Homebrew PCBs

Mike Nash wrote:
> This is a decent explanation of how a laser printer works:
> 
> http://home.att.net/~t.f.cook/tc11.htm

This article is crap.

   Photosensitve drum has a high voltage that is provided by the high voltage
   power supply that charges the drum opposite of what the laser beam is
   charged,

Since when have photons had charge?

           so that the laser will charge dots on the drum that will form
   the image of what is to be printed on the drum and is charged this way by
   the primary corona wire.

The laser doesn't charge the drum, and the image forming mechanism of
the drum coating isn't even mentioned.

> I also seem to remember that in the early days at least, there were two
> different types of toner because the laser printers tended to be the reverse
> polarities on the coronas than the copiers.