Xerox WorkCentre PE120 Service Manual page 35

Effective pixel: 5,400 pixel *3
Voltage: 24 V and 5 V
Pre-heating time: Maximum 30 seconds (70% of light output reached)
The life span of a lamp: 30,000 hours (25
Image Processor Specification
Operating frequency: 66MHz
Image sensor interface: 200/300/600 dpi CIS or CCD
Line time: Copy, FAX, Binary (Lineart, Halftone) PC Scan: 1.5ms/Line Color PC Scan (Grey, 256 Color,
True Color): 4.5ms/Line
A/D conversion: 10 bit conversion
Note
For more information about scan settings, review the Scanning sections of the WorkCentre PE120 User
Guide and the Multifunction Basics Prerequisite Training.
3) The Print Engine
1. Engine Frame
2.
Paper Feed
The paper feed system consists of a 250-sheet main paper tray, a bypass tray (MP), pickup rollers, friction pads, and feed
rollers. The rollers and sensors in the paper feed path control paper registration and guide the paper through the image
transfer, image development, image fusing and exit assemblies. The paper path has an anti-static connection to ground to
eliminate problems due to static charge on the paper.
3. Main drive mechanism
The main drive is a bi-polar, two phase motor. It drives the drum, paper pick, and paper feed rollers using a gear train
mechanism.
4.
Image development unit
Using a Laser Scanner Unit (LSU), this portion of the mechanism creates the image on the OPC drum (part of the
integrated toner cartridge).
5.
Image transfer unit
This unit uses the high voltages supplied by the HVPS to move the image from the OPC drum onto the paper.
6.
Image fusing unit
This unit permanently fixes the toner image onto the paper. This is achieved using a temperature controlled heating unit
(the fuser).
7. Electronic boards include:
a.
The Main control board, consisting of:
Main processor asic (166 MHz SPGPm)
Memory (Flash ROM containing the control program and DRAM for working memory)
Engine interface parts (motor control, fuser control, HVPS control, and sensors)
PC Interface (USB , Parallel, Network)
Bus, DMA and I/O handling
b. PC Interface
o
C)
Service Manual
Product Summary
4-7