Samsung SCX-340x Series - Engine F;W Contol Algorithm; Feeding; Transfer

2.Productspecicationanddescription
2.2.6.EngineF/WContolAlgorithm
2.2.6.1.Feeding
Iffeedingfromatray,thedriveofthepickuprolleriscontrolledbycontrollingtheclutch.Theon/offoftheclutchis
controlledbycontrollingthegeneraloutputportortheexternaloutputport.Whilepapermoves,occurrenceofJam
isjudgedasbelow.
ItemDescription
JAM0
or
PaperEmpty
•Afterpickingup,paperdoesnotreachtheFeedSensorwithinapredeterminedtime.
•Afterpickingup,ifthefeedsensorisnoton,re-pickupwillbeinitiated.Afterre-pickingup,ifthe
feedsensorisnotonaftercertaintime,itisJAM0
•Eventhoughthepaperreachestothefeedsensor,thefeedsensordoesnotdetecttheleadedgeof
thepaper.
JAM1•Aftertheleadingedgeofthepaperpassesthefeedsensor,thetrailingedgeofthepaperdoesnotclear
thesensorthefeedsensorafterpredeterminedperiodoftime.
2.2.6.2.Transfer
Thechargingvoltage,developingvoltageandthetransfervoltagearecontrolledbyPWM(PulseWidthModulation).The
eachoutputvoltageischangeableduetothePWMduty.Thetransfervoltageadmittedwhenthepaperpassesthetransfer
rollerisdecidedbyenvironmentconditions.Theresistancevalueofthetransferrollerischangedduetothesurrounding
environmentortheenvironmentoftheset,andthevoltagevalue,whichchangesduetotheenvironment,ischangedthrough
theADconverter.Thevoltagevalueforimpressingtothetransferrollerisdecidedbythechangedvalue.
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