Canon LV-7370 User Manual page 24

. Installaton and Connectons
NOTE: Use an audio cable without a built-in resistor. Using an audio cable with a built-in resistor turns down the sound.
NOTE: An image may not be displayed correctly when a Video or S-Video source is played back via a commercially available
scan converter.
This is because the projector will process a video signal as a computer signal at the default setting. In that case, do the following.
* When an image is displayed with the lower and upper black portion of the screen or a dark image is not displayed correctly:
Project an image to fill the screen and then press the AUTO PC button on the remote control or the projector cabinet.