Power Supply Primary | NEC SP B-Series specification

Power Supply (Primary)

Voltages from the power supply are input to the system board through the primary power supply connector. The following table shows the connector pin locations and pin assignments.

Primary Power Supply Connector Pin Assignments

Pin	Signal	Pin	Signal
1	+3.3V	11	+3.3V
2	+3.3V	12	-12V
3	Ground	13	Ground
4	+5V	14	PS-ON# (Power supply
			remote on/off control)
5	Ground	15	Ground
6	+5V	16	Ground
7	Ground	17	Ground
8	PWRGD (Power Good)	18	-5V
9	+5VSB	19	+5V
10	+12V	20	+5V

B-6 Connector Pin Assignments

Image 107

NEC SP B-Series manual Power Supply Primary, Primary Power Supply Connector Pin Assignments

Contents

DI Rect I on SP B-SERIES Proprietary Notice and Liability Disclaimer Contents Iv Contents Option Installation Disassembly and Reassembly System Resources Vi Contents List of Figures List of Tables Viii Contents Preface Preface Abbreviations Xii Technical Information Technical Information Front Features Desktop ModelsSystem Overview MIDI/Game Port Line Out Jack Line In Jack Microphone Jack Rear Features Desktop ModelsAudio Connectors Desktop Models Video Connector Rear Features Minitower Models Front Features Minitower Models System Cache/Memory Audio Connectors Minitower ModelsSystem Board Processor Expansion Bus ChipsetPCI Local Bus System Memory Map Cmos Memory/Real-Time Clock BatteryDMA/IRQ Settings Plug and Play Support Resource Interrupt Level AssignmentsDMA Assignments System Resource Sound System IDE PortsPorts Hard Drive Power SupplyModem Board optional Diskette Drive Power Management Utilities Utilities Bios Setup UtilityWhen to Use Setup Main Setup Menu How to Start SetupHow to Use Setup Menu Bar Getting Help Setup Key FunctionsSelecting a Menu Item Displaying a Submenu Main Menu Advanced Menu Peripheral Configuration Submenu IDE Configuration Submenu Utilities Floppy Options Submenu DMI Event Logging Submenu Video Configuration Submenu Security Menu Resource Configuration Submenu Boot Menu Power Menu Removable Devices Submenu Hard Drive Submenu Exit Menu Intel Processor Serial Number Control Utility Processor Serial Number FAQsSystem Requirements Why would I want to turn off my processor serial number? Technical Support Errata Option Installation General Rules PrecautionsOption Installation Access Cover Removal Release Tab Access Cover ReplacementReleasing the Cover Tabs Slots Expansion BoardsAligning the Tabs ISA Slots PCI/ISA Slot PCI Slots AGP Slot Expansion Board InstallationExpansion Slot Locations Locating Expansion Slots Screw Slot Cover Removing the Slot Cover Expansion Board Removal Memory UpgradeInstalling a Board Bank Total RAM Sample Memory Configurations Removing a Dimm Dimm Removal Data Storage Devices Dimm InstallationInstalling a Dimm Locating Device Slots Device SlotsDevice Preparation Device Cables System Board Cable ConnectorsDiskette Drive Cable Connector Secondary IDE Cable Connector Diskette Drive Signal Cable Diskette Drive Signal CableIDE Signal Cables Power Cable Connectors System Power CablesIDE Signal Cable Cabling an IDE Device Cabling an Accessible 5 1/4-Inch DeviceConnecting IDE Device Cables Device Cabling Removing the Front Panel Storage Device InstallationConnecting an Accessible 5 1/4-Inch Device Device Connector Red Edge Signal Cable Two Release Tabs Removing the CD-ROM/DVD DriveReleasing the Front Panel Locating the Device Cage Screw Installing a 3 1/2-Inch Device Hole Tab Removing the Bracket ScrewsAligning the Holes and Tabs Inserting the Device Securing the Drive Be careful of sharp edges Installing a 5 1/4-Inch Device Replacing the Front Panel Installing the Device Locating the Parallel Port External OptionsParallel Printer Locating the Serial Ports RS-232C Device Connection Maintenance and Troubleshooting Service Telephone Number MaintenanceNEC CSD Service and Information Telephone Numbers Maintenance and Troubleshooting Mouse Cleaning System CleaningKeyboard Cleaning Diagnosing and Solving Problems Troubleshooting Problem Symptom Solution Problems and Solutions Problems and Solutions Problems and Solutions Problems and Solutions Beeps Description Beep CodesBeep Code Descriptions Locating the Battery Cmos Battery Replacement Maintenance and Troubleshooting Disassembly and Reassembly Sequence Part See Disassembly SequenceDisassembly and Reassembly System Access Cover Disassembly Removing a Board Front Panel Removal Device Cage Removal Side Panel Removal Locating the Two Diskette Drive Clips Diskette Drive Removal4-Inch Device Removal Removing the 5 1/4-Inch Device Screws Optional 3 1/2-Inch Hard Drive Removal Removing the Drive Standard 3 1/2-Inch Hard Drive RemovalRemoving the Securing Screw Dimm Module Removal Fan Assembly RemovalPower Supply Removal System Board Removal Removing the Power Supply Screws Removing the System Board Screw Illustrated Parts Breakdown Direction SP B-Series Desktop Field-Replaceable Parts List 3C509C-TX network board Direction SP B-Series Desktop Illustrated Parts Breakdown Direction SP B-Series Minitower Field-Replaceable Parts List Speaker, internal Direction SP B-Series Minitower Illustrated Parts Breakdown System Specifications Processor Random Access MemorySystem Specifications Calendar Clock System Specifications A-3Read-Only Memory Video Memory Device Slots Expansion SlotsKeyboard and Mouse Storage Devices Graphics System Specifications A-5 Sound System DimensionsWeight Power Recommended Operating Environment System Specifications A-7 Connector Pin Assignments Connectors Number System Board ConnectorsConnector Pin Assignments Connector Pin Assignments B-3 System Board Expansion Slot, Memory, and I/O ConnectorsSystem Board Connectors and Jumper Function Number Type System Board Internal ConnectorsSystem Board Connector Numbers and Types Description Connector Number Parallel Port Connector Pin Assignments Serial Interface ConnectorsParallel Interface Connector RS-232C Serial Port Connector Pin Assignments Primary Power Supply Connector Pin Assignments Power Supply Primary Connector Pin Assignments B-7 Keyboard and Mouse ConnectorsKeyboard and Mouse Connector Pin Assignments Front Panel Connector Pin Assignments Pin Description Diskette Drive Interface ConnectorDiskette Drive Connector Pin Assignments Connector Pin Assignments B-9 IDE Interface ConnectorIDE/PCI Connector Pin Assignments Dimm Socket Pin Assignments Dimm Sockets Connector Pin Assignments B-11 AGP ConnectorAGP Connector Pin Assignments SBA3 ISA Expansion Slot Pin Assignments ISA Expansion Bus ConnectorsConnector Pin Assignments B-13 Pin Direction Signal SA3 PCI Expansion Slot Pin Assignments PCI Expansion Bus ConnectorsConnector Pin Assignments B-15 Pin Signal Name Universal Serial Bus USB ConnectorsUSB Connectors System Resources System Resources IRQ SettingsSystem Resource Information Locating the Jumper Jumper SettingsSystem Board Jumper Settings Function Jumper J8A1 Configuration Clearing Your Password System Resources C-5 Recovering the Bios Glossary Glossary APM AVI Bit Block Transfer Boot sector Cmos Dimm Eide Hz a unit of frequency equal to one cycle per second KB 1024 bytes Midi Interface that communicates eight bits at a time To extract data from a storage device such as a diskette Printer with a serial interface Tracks per inch To record or store information to a storage device Index-1 Index Index-2 IPB Index-3 Post Index-4 Index-5 USBPage Battery Replacement 102343SRV