Samsung SCX-4200 Series, Руководство по обслуживанию

Страница: 36 / 150

System Overview
Samsung Electronics
Service Manual
3-21
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.