The ITB unit is provided with two heaters The original heater [A] near the transfer roller remains at the same location. A new heater [B] has been added near the paper transfer bias roller.
These heaters share one thermostat. Neither heater is connected to the AC control board before the machine leaves the factory. The heaters share a common connector plug which should be connected to the AC control board if problems occur.
- White spots in prints indicate that condensation has formed in the machine, and in this case the ITB heaters should be connected.
- For example, this can occur when the machine is turned on in the morning after it has remained off during the night in a cold environment.
- The heaters consume about 18W after they are connected.
After the heaters are connected at the back of the machine:
- The heaters switch ON and heat the ITB when machine power is off, or when the machine is in low power mode, to prevent condensation from forming around the ITB unit.
- The heaters switch OFF while the main power switch is on.
The thermostat monitors the temperature inside the ITB unit to prevent the unit from overheating.
- If the heaters are OFF and machine temperature falls to 22oC±5oC, the ITB heaters will switch ON.
- If the heaters are ON and machine temperature rises to 32oC±5oC, the heaters will switch OFF.
- The thermostat performs no function when the heaters are not connected.