Xerox 3450B Service Manual - Page 40

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