Epson 100" EpiqVision Ultra LS500 4000-Lumen Pixel-Shift 4K UHD 3LCD Laser Projector TV System with 100" Screen (White Projector) - Manual (Page 18)

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5 Exhaust vent
6 Remote receiver
Parent topic: Projector Part Locations
Projector Parts - Connectors
Rear
1 LAN port
2 HDMI1 port
3 HDMI2 (ARC) port
4 Service port
5 USB-A port
6 RS-232C port
7 Audio Out port
8 Cable holder (zip tie)