Major Assemblies And Functions; Main Board - Xerox 3450B - Phaser B/W Laser Printer Service Manual

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.
Face Down
Exit Sensor

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.
Theory of Operation
OPC
Main Board
Print Engine Controller
Stacker
Fuser
Paper
Path
Metering Blade
D/R
S/R
-650V
-500V
GND
Develop Block
Host Computer
System Controller
H.V.P.S
LSU
Developer
OPC
Registration
Sensor
/HSYNC
s3450-165
2-7