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.

Main motor

DCM

Roller

701