Xerox 3210 - workcentre b/w laser, Руководство по обслуживанию

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2-20 WorkCentre 3210/3220 Multifunction Printer Service Manual
Theory of Operation
Controller Part
■
Performs electro-photography
■
Memory control (DDR2 SDRAM, NOR FLASH, Serial FLASH, EEPROM)
■
Handles signal between each driver and PC interface
■
Clock generation
Engine Part
■
Motor Control (BDLC, Stepping)
■
ADF Motor Interface (ADF reserved)
■
LSU (2 beam LVDS Type) control
■
Fuser control (On/Off)
■
I/O signal handling (Sensor/Clutch signal)
■
OPE/ CIS / MODEM / SCF control
■
CRUM control
■
Fan control
Asic (CHRUS3)
Description Specifications
Package
■
412 PBGA (Total pad number: 412 [each])
Voltage
■
Core Voltage: 1.0 V
■
I/O Pad Voltage: 3.3 V
CPU Core
■
ARM926EJS (16KB I-cache, 16 KB D-cache)
Operating Frequency
■
400 MHz
DDRC
■
DDR 1, 2 Combo
■
32 Bits Data Width (internal), 16 Bits Data Width
(external)
■
133 MHz DRAM interface
■
16 to 128 MB Array (up to 512 MB total)
■
Supports 4 AHB Slave Ports for individual memory
access
■
Supports 4 bank DDR1 SDRAM and 4 & 8 bank DDR2
SDRAM
■
Supports up to 4 DRAM ranks (chip select output)
ROMC
■
2 channel NOR Flash Controller
IOC
■
Supports 4 channel external I/O device, 2 channel DMA
I/O
DMAC
■
Contains 3 channels
HPVC
■
Supports 32 bits AHB Master I/F
■
A4 2400 dpi, A3 1200 dpi addressable
■
Supports 200, 300, 400, 600 dpi
■
Supports 4 channels single/dual beam