Epson 3865X Plus - Manual (Page 109)

A math coprocessor speeds up the numeric calculations your
computer performs when using certain application software. If
you purchase a math coprocessor, it is a good idea to ask your
dealer to install it for you, because it can be damaged easily. If
you decide to install it yourself, follow the steps in this chapter.
This chapter also explains how to change the jumper settings
inside the computer. You may need to change jumper settings if
you install certain types of option cards or if you want to change
the way your computer operates.
Before you can change jumper settings or install any of the
options mentioned above, you need to remove the cover from
the computer. Be sure to heed all the warnings in this chapter
so you do not injure yourself or damage the computer.
Removing the Cover
To install optional equipment or change jumper settings, you
need to remove the cover from your computer. Follow these
steps:
1. Turn off the computer and then any peripherals (including
the monitor and printer).
2. Disconnect the computer’s power cable from the electrical
outlet and from the back panel. Then disconnect any
peripheral cables that are connected to the computer.
3. If the monitor is on top of the computer, lift it off and set it
to one side.
4. Disconnect the keyboard.
5-2 Installing and Removing Options