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Dell OptiPlex GX1 Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net PC S - Page 42

Some computers have an additional connector P9 that may be used instead of P5 or P6.

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keyboard controller system board +3 VDC battery P1 PWRGOOD power management RTC/ and NIC logic NVRAM POWER1 system power supply PSON# +5 VFP +5 VDC -5 VDC +12 VDC -12 VDC P7 +3.3 VDC PSON# +5 VFP +5 VDC -5 VDC +12 VDC -12 VDC POWER2 +5 VDC -5 VDC +12 VDC -12 VDC RISER riser board +3.3 VDC +5 VDC +12 VDC -12 VDC +5 VFP +5 VDC -5 VDC +12 VDC -12 VDC PCI1 through PCI3 P1 ISA1 through ISA3 internal P2 hard-disk drive internal P3 hard-disk drive P4 3.5-inch diskette drive P5* optional drive P6* optional drive main memory sockets DIMM_A DIMM_B DIMM_C +12 VDC FAN +5 VFP +5 VDC +5 VDC +5 VDC PANEL USB KYBD fuses (2) +5 VDC MICROPROCESSOR processor core regulator +3.3 VDC core VCC +2.1 to +3.5 VDC MOUSE NOTE: +5 VFP is routed to the integrated NIC logic on the system board and to P1 on the riser board. * Some computers have an additional connector (P9) that may be used instead of P5 or P6. 1-30

Section	Page
Contents	3
System Overview	13
Chassis Differences	14
Chassis Similarities	15
Standard Features	15
Pentium II Microprocessor	15
Secondary L2 Cache	15
Main Memory	16
Upgradable BIOS in Flash Memory	16
EIDE Subsystem	16
SMART Technology	16
Integrated Diskette/Tape Drive Controller	17
Integrated SVGA Subsystem	17
Integrated Audio Controller	17
ATI Multimedia Channel	18
Telephony Application Programming Interface	18
Chassis Intrusion Detection	18
Integrated Ethernet NIC Support (Optional)	19
Network Cable Requirements	19
Full Set of I/O Ports	19
Power Supply	20
Location of Major Components	20
Advanced Expansion Features	25
OptiPlex NX1 Computer’s Expansion-Card Slot	26
Low-Profile Computer’s Expansion-Card Slots	26
Midsize Computer’s Expansion-Card Slots	26
Mini Tower Computer’s Expansion-Card Slots	28
Upgrade Options	28
Microprocessor/L2 Cache Upgrades	28
Main Memory Expansion	29
Video-Memory Upgrade Option	29
Computer Service Information	29
Online Documentation	29
System Diagnostics	30
System-Board Service Data	30
System Board	30
System Board Jumpers	32
Interrupt Assignments	33
DMA Channel Assignments	34
Hard-Disk Drive Service Information	34
Hard-Disk Drive for the Low-Profile Computer	35
Hard-Disk Drive for the Midsize Computer	35
Hard-Disk Drive for the Mini Tower Computer	36
Hard-Disk Drive for the OptiPlex NX1 Computer	36
Power-Supply Service Data	36
Pin Assignments for the DC Power Connectors	37
DC Power Distribution	38
System Power Supply for the OptiPlex NX1 Computer	43
OptiPlex NX1 Pin Assignments for the DC Power Connectors	44
DC Power Distribution for the OptiPlex NX1 Computer	45
Technical Specifications	47
Basic Troubleshooting	55
Initial User Contact	55
External Visual Inspection	56
Observing the Boot Routine	57
Internal Visual Inspection	58
Eliminating Resource Conflicts	59
Running the System Diagnostics	59
Server-Based Diagnostics	60
Hard-Disk–Based Diagnostics (OptiPlex NX1 Systems Only)	61
Diskette-Based Diagnostics	62
Connecting an External Diskette Drive to the OptiPlex NX1 Computer	63
Running the Diskette-Based Diagnostics	64
Getting Help	64
Beep Codes and Error Messages	65
POST Beep Codes	65
System Error Messages	67
Removing and Replacing Parts on the Low-Profile Chassis	73
Recommended Tools	73
Precautionary Measures	73
Inside the Computer	74
Computer Cover	76
Eject, Power, and Reset Buttons	77
Front-Panel Inserts	78
Control Panel	79
Drives	80
Externally Accessible Drive Assemblies	80
3.5-Inch Diskette Drive Assembly	81
5.25-Inch Drive Assembly	82
Hard-Disk Drive Assembly	83
System Power Supply	84
Expansion Cards	85
Expansion-Card Cage	85
Expansion Card	86
Riser Board	87
System Board	88
System Board Components	89
DIMMs	89
Video Memory	90
Microprocessor	91
SEC Cartridge/Heat Sink Assembly	91
System Battery	92
Removing and Replacing Parts on the Midsize Chassis	95
Recommended Tools	95
Precautionary Measures	95
Inside the Computer	96
Optional Stand	98
Computer Cover	99
Eject, Power, and Reset Buttons	100
Front-Panel Inserts	101
Control Panel	102
Drives	103
Externally Accessible Drive Assemblies	103
3.5-Inch Diskette Drive Assembly	104
5.25-Inch Drive Assembly	105
Hard-Disk Drive Bracket	106
Hard-Disk Drive	107
System Power Supply	108
Expansion Cards	109
Expansion-Card Cage	109
Expansion Card	110
Riser Board	111
System Board	112
System Board Components	113
DIMMs	113
Video Memory	114
Microprocessor	115
SEC Cartridge/Heat Sink Assembly	115
System Battery	116
Removing and Replacing Parts on the Mini Tower Chassis	119
Recommended Tools	119
Precautionary Measures	119
Inside the Computer	120
Computer Cover	122
Front Bezel	123
Eject, Power, and Reset Buttons	124
Front-Panel Inserts	125
Control Panel	127
Drives	128
Externally Accessible Drive Assemblies	128
3.5-Inch Diskette Drive Assembly	129
5.25-Inch Drive Assembly	130
Hard-Disk Drive Bracket	132
Hard-Disk Drive	133
System Power Supply	134
Expansion Cards	135
Expansion-Card Cage	135
Expansion Card	136
Riser Board	137
System Board	138
System Board Components	139
DIMMs	139
Video Memory	140
Microprocessor	141
SEC Cartridge/Heat Sink Assembly	141
System Battery	142
Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis	145
Recommended Tools	145
Precautionary Measures	146
Inside the Computer	146
Optional Stand	147
Computer Cover	148
Control Panel	150
Hard-Disk Drive	151
System Power Supply	152
Expansion-Card Cage	153
Expansion Card	154
Riser Board	155
System Board	156
System Board Components	157
DIMMs	157
Video Memory	158
Microprocessor	159
SEC Cartridge/Heat Sink Assembly	159
System Battery	160
System Setup Program	163
System Setup Screens	164
Device List	168

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1-30

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)LJXUH±²´µµ³±±’&±3RZHU±’LVWULEXWLRQ±IRU±WKH±0LGVL]H±&RPSXWHU

–12 VDC

power

management

and NIC logic

+3.3 VDC

POWER1

system

power supply

RTC/

NVRAM

+3.3 VDC

+5 VDC

+5 VFP

+12 VDC

–12 VDC

+5 VDC

–5 VDC

+12 VDC

–12 VDC

+5 VDC

–5 VDC

PSON#

+5 VFP

+5 VDC

–5 VDC

+12 VDC

PWRGOOD

PSON#

+5 VFP

+5 VDC

–5 VDC

+12 VDC

–12 VDC

+3 VDC

keyboard

controller

+5 VDC

+12 VDC

–12 VDC

+12 VDC

3.5-inch

diskette drive

battery

ISA1

through

ISA3

PCI1

through

PCI3

MICROPROCESSOR

PANEL

KYBD

MOUSE

DIMM_A

DIMM_B

main

memory

sockets

FAN

RISER

internal

hard-disk drive

optional

drive

riser board

system board

optional

drive

internal

hard-disk drive

processor

core regulator

POWER2

core VCC +2.1 to +3.5 VDC

USB

+3.3 VDC

Some computers have an additional connector (P9) that may be used instead of P5 or P6.

fuses (2)

+5 VFP

DIMM_C

NOTE: +5 VFP is routed to

the integrated NIC logic on

the system board and to P1

on the riser board.