Epson Powerlite 7550c Users Guide

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You should already have connected the power cord, the projector’s 
video cable, and any other cables required for the equipment you are 
using, as described in Chapter 1.
Note: To keep the illustrations in this section simple, the pictures 
show only how to connect the ELP Link III cables; they don’t show 
the power, video, or other cables you already connected.
Connecting to a PC Desktop or Laptop
The following instructions explain how to connect the ELP Link III...

Connecting the ELP Link III Cables
89
 
Note: This illustration shows a desktop, but the steps are the same if 
you have a laptop.
1. If you connected the PS/2 mouse cable that came with the 
projector—as described on page 26 (desktop) or page 30 
(laptop)—disconnect it from the computer and the projector.Mouse/Com port
main cablePS/2 mouse cable
9-pin serial cable 

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2. Connect the round end of the main cable to the projector’s 
Mouse/Com port.
3. Connect one end of the PC serial cable to the PC SERIAL 
terminal on the square end of the main cable.
Note: You won’t be able to use the ELP Link III software if your 
system has only one serial port that is being used to support a 
serial mouse. 

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91
4. Connect the other end of the PC serial cable to the serial port on 
the back of your computer.
5. If you want to use the remote control as a mouse for your 
computer, connect the 9-pin end of the PS/2 mouse cable that 
came with your ELP Link III kit to the MOUSE terminal on the 
square end of the main cable.
Note: If your computer uses a serial mouse, perform steps 5 and 
6 using the serial mouse cable that came with your ELP Link III 
kit instead of the PS/2...

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Connecting to a Macintosh Desktop or PowerBook
The following instructions explain how to connect the ELP Link III 
cables to your Macintosh desktop or PowerBook. The steps are the 
same for both types of computers except where noted otherwise. 
You must connect both the main cable and the Mac serial cable that 
came with the ELP Link III kit to use the ELP Link III software and 
the Effects buttons on the remote control. If you want to use your 
remote control as a...

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93
Note: This illustration shows a desktop, but the steps are the same if 
you have a PowerBook.
1. If you connected the Mac mouse cable that came with the 
projector—as described on page 36 (desktop) or page 42 
(PowerBook)—disconnect it from your computer and the 
projector.
Mac serial cable
Mac mouse cable
main cable Mouse/Com port 

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2. Connect the round end of the main cable to the projector’s 
Mouse/Com port.
3. Connect one end of the Mac serial cable that came with the ELP 
Link III kit to the MAC SERIAL terminal on the square end of 
the main cable.
4. Connect the other end of the Mac serial cable to the  printer 
or   modem port on the back of your computer. 

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95
5. If you want to use the remote control as a mouse for your 
Macintosh, connect the 9-pin end of the Mac mouse cable that 
came with the ELP Link III kit to the MOUSE terminal on the 
square end of the main cable.
6. Connect the other end (labeled MAC MOUSE) of the Mac 
mouse cable that came with the ELP Link III kit to the mouse 
port on your computer.
Note: If you have a PowerBook, you may need to choose 
Mirroring in the Display Control Panel to display the image...

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Installing the ELP Link III Software
You can use the ELP Link III software on any Windows system, and 
on Macintosh OS System 7.x and OS System 8.x. 
Installing the Software for Windows
1. Turn on your computer and start Windows. 
2. Close any open Windows applications and turn off any screen 
savers.
3. Insert the Projector Software CD into your CD-ROM drive.
4. If you have Windows 95, 98, or NT, the installer program 
should start automatically. Go to step 5. If...

Installing the ELP Link III Software
97
7. The next screen asks if you want to install the ELP Link III 
User’s Guide and Adobe
® Acrobat
® Reader. Select the User’s 
Guide if you want to install it and Acrobat Reader if it is not 
already installed on your system. Then click Install.
8. Follow the instructions on the screen to install the software. 
When the installation is complete, click Finish.
Installing the Software on a Macintosh
1. Insert the Projector Software CD into your CD-ROM drive.
2....