Toner Supply Mechanism - Ricoh B230 Service Manual

toner to the development unit.
The toner end sensor is attached to the toner supply tube. The toner end sensor and the
output from the process control define when the machine detects toner end.

6.7.2 TONER SUPPLY MECHANISM

Toner supply from toner bottle to toner attraction pump
The toner transport motor [A] rotates the toner bottle-Bk via gears and a clutch. It also
rotates the toner bottle-Y, -C, -M via gears, clutches and timing belts.
Each bottle has a spiral groove, and this groove moves toner to the mouth [B] of the bottle.
Here, toner spills into a hopper [C]. The opening [D] of the toner hopper is normally closed
if the toner bottle is not installed in the machine. When the toner bottle is installed in the
machine, the transport tube [E] pushes the toner hopper shutter [F] and then the opening of
the toner hopper is open.
The toner passes part of the way along the transport tube towards the toner attraction
pump. The toner goes through the toner end sensor [G].
Toner Near End Detection
The toner end sensors [G] detect toner near end conditions ( "Toner Near End/Toner
End Detection" in this section).
SM 6-39 B230/B237