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GA-686DX
ON
ON
OFF
OFF 2.5
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ON
OFF
OFF 2.5
ON
OFF
ON
OFF 3
OFF
OFF
ON
OFF 3
OFF
ON
ON
OFF 3.5
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ON 4
M
The CPU is a sensitive electric component and it can be easily
damaged by static electricity, so users must keep it away from metal
surface when the CPU is installed onto mainboard.
3.6. CMOS RTC & ISA CFG CMOS SRAM
There're RTC & CMOS SRAM on board, they have a power supply from
internal battery to keep the DATA inviolate & effective. The RTC is a REAL-
TIME CLOCK device which provides the DATE & TIME to system.
The CMOS SRAM is used for keeping the information of ISA device system
configuration, so the system can automatically boot OS. every time.
Due to the life-time of RTC internal battery is 5 years, the user can change a
new RTC to replace old one after it can not work. The new one's brand and
type must be same with old one.
3.7. SPEAKER CONNECTOR INSTALLATION
There is always a speaker in AT system for sound purpose. The 4 - Pins
connector J1 is used to connect speaker.
The speaker can work well in both direction of connector when it is installed to
the connector J1 on mainboard.
3.8. HARDWARE RESET SWITCH CONNECTOR INSTALLATION
The RESET switch on panel provides users with HARDWARE RESET
function which is almost the same as power-on/off.
The system will do a cold start after
released by user. The RESET switch is a 2 PIN connector and should be
installed to J2 on mainboard.
3.9. POWER LED & KEY LOCK CONNECTOR INSTALLATION
60
150
PENTIUM Pro 150 MHz
66
166
PENTIUM Pro 166 MHz
60
180
PENTIUM Pro 180 MHz
66
200
PENTIUM Pro 200 MHz
66
233
PENTIUM Pro 233 MHz
66
266
PENTIUM Pro 266 MHz
the RESET switch is pushed and
3-6
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