Tyan Computer TYAN S1668 - Manual (Page 11)

11 S1668-ATX-001 http://www.tyan.com
Soft Power On Switch: J1
Pinout Assignment
1
Soft Power On
2 Ground
CPU FAN Power: J49 and J50
Pinout Assignment
1
12Volts
2 Ground
3.3 CMOS RTC
CMOS RTC includes an internal battery and Real Time Clock circuit. It
provides the date and the time for the system. Normally the life span of a
RTC internal battery is 10 years. When replacing, you should use the same
model.
3.4 Speaker Connector Installation
S1668 provides a 4-Pin header (J43) to connect the speaker. The polarity
can go either way.
3.5 Turbo Switch
The front panel on your case may have a turbo switch to control system
speed when slower program execution is required for software developed
in the old XT days. The Intel 44FX chipset doesn't support a de-turbo
mode, but the S1668 has a connector (J47) for the cable that may come has
a connector (J47) for the cable that may come with the case.with the case.
3.6 Turbo LED Connector Installation
The TURBO LED on the front case panel can indicate the current speed
status of the system. The TURBO LED connector should be installed to
J42 in the correct direction.