Canon MF8100 Series, Service Manual, Page: 59 / 296

Chapter 2
2-23
F-2-37
2.3.6.3 Memory Tag
0008-1712
The memory tag is a non-volatile memory built into the drum cartridge. It stores cartridge usage condition data. The DCNT Board detects drum cartridge usage
conditions by reading and writing memory data.
A memory tag in the drum cartridge contacts with the memory tag contact constantly when the cartridge is installed in the printer.
After receiving memory data from the memory tag through the memory tag contact, the DCNT Board updates data with specified timing and rewrites it to the mem-
ory tag.
The DCNT Board instructs the memory tag to read or write under the following conditions:
<Read>
- Power is turned on.
- Top cover is closed.
<Write>
- After 50 papers printing.
- When a Change Has Occurred to the Data on the Lives of Parts.
DCNT Board
Auxiliary
ITB cleaning roller
Main motor
ITB cleaning roller
Roller
engaging
clutch
Engaging cam
Bushing
Engaging
drive gear
Bushing
Engaging cam
ITB cleaning
roller
ITB
<Engaging> <Disengaging>
Roller
engaging
sensor
Auxiliary
ITB cleaning
roller
PS714
DCM
701
CL2