Jumper Setting; Setting Jumper - Acer Aspire X3990 Service Manual

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Jumper Setting

The section explains how to set jumper for correct configuration of the mainboard.

Setting Jumper

Use the motherboard jumpers to set system configuration options. Jumpers with more Than one pin are
numbered. When setting the jumpers, ensure that the jumper caps are Placed on the correct pins.
The illustrations show a 2-pin jumper. Whenthe jumper cap is placed on both pins, thejumper is SHORT. If you
remove the jumpercap, or place the jumper cap on just one pin,the jumper is OPEN.
This illustration shows a 3-pin jumper. Pins1 and 2 are SHORT.
Checking Jumper Settings
The following illustration shows the location of the motherboard jumpers. Pin 1 is labeled.
Chapter 5
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