Epson Powerlite 7250 Users Guide

Connecting to a Computer
33
Connecting the Audio Cable
1. If you will be using audio, connect one end of the audio cable to 
the Audio 1 jack on the projector. (Use the Audio 2 jack if you 
are connecting a second computer.)   
2. Connect the other end of the audio cable to your laptop. 
Note: PC audio cable jack locations vary. See your computer manual 
for the location of the audio jack needed to connect your projector.
audio cable
Audio 1 jack 

1    Setting Up the Projector
 34
Connecting to a Desktop Macintosh 
To connect the projector to your desktop Macintosh, you need to:
❐Connect the projector video cable and computer monitor cable
❐Connect the mouse and/or serial cable (if you want to use the 
remote control as a mouse or use the ELP Link IV software)
❐Connect the audio cable (if you’ll be projecting with audio)
Follow the steps in each section for the cables you need to connect. 
Before beginning, turn off the projector and computer if...

Connecting to a Computer
35
Connecting the Video and Monitor Cables
First connect the video and monitor cables. Refer to this illustration as 
you follow the steps below. 
Mac
Computer 1 port
Computer Out port
Macintosh 
desktop adapter
Macintosh 
monitor adapterMacintosh 
monitor cable
projector 
video cable 

1    Setting Up the Projector
 36
1. Connect one end of the projector video cable to the projector’s 
Computer 1 port. (Use the Computer 2 port if you are 
connecting a second computer.)
2. Remove the small cover on the Macintosh desktop adapter (as 
shown below) and set its DIP switches in accordance with the 
resolution you want to use, such as 16-inch mode. See your 
Macintosh documentation for instructions. 

Connecting to a Computer
37
3. Connect the small terminal of the Macintosh desktop adapter to 
the other end of the projector video cable.
4. Disconnect the monitor cable from the video port on the back of 
the Macintosh. Then connect the projector video cable (with the 
Macintosh desktop adapter attached) to the video port on the 
Macintosh.  

1    Setting Up the Projector
 38
5. To also view the video on the computer’s monitor, attach the large 
end of the Macintosh monitor adapter to the monitor cable and 
connect the other end of the adapter to the projector’s Computer 
Out port.
6. Tighten the screws on all the connectors. 

Connecting to a Computer
39
Connecting the Mouse and Serial Cables
If you want to use the remote control as a mouse or use the ELP 
Link IV software, you need to connect the main cable. It provides 
connectors for:
❐The Mac mouse or USB cable (to use the remote control as a 
mouse)
❐The Mac serial cable (to use the ELP Link IV software)
Refer to this illustration while following the steps below.   
Mac serial cable
Mac or USB 
main cable Mouse/Com 1 port
cable 

1    Setting Up the Projector
 40
1. Connect the small end of the main cable to the projector’s 
Mouse/Com 1 port. (Use the Mouse/Com 2 port to connect a 
second computer.)
2. To use the remote control as a wireless mouse, connect one end of 
the projector’s Mac mouse or USB cable to the MOUSE terminal 
on the large end of the main cable.
3. Disconnect your Macintosh’s mouse cable. Connect the other end 
of the projector’s Mac mouse or USB cable to the mouse or USB 
port on your Macintosh. 

Connecting to a Computer
41
4. To use the ELP Link IV software or to program new effects for the 
Effects buttons on the remote control, connect one end of the Mac 
serial cable to the Mac SERIAL terminal on the large end of the 
main cable. 
5. Connect the other end of the Mac serial cable to the  printer or 
modem port on the back of your Macintosh. 

1    Setting Up the Projector
 42
Connecting the Audio Cable
1. If you will be using audio, connect one end of the audio cable to 
the Audio 1 jack on the projector. (Use the Audio 2 jack if you 
are connecting a second computer.)   
2. Connect the other end of the audio cable to the audio-out port on 
your computer. 
audio cable Audio 1 jack