Check the serial number of your projector. If the serial number begins with either "XD9S" or "XD9T" and you are using a 100 - 120 V AC power source, the brightness of the projected image is limited to approximately 95% of the brightness compared to when using a 200 - 240 V AC power source.
If your serial number begins with "XAPY" or "XAP2" and you are projecting using a 100 - 120 V AC power source, the brightness of the projected image is limited to approximately 60% of the brightness compared to when using a 200 - 240 V AC power source. Additional limitations of using 100 – 120 V AC power include the use of only the Custom mode for the Light Source Mode setting. The Estimated Remains and Refresh Mode features are also not available.
Be sure to ground the power plug using a ground wire or 3-core power plug.