Malfunction Fan Control board or SMPS board.

Put the projector in Stand-By mode, remove the Light Source and the Cathode Fan assembly to access the Signal Backplane connections with the SMPS wires (reference 6 image). Then, measure on the Signal Backplane the +24V voltage on pin 9, 10, 11 or 12 of the connector with the black wires coming from the SMPS board. See image.

If the measured voltage is about 24V then replace the Cinema Control board. See service manual chapter "Replacement of the Cinema Controller". Otherwise replace the SMPS board. See service manual chapter "Switch Mode Power Supply (SMPS)".

Note: To remove the Light Source House see service manual chapter "Laser Phosphor Light Source". To remove the Lamp Anode Fan assembly see service manual chapter "Replacement of the Anode Fan".

Note: The projector must be in Stand-By mode otherwise no voltages are generated by the SMPS board.

Short circuit or bad connection.

1. Check the Signal Backplane for bad connections. Ensure that all wires are well connected (reference 6 image).

   (Note that the +24V supply is generated on the SMPS board and enters the Cinema Control board via the Signal Backplane)

2. Check the wiring (reference 1 image) of the Anode Fan for short circuits.

3. Check the wiring (reference 3 image) of the Cathode Fan for short circuits.

Note: To access the SMPS connections with the Signal Backplane the Lamp House and Lamp Cathode Fan assembly (reference 1 image) has to be removed from the projector.