Installing and Replacing Desktop Board Components
51
Front Panel Header
Figure 24, H shows the location of the front panel header. Table 13 shows the pin
assignments and signal names for the front panel header.
Table 13. Front Panel Header Signal Names
Pin Description In/Out
Pin Description In/Out
Hard Drive Activity LED Power LED
1 Hard disk LED pull-up to +5 V
Out 2 Front panel green LED Out
3 Hard disk active LED Out 4 Front panel yellow LED Out
Reset Switch On/Off Switch
5 Ground 6 Power switch In
7 Reset switch In 8 Ground
Power Not Connected
9 Power Out 10 No pin
NOTE
When connecting individual wires from your chassis front panel to the front panel
header, be sure to observe the connection polarity. Positive wires are usually
solid color and negative wires are usually white or striped.
Chassis Intrusion Header
Figure 24, I shows the location of the chassis intrusion header. This header can be
connected to a mechanical switch on the chassis to detect if the chassis cover is
removed. This switch should be in the open position when the chassis cover is
installed and closed when the cover is removed.
Table 14 shows the pin assignments and
signal names for
the chassis intrusion header.
Table 14. Chassis Intrusion Header Signal Names
Pin Description
1 Intruder#
2 Ground
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