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HP Mini dc7900 tower 7.4Signal Distribution, Table, Designator, Component function, System Board Component Designations

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Power and Signal Distribution

7.4Signal Distribution

Table 7-7 lists the reference designators for LEDs, connectors, headers, and switches used on the system boards for systems covered in this guide. Unless otherwise indicated, components are used on all system boards.

	Table 7-7.
	System Board Component Designations

Designator	Component function	Notes
CR1	+5 VDC LED
E1	Descriptor table override header
E14	SPI ROM boot block header
E49 / JP49	Password clear header / jumper
J9	Stacked RJ-45 & dual USB connectors
J10	Stacked quad USB connectors
J20	PCI 2.3 connector	SFF & CMT only
J21	PCI 2.3 connector	CMT only
J22	PCI 2.3 connector	CMT only
J31	PCIe x1 connector	SFF & CMT only
J32	PCIe x1 connector	SFF & CMT only
J41	PCIe x16 graphics connector	SFF & CMT only
J42	PCIe x4 graphics (x16) connector	SFF & CMT only
J50	Parallel port	SFF & CMT only
J68	Stacked keyboard, mouse PS/2 connectors
J69	VGA monitor DB-15 connector
J78	Stacked audio line-in, headphone/line-out 1/8” jacks
J103	DC input	USDT only
P1	Power supply connector	SFF & CMT only
P3	Vccp (PWRCPU) header
P5	Control panel (power button, power LED) header
P6	Internal speaker header
P8	CPU fan header
P9	Chassis fan, primary, header
P10	Diskette drive connector	SFF & CMT only
P23	Front panel audio header
P24	Front panel USB header
P52	Serial port, secondary, header	SFF & CMT only
P53	Serial port, primary connector	SFF & CMT only
P54	Serial port, primary header	SFF only
P60	SATA0 (controller 1, primary master) connector (dark blue)
P61	SATA1 (controller 1, secondary master) connector (white)	SFF & CMT only
P62	SATA2 (controller 1, primary slave) connector (light blue)	SFF & CMT only
P63	SATA3 (controller 1, secondary slave) connector (orange)	CMT only
P64	SATA4 / eSATA (controller 2, primary master) connector (black)	SFF & CMT only
P124	Hood lock header	SFF & CMT only
P125	Hood sense header
P126	Parallel port header	SFF and CMT only
P150	Media reader header
P151	Ready boost / dash NIC header

7-10

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Technical Reference Guide

Contents

Technical Reference Guide Technical Reference Guide Contents 1 Introduction 2 System Overview 3 Processor/Memory Subsystem 4 System Support 5 Input/Output Interfaces 6 Integrated Graphics Subsystem 7 Power and Signal Distribution 8 SYSTEM BIOS AError Messages and Codes Index Introduction 1.1About this Guide 1.1.1 Online Viewing 1.1.2 Hardcopy 1.2Additional Information Sources 1.3Serial Number 1.4Notational Conventions 1.4.1 Special Notices 1.4.2Values 1.4.3 Ranges 1.5Common Acronyms and Abbreviations Page Page Page Page Page Page Page System Overview 2.1Introduction 2.2 Features Feature Difference Matrix by Form Factor 2.3System Architecture Page 2.3.1 Intel Processor Support 2.3.2 Chipset 2.3.3 Support Components 2.3.4System Memory 2.3.5 Mass Storage 2.3.6 Serial Interface 2.3.7 Universal Serial Bus Interface 2.3.8 Network Interface Controller 2.3.9 Graphics Subsystem 2.3.10 Audio Subsystem 2.4 Specifications Physical Specifications Optical Drive Specifications Hard Drive Specifications Processor/Memory Subsystem 3.1Introduction 3.2Intel Processors 3.2.1 Intel Processor Overview 3.2.2 Processor Changing/Upgrading 3.3Memory Subsystem 3.3.1 Memory Upgrading 3.3.2Memory Mapping and Pre-allocation Page System Support 4.1Introduction 4.2PCI Bus Overview 4.2.1 PCI 2.3 Bus Operation Page 4.2.2 PCI Express Bus Operation Software/Driver Layer Transaction Protocol Layer Link Layer Physical Layer 4.2.3 Option ROM Mapping 4.2.4 PCI Interrupts 4.2.5 PCI Power Management Support 4.2.6 PCI Connectors PCI 2.3 Connector PCI Express Connectors 4.3 System Resources 4.3.1 Interrupts 4.3.2Direct Memory Access 4.4 Real-TimeClock and Configuration Memory 4.4.1 Clearing CMOS 4.4.2 Standard CMOS Locations 4.5 System Management 4.5.1 Security Functions Power-On /Setup Password Setup Password Cable Lock Provision I/O Interface Security Chassis Security 4.5.2 Power Management 4.5.3 System Status 4.5.4Thermal Sensing and Cooling 4.6 Register Map and Miscellaneous Functions 4.6.1 System I/O Map System I/O Map 4.6.2 GPIO Functions ICH10 Functions SIO Controller Functions Input/Output Interfaces 5.1Introduction 5.2SATA/eSATA Interfaces 5.2.1 SATA interface 5.2.2 eSATA interface 5.3Diskette Drive Interface 34-PinDiskette Drive Connector Pinout 5.4Serial Interface 5.5Parallel Interface Support 5.5.1 Standard Parallel Port Mode 5.5.2 Enhanced Parallel Port Mode 5.5.3 Extended Capabilities Port Mode 5.5.4 Parallel Interface Connector 5.6Keyboard/Pointing Device Interface 5.6.1 Keyboard Interface Operation 5.6.2 Pointing Device Interface Operation 5.6.3 Keyboard/Pointing Device Interface Connector 5.7Universal Serial Bus Interface 5.7.1 USB Connector 5.7.2 USB Cable Data 5.8Audio Subsystem 5.8.1 HD Audio Controller 5.8.2HD Audio Link Bus 5.8.3 Audio Multistreaming 5.8.4 Audio Specifications 5.9Network Interface Controller 5.9.1 Wake-On-LANSupport 5.9.2 Alert Standard Format Support 5.9.3 Power Management Support 5.9.4 NIC Connector 5.9.5 NIC Specifications Integrated Graphics Subsystem 6.1Introduction 6.2 Functional Description less Settings Advanced Adapter 6.3Display Modes 6.4 Upgrading 6.5 Monitor Connectors 6.5.1 Analog Monitor Connector 6.5.2 DisplayPort Connector Page Power and Signal Distribution 7.1Introduction 7.2Power Distribution 7.2.1 USDT Power Distribution 7.2.2SFF/CMT Power Distribution SFF 240-WattPower Supply Unit Specifications CMT 365-WattPower Supply Unit Specifications 7.2.3 Energy Star Compliancy 7.3Power Control 7.3.1 Power Button Power LED Indications Power LED Condition 7.3.2 Wake Up Events 7.3.3 Power Management 7.4Signal Distribution Table 7-7. (Continued) Page SYSTEM BIOS 8.1Introduction 8.2 ROM Flashing 8.2.1 Upgrading 8.2.2Changeable Splash Screen 8.3 Boot Functions 8.3.1 Boot Device Order 8.3.2Network Boot (F12) Support 8.3.3 Memory Detection and Configuration 8.3.4Boot Error Codes 8.4 Client Management Functions 8.4.1 System ID and ROM Type 8.4.2 Temperature Status 8.5 SMBIOS 8.6 USB Legacy Support 8.7 Management Engine Functions Error Messages and Codes A.1 Introduction A.2 Beep/Power LED Codes A.3 Power-OnSelf Test (POST) Messages Page Page A.4 System Error Messages (1xx-xx) A.5 Memory Error Messages (2xx-xx) A.6 Keyboard Error Messages (30x-xx) A.7 Printer Error Messages (4xx-xx) A.8 Video (Graphics) Error Messages (5xx-xx) A.9 Diskette Drive Error Messages (6xx-xx) A.10 Serial Interface Error Messages (11xx-xx) A.11 Modem Communications Error Messages (12xx-xx) A.12 System Status Error Messages (16xx-xx) A.13 Hard Drive Error Messages (17xx-xx) Page A.14 Hard Drive Error Messages (19xx-xx) A.15 Video (Graphics) Error Messages (24xx-xx) A.16 Audio Error Messages (3206-xx) A.17 DVD/CD-ROMError Messages (33xx-xx) A.18 Network Interface Error Messages (60xx-xx) A.19 SCSI Interface Error Messages (65xx-xx, 66xx-xx, 67xx-xx) A.20 Pointing Device Interface Error Messages (8601-xx) Page Numerics Index