Canon MF8100 Series, Service Manual, Page: 57 / 296

Chapter 2
2-21
F-2-35
Note 1. In full-color printing, the detection is performed for the cartridges in each color. In monochrome printing, it is performed just for the Bk cartridge.
Note 2. If the toner level written in the memory tag is lower than the detected toner level, data is not updated.
2.3.6 Drum Cartridge
2.3.6.1 Outline
0008-1710
The machine's drum cartridge is equipped with a mechanism that forms images on the ITB. The drum cartridge consists of a drum cartridge and an ITB unit con-
structed as a single entity.
The following shows the machine's cartridge and the arrangement of loads.
DCNT Board
T
ONER LEVEL DETECTION signal
(T
ONS)
LED DRIVE signal
(P3.3V)
Developing rotary/
toner level detection circuit
Toner cartridge
Light guide
Stirrer
Light
emitter
Light
receiver
<Low toner level>
<High toner level>
Toner
Light
emitter
Stirrer
Light
receiver
Light
receiver
Light
emitter