Image recording apparatus and power shutoff process method for use therein

A power shutoff method for shutting off power supply to a nozzle array drive unit of an image recording apparatus, wherein the image recording apparatus comprises (i) at least one recording unit that includes a nozzle array constituted by a plurality of nozzles and the nozzle array drive unit for driving the nozzle array, (ii) a conveyance mechanism for supporting and conveying a recording medium, which is conveyed from an upstream area of a conveyance path and on which a recording process is performed by jetting ink from the plurality of nozzles, and (iii) a recovery mechanism comprising a recovery unit for performing a recovery process for recovering from clogging or contamination of the ink in the nozzle array, the method comprising:

• detecting an abnormality in the supporting and conveying of the recording medium performed by the conveyance mechanism;
• judging whether or not an abnormality in the supporting and conveying of the recording medium that is performed by the conveyance mechanism has been detected in the recording process and whether or not the recovery process is being performed;
• shutting off the power supply to only the nozzle array drive unit if it is judged that an abnormality in the supporting and conveying of the recording medium that is performed by the conveying mechanism has been detected;
• and
• judging whether or not the recovery unit is to make contact with the nozzle array during recovery of the nozzle array in the recovery process if it is judged that the recovery process has started, and shutting off the power supply to only the nozzle array drive unit if it is judged that the recovery unit is to make contact with the nozzle array,
• wherein the ink has conductivity.