Patent ID: 8531739

Claim:
A reading apparatus comprising: a sensor configured to read an original document image; a signal generation unit configured to generate a timing signal for driving the sensor; a sending unit and a receiving unit, wherein the sending unit is configured to send data output from the sensor to the receiving unit via a cable, and wherein the receiving unit is configured to receive the data sent from the sending unit via the cable; an image processing unit configured to perform an image processing on the data received by the receiving unit; a Phase Locked Loop unit provided in at least one of the signal generation unit, the sending unit, and the receiving unit; a detecting unit configured to detect a state of the Phase Locked Loop unit; and a control unit configured to control the sensor to suspend a reading operation of the sensor responsive to a detection by the detecting unit that the state of the Phase Locked Loop unit changes from a locked state to an unlocked state while the sensor reads the original document image.