System Overview

3.3.2.4 Engine Unit Control Module

Engine Unit Control Module consists of 4 sub-functions. The first function is a fixing unit control function. At this func- tion, it controls the temperature of a fixing unit for regulating temperature of the unit within a fixed range that is set following paper type and number of printout. The second function is a fan control function that controls operation of fan unit. And the third function is a sensor status management function. It gets the present status of each sensor and sets the status of each sensor. Finally there is a Unit and Device control function. In this function, it controls the devices and units for example: Motor, Clutch, and so on.

3.3.2.5 Paper Size

Eiger does not have a paper size sensor. So the information of the paper size is basically received from the main system. But the engine measures the paper size with the counter value based on the time of the feed sensor on-off when the paper is fed. We obtain the interval distance between paper and paper in the information from the main system and the measured interval distance. Comparing two interval distances, we choose the paper size with which the paper has a larger interval distance. The default value of the paper size is a legal.

3.3.2.6 Paper Type

The information of paper type is sent by the main system. The engine considers following paper types.

Plain Paper

OHP

Envelope

Card Stock

 

 

Label

Thin

 

 

Bond

Thick

 

 

Colored Paper

Preprinted

 

 

It controls a fuser temperature and a pick-up time according to above paper type. Each control depends on its mechanism.

Normally, papers with hard thickness are controlled by maintained a high temperature. But a paper like OHP is con- trolled at the lower temperature.

Samsung Electronics

Service Manual 3-21

Page 37
Image 37
Samsung SCX-4200 manual Engine Unit Control Module, Paper Size, Paper Type