Image forming apparatus undergoing maintenance work

An image forming apparatus that can operate in a normal mode in which operation is controlled based on a plurality of setting values, wherein

• the plurality of setting values contains an operation control user setting value set by an administrator user having administrator authority and is stored in a memory part of the image forming apparatus;
• the image forming apparatus comprises a control part comprising a maintenance work processing part that causes the image forming apparatus to operate based on a selected mode and transition between modes of operation, wherein the modes of operation include the normal mode, a maintenance mode, and an approval waiting mode;
• the normal mode makes the image forming apparatus available to a general user;
• the maintenance mode allows a worker to perform a maintenance work on the image forming apparatus, wherein the maintenance work can independently include changing the operation control user setting value and replacing the memory part;
• the approval waiting mode:
• causes the image forming apparatus to wait for an administrator user having administrator authority to approve or reject the change of the operation control user setting value;
• and
• prevents a general user having no administrator authority from using the image forming apparatus until the approval or the rejection is received;
• when a maintenance worker is logged into the image forming apparatus, the control part backs up and stores the operation control user setting value in the memory part when the image forming apparatus transitions to the maintenance mode, and then when the maintenance work is completed, the control part determines whether the operation control user setting value was changed during the maintenance work;
• when the control part determines that the operation control user setting value was changed during the maintenance work, the image forming apparatus transitions to the approval waiting mode;
• when an administrator user having administrator authority is logged into the image forming apparatus during the approval waiting mode, an approval screen displays the details of the change including the identity of the operation control user setting value before the change and the identity of operation control user setting value after the change, and displays a prompt to accept or reject the change;
• when a general user is logged into the image forming apparatus during the approval waiting mode, a screen is displayed indicating that the image forming device is waiting for approval or rejection of the change from an administrator user having administrator authority;
• when the control part determines that a setting value other than the operation control user setting value was changed during the maintenance work and the operation control user setting value was not changed during the maintenance work, the image forming apparatus transitions to the normal mode;
• and
• when the maintenance work comprises replacing the memory part, the control part backs up and stores the operation control user setting value in a memory other than the memory part before the memory part is replaced and then, after the memory part is replaced, copies the operation control user setting value stored in said other memory to the memory part.