Samsung SL–C1860FW - Engine F;W Control Algorithm

2.Productspecicationanddescription
2.2.6.EngineF/WControlAlgorithm
2.2.6.1.Feeding
Iffeedingfromacassette,thedriveofthepickuprolleriscontrolledbycontrollingthesolenoid.Theon/offofthe
solenoidiscontrolledbycontrollingthegeneraloutputportortheexternaloutputport.Whilepapermoves,occurrence
ofJamisjudgedasbelow.
ItemDescription
JaminTray1•Afterpickingup,papercannotbeenteredbecausetopaperisnotfed.
•Afterpickingup,paperenteredbutitcannotreachtothefeedsensorinpredeterminedperiodof
time.duetoslip,etc.
•Afterpickingup,ifthefeedsensorisnoton,re-pickup.Afterre-pickingup,ifthefeedsensoris
notonaftercertaintime,itisJAM0.
•Eventhoughthepaperreachestothefeedsensor,thefeedsensordoesn’tbeON.
Jaminside
machine
•Aftertheleadingedgeofthepaperpassesthefeedsensor,thetrailingedgeofthepapercannotpass
thefeedsensorafterpredeterminedperiodoftime.
•Aftertheleadingedgeofthepaperpassesthefeedsensor,thepapercannotreachtheexitsensor
afterpredeterminedperiodoftime.
*Thepaperexistsbetweenthefeedsensorandtheexitsensor.
JaminExit
area
Afterthetrailingedgeofthepaperpassesthefeedsensor,thepapercannotpasstheexitsensorpredetermined
periodoftime.
2.2.6.2.Transfer
Thechargingvoltage,developingvoltageandthetransfervoltagearecontrolledbyPWM(PulseWidthModulation).The
eachoutputvoltageischangeableduetothePWMduty.Thetransfervoltageadmittedwhenthepaperpassesthetransfer
rollerisdecidedbyenvironmentconditions.Theresistancevalueofthetransferrollerischangedduetothesurrounding
environmentortheenvironmentoftheset,andthevoltagevalue,whichchangesduetotheenvironments,ischanged
throughADconverter.Thevoltagevalueforimpressingtothetransferrollerisdecidedbythechangedvalue.
2.2.6.3.Fusing
Thetemperaturechangeoftheheatroller’ssurfaceischangedtotheresistancevaluethroughtheuseofathermistor.
TheMainBoardusestheresistancevalueoftheThermistorandconvertsittoavoltagevaluethroughtheuseofanAD
converter,thetemperatureisdecidedbasedonthevoltagevalueread.TheACpoweriscontrolledbycomparingthetarget
temperaturetothevaluefromthethermistor.Ifthevaluefromthethermistorisoutofcontrollingrangewhilecontrollingthe
fusing,theerrorstatedinthebelowtableoccurs.
2-34Copyright©1995-2013SAMSUNG.Allrightsreserved.