Yes I know it's a very old B&W printer. I obtained it about 20 years ago for the price of a new HP toner cartridge (about £70).
It has operated very well and has only had one hardware fault previously - the fuser heater failed several years ago. I bought a unit from "the bay" and swapped it and everything was hunkydory again. The toner seemed to be running out recently and the print became faint. So I bought a cheap clone toner cartridge but this didn't improve things. Exactly the some faint print
I have had a play with it and it does seem to be a hardware fault.
From reading up on how a laser printer works is it possible there is something wrong with the corona charging wires / system? Can these be cleaned? Can't actually see them?
Any early HP laser printer experts out there please? Otherwise it's for the "Printerland in the sky".
It has operated very well and has only had one hardware fault previously - the fuser heater failed several years ago. I bought a unit from "the bay" and swapped it and everything was hunkydory again. The toner seemed to be running out recently and the print became faint. So I bought a cheap clone toner cartridge but this didn't improve things. Exactly the some faint print

I have had a play with it and it does seem to be a hardware fault.
From reading up on how a laser printer works is it possible there is something wrong with the corona charging wires / system? Can these be cleaned? Can't actually see them?
"Corona wires - There is a primary corona wire and a secondary wire or transfer wire. The primary corona wire is important for charging the drum positively, which is necessary for attracting the toner particles to the surface."
Any early HP laser printer experts out there please? Otherwise it's for the "Printerland in the sky".
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