Toner Recycling
The toner recycling coil in the tube [A] transports the toner collected by the drum
[E] | [F] |
| |
| [B] |
| [D] |
[A] 
[C]
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)
PTM | B070/B071 |
