Image forming apparatus and program thereof

摘要

An image forming apparatus includes a first detection unit configured to output a first detection signal upon detecting a recording medium; a second detection unit configured to output a second detection signal upon detecting the recording medium, which is conveyed from the first detection unit; a signal generation unit configured to generate a substitute signal for the first detection signal in a case where the first detection unit does not output the first detection signal; and a state determination unit configured to determine a state of the image forming apparatus based on the first and second detection signals. The state determination unit determines that the first detection unit is in a failure state upon receiving the second detection signal and the substitute signal, which is input instead of the first detection signal.

主权项

1. An image forming apparatus comprising:
a detector configured to,
output a first detection signal upon detecting a recording medium,output a second detection signal upon detecting the recording medium being conveyed to a registration roller; and a processor configured to
generate a substitute signal for the first detection signal when the detector does not output the first detection signal,determine a state of the image forming apparatus based on the first detection signal and the second detection signal,determine whether the first detection signal is output during or before a first time period elapses from a first reference time,determine whether the second detection signal is output during or before a second time period elapses from a second reference time, anddetermine that the detector is in a failure state upon receiving the second detection signal and the substitute signal, wherein the processor is configured to generate the substitute signal for the first detection signal when the detector does not output the first detection signal during or before the first time period elapses from the first reference time.