Motherboard Description
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1.13.3 Clear CMOS (J6D1)
This jumper resets areas of non-volatile, Flash, and CMOS memory to default values. The default
setting for this jumper is pins 20-22 (keep CMOS settings). To reset the CMOS settings to the
default values, turn off the computer, move the jumper to pins 18-20, then turn on the computer.
When the computer displays the message “NVRAM cleared by jumper,” turn off the computer and
return the jumper to pins 20-22 to restore normal operation.
1.13.4 BIOS Setup Access (J6D1)
This jumper enables or disables access to the Setup program. The default setting is pins 28-30
(access enabled). To disable access to the Setup program, move the jumper to pins 26-28.
1.13.5 BIOS Recovery (J6D1)
This jumper lets you recover the BIOS data from a diskette in the event of a catastrophic failure.
The default setting is pins 4-6 (normal operation). To recover the BIOS, turn off the computer,
move the jumper to pins 2-4, then turn on the computer to perform BIOS recovery. After recovery,
turn off the computer and return the jumper to pins 4-6 to restore normal operation. Refer to
Section 3.14 for more details.
1.14 Reliability
The Mean-Time-Between-Failures (MTBF) data is calculated from predicted data @ 55 °C.
Motherboard MTBF: 61534 hours calculated
1.15 Environmental
Table 5. Motherboard Environmental Specifications
Parameter Specification
Temperature
Non-Operating -40 °C to +70 °C
Operating +0 °C to +55 °C
Vibration
Unpackaged 5 Hz to 20 Hz : 0.01g² Hz sloping up to 0.02 g² Hz
20 Hz to 500 Hz : 0.02g² Hz (flat)
Packaged 10 Hz to 40 Hz : 0.015g² Hz (flat)
40 Hz to 500 Hz : 0.015g² Hz sloping down to 0.00015 g² Hz
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