Xerox 3117 - Phaser B/W Laser Printer, Руководство по обслуживанию

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Service Manual
System Overview
3-20
3.3 S/W Structure and Descriptions
The purpose of this document is to describe the design specification of the Engine Control F/W for the
Phaser 3117.
3.3.1 Introduction
This Engine Control Firmware is a program that controls LBP Engine of the Phaser 3117.
This firmware is executed every 10msec as an interrupt routine of the main system. At stand-by state, this firmware
monitors the enable print command from the main system. If the enable print command is detected, this firmware
controls the Engine Mechanism according to the printing process and paper feeding state. And with the Sleep
command or Wake-Up command, this firmware controls the Engine state.
3.3.2 Engine Control F/W Overview
Engine Control F/W is executed every 10msec by timer interrupt of main system. And it consists of 3 control
modules.
- Engine Main Control, Interface Control and Sensing & Unit Control Module.
Major operations of the Engine Control F/W are following.
- Control the Pick-Up, Feeding and Discharging of Paper
- Control the LSU
- Control the HVPS for the Developer Process
- Control the Temperature of Fixing unit
Controlling selection to here is added.
- Second Cassette Feeder(SCF) : N/A