Epson Powerlite 7550c Users Guide

Connecting to a Computer
23
The illustration below identifies all the interface ports on the back of 
the projector; you may want to refer to this as you connect your 
computer or other equipment to the projector.
Connecting to a PC Desktop Computer
 
This section describes how to connect the projector to your PC 
desktop with the projector’s video, audio, and mouse cables. (You 
must connect the video cable; the audio and mouse cables are 
optional.)
S-Video In
Audio Out Right Audio
RepeaterComputer In...

1    Setting Up the Projector             24
Connecting the projector’s video cable
Note: Computer configurations vary. See your computer manual for 
the location of the ports needed to connect your projector.
1. Turn off the projector and computer, if they’re on.
2. Connect either end of the projector’s video cable to the 
Computer In port.
3. Disconnect the computer’s monitor cable from the video port on 
the back of the computer.
4. Connect the other end of the projector’s video cable to the...

Connecting to a Computer
25
5. If you want to view the video on the computer monitor, connect 
the computer’s monitor cable to the projector’s Computer Out 
port. (This is especially useful when the projection screen is 
behind you.) 
6. Tighten the screws on all connectors.
Connecting the projector’s audio cable
1. If you will be using audio, connect one end of the audio cable 
that came with the projector to the Audio In jack on the 
projector.
2. Connect the other end of the audio cable to the audio...

1    Setting Up the Projector             26
Connecting the projector’s mouse cable
Connect the projector’s PS/2 mouse cable if you want to use the 
projector’s remote control as a mouse pointer for the computer.
Note: If you’ll be using the optional ELP Link III software, you need 
to connect the mouse cable included in the ELP Link III kit instead. 
See Chapter 4 for instructions. 
1. Disconnect the computer’s PS/2 mouse cable from the mouse 
port on the back of your computer and replace it with the...

Connecting to a Computer
27
Connecting to a PC Laptop Computer
This section describes how to connect the projector to your PC 
laptop with the projector’s video, audio, and mouse cables. (You 
must connect the video cable; the audio and mouse cables are 
optional.)
Connecting the projector’s video cable 
Note: Laptop configurations vary. See your computer manual for 
the location of ports needed to connect your projector. 
1. Turn off the projector and computer, if they’re on.
2. Connect either end of...

1    Setting Up the Projector             28
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.
Connecting the projector’s audio cable
If you want to use audio, your laptop must have an Audio...

Connecting to a Computer
29
2. Connect the other end of the audio cable to the audio out port on 
your laptop. 

1    Setting Up the Projector             30
Connecting the projector’s mouse cable
Connect the projector’s PS/2 mouse cable if you want to use the 
projector’s remote control as a mouse pointer for your computer.
Note: If you’ll be using the optional ELP Link III software, you need 
to connect the mouse cable included in the ELP Link III kit instead. 
See Chapter 4 for instructions.  
1. Connect the small end of the PS/2 mouse cable included with 
the projector to the laptop’s mouse port.
2. Connect...

Connecting to a Computer
31
Connecting to a Desktop Macintosh
This section describes how to connect the projector to your desktop 
Macintosh with the projector’s video, audio, and mouse cables. 
(You must connect the video cable; the audio and mouse cables are 
optional.) Make sure you also have ready the Macintosh desktop 
adapter and monitor adapter that came with the projector. (You’ll 
need the monitor adapter only if you’ll be displaying the image on 
your monitor screen as well.) 

1    Setting Up the Projector             32
Connecting the projector’s video cable 
Note: Macintosh computer configurations vary. See your computer 
manual for the location of the ports needed to connect your 
projector.
1. Turn off the projector and your Macintosh, if they’re on.
2. Connect either end of the projector’s video cable to the 
Computer In port.
Macintosh desktop 
adapter
projector video cable
computer’s monitor cable Macintosh 
monitor adapterComputer Out portComputer In port