单项选择题

A polygon mirror is part of which of the following assemblies？（）

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

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单项选择题

A customer has installed a new computer on their network. They can print to the printer but the option for duplex printing is not available. All other computers have the option. Which of the following is the cause of the problem？（）

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

When is it advisable to dump the waste toner from a technicians service vacuum？（）

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

单项选择题

How many CCDs are located in a single pass duplex ADF？（）

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