJT> another line 1/16" down, then one 1/8" down,  then a gap of about 
 RJT> an inch.  It goes on like that,  the pattern varying with not 
 RJT> that much regularity to it.  The third page I have here shows 
 RJT> several lines that are close enough together to make an almost
 RJT> continuous blur of gray,  some of them over 1/8" wide.  This 
 RJT> doesn't show up the same way on either of the other two pages...

 ml> that is wierd... i was hoping that you were getting one or two 
 ml> lines per page...

I think I was,  at one point.

 ml> it does sound like something's gotten hosed... probably from 
 ml> sitting for a while with a scraper/cleaner against it... hummm, 
 ml> speaking of which, most HPs have this long bar that has some thick 
 ml> "cotten" stiff on it for cleaning the final heater roller on 
 ml> output... has this been changed when you change cartridges? 

Never changed any cartriges on this printer.  Only got this one toner
refill kit with it and I haven't used that yet...

 ml> AIR, its generally under a green door... and ususally pretty warm 
 ml> if the printer has been on for a while...

This thing is weird,  very narrow (4-5"?),  about a foot tall,  and
roughly that front-to-back.  There's a door on top where finished comes
out,  a door on the right where paper lays,  and a door on the left that's
normally closed.  Opening that one I see the drum,  mounted in an assembly
of black plastic with four green squares on it.  Grabbing the assembly at
those four points,  the whole thing pops out.  On the inside of that is
where the toner woud be applied,  there's what appears to be a filler cap. 
Looking on that side there also appears to be the "corona wires"
that I've seen mention of, in a plastic assembly.

There's no obvious sign of how to open this thing any furtber,  of any
electronics in it,  or of what makes all the noisess when you turn it on
and it gets itself ready.    I'll poke into it further at some
point...

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