Toner Near End/Toner End Detection - Ricoh B202 Service Manual

PROCESS CONTROL

6.2.6 TONER NEAR END/TONER END DETECTION

[A]
Introduction
Toner Near End
The controller considers the following information to determine the toner near end
status:
• TD sensor [A] in the development unit
• Operation time counter of the toner attraction pump [B]
• Memory chip [C] on the toner cartridge
• Toner end sensor [D]
There are two different toner near-end detection procedures (referred to as "Toner
Near End Detection 1" and "Toner Near End Detection 2"). The machine enters the
near-end condition if either of these is detected.
Toner End
To determine the toner end status, the controller considers the following
information:
• TD sensor [A] in the development unit
• Pixel counter
B202/B178/B180
[B]
6-16
[C]
[D]
B178D511.WMF
SM