Indeed Javad, the machine says the toner is empty when there is
substantial toner left.. It's the same with the 2300 and 2450. I
wonder why the manufactures do that ? to be helpful maybe ? or could
there be another reason ?
What I do is to weigh an completely EMPTY cartridge with my digital
kitchen scales, and then take the cartridges out and check their
weight.
Inside the access lid of most machines there's a catch that allows the
manual rotation of the cartridges, check the service manual..
I can only remember the 2300 weights as I don't use the 2450 very
much.
The empty 2300 cartridge is 500gm and full it's 650gm, the machine
says empty at approx 540. You can manually reset the capacity
indicator on the 2300 cartridges with a small screwdriver inserted in
the slot by the silver tab.
The cartridges that have "Chips" are easy enough to refill and the
chips don't always need changing, if they DO, they're only a fiver..
On some machines the OPC drum also collects the waste toner, you can
replace the fuse and empty the waste toner and send the drum on
another 35,000 page cycle using a simple tool and process. You use the
tool that's in common use for the "Melt and Pour" technique and you
melt a hole in the opc/waste toner drum and empty it, covering the
hole with adhesive tape afterwards. I've got 3 complete cycles from a
2450 drum with no apparent quality degradation.
The best people to talk to about toner refills are the UK experts,
http://www.refilltoner.com/toner_refill.htm
Just in case you're wondering, I have absolutely no affiliation with
them whatsoever.
Basil
www.waikiki-islanders.com