Epson Equity 286 PLUS, Руководство пользователя

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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 options or if you want to change the
way your computer operates.
If you need to replace the battery for your computer’s real-time
clock and CMOS RAM, you can follow the instructions in this
chapter.
Before you can change jumper settings, replace the battery, or
install any of the options mentioned above, you need to remove
the cover from the computer. You may also need to remove the
subassembly. 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 options, replace the battery, or change jumper
settings, you need to remove the cover from your computer.
Follow these steps:
1. Turn off the computer and then any peripheral devices
(including the monitor and printer).
2. Disconnect the computer’s power cable from the electrical
outlet and from the back panel. Then disconnect any cables
that are connected to the computer, including the keyboard
cable.
3. If the monitor is on top of the computer, lift it off and set it
to one side.
5-2 Installing and
Removing Options