The S1686D system board--T AHOE 2I ATX, is a quality, high performance,
dual processing motherboard designed for Intel's latest generation Pentium II
microprocessors. This motherboard utilizes Intel's 440FX PCI series chipset and
supports CPU speeds of 233MHz to 300MHz. The S1686D, designed for a dual
system, will also support two Pentium Pro processors with T yan riser cards.
The S1686D's PCI Local Bus provides high performance capabilities that
are ideal for a wide range of demanding applications such as: CAD, CAM, CAE,
networking, multi-user environments, database management, desktop publishing,
image processing, 3D animation and video production.
This integrated system board achieves high reliability with numerous
features and yet is small enough to be supported in an "ATX" form-factor. Some
of the features included are: on-board dual channel PCI PIO (Mode 3 & 4), DMA
(Mode 2) IDE, on-board floppy controller, and on-board high speed I/O.
To provide you with the best board possible on the market, Tyan has also
incorporated into the board design the newest technologies available in the
industry . These new features include the following:
1 . LM78 Power Monitoring (See Appendix for details).
2 . Power off through Software for Windows 95: This function allows the
user to turn off the ATX power supply and shut down the system by clicking on
the "Shut Down" button on the "Start Menu"without hitting the power on/off
switch on the case.
3. Recovery after Power Interruption: When this function is set to
"Enabled" in the CMOS Setup, the power of the system will be automatically
turned on as soon as the power is recovered after a power interruption (outage).
The user does not need to hit the Power-on switch on the case to turn on the
system power.
4. W ake on LAN: The S1686D provides the capability for the user to turn
on a system through another server in the Local Area Network.
5. An on-board 12V to 5V Convertor gives support for keyboards with
built-in speakers, such as NMB Concert Master Keyboards.
For more information about your S1686 D board, please refer to Tyan
Computer's web site located at http://www .tyan.com
4S1686D-001-01 http://www.tyan.com
1.2 Hardware Specifications/Features
The S1686D board is designed for the demanding end-user who wants to
accomplish complicated tasks in a user-friendly environment. T o achieve this
purpose, the main board includes the following features:
CPU InformationIntel Pentium II 233 MHz through 300 MHz (233MHz,
266 MHz, 300 MHz) CPUs.
T wo Pentium II Processor slots
Supports Pentium Pro 150-200 MHz (150 MHz,
166MHz, 180MHz, 200MHz) processors
Dual on-board CPU fan headers
(*This features allows you to choose from an array of
processor speeds and CPU types)
Chipset InformationIntel 440 FX series (Natoma) chipset.
25/30/33 MHz PCI bus
(*This newest and fastest Pentium II chipset
offers the fastest performance available on the
market and ensures compatibility of your
system.)
System RAMEight-72 pin SIMMs (4 double banks)
Supports 5V or 3.3V memory
Supports EDO (Extended Data Out), FPM (Fast
Page Mode), ECC (Error Correcting Code) or
Parity checking
(*This feature gives you many options and
upgrade paths for various memory types and
sizes--up to 512 MB)
Disk Drive & System I/O
Two PCI Bus Mastering EIDE channels
Supports EIDE CD-ROMs
PIO Mode 3 & 4 (up to 17 MB/sec DTR)
Bus Mastering Mode (up to 22MB/sec DTR)
T wo floppy drives (up to 2.88 MB)
Two ATX serial ports support 16550 UART's
One ATX ECP/EPP parallel port
5S1686D-001-01
1.3 Software Specifications
BIOS Award or AMI Plug 'n' Play flash BIOS
Deep green and Energy Star compliant.
ATX CMOS setup, BIOS/CHIPSET setup
and hard disk utility included.
Support for easy BIOS upgrades with flash
chip.
Operating SystemOperates with MS-DOS, Windows 3.x, W indows
for W ork Group 3.x, W indows 95, W indows NT
OS/2, Novell Netware, and SCO Unix.
T yan is also a Solaris certified manufacturer.
1.4 Manual Organization
Chapter 1 "Introduction" describes the features and performance of the
S1686D system.
Chapter 2 "Installation" describes the procedures of setting up the system
board. Also refer to this Chapter for detailed information about jumper
settings.
Chapter 3 "Installation and Removal of the CPU" gives detailed instrucÂtions on the installation and removal of the latest Pentium II--Boxed and
Passive CPU's.
If you encounter any problem, refer to Chapter 4 "Trouble-shooting",
which describes trouble-shooting procedures for the system.
6S1686D-001-01 http://www.tyan.com
Refer to Addendum A (AMI BIOS Setup) and Addendum B (A ward BIOS Setup)
for the BIOS Setup requirements and the CMOS Configuration Information,
including instructions to change the password, to format a hard disk, and to
troubleshoot CMOS errors. Both AMI and A ward BIOS documents are also
available in the ADOBE Acrobat format. Please refer to the W eb Page located at
ftp://ftp.tyan.com/manual/s1686da.pdf for AMI and ftp://ftp.tyan.com/manual/
s1686db.pdf for A ward BIOS information.
1.5 Manual Conventions
In this manual, the following terms are used in reference to setting up jumpers:
1. When the term "close" is used, the pin (pins) specified for the jumper should
be connected (closed), and the circuit of the connecting pins will be shorted.
2. When the term "open" is used, the pin (pins) specified for the jumper should
not be connected, and the circuit of the connecting pins will not be shorted.
Pin 1 2 3 4
Pins 1&2: Open
Pins 3&4: Close
(Shorted)
1.6 CPU Prototypes
Currently, Intel produces two types of Pentium II processors: the Active (Boxed)
Processor, and the Passive Processor. (Refer to the pictures shown on Page 8).
These two types of processors are essentially the same in design. The only
difference between these two types of processors lies in their cooling methods.
The Active Processor is equipped with a cooling fan, and the Passive Processor
is equipped with a heat sink. These two types of CPUs provide the user with the
same function, and should be installed in the "Pentium II" (SEC) slots on the
motherboard. (Refer to Chapter 3 for the installation and removal of Pentium II
Processors).
Although the S1686D motherboard is designed for a dual system, it can also
accommodate a single CPU. However, when a single CPU configuration is
chosen, the Pentium II CPU should be installed in the Pentium II Primary slot as
mentioned in Chapter 3.
7S1686D-001-01
Pentium II Boxed (Active) CPU
Shown with Power Connector for Fan
Pentium II (Passive) CPU
Shown with Heatsink
8S1686D-001-01 http://www.tyan.com
Chapter 2: Board Installation
2.1 Unpacking
2.1.1. Item Checklist
The motherboard package should contain the following:
S1686D Motherboard
One IDE 40 pin cable
One 34 pin floppy cable
User's Manual
2.1.2. Precautionary measures before handling the motherboard
Since the motherboard contains sensitive electronic components which can
easily be damaged by static electricity, the motherboard should be left in its
original packaging until it is ready to be installed.
Before you open the carton of your computer, do the following:
1. Make sure that you stand on an Anti-static mattress. (Do not stand on a rug or
carpet.)
2. It is also strongly recommended that you wear an anti-static strap. (Anti-static
straps can be purchased at computer hardware stores.)
3. With the power supply plugged in and the system turned off, touch an unpainted
area of the system chassis before handling the motherboard or any component.
Remember to repeat the above steps whenever you handle the motherboard or its
components.
2.1.3. Proper handling of the motherboard
After opening the S1686D motherboard carton, remove the board by holding its
edges. Place it on a grounded anti-static surface with the component side up.
Inspect the board for damage. Do not touch the bottom of the board.(Note: DO
NOT APPLY POWER TO THE BOARD IF IT HAS BEEN DAMAGED!)
2.2. Installation of the Motherboard
You are now ready to install your motherboard. The mounting hole pattern of the
S1686D matches the ATX system board specifications. Please install the board
in the chassis designed for a standard ATX board form factor.
9S1686D-001-01
2.3.1 Motherboard Layout
MouseKB
J17J18
USB
J22
Com1
Parallel Port
1
J20
J1J2
CPUFan
CPU Ret.Bracket
CPU Ret.Bracket
U55
1
Voltage Convert
CPU
Ret.Brack
Heat Sink Hole
J3J4
1
J23
CPUFan
1
PCI
441FX
CPU Ret.Bracket
1
PCI
442FX
Power Supp.
JP1
J11-14
Heat Sink Hole
J6
J15J16
J7
Com2
Module(key) notch
1
J30J36
1
SMC
Keyboard
V oltage Regulator Module
Heat Sink Hole
CPU Ret.Bracket
CPU Ret.Bracket
Pentium II Second (SEC). Slot
Module(key) notch
PCI Slot 1
PCI Slot 2
J38
PCI Slot 3
PCI Slot 4
PCI Slot 5
ISA Slot 1
ISA Slot 2
ISA Slot 3
SIMM 1
SIMM 2
SIMM 3
J31J32
CPU Ret.Bracket
Pentium II Primary(SEC) Slot
J33J34
1
J37
1
PIIX3
1
J51J52J49J50 J5 5J53J54J47J48J46
J39
Heat Sink Hole
J24J25
FDD CON
1
Primary IDE
1
Secondary IDE
1
I/O APIC
J57J56
1
1
BIOS (CMOS)
AMI/AWARD
SIMM 5
SIMM 4
SIMM 6
J26J27
J35
J42
J44
RTC
SIMM 7
CON4
1
1
J28
1
KeyLock
J40
TB LED
J41
TBSW
J43
CHS Fan
J19
J60
SIMM 8
J29
(J29:See Pin Definition on P .1 1)
1
(For more information about this Motherboard, please visit our W eb Page and
Clickable motherboards at http://www.tyan.com/html/faq.html.)
10S1686D-001-01 http://www.tyan.com
2.3.2 Summary of Jumper Settings
Refer to the following table for quick reference of jumper settings:
Jumper #AssignmentsPg. #
J17Keyboard ConnectorP10
J18PS2 Mouse ConnectorP10
J20, J23CPU Fan (Pin 2 is +12V)P10, P21
J19CHS Fan (Chassis Fan)P10
J11, J12, J37Bus SpeedP12
J13-J16, J24-27DRAM Voltage Select (Do not Change)P12
J22Universal Serial BusP10
J29Pins 1,2: Power on, Pins 3,4: EXTSMI
Pins 8-10: IR2P14,15,16
Pins15,16: IDE LED, Pins18-20: Power LED
Block J29: (Refer to Page 11 for more information.)
Pin No. Definition
1 & 2Power On
3&4EXTSMI
8-10IR2
15&16IDE LED
18-20Power LED
22 & 23 Reset
24-27Speaker
J17: Keyboard Connector
J18: PS/2 Mouse Connector
J22: Universal Serial Bus Ports
CON 5: FDD CON
CON 6: Primary IDE
CON 7: Secondary IDE
CON2: LPT1
CON3: COM1
CON1: COM2
14S1686D-001-01 http://www.tyan.com
Speaker Connector: J29 pins 24-27
Pin Assignments
24+5V
25ground
27Speaker data
(Refer to Page 11 for more information.)
15S1686D-001-01
2.4 CMOS RTC
The CMOS RTC includes an internal battery and real time clock circuit
which provides the date and the time, and the CMOS Chipset Default
Register for the system. Normally , the life span of a R TC internal battery is
more than 10 years. This R TC chip cannot be field upgraded and can only
be changed at a Tyan repairing facility.
2.5 Installing Cables and Connectors
2.5.1 Speaker Connector Installation (J29)
Your S1686D board provides a 4-Pin header to connect the speaker. The
speaker is connected to pins 24-27 of J29. (Refer to Page 10 and Page 11
for detailed information.)
The RESET switch on your case's display panel provides you with the
HARDWARE RESET function which is the same as power on/off. The
system will do a cold start after the RESET switch is pushed by the user.
The RESET switch is a 2 pin connector and should be installed on pins
22 and 23 on J29. (Refer to Page 10 and Page 11 for detailed information.)
2.5.3 IDE LED Connector Installation (J29)
Y our S1686D board provides a 2-Pin header to connect the IDELED cable.
When connected, the IDELED light on the panel of the case flashes if a
IDE activity is detected. The cable is connected to pins 15 & 16 of J29.
(Refer to Page 10 and Page 11 for detailed information.)
2.5.4 Power LED Connector Installation (J29)
The S1686D board also provides a 3-Pin header to connect the Power LED
cable. When connected, the Power LED light on the panel of the case
indicates power on/off of the system. The cable is connected to pins 18-20
of J29. (Refer to Page 10 and Page 11 for detailed information.)
2.5.5 IR2 Connector Installation (J29)
The S1686D board provides a 3-Pin connector (Pins 8-10 of J29) for the
IR2 cable which connects to a Homing Device on the back of the case.
When activated, the Homing Device will send out IR signals to remote I/O
IR devices. (Refer to Page 10 and Page 11 for detailed information.)
16S1686D-001-01 http://www.tyan.com
2.5.6 Flash ROM-Jumper J56
The S1686D uses flash memory to store BIOS Setups. It can be updated
as new versions of the BIOS become available. The flash utility will guide
you through the process step by step. However, we do not recommend
that you flash the onboard BIOS. This procedure should only be
done by a qualified technician or a Tyan technical support engineer.
J56 determines which type of Flash EPROM is used. This jumper has been
set to match the onboard BIOS chip. The factory default for the S1686D
is on pins 1-2(5V). Depending on the type of EPROM used, some boards
will have J56 on pins 2-3(12V). (Refer to Page 13 for more information.)
Warning!!
*Do not change J56--(It has been pre-configured at the factory.)
2.5.7 Hardware CMOS & Password Reset (J44)
If you are locked out of your system because you have forgotten your
password, or you have set the CMOS incorrectly, follow the instructions
below.
a. Power off the system.
b. Short J44 by covering Pin 1 and Pin 2 of J44 with a jumper cap
and short the circuit between these two pins.
c. Wait for 5 seconds, and, then, remove the jumper cap from J44.
d. Apply power to the system.
By following the above procedures, the password and CMOS will be reset
to BIOS defaults.
17S1686D-001-01
2.6 DRAM Installation
The S1686D uses a 64-bit data path from memory to the CPU which will
accommodate up to 512MB of RAM. The motherboard supports FPM
(Fast Page Mode), EDO (Extended Data Out), ECC (Error Correcting
Code), and Parity 72-pin SIMMs. The following table shows some of the
available memory configurations.