Installing the Motherboard
User’s Manual
2-13
(8). CCMOS1: CMOS Discharge Jumper
Jumper CCMOS1 discharge CMOS memory. When
you install the motherboard, make sure this jumper is
set for normal operation (pin 1 and 2 shorted). See
Figure 2-8.
Figure 2-8. CCMOS1 jumper setting
Note
Before you clear the CMOS, you have to first turn the power off (including the +5V standby power).
Otherwise, your system may work abnormally.
After updating your BIOS and before boot up, please clear the CMOS first. Then put the jumper to its
default position. After that, you can reboot your system and ensure that your system is working fine.
(9). PN1 and PN2 Headers
PN1 and PN2 are for switches and indicators for the
chassis’s front panel, there are several functions that
come from these two headers. You have to watch the
pin position and the orientation, or you may cause
system malfunctions. Figure 2-9 shows you the PN1
and PN2 functions of the pins.
Figure 2-9. The definition of PN1 and PN2 pins
Summary of Contents for KR7A-133
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