View Single Post
  #7   Report Post  
Posted to sci.electronics.repair
Jeff Liebermann Jeff Liebermann is offline
external usenet poster
 
Posts: 4,045
Default Printer Overhauls?

On Thu, 12 Nov 2009 19:05:53 -0500, "(PeteCresswell)"
wrote:

This is a pretty good representation of the page:
http://tinyurl.com/ykkjvqv


Yech. My guess(tm) is that there's toner and crud everywhere, mostly
in the transfer roller. It's not repetative so it's either coming
from multiple filthy rollers. If it were an electronics or laser
scanner failure, it would print black or white, not gray.

See:
http://www.printertechs.com/tech/repdef/ruler4000.php
See if you can match up the pattern. There's a better copy of the
page in the HP4000 manual.

I'm not getting decent answers to my questions, so I'll try again,
this time in detail, with a few additions. In the future, the more
information you supply about the symptoms, condition, situation,
history, and diagnostics run, the easier it is to diagnose.

1. How many pages are on the printer test page?
http://www.mlsd.net/helpdesk/docs/hp4000.pdf

2. Are there any stripes on the *BACK* of the page?

3. Is there toner all over the inside of the printer? Have you been
using refilled toner cartridges, which are often overfilled with
toner, and dump toner everywhere? Have you moved the printer with the
toner cart still inside? Is there loose toner on the paper that
smears off when you rub it with your finger? If you're not sure if
there's toner all over the printer, just take a piece of towel paper,
add some alcohol, and wipe the black plastic area under the fuser.
Stay away from the transfer roller. If the rag comes out black, it's
toner.

4. Is this with a new toner cartridge? Have you tried a different
toner cartridge? Did the stripes start when you replaced the toner
cartridge?

5. Are you using MICR toner? Just curious as I've noticed that it
tends to make a bigger mess than ordinary toner.

6. Have you inspected the fuser assembly?
http://www.imagingsupplies.com/fuser-assembly-instructions/HP_4000_FUSER.pdf

7. Do you have an air compressor? If so, use it (outside the house).

I'm still recommending wholesale replacement of the rubber parts and a
general cleaning.


--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558
# http://802.11junk.com
#
http://www.LearnByDestroying.com AE6KS