Engine Section - Samsung SCX-6345N/XAA Service Manual

System Overview

3.3 Engine Section

It is used as recording device when copying/printing or Fax receiving and designed as detachable unit type with system.
It adopts Electro-photography system with using LSU when recording, and uses non-magnetic 1 component developing
system.
It consists of Frame unit, Feed unit, Transfer unit, Driving unit, Imaging, Cartridge, Fuser unit and High pressure member.
3.3.1 Engine Hardware Configurations
1) Main PBA
It comprises integrated single unit with Engine Board and Controller Board.
It manages Electro-photography system, which sends the Video Data of current image from Main Board to LSU and
conducts printing.
And also it consists of Motor (paper transmission & exit)Driving, Pre-transfer Lamp Driving, Current Driving, Fan Driving
Circuit.
The detection signal of Paper Feed Jam Sensor and Paper Empty Sensor is directly input into Main Board.
2) HVPS(High Voltage Power Supply)
HVPS Part outputs the generated high voltage for THV/MHV/BIAS/DETACH/FUSER BIAS by inputting 24V, and the
output high voltage is provided into OPC Cartridge and Transfer Roller.
3) SMPS(Switching Mode Power Supply)
SMPS supplies DC voltage to System.
It supplies electric power to Main Board/ADF Board1 by outputting +5V,+24V after 110V/220Vpower input.
4) CRU (Customer Replacement Unit)
It is consisted of Drum Cartridge and Toner Cartridge.
5) LSU (Laser Scanning Unit)
It scans high-convergency Laser Beam into rotating Polygon Mirror, and linearly scans through f- Lens with constant
speed. Then it forms the latent image by exposing the image data into OPC Drum.
6) Transfer Unit
TRANSFER Roller bears and carries the toner of OPC Drum into recording medium.
7) Fuser
Consisted of IH Heater, Heat Roller, Pressurizing Roller, Thermistor and Thermostat, it fixes toner into recording medium.
Service Manual
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Samsung Electronics