Driving apparatus with power disconnecting part, image forming apparatus having the same, and method of driving the image forming apparatus

An image forming apparatus comprising:

• an image forming unit having at least one photoconductor for forming a toner image;
• a image transfer belt unit having an image transfer belt for transferring the toner image formed on the photoconductor to a recording medium;
• an image fixing unit for fixing the toner image transferred to the recording medium;
• and
• a driving unit for driving each of the units, wherein the driving unit comprises:
• a driving motor;
• a belt unit driving part having a belt driving gear connected to the driving motor to drive the image transfer belt;
• an image fixing unit driving part having an image fixing gear for driving an image fixing roller for fixing a toner image onto a recording medium;
• a power disconnecting part for transmitting the power of the driving motor of the belt unit driving part to the image fixing unit driving part and for disconnecting the power transmission of the driving motor from the image fixing unit driving part;
• and
• a power disconnection actuating part for actuating the power disconnecting part.

A method of driving an image forming apparatus comprising steps of:

• driving a driving motor to form a toner image on a recording medium;
• detecting a jam of the recording medium while the toner image is being formed on the recording medium;
• disconnecting the transmission of the power of the driving motor of a belt unit driving part to an image fixing unit driving part;
• cleaning the toner image formed on an image transfer belt of a belt unit;
• and
• stopping the driving motor and pausing an operation of the apparatus.