Which of the following items is used in conjunction with a sensor to provide a return signal to determine exact amounts of movement?

The customer reports that their MFP jams from one paper source, but works properly from the others. How can the technician begin to resolve the issue?

A customer states that when they try to scan a particular type of invoice on their color laser MFD flatbed scanner, it always comes out with a complete yellow background. Any other text or image document is ok. Which of the following is the cause of this issue?

Which of the following directs the laser beam to the photoconductor?

While onsite a technician discovers the customer is in the process of evaluating a printer from a competitor. Which of the following should be done?