Xerox WorkCentre 385, Service Manual

Page: 138 / 184

WorkCentre 385
Engine Configuration
12/98
7 - 4
Engine Configuration
Video Controller PBA
Video Controller PBA receives image data from
the host computer and converts it to a
bitmap(binary) image, which is sent to the Engine
Controller PBA.
Engine Controller PBA
Engine Controller PBA receives the video data
from the Controller PBA, and sends the video
image to LSU and controls the electrophotography
process for printing.
HVPS PBA
HVPS PBA generates THV/MHV/BIAS high
voltages for the Developer unit. The LSU and
Cover Open Sensor interface signals connect via
the Engine Controller PBA.
Joint PBA
Joint PBA connects with the Engine Controller
PBA and contains the Main Motor, Clutch, Pre-
Transfer Lamp driver, New Developer, Paper
Empty and Paper Exit Sensing circuits.
Laser Printer Cartridge
Laser Printer Cartridge creates the image via the
electrophotography process. The Charge Roller,
OPC Drum, Developer Roller, Supply Roller and
Toner constitute the Laser Printer Cartridge.
LSU (Laser Scanner Unit)
Under control of the Engine, controls the laser
beam and the OPC Drum exposure and rotation.
The OPC Drum is synchronized and rotating with
the same speed as the paper. When laser beam
reaches the position of the Scanning Mirror, it
creates a line. Synchronization Signal(HSYNC),
which is sent to the Engine PBA which transfers
image data to LSU and synchronizes the vertical
scanning line with the printed page.
Transfer
It contains the PTL (Pre-transfer Lamp) and the
Transfer Roller. The PTL exposes the light to the
OPC drum and lowers the OPC drum surface
potential, to improve transfer efficiency. The
Transfer Roller transfers Toner on the OPC Drum
to the paper.
Fuser
It contains the Heat Lamp, Heat Roller, Pressure
Roller, Thermistor and thermostat, and causes the
Toner to adhere to the paper.
www.printcopy.info
www.printcopy.info