It may take a while for the soldering iron to reach its working
temperature. Meanwhile you can remove the cartridge from your
printer. When the soldering iron has reached its working
temperature (275°C) you can melt a filler opening into the
cartridge (picture 1).
Afterwards deburr the hole thoroughly and make sure that no plastic
splinter gets into the hole. Before refilling the toner cartridge,
you should pour out the rest of the toner powder or exhaust it with
an aspirator for toner powders. Otherwise the physical and chemical
characteristics of the old and the new toner powders could lead to
a formation of clots.
Kyocera TK-590 melt a filler opening
Refilling the Kyocera TK-590, FS-C 5250 cartridge:
Shake the toner bottle circularly so that the toner powder seems to
be floating. Afterwards, screw the funnel onto the bottle and
carefully fill the toner into the cartridge (picture 2). After
refilling you can seal the melted filler opening with an apropriate
piece of textile adhesive tape (picture 3). The filler opening has
to be absolutely leak-free. Through patting it over a white piece
of paper, you can check the impermeability. There should not
trickle any toner out of the opening.
After you have refilled the cartridge the toner chip has to be
changed. It monitors the filling level and signals thrustworthy if
you have to refill the cartridge again. The chip has to be changed
after every refilling.
Kyocera TK-590 refilling
Kyocera TK-590 seal the melted filler opening
Exchanging the chip for Kyocera TK-590, FS-C 5250:
Kyocera cartridges are equipped with RFID-chips, which you usually can not see. At this cartridge type the
chip is hidden below a small yellow label. Remove this label
carefully for example with a small screwdriver and remove the chip
(picture 4). Now insert the new chip (picture 5). Now your
cartridge is refilled and you can reinsert it into your printer.