From: mccla_d@aethelbehrt.cs.odu.edu (dennis mcclain-furmanski)
Subject: Laser Writer II Paper Jam
Organization: Old Dominion University, Norfolk, VA, USA
Distribution: comp.sys.apple2
Date: Tue, 28 Jul 1992 18:10:04 GMT

baughmawkr@stat.appstate.edu says:

> ... out of paper and paper jam lights are blinking ...

First, check the manual to see if this combination is a particular code for
a certain error. In the copiers with similar mechanisms, a similar combination
of lights blinking indicates a burned out roller heater.

If the manual isn't present or doesn't contain the combination of lights as an
error, check the roller heater. First, touch (VERY BRIEFLY! VERY HOT!) the
exit rollers to see if they're hot. If they are, skip to **.

If not, check the bulb. Lift the roller cover and get to the ends of the heater
bulb (a thin tube which extends through the upper roller) and test the 
continuity of the bulb with an ohm meter (with the power off and cord 
unplugged). If none, get someone to replace the bulb. If the ohmage hasn't
leaked out of the bulb (down close to 0 ohms), check the fuse. It's somewhere
along the wiring for the heater bulb -- possibly under the plastic cover of
the exit roller lid you lifted up to get to the rollers. or else down in the
base of the machine, near the back.

If both the bulb and fuse are good, then:

** Open the machine and check the paper sensors -- little levers lifted by
the paper as it goes through. They're on thin silver rods. The ends of the rods
sometimes get all gunked with paper dust, lift up, and won't fall back down.
(You can also test your local gravity to see if it's dropping. It won't help,
but "it's a great way to relax" - Ford Prefect). Some SMALL amounts of WD-40
sprayed directly into the plastic cups which hold the rods, and immediately 
wiped up, will likely free them. A little hand-operation of the rod is
helpful. Also, the actuating parts of the sensors are magents and reed
switches. Look along the rod until you see a place where a little hammer
contacts a small box. Sometimes junk gets stuck in these. The 'paper out'
sensor operates in exactly the same way, and gets the same treatment.

If these don't help, it's likely (though not certainly) an electronic problem.
Contact the LaserWriter Doctor.

Changing the bulb: It can be done in house by anyone with experience with
electrical work and nimble little fingers. Magnetized screwdrivers are 
essential. A copier repair-person is just as capable to replace the bulb as
the LW Doctor, and probably cheaper. All they need is access to Canon parts
or generic equivalents. The LW II is functionally identical to several of the
Canon PC-? (single digit number) copy machines, at least as far as the exit
roller mechanism is concerned. In fact, in one of the LW machines (I can't
recall which one) the mechanism and bulb are indentical to the copiers.

I'd put money on the burned out bulb hypothesis. Check that first.


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>%> Dennis McClain-Furmanski        internet: mccla_d@cs.odu.edu     <%<
>%> Clinical Psychology             AOL: Dynasoar01@AOL.COM          <%<
>%> Old Dominion University         New Beginnings @ Serenity Lodge  <%<
>%> Norfolk, VA, USA, Earth, etc    Chesapeake, VA    800-444-9166   <%<
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