Damaged wire insulation of the temperature sensor which measures the temperature at the Light Pipe entrance. When disconnecting the wire of the temperature sensor from its socket (reference 1 image) or from the Signal Backplane (reference 2 image) the error code is changed to “light pipe - temperature sensor open”.

1. Repair the insulation of the of the temperature sensor which measures the temperature of Light Pipe entrance (reference 3 image, or in case a 3D color wheel is installed: reference 4 image).

2. If not repairable, replace the temperature sensor and wiring.

Defect temperature sensor (reference 18 image) which measures the heat sink temperature of the red channel. When disconnecting the wire unit of the temperature sensor from the Signal Backplane (reference 8 image the error code is changed to “light pipe - temperature sensor open”.

Replace the temperature sensor which measures the temperature of Light Pipe entrance (reference 3 image, or in case a 3D color wheel is installed: reference 4 image).