Epson PowerLite 7550C User Manual page 36

Connecting the projector's audio cable
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1 • Setting Up the Projector
4. Tighten the screws on both connectors.
5. Check the documentation for your laptop for instructions on
setting the display to appear on an external monitor (the
projector screen) only or on both the LCD screen and the
projector screen. If the projector's image is dim or not displayed
correctly, try setting up the laptop to display for external
monitor only.
If you want to use audio, your laptop must have an Audio Out jack
to connect the audio cable.
1. Connect one end of the audio cable that came with the projector
to the Audio In jack on the projector.
Audio In jack
audio cable