4.Troubleshooting
►ErrorCode
U3–4210
►Errormessage
Topdoorofscannerisopen
►Symptom
RADFcover-openisopenedor
►Troubleshootingmethod
1)Checkifthecover-openisclosedcorrectly.
2)Checkthecover-opensensor.
a)Remove3screws.
b)OpentheCover-Open.Andthen,releasethestackerbypushingbothsidestothedirectionofarrow.
c)RemovetheRADFrearcover.
d)Checktheribofthecover-openandsensor.
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