Paper jam 1. Fuser rollers not rotating.

I've got the same problem with mine.  The teeth became disengaged and wouldn't let the motor drive any of the paper handling rollers.  I was able to get it working again by simply squeezing the clutch back together to get the teeth to re-engage.  I don't know how long that fix will last, and if I have a page jam and have to pull the paper out in a way that causes the rollers to reverse it'll probably disengage again.  On the bright side, at least it's easy to pull the fuser assembly out the back :)

Hi there,
Hope this helps, We had a similar problem with a brother colour laser.
If you carefully remove the fuser rollers and toner cartridge grab a moist/damp cloth soaked dishwashing soap, not to wet but and carefully wipe down the fuser rolsers and toner rollers.
Remember toner is toxic so be carefull
Be carefull not to nick the rollers, if anything chips it or scratches it it will mark everything else.
And yes envelopes if fed incorrectly can gum up the rollers.
I have also used metho to carefully clean down all the rollers before just dont use too much.
Another handy tip is follow the path that a sheet of paper travels and watch where it gets caught exactly.
IF you do pull it all apart, Just make sure you take it slow and watch where everything goes to put it all back. Also make sure that you discharge the unit before opening it up so there is no high voltage inside.
Also if you find that the toothed clutch is worn chek out ebay for spares for your model.
Cheers
Hope this helps
Steve