Crum - Samsung CLP-325 Series Service Manual

2.2.3 CRUM

The CLP-320N engine will be equipped with electronics that can read and write data into NVRAMs otherwise
known as CRUMs that reside within 1) C, M, Y, K Toner cartridges.
The CRUM has a company ID, and electronics logo.
The toner CRUM also identifies the type of toner cartridge (Standard or High Capacity). The CRUMs contain
fixed data such as the low warning point, specified life point, and hard stop point (on toner)
and also store the current life count (pages count, pixels count, images count) and % of usage (gas gauge)
data.
■ In the case of Refill Toner Install
1) Perception of Refill Cartridge (when power is on or the cover is closed)
End of Life / life span data initialization -> judge to be Refill Cartridge
End of Life / life exhausted (simple refill) -> stop printing caused by life exhaustion
2) Operating
It is impossible to control appropriate development parameters, for there s no toner specification data.
It runs with the setting of default development parameter. (Image quality will be degraded, for the lack of
appropriate respond to the change of time and environment.)
■ Process after CRU life expiration
1) Record the information of End of Life.
2) Clear some information of Operation Area.
-> Supplier/Model Name/MFC date/Serial Number (Manufacture Information)
-> Let cartridge refiller initialize manufacture information and life span information.
Service Manual
Product spec and feature
2-25
Samsung Electronics