System Overview
Samsung Electronics
Service Manual
3-17
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.
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.
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