In addition to the standard ITB heater, a new anti-condensation heater [1] has been added next to the paper transfer bias roller [2] inside the ITB unit. The standard heater and this new heater are pre-installed at the factory. Connection of these heaters is optional. The connection is done at the AC control board [3] on the back of the machine. The heaters share a single harness and connector plug. The harness should be connected if SC453 (PTR Bias Roller Error) occurs frequently.