A cleaning device includes a cleaning unit configured to perform cleaning while in contact with a light transmission member, the cleaning unit being movable with respect to the transmission member in a first direction and a second direction differing in orientation. The shaft is threadedly connected to the blade assembly. The flap-like tear open part is provided with a reinforcement having at least one flexible layer. For finite contents, receiving completion and decoding completion of the received data are simultaneous. In a second mode, the method includes generating a second strobe signal by operating the multiplexer with the clock signal to select between the first input signal and the second input signal, the first input signal corresponding to the control signal inverted and delayed and the second input signal having a static second signal level.