Toshiba E-STUDIO900 - Manual (Page 88)

PTM 2-63 B070/B071
Toner Recycling
The toner recycling coil in the tube [A] transports the toner collected by the drum
cleaning unit to the toner entrance tank [B] for recycling. This toner is dropped into the
toner entrance tank and mixed with fresh toner from the toner bottle. The toner bank
motor [C] drives the toner transport coil via the toner supply coil clutch [D].
The new toner separation shutter mechanism (toner recycling shutter solenoid [E] and
shutter [F]) reduces the amount of paper dust in the toner. During recycling, paper
dust gradually collects in the toner, which can cause black dots to appear on copies.
At the prescribed interval, the toner separation mechanism purges all toner from the
toner supply system and replaces it with new toner, as described below.
Normally during toner recycling, the toner recycling shutter solenoid remains on and
the shutter remains open, but when the number of copies exceeds 200K, the toner
recycling shutter solenoid switches off and the shutter closes.
After the solenoid switches off, no toner recycling is done for the next 25K copies, and
all used toner is sent to the waste toner collection bottle without recycling. Toner from
the toner hopper takes about 20K copies to pass through the recycling path cleaning
and collection tubes, so during the 25K copies after the solenoid switches off, all the
toner in the toner supply path is purged from the system and replaced with fresh toner.
NOTE: The timing of this operation can be adjusted with SP2975 001, 002 (Toner
Recycle Cut Counter – ON Counter/OFF Counter). SP2975 001 determines
how often the toner is purged (default: 200k), and SP2975 002 determines
how long the purge is done for (default: 25k copies)
B070D904.WMF
B070D906.WMF
[A]
[C]
[D]
[B]
[E]
[F]