Original HP Laserjet printer, free in Maryland...

[Alexandre Souza - Listas]

>  They do not use the same engine.  They are similar (since they use the
> same physical cartridge) but the way the operate is very different.  The
> CX laser printer engine uses a laser diode (I don't recall if it is
> visible or infrared) to scan across the drum, while the PC-1 photocopier
> uses an incandescent lamp to illuminate a strip across the page as it is
> scanned.  The wavelength and amount of radiant energy involved are
> completely different.

    This is something I didn't though...Thanks for shedding a light on the 
subject, Dave!