The wire unit of the temperature sensor at the front of theDMD is mistakenly switched with one of the wire units of the othertemperature sensors of the Light Processor Unit.

Check if all wire units of the temperature sensors are pluggedinto their respective sockets on the Formatting Interface Board. See .

The wire units of the Peltier elements (TEC's), mounted on thecommon cooling block of the heat pipes, are mistakenly switched.

Check if all wire units of the Peltier elements are pluggedinto their respective sockets on the Formatting Interface Board. See .

No thermal contact between heat pipes and common cooling blockdue to loose screws.

Check if the four screws, which attach the heat pipes of theinvolved channel to the common cooling block, are fastened. See .

Malfunction Peltier element (TEC) between heat pipes and commoncooling block. Use the “diode test” of a multi-meterto check out the Peltier. Polarity does not matter. The Peltier isOK in case the measured value is higher then 0,01 volt.

Remove the light processor from its compartment and replacethe malfunction Peltier. If problem persist, contact Barco for furtherinstructions.