IMG 1010 - Power and Fan Control

Power Control:

The IMG 1010 power ramp-up is initiated only when the tray (main board) is fully seated into the docking station. This is done when the main board receives a fully seated signal from the docking station I/O board. This ensures that power on the main board does not come on until the system is properly seated.

All board voltages are then monitored and if any voltage falls out of tolerance on the low-side, a power down of all voltages will occur. In the case where a fault is detected by the CPU and main board shutdown is necessary, a forced shutdown will be initiated. A restart will not be initiated until all voltages are within tolerance.

Fan Control:

The IMG 1010 uses four fans for cooling. The fans, located on the front panel, draw air into the unit to cool the main board and I/O board. The air exhausts out vent holes at the rear sides of the docking station.

The fans connect directly to the main board and are individually fused and controlled by a fan controller on the main board. The main board also provides six temperature sensors that monitor ambient temperature at strategic locations on the board. When the fan controller detects an over temperature, the fans will increase speed to full on. For example:

• If one of the fans fail, the remaining fans will increase speed to full on to supply the required cooling.

• If any of the six temperature sensors detect an over temperature condition, the fans will increase speed to full on to supply the required cooling.