Samsung Electronics
Service Manual
System Overview
3-4
3) Driver Ass’y
Motor Specification : BLDC Motor DC24V
Driving Force Transmission by Gearing :
- Motor 1 : Developing/OPC/Feeding
- Motor 2 : Fixing/Duplex
4)Fuser
Unfused / Poor fusing temperature Poor Fusing Temperature : 170
Maximum fuser temperature : 197
Minimum fuser temperature : 180
Heater : E-coil type
Thermostat Type : Non-Contact Type THERMOSTAT
3.1.6 LSU
Optical Resolution : Real 600 dpi
Motor : Brushless DC motor PLL control
3.1.7 CRUM
Once toner sensor determines “toner empty” (section 4.7.1), this state is written to the CRUM and the Vendor ID location
is erased on the CRUM. Erasing the vendor ID will prevent an unauthorized (3rd party) refilled cartridge from being
identified as a genuine Samsung toner cartridge.
Toner status : Toner Status has Normal, Low, and Empty, Exhausted State.
Usage data saved in CRUM :
- Page count using this cartridge(Print Page Counter)
- Installed date of New cartridge(copier/Fax configuration)
- Whether cartridge has ever exhausted (used to stop printing)(Exhaust)
- Large or small capacity cartridge (used by Capacity)(Capacity)
Disabling of features when non-Samsung cartridge :
- No working CRUM, stops printing.
- Print cartridge for different product, stops printing. “Invalid Toner” will be displayed on LCD in above 2 cases.
3.1.8 Drum Cartridge
Drum Cartridge to have a fuse to enable resetting of Drum Page counter.
Low Drum Warning : Message displayed on LCD
Drum Warning after printing 18,000 images.
Out-of -Drum : Message displayed on LCD
Replace Drum after printing 20,000 images.
Or after additional 2000 images from
Drum Warning
Life(Service) Time : 20,000 images
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