SOYO SY-P4X400 quick start Cmos Clear JP5, PowerOn/OffPWRBT, ATX12VPowerSupplyATXPW

SY-P4X400 DRAGON Lite Quick Start Guide

PowerOn/Off:PWRBT

Connectyourpowerswitchtothisheader(momentaryswitchtype).

Toturnoffthesystem,pressthisswitchandholddownforlongerthan4seconds.

ATX12VPowerSupply:ATXPW

AttachtheATX12VPowercabletothreeconnector.(ThismotherboardrequiresanATX12Vpowersupply,anATandATX powersupplycanNOTbeused.)

WhenusingthePower-OnbyPS/2Keyboardfunction,pleasemakesuretheATXpowersupplyisabletoprovideatleast 720mA onthe5VStandbylead(5VSB).

PS. Power supply must be useATX 12V specification.

Anew superset of the originalATX power supply is now defined. Named “ATX 12V,” this new power supply is comprised of a standardATX unit plus the following enhancements:

Increased +12 VDC output capability. Mother board components with unique voltage requirements are increasingly expected to be powered via DC/DC converters off the +12 VDC power supply output.This trend is due primarily to the higher power conversion and transmission efficiencies of +12 VDC relative to +5 VDC or +3.3 VDC.ATX12V power supplies should be designed to accommodate these increased +12 VDC current requirements and to address associated issues such as cross-regulation, capacitive loading, transient surge tolerance, cable voltage drop, and cooling.

New +12 V power connector.To enable the delivery of more +12 VDC current to the motherboard, a new 4-pin receptacle/header combination--the + 12 V power connector–has been defined. The presence of the +12 V power connector indicates that a power supply isATX12V; the absence of the +12 V power connector indicates that a supply isATX.

CMOS Clear (JP5)

In some cases the CMOS memory may contain wrong data, follow the steps below to clear the CMOS memory.

1.Clear the CMOS memory by momentarily shorting pin 2-3 on jumper JP5. Its white colored cap can easily identify this jumper.

2.Then put the jumper back to 1-2 to allow writing of new data into the CMOS memory.

CMOSClearing	ClearCMOSData			RetainCMOSData
JP5Setting	Short pin2-3 for			Short pin 1-2to
	at least 5 seconds to			retainnewsettings
	clear the CMOS	2	3	1	2	3
	1

Note:You must unplug theATX power cable from theATX power connector when performing the CMOS Clear operation.

Hardware Installation

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