The supply voltage for the lens motors is below its minimum.

Put the projector in Stand-By mode, remove the Lamp House and the Lamp 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.

(The supply voltage for the lens motors is derived form the +24V on the Cinema Controller board. The +24V supply is generated on the SMPS board and enters the Cinema Control board via the Signal Backplane. )

If the measured voltage is about 24V then:

1. reseat the Cinema Control board. See "Replacement of the Cinema Controller".

2. if the problem remains, replace the Cinema Controller board.

If the measured voltage is not OK then:

1. Check the Signal Backplane for bad connections. Ensure that all wires are well connected.

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

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

4. replace the SMPS board. See service manual chapter "Switch Mode Power Supply (SMPS)".

Note: To remove the Lamp House see service manual chapter "Removal of the Lamp House". To remove the Lamp Anode Fan assembly see service manual chapter "Replacement of the Lamp Cathode Fan".

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