Even, grey vertical band on RHS of laser printer output

[Freddyfruitba...]

Any ideas what's causing it? I'm guessing it must be a fairly cut-and-dried issue, but Google isn't helping. Everything looks clean inside the printer and I've given the cart a good shake (which concludes my knowledge about printer servicing)

This is an otherwise blank printed page of A4 (text etc prints fine).
It's an ancient B&W HP LaserJet 5:

https://i.imgur.com/aoyaXPv.jpg?1
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[2Hondas]

3 main parts to a laser printer as I understand it.

1. The Toner (powdered ink)
2. The Drum - When printing, the drum rotates, and toner gets laid out out onto it. The paper gets rolled onto the drum and the toner transfers to the paper.
3. The Fuser - 'burns' the toner from the drum onto the paper.

A big grey band is most probably the drum.
If you're lucky then you can just remove it and give it a wipe to get any un-transferred toner onto it. Although there must be a reason why there's un-transferred toner on it.

It could be the fuser isn't working at that end of the drum, or it could be a big wodge of toner has got itself stuck somewhere the drum rotates, and it's smearing itself over the drum every time you print.

If the drum or fuser are knackered, it's generally new printer time, as they often cost more than the printer is worth.[/list]
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[Lord Percy]

It's too perfect for the issue to be caused by some kind of ink leak.

Definitely an electrical problem.

These kinds of printers work by putting an electric charge on specified locations of the drum, which then attracts ink particles which are pressed on to the paper as it rolls past.

For this reason, I'd suggest there's a constant charge being passed to the end of the drum.

It's a laser printer so the charge is provided by a laser hitting the drum where a charge is desired. The laser must be uniformly hitting the drum, constantly, at the end. Or there's some other thing causing a constant charge at that end.

That's as much a I know. Useless really.

TL;DR: Problem is electrical. Probably can't be fixed with a bodge.

EDIT: Found this image:

https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Laser_toner_cartridge.svg/500px-Laser_toner_cartridge.svg.png

Something in that assembly - some part where the laser or the electric charge provision is involved - is broken or needs cleaning.

[UnknownStuntm...]

You could try the cleaning cycle most HPs do, but I reckon it's the fuser. Replace it. You can buy just the fuser film separately for about £20, but make sure you put plenty of high temp grease in if you do.

[-]

Laserjet 5?

Its pushing 20+ years old, bin it and but a refurb LJ4200 for £45 delivered.

Most parts, fuser, transfer roller, laser assy, will cost more.
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