Xerox Phaser 3300, Руководство по обслуживанию

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2-2 Phaser 3300MFP Service Manual
Theory of Operation
Phaser 3300MFP Operational Overview
The Phaser 3300MFP is a monochrome multi-function product that uses
Laser Scanner Unit (LSU) with an electrophotographic process in the print
engine, a moving CCD in the automatic feed scanner, and a built-in fax-
modem for fax functionality. The printer system consists of one print cartridge
which creates toner image.
Summary
The Phaser 3300MFP is roughly made up of: Main Controller, Control Panel,
Scanner, Line Interface, and Power subsystems. Each subsystem is a
separate module that focuses on common and standard designs of different
kind products. The Main controller consists of 1 CPU and 1 Board. The
Scanner consists of the ADF and Platen, and is connected to the Main
Controller by a harness. The Line Interface Unit is designed to apply TBR21
standard (Domestic, Europe, etc.)
1. CPU: ARM920T, which is exclusive controller to execute Printer & FAX
Function and to execute operation block by flash memory within system
program, and to control whole system.
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Main function block
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Completely Integrated System for Embedded Applications
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PVC — Dual/Single Beam, LVDS Pad (VDO, HSYNC), Support A3
1200 dpi, multi-pass color.
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HPVC — Dual/Single Beam, LVDS Pad (VDO, HSYNC), Support A4
600 dpi, multi-pass color.
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DMA — 6 Channels (if not use CIP4e, 4ch is available for external
DMA.
If CIP4E used (a4 DMA channel use), 2ch available for external DMA)
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Operation Frequency: CPU Core -> over 300 MHz, System Bus ->
100 MHz
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Operation Voltage: Core Voltage -> 1.2 V, I/O Pad Voltage -> 3.3 V,
RTC Voltage -> 3 V
2. Flash Memory: Record System Program, and download System Program
by PC INTERFACE. FAX for Journal List, and Memory for One Touch Dial,
Speed Dial List.
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Size: 32 Mbyte (NAND Flash)
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Random Access Time: 10 us (Max)
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Serial Page Access Time: 50 ns (Min)
3. SDRAM: is used as Swath Buffer in Printing, Scan Buffer in Scanning,
ECM Buffer in FAX receiving, and System Working Memory Area.
Size: 64 Mbyte (Basic), 96 (64 + 32) to 320 (64 + 256) Mbyte (Duplex)
20 MB: System Working Memory Area and Scan Buffer
6 MB: FAX Memory Receive Area
30 MB: Printing System Working Memory Area
Max Frequency: 166 MHz
Store Fax Receive Memory Data by using Battery