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AP440FX Motherboard Technical Product Specification
1.12.1.6
Reset
This 2-pin header can be connected to a momentary SPST type switch that is normally open.
When the switch is closed, the computer performs a hard reset and runs POST.
1.12.1.7
Speaker
The speaker provides error beep code information during the POST, if the computer cannot use the
video interface. Jumpering pins 26-27 (the last two pins of J2A1) engage the onboard speaker. To
disable the onboard speaker (and allow use of the chassis speaker), remove the jumper from these
pins.
1.12.1.8
Keylock Connector (J3A1)
The Keylock connector pinout is listed in Table 5.
Table 5.
Keylock Connector (J3A1)
Pin
Signal Name
1
Ground
2
KB_LOCK
3
Ground
1.12.1.9
Fan Connector (J4A1)
The auxiliary fan connector (J4A1) is a 1-by-3 header that can accept either two-position (power
and ground) or three-position (power, ground, and fan sense) fan plugs. Figure 6 indicates the
required orientation and positioning of the fan plug. Table 6 lists the signals and pinout for the fan
connector.
Table 6.
Auxiliary Fan Connector (J4A1)
Pin
Signal Name / Function
1
Ground
2
Fan Power
3
Fan Sense (Tachometer)
24
3-Wire Fan
Connector
Figure 6. Fan Connector Usage
J4A1
Fan Sense
(Tach.)
3
Fan Power
1
Ground
Std. Fan
Connector
OM06181
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