Card reading assembly and self-service terminal equipped with the same as well as method for monitoring the same

A card reading assembly for a self-service terminal, comprising a housing into which a card is inserted to be read, comprising sensors and/or actuators connected to an evaluation device and comprising a plurality of piezo-electric transducers,

• wherein the plurality of piezo-electric transducers are arranged in or on the housing such that the integrity of the card reading assembly, in particular the housing, is testable, the evaluation device configured to control a first of the plurality of piezo-electric transducers to excite at least a portion of the card reading assembly to vibrate, a second of the plurality of piezo-electric transducers configured to sense vibration and generate an output signal in response to the vibration of the at least a portion of the card reading assembly, the output signal corresponding to a sensed frequency of the vibration, the evaluation device also configured to receive the output signal from the second of the plurality of piezo-electric transducers, the evaluation device also configured to compare the received output signal with at least one predetermined frequency, and the evaluation device also configured to issue a warning signal in response to a deviation between the frequency represented by the output signal and the at least one predetermined frequency, the warning signal indicating a lack of integrity of the card reading assembly.