Xerox 3450B - Phaser B/W Laser Printer, Руководство по обслуживанию, Страница: 40 / 180

Theory of Operation 2-7
Major Assemblies and Functions
The Phaser 3450 Laser Printer contains several subsystems. Each subsystem contains
Service Parts identified in the parts list in Chapter 9 of this manual. For information
on repairing or replacing sub-assemblies and Service Parts, refer to the Removal and
Replacement Procedures in Chapter 8 of this manual. Some components may not be
replaceable except as part of a larger component.
Main Board
The Main Board combines the Image Processor and Engine Control functions. It
contains a 266 MHz, 32 bit RISC processor and comes with a standard memory
capacity of 32 Mbytes. The board provides one expansion slot that allows available
memory to be expanded up to 160 Mbytes by adding an additional 32 Mbyte, 64
Mbyte, or 128 Mbyte DIMM. An expansion slot is available for an optional 8 Mbyte
flash memory DIMM for fonts, forms, and macros.
s3450-165
H.V.P.S
LSU
/HSYNC
Host Computer
System Controller
Main Board
Print Engine Controller
Face Down
Stacker
Fuser
Paper
Path
Registration
Sensor
Exit Sensor
Developer
OPC
Metering Blade
-500V
-650V
Develop Block
OPC
D/R
S/R
GND