I have a Toshiba DP120F fax machine and I'm getting a black line down the lenght of my faxes on the left margin. How do I make it go away?

reset drum Counter for DP120

Turn fax off. Hold down 0, 1, 3 on numeric key pad and turn fax on. Then release the 0, 1 & 3 and enter the number 80, wait a few seconds and should see a message confirming counter has been cleared. Then turn fax off and on again

Pull the doc feeder open and clean the scanner glass

It could be 2 things...

1. Your scanner glass is dirty...open the doc feeder and clean the glass. probably Wite-Out.

2. A segment of your scanner assembly lamp is burned out. Not good, uneconomical to repair.

Change the chrage roller and the OPC drum and cleaning blade.

please specify model no. of the machine & black line comes when u receive faxes or when u copy ? please let me know then i'll be able to provide solution. Thanks

There should be an On / Off switch either on one of the sides (down low) or on the rear. Especially if someone moved the fax recently, it is easily turned off, without knowing that. Let me know.

Yes. You may download the service manual at this website:
http://fusers.com/toshiba/laser-fax-machine/dp-125f-digital-fax-laser-mfp.html

Note: Scroll down till you see the "attachments" heading.
The manual is a PDF.

You're welcome.

With the little information, excluding make or model or mode of fax machine, whether feed through or flat scanning ( I even have one that does BOTH, and scans on a flat bed with a multi sheet feeder) I can only guess that somehow your memory is compromised.

Try this, in case you haven't already done so.

Set up the machine to fax a document over a short time period, like 10 minutes or so, from the time the trial begins and listen for the tones or pulses, and if there are none as you suggest, try thoroughly downing the machine for an hour or more, and reconfigure upon restart, as to date, time, fax mode, and so forth [the latter brings to mind the fact that your mode may be set to "manual," which would also account for your problem] and see if such a memory flush clears the memory, so that it can handle new commands.

Remember, before you start to check the present mode of the machine to determine whether it is set to MANUAL.

Manual mode will cause most machines to ignore commands like telephone numbers or future fax commands.

On my Brother fax machine, there is a blue plastic cleaning thingy on the toner cartridge used to clean the metalic wire. If you leave it on the wrong side after cleaning, you get a thin black strip down the edge of every page. Slide it over to the other side and problem goes away.

take out cartridge, look at he inside of machineis there toner on the left side of a thin glass, look at the fuser ( where it gets hot) are the rollers O.K. ?