单项选择题

Which of the following items can be used as a discharge lamp？（）

A.Halogen lamp
B.Light Emitting Diodes （LED）
C.Fuser lamp
D.Cleaning roller

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单项选择题

Which of the following failed components would be responsible for the fuser unit not heating properly？（）

A.Halogen lamps
B.Ball bearing
C.Hot roller
D.Pressure roller

单项选择题

Which of the following devices can route electrical signals only when activated by an external control signal？（）

A.Solenoid
B.Relay
C.Clutch
D.Capacitor

单项选择题

Which of the following is the FIRST step a technician should take when troubleshooting a device issue？（）

A.Gather information from the customer.
B.Isolate the problem on the device.
C.Read the service documentation for possible causes.
D.Check the parts life counters.