Image forming apparatus, power supplying method, and recording medium

A power supplying method for an image forming apparatus including

• a reading unit configured to read an original document and generate image data,
• a power source unit configured to supply a power to the reading unit,
• a power source switching signal output unit configured to output a switching signal for switching between supply and shut-off of the power for at least one of an image pickup element included in the reading unit and an image processing unit included in the reading unit, the power supplying method comprising:
• measuring a power stopping time while the power to the reading unit is shut off;
• determining whether to carry out only a first initial setting for setting a first setup value in the reading unit when the measured power stopping time is less than a predetermined time and whether to carry out both the first initial setting and a second initial setting for setting a second setup value in the reading unit when the measured power stopping time is the predetermined time or more;
• and
• carrying out only the first initial setting or both the first initial setting and the second initial setting upon the determination by the judging.

A non-transitory recording medium saving programs representing a sequence of instructions, the programs which when executed by a computer included in an image forming apparatus including

• the computer, a reading unit configured to read an original document and generate image data, a power source unit configured to supply a power to the reading unit, and a power source switching signal output unit configured to output a switching signal for switching between supply and shut-off of the power for at least one of an image pickup element included in the reading unit and an image processing unit included in the reading unit,
• the instructions cause the computer to functions as:
• a measuring unit configured measure a power stopping time while the power to the reading unit is shut off;
• a judging unit configured to determine to carry out only a first initial setting for setting a first setup value in the reading unit when the measured power stopping time is less than a predetermined time and carry out both the first initial setting and a second initial setting for setting a second setup value in the reading unit when the measured power stopping time is the predetermined time or more;
• and
• an initial setting unit configured to carry out only the first initial setting or both the first initial setting and the second initial setting upon the determination by the judging unit.