HP LJ3 50 Service Error - Update

[H. E. Taylor]

Greetings,
I am trying to figure out if the problem is the fuser or the
power supply.

The two AC leads on the fuser show an open circuit.
The two AC lugs from the PS which go into the fuser have ~120V.
The +24, +5, & -5 voltages are present on the side port.

I take this to mean that the problem is either the lamp or
the thermal cutoff electronics.

Comments?

<adthanksvance>
-het

 

[jbuch]

Greetings,
I am trying to figure out if the problem is the fuser or the
power supply.

The two AC leads on the fuser show an open circuit.
The two AC lugs from the PS which go into the fuser have ~120V.
The +24, +5, & -5 voltages are present on the side port.

I take this to mean that the problem is either the lamp or
the thermal cutoff electronics.

Comments?

<adthanksvance>
-het

Yes, It seems so.

There is a fuse like thing in series with the lamp.

If you pull out the fuser and look you can figure out how to get into
the middle of the fuser and get direct access to the fuse thing. In the
middle of the "leading edge". At that stage, you can determine what is
open... the lamp filament or the fuse thing.

It is a lot of detailed work to replace the lamp, and cost wise, getting
a rebuilt fuser is far better for you.

I never located a source for spare fuse things, so.... you need to most
likely trade in the fuser for a rebuilt one..... or buy another printer
real cheap and maybe it has a good fuser.

Jim

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[Ben Myers]

HP's spare part replacement unit is the entire fuser, which can be removed
easily by unscrewing 4 screws. Companies selling spares for older HP printers
have followed suit, usually with a trade-in of the old fuser. HP probably does
not sell spares for the LJ III any more... Ben Myers

 

[Eodyg]

http://www.partsnow.com/

They sell parts for Canon SX laser engines.

As for replacing the entire fuser assembly, it depends on what condition the
upper roller is in. If the upper roller is in good shape (no obvious scratches
in the coating, etc) then it would be cost-effective to replace the fusible
link and/or the bulb. If the upper roller is scratched, you should either
replace or rebuild the fuser.

I used to rebuild them all the time for the computer company I worked for. It
takes about $50 worth of parts and about an hour, once you've done it once or
twice. Considering that a rebuilt unit costs $100 or more it may be worth
looking into. You can buy a new laser printer for $150 these days (or less) so
you have to decide which method is the most cost-effective for you.

I have a Brother HL-8e which uses most of the same parts. Parts Now! was able
to hook me up with the parts I need to rebuild my fuser. I'd get a new printer
but I'm something of an expert at fixing Canon SX engine printers, and they're
like VW Bugs or DC-3s--they're very long-lived as long as you take care of
them.

BTW Ebay's a good source for spares. I got a fuser, AC power module, a couple
of paper trays, and a memory board for around $35 shipped. The fuser has some
scratching on the upper roller but it's in my parts box as a usable emergency
replacement.

I hope that helps.

Ed Hering

 

[erie patsellis]

Best parts source for all canon based lasers: www.theprinterworks.com

erie