During the photoconductor preparation step， residual charge can be removed by which of the following？（）

单项选择题InwhichofthefollowingsectionsofanMFPwouldatechnicianfindaXenonLamp？（）

A.The paper feed section
B.The fuser section
C.The scanner section
D.The transfer section

单项选择题Apolygonmirrorispartofwhichofthefollowingassemblies？（）

A.Laser unit
B.Developer unit
C.Charge assembly
D.Fuser assembly

单项选择题Acustomerhasinstalledanewcomputerontheirnetwork.Theycanprinttotheprinterbuttheoptionforduplexprintingisnotavailable.Allothercomputershavetheoption.Whichofthefollowingisthecauseoftheproblem？（）

A.The new computer is printing to the wrong IP address.
B.The new computer is using the wrong protocol.
C.The driver port is not setup correctly.
D.The option has not been selected on the driver.

单项选择题Whenisitadvisabletodumpthewastetonerfromatechniciansservicevacuum？（）

A.When it is full.
B.It is not recommended.
C.Before performing preventative maintenance.
D.After each call.

单项选择题HowmanyCCDsarelocatedinasinglepassduplexADF？（）

A.One
B.2
C.3
D.4