Air 486PH, Руководство пользователя, Страница: 8 / 48

CHAPTER 2: BOARD’S JUMPERS & CONNECTORS
When working with the 486PH, it is extremely
important that you avoid
Electrical Static Discharge (ESD).
Always ground yourself by wearing a
grounded wristband or ankle strap.
Figure 1 on the next page shows the component layout of the
486PH system board with locations of the system board jumpers
and connectors. Note that most of the jumpers and connectors
on the system board are labeled with proper names with pin 1
marked as '
1
'. To avoid damaging the board and to ensure proper
operation, caution should be taken when connecting these
jumpers and connectors.
JUMPER DESCRIPTIONS
Jumpers are used to select between various operating modes. A
jumper switch consists of two, three, or four gold pins projecting
from the system board. Placing the plastic jumper cap over two
pins connects those pins and makes a particular selection. Using
the jumper cap to cover two pins in this way is referred to as
shorting those pins. If the cap is not placed on any pins at all or
placed on only one pin, this is referred to as leaving the pins
open.
Note: When you open a jumper, leave the plastic jumper cap
attached to one of the pins so you don't lose it.
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