[rescue] LaserJet 4 glitch

Phil Stracchino alaric at metrocast.net
Sun Oct 26 12:26:44 CDT 2008

Erie Patsellis wrote:
> HP uses opto isolators with a vane that indicates paper passage, the 
> vane moves out of the way, IIRC. With a #2 Phillips screwdriver, an 
> hours time and the slightest of mechanical aptitude, you can clean the 
> entire printer, which typically resolves the phantom paper jam error 
> (dust gets on the opto isolator),

Ah!  That would make sense.

> while you're at it, I'd replace the 
> output delivery rollers, around $15 from the printer works. 
> *http://www.theprinterworks.com *(see same source for exploded drawings, 
> and any part on about any Canon base printer), they also have a complete 
> roller kit for about $50, in my experience, it makes a tired old 4+/4m+ 
> work like new.

That seems a sound suggestion.

  Phil Stracchino, CDK#2     DoD#299792458     ICBM: 43.5607, -71.355
  alaric at caerllewys.net   alaric at metrocast.net   phil at co.ordinate.org
         Renaissance Man, Unix ronin, Perl hacker, Free Stater
                 It's not the years, it's the mileage.

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