print quality problems from hp laserjet 1200

pennymakespounds

always been a superb printer ... but recently copies have got a
black "dot" / mark .. about every 1.5 inches .. up the middle of every page printed .

Any ideas what..or how to solve ??


i have taken the laser toner cartridge out and given it a shake ... no differrence ..

have also just run through the machine a "fellowes fax & impact printer cleaning sheet".. that i had handy !!.. use them on my thermal fax machine ... again made no differrence .

any ideas ??

Eyesparky

Not sure about your model but had a similar problem with a different one years ago ... it will most likely be damage to the transfer film. Not sure if this is integrated in your cartridge or a separate consumable on your printer but I needed to replace the film cartridge/drum. Sorry if this is a bit vague.

Graham_Devon

There is probably a piece of dirt, or stuck toner on the drum/image unit which is inside the cartridges on those. If you have another cartridge handy, try that.

zappahey

HP troubleshooting guide is here http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=29789&prodTypeId=18972&prodSeriesId=29789&objectID=bpl04071 but it's almost certainly the drum and you'll need a new cartridge.

albertross_2

Check the toner cart for speckles of toner, if you don't find anything, check the drum for burnt on toner, if you find it, remove if very carefully with a blunt object (wooden lollipop stick etc), as any damage to the drum will show up on every print.

Little_John

It does sound like the drum but you should also check inside the printer to see if there are any peices of plastic orange on one side and grey on the other if you find it it will be the same shape and size of the marks on your page. This is the fuser unit falling apart they can be replaced but can cost about the same as buying a new printer depending the model you have.

to test do a print that will cover the marked area in black a black box or somthing, then rub the page where the marks normally are the toner will come off or smudge. another clear indicator the fuser is failing or has a hole in it.

Cricri

Also, I normally always try to save money, but I got problems (marks as well) with a compatible cartridge for my LJ1100. Next cartridge I get is a genuine HP.

Katgoddess

We had this problem with a printer at work that is normally sitting in the cupboard and not used regularly. We brought a new cartridge and it was fine.