On Nov 7, 9:54*am, Fernando Peral
wrote:
The printer prints well, but it prints with a dirty band of near 2
centimeter width all across each page in the left part of it.

A light leak, or a dirty corona wire, can do something like this.
Light leaks usually mean a case part is not closed properly.
The corona wire has a HV connection and is usually reachable (on
some models it's in the printer, on some it's part of the cartridge).
Alcohol on a cotton swab is appropriate.