A method of phototext separation, which includes converting a document image into a plurality of source color planes, setting a source color consecutive point threshold, performing an intensitycolor operation for each of the source color planes, and assigning phototext types to the document image according to a connected length density threshold and a result of the intensitycolor operation. The hotsocket detection circuitry monitors signals on data pins and power supply voltages. Irrespective of a sheet size, the second jogger is moved toward the second alignment reference wall and first jogger by an alignment distance necessary to align the second-size sheet with a stapling process position, which allows the stapler to staple the sheets with at least one of two staple legs. When the indication of peak power exceeds the second threshold, a peak overdrive event can be detected.