Deve Crum; Identification Of The Qualified Developer; Recognition Of The Color Of The Developer - Samsung CLP-600 Series Service Manual

3.4 Deve CRUM

3.4.1 General Description
Deve CRUM, used in the photoelectric Dry Color Laser Printer developer, is mounted on the developer. It exchanges
information of the developer with the main body, and at the same time identifies the qualification status and kind of the
developer, and measures the amount used.
Main
Crum Mapping Address
A2
0
0
1
1
3.4.2 Description of Operation

3.4.2.1 Identification of the qualified developer

- The Deve CRUM makes out whether the part used is qualified or disqualified by reading the data of the EEPROM.
- When the data of the EEPROM is normal, the machine will operate normally, and when the data is abnormal
or unrecognizable, it will output alarm message and stops printing.

3.4.2.2 Recognition of the color of the developer

- Through "device select code" and "chip enable input", it judges whether a correct developer with correct color
is mounted or not.
3.4.2.3 Measurement of the amount of toner used
- The Deve CRUM records the information of dot count into EEPROM, informing the amount of toner used and
left over.
Samsung Electronics
Developer CRUM Board
EEPROM
(M24C04-WMN6)
A1 A0 CRUM
0 NC Yellow Cartridge
1 NC Magenta Cartridge
0 NC Cyan Cartridge
1 NC Black Cartridge
System Overview
Chip Enable
A0
A1
A2
Service Manual
3-17