High voltage power supply without output voltage adjustment, method of adjusting output voltage of the high voltage power supply in image forming apparatus, and image forming apparatus using the method

An image forming apparatus comprising:

• a high-voltage output unit that is included in a high-voltage power supply (HVPS) and outputs a high voltage produced by the HVPS;
• a serial number that is attached to the HVPS and to which information about an offset voltage is added, wherein the offset voltage represents a difference between the high voltage output by the high-voltage output unit and a preset reference output voltage of the HVPS;
• a database that stores information associated with a serial number of the HVPS;
• and
• a high-voltage output control unit that reads the serial number attached to the HVPS to extract the information about the offset voltage, and corrects a high-voltage output control signal with reference to a result of searching the database to change the high voltage output by the high-voltage output unit.

A high-voltage power supply (HVPS) comprising:

• a high-voltage producing unit that produces a high voltage;
• a high-voltage output unit that outputs the high voltage;
• and
• a tag that stores information about an offset voltage and is attached to the HVPS, wherein the offset voltage represents a difference between the high voltage output by the high-voltage output unit and a preset reference output voltage of the HVPS.

A method of adjusting an output voltage of a high-voltage power supply (HVPS), the method comprising:

• manufacturing the HVPS and measuring an output voltage of the HVPS;
• recording information about an offset voltage in a tag attached to the HVPS, wherein the offset voltage represents a difference between the measured output voltage of the HVPS and a preset reference output voltage of the HVPS;
• extracting the information about the offset voltage by reading the tag attached to the HVPS when the HVPS is installed in an image forming apparatus;
• and
• changing the output voltage of the HVPS by correcting the high-voltage output control signal by using the information about the offset voltage, wherein the changing of the output voltage is performed by the image forming apparatus.

A method of adjusting an output voltage of a power supply, the method comprising:

• measuring an output voltage of the power supply;
• recording information about an offset voltage in a tag attached to the power supply, wherein the offset voltage represents a difference between the measured output voltage of the power supply and a preset reference output voltage of the power supply;
• extracting the information about the offset voltage by reading the tag attached to the power supply when the power supply is installed in an apparatus;
• and
• changing the output voltage of the power supply by correcting an output control signal by using the information about the offset voltage, wherein the changing of the output voltage is performed by the apparatus.

A method of adjusting an output of a part installable in an apparatus, the method comprising:

• measuring an output of the part;
• recording information about an offset in a tag attached to the part, wherein the offset represents a difference between the measured output of the part and a reference output of the part;
• extracting the recorded information when the part is installed in the apparatus;
• and
• changing the output of the part by the apparatus by correcting a control signal based on the extracted information.