Tyan Computer TYAN S1668 Soft Power On Switch J1 CPU FAN Power J49 and J50, Turbo Switch

Soft Power On Switch: J1

CPU FAN Power: J49 and J50

3.3 CMOS RTC

Pinout Assignment

1Soft Power On

2Ground

Pinout Assignment

112Volts

2Ground

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.

S1668-ATX-001 http://www.tyan.com 11