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Chapter 2
button on your ATX case, or by enabling the Power Management and Suspend Mode
options in BIOS's Power Management menu. (See section 3.5)
Poly-fuse Over Current Protection
The poly-fuse protects the system from dangerous voltages that the system might be
exposed to via the keyboards or USB connectors. In case of such an exposure, the
poly-fuse will immediately be disconnected from the circuit, just like a normal fuse. After
being disconnected for a certain period of time, the poly-fuse will return to its normal
state and the keyboard or USB connector can function properly again. Unlike
conventional fuses, the poly-fuse will not need to be replaced, relieving the user from
such inconveniences.
CN1A (Front Panel Connector)
1. PWR-SW (Over-ride Power Button Connector)
The power button on the ATX chassis can be used as a normal power switch as well as a
device to activate Advanced Power Management Suspend mode. This is power- saving
mode used for saving electricity when the computer is not in use for a long period of
time. The Soft-OFF by PWR-BTTN function in BIOS's Power Management Setup menu
must be set to [Delay 4 Sec.] to activate this function.
When the Soft-OFF by PWR-BTTN function is enabled, pushing the power button
rapidly will switch the system to Suspend mode. Any occurrence of external activities
such as pressing a key on the keyboard or moving the mouse will bring the system back
to Full-On. Pushing the button while in Full-On mode for more than [4 seconds] will
switch the system completely off. See Over-ride Power Button Operation diagram.
2. P-LED (Power LED Connector)
The power indicator LED shows the system's power status. It is important to pay
attention to the correct cables and pin orientation (i.e. Be careful not to reverse the order
of these two connectors.)
3. G-BTN/G-LED (Green Button Switch/LED Connector)
Some ATX cases provide a Green button switch, which is used to put the system in
Suspend mode. While in Suspend mode, the power supply to the system is reduced to a
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