Member Avatar for joshuu

I encountered a laserjet 6l that is printing the paper completely black .I exchanged tthe catriadge with a working one and the problem still exists.Earlier it showed that it had an error like the printer door was open although everything looked fine and I had to open the screws to open the outer case and I realised that the "component" that senses
the printer door is open was out of position and after repositioning it and returning the case ,the error was gone but now it prints the whole paper black.Im lost ,I dont know whatsup.

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  • Latest Post Latest Post by goldeagle2005

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Short diagnosis and next steps based on the thread: already tried a known-good cartridge and corrected the door sensor, so the toner itself is unlikely to be the culprit. As pointed out, printing depends on several electrostatic and transfer stages; a sheet that comes out completely black usually means toner is being applied across the whole drum or all the toner is being transferred to paper instead of only where the laser wrote the image. Since correctly suggested service, focus the troubleshooting on a few safe checks that can separate a simple fix from a job for a technician.

Checklist to try (in order):

  • Print the printer self-test/configuration page from the printer (not from Windows) to confirm the problem is printer-side. If the self-test is also solid black, this is not a driver/PC issue.
  • Power reset: turn the printer off, unplug for 5-10 minutes, then power up and reprint the self-test. This can clear latched errors after the case was opened.
  • With the machine unplugged, remove the cartridge and visually inspect the drum area and transfer area. If you see uniform toner deposits or heavy black contamination on the drum or paper path before printing, that points at the printer’s charging/transfer/developer path rather than the cartridge.
  • Check the door/micro-switch and nearby wiring you touched when opening the case. A misaligned lever or a squashed cable can change how the printer enables high-voltage circuits.

Cleaning and safety notes:

  • If you find an accessible corona/transfer wire with a cleaning slider, you can gently use the slider per the service label or manual; always unplug first and avoid touching the drum surface with bare hands. Do not probe or power the machine with covers removed unless experienced — the high-voltage parts can be dangerous.

If these checks do not reveal or fix the issue, the likely causes are a failed charge/transfer assembly or the high-voltage supply. Given the age of a LaserJet 6L and the safety risk, replacement or professional repair is usually the most practical option.

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Member Avatar for mommacache

For a laser printer to work there needs to be a charge put on a photo sensitive drum to repel toner. The laser itself actually changes that charge where the image should be so that these spaces will attract toner. Apparently the charge to repel the toner isn't there.

This process occurs in the toner cartridge itself and so replacing the cartridge should solve your problem. If that doesn't work it could be a part in the printer that has to do with applying a charge to the cartridge itself (which I know next to nothing about) in which case you should have the printer looked at by a service person.

Member Avatar for goldeagle2005

I agree. It's best to have the device examined by a qualified service technician

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