Power Board

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The power board is located beneath the CIC heat sink and on the left next to the CIC main connector. It contains both the audio output stages for the speakers of the stereo system as well as the power supply unit for the CIC.

The heat sinks and CIC fan cool the system by dissipating the heat from the power supply unit and amplifier.

The unit interfaces with the vehicle's electrical system (power supply, MOST link, etc.) through the main connector.

CIC MAIN BOARD AND HEAT SINK EXPLANATION CHART

Index	Explanation
1	Heat sink
2	Power board
3	Main connector of the CIC

Fig 1: Identifying CIC Main Board And Heat Sink Location

Courtesy of BMW OF NORTH AMERICA, INC.