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Dell NX1 User's Manual

1. power supply and NIC logic NVRAM PCI1 P1 POWER1 through PC13 PSON P1 45 VEP 5 VDC 5 VDC 5 VDC 5 VDC ISA1 12 VDC 12 VDC 12 VDC 12 VDC through 12 VDC 12 VDC 12 VDC 12 VDC ISA3 P7 13 3 VDC POWER2 RISER intemal P2 hard disk drive internal P3 hard disk drive P4 3 5 inch diskette drive P5 optional drive P6 optional drive 12 VDC MICROPROCESSOR processor core regulator 13 3 VDC core VCC 42 1 to 3 5 VDC PANEL La WD xygp fuses 2 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 Figure 1 22 DC Power Distribution for the Midsize Computer 1 30 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual keyboard controller management and NIC logic PCI1 through PCI5 P1 PWRGOOD POWER1 PSON 5 VFP PSON 5 VFP P1 system 45 VDC 45 VDC 45 VDC ISA1 powersupply 5 VDC 5 VDC 5 VDC through 12 VDC 12 VDC 12 VDC 12 VDC ISA4 12 VDC 12 VDC 12 VDC 12 VDC P7 13 3 VDC POWER2 12 VDC
2. To install the video memory upgrade follow these steps 1 Remove the expansion card cage CAUTION To avoid possible damage to the video memory upgrade 1 socket and or video memory upgrade module the module is keyed and must be correctly positioned before inserting it into the socket CAUTION To avoid possible damage to the video memory upgrade module disconnect the DC power cable and the interface cable from the back of each hard disk drive installed in the hard disk drive bracket 2 Orient the video memory upgrade module as shown in Figure 5 20 Then carefully align the module s edge connector pins with the socket ensuring that the slot in the module mates with the socket key 3 Press the video memory upgrade module firmly into the socket and pivot the module downward until the module clicks into place X NOTE If you do not hear a sharp click when installing the video memory upgrade module remove the module and repeat steps 2 and 3 4 Replace the expansion card cage 5 Replace the computer cover and reconnect the AC power cable to the electrical outlet Press the power button on the computer to reboot the system X NOTE As the system boots it automatically detects the presence of the new video memory upgrade module and automatically changes the sys tem configuration information in the System Setup program 5 20 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 6 Enter the Sys
3. Drive 0 Auto EIDE Drive 9216 Drive 1 None Secondary Drive 0 Auto CD ROM Device Drive 1 None Reserved Memory None CPU Speed 400 MHz Num Lock On Chassis Intrusion Not Detected DAC Snoop On ACPI On Time 13 17 02 Date Mon April 1 1998 This category sets the time in 24 hour format hours minutes seconds for the internal clock calendar To change the value in a field enter a number or use the left or right arrow key Changes take effect immediately e Pentium II Processor 400 MHz Level 2 Cache 512 KB Integrated System Memory 32 MB SDRAM Video Memory 4 MB SGRAM Service Tag xxxxx Asset Tag XXXXX Tab Shift Tab change fields 4 change values Alt P next Esc exit Alt B reboot key functions system data Dell Computer Corporation www dell com Page 2 of 2 System OptiPlex GX1 400M Setup BIOS Version XXX Keyboard Errors Report This category sets whether keyboard System Password Not Enabled related error messages are reported Password Status Unlocked at system startup Boot Sequence Diskette First Setup Password Not Enabled Auto Power On Disabled 00 00 Power Management Disabled Wakeup On LAN On Integrated Devices Sound On NIC On Serial i a Pentium II Processor 400 MHz Serial Port 2 Auto Level 2 Cache 512 KB Integrated Parallel Port 378h System Memory 32 MB SDRAM Parallel Mode PS 2 Video Memory 4 MB SGRAM IDE Hard Disk Auto
4. Used By Available IRQ9 IRQ10 IRQ11 IRQ12 IRQ13 IRQ14 IRQ15 Available for use by an expansion card except in ACPI enabled configurations Available for use by an expansion card NIC default PCI IRQ Generated by keyboard controller to indicate that mouse s output buffer is full Generated by math coprocessor to indicate coprocessor error Generated by device connected to primary EIDE port to indicate that device requires service If the EIDE controller is disabled this line is available for other use Generated by device connected to secondary EIDE port to indicate that device requires service If the EIDE controller is disabled this line is available for other use fan ISA expansion card is configured for IRQ11 the optional NIC or PCI IRQ is assigned to another available IRQ line DMA Channel Assignments Table 1 3 DREQ Line Assignments DREQ Line Used By Available DREQO Available DREQ1 Available DREQ2 Generated by super I O controller to initiate DMA cycle for attached diskette drive DREQ3 Available DREQ4 Generated by bus controller chip to activate second DMA controller DREQ5 Available DREQ6 Available DREQ7 Available NOTE The built in audio controller NIC optional and video controllers are assigned available DMA channels automatically during system start up Hard Disk Drive Service Information The following subsections provide service related information about hard
5. 3 Press the video memory upgrade module firmly into the socket and pivot the module downward until the module clicks into place Z NOTE If you do not hear a sharp click when installing the video memory upgrade module remove the module and repeat steps 2 and 3 4 Replace the expansion card cage 5 Replace the computer cover and reconnect the AC power cable to the electrical outlet Press the power button on the computer to reboot the system Z NOTE As the system boots it automatically detects the presence of the new video memory upgrade module and automatically changes the sys tem configuration information in the System Setup program 4 18 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 6 Enter the System Setup program and confirm that 8 MB is shown in the Video Memory option If the total memory is listed incorrectly repeat steps 1 through 6 to reseat the video memory upgrade module and verify that the computer acknowledges the module 74 Run the system diagnostics Video Test Group to test the new video memory upgrade module Microprocessor To take advantage of future options in processor speed and functionality you can replace the microprocessor on your system board with any Dell supported microprocessor upgrade The microprocessor upgrade kit is shipped with an SEC cartridge heat sink assembly which includes the microprocessor micro processor heat sink and L2 cache memory modul
6. System Overview 1 35 Table 1 6 Technical Specifications continued Expansion Bus continued ISA expansion card connectors Low profile computers two one ISA connector and one PCI connector share an expansion card slot Midsize computers three one ISA connector and one PCI connector share an expansion card slot or two both share expansion card slots Mini tower computers four two ISA connectors share expansion card slots with PCI connectors OptiPlex NX1 computers none NIC NIC eti mas e DAKO integrated 3Com PCI 3C905B TX Wakeup On LAN NIC operating at 10 or 100 Mbps optional on GX1 and NX1 Memory Architecture 64 bit nonparity or 72 bit parity non interleaved on GX1 and NX1 72 bit parity noninterleaved on GX1p DIMM sockets three gold contacts DIMM capacities 32 MB nonparity SDRAM 32 64 and 128 MB parity SDRAM Standard RAM 32 MB GX1 and NX1 or 128 MB GX1p Maximum RAM 384 MB L2 cache memory 512 MB pipeline burst fourway set associative write back SRAM BIOS address FOOOOh ROM address C8000h Drives Externally accessible bays Low profile computers one 3 5 inch bay for a 3 5 inch diskette drive one 5 25 inch bay for a diskette tape or CD ROM drive Midsize computers one 3 5 inch bay for a 3 5 inch diskette drive two 5 25
7. 2 Figure 4 4 Front Panel Insert Removal To remove a front panel insert follow these steps L Lay the computer cover upside down on a flat work surface with the front of the cover facing you 2 From the front of the cover use your thumbs to push inward on the insert until it slides off the two posts To replace a 5 25 inch front panel insert position the two ring tabs over the posts on the inside of the bay opening and then press the ring tabs over the posts If necessary use a 1 4 inch nutdriver to help push on the ring tabs Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Control Panel a chassis O Mg o mounting screw 9 Ei S control panel cable Pp control panel mounting tab Figure 4 5 Control Panel Removal To remove the control panel follow these steps L Disconnect the control panel cable from the PANEL connector on the sys tem board 2 Fromthe inside of the chassis remove the mounting screw holding the control panel to the chassis 3 Remove the control panel from the chassis When you reinstall the control panel be sure to put the right side of the control panel behind the mounting tab Removing and Replacing Parts on the Low Profile Chassis 4 7 4 8 Drives Figure 4 6 shows an example of drive hardware that can be installed in the computer Refer to this figure when you perform any of the procedures in the following subsections d
8. DREQ Line Assignments 0 000 cee eee eee 1 22 OptiPlex GX1 GX1p DC Voltage Ranges 1 24 OptiPlex NX1 DC Voltage Ranges 1 32 Technical Specifications 0 cee ee ee 1 35 POST Beep Codes 0c cece cee ees 3 1 System Error M essages 0 cece ee ee 3 3 System Setup Options 5 ates eer tease a A 3 xiii xiv Read This First A prerequisite for using this manual to service Dell computer systems is a basic knowledge of IBM compatible PCs and prior training in IBM compatible PC troubleshooting techniques In addition to information provided in this manual and the User s Guide that came with the system Dell provides the Diagnostics and Troubleshooting Guide for troubleshooting procedures and instructions on using the Dell diagnostics to test the computer system Warnings Cautions and Notes Throughout this manual there may be blocks of text printed in bold type or in italic type These blocks are wamings cautions and notes and they are used as follows WARNING A WARNING indicates the potential for bodily harm and provides instructions for how to avoid the problem CAUTION A CAUTION indicates either potential damage to hard ware or loss of data and provides instructions for how to avoid the problem NOTE A NOTE provides helpful information about using the computer system CHAPTER 1 System Overview This manual contains field servicing information for the Dell
9. and L2 cache memory module You may also have to reseat or replace an SEC cartridge heat sink assembly during normal maintenance SEC Cartridge Heat Sink Assembly SEC cartridge release latches 2 heat sink gt heat sink clips 2 SEC cartridge guide bracket assembly metal standoffs 2 Figure 6 23 SEC Cartridge Heat Sink Removal Removing and Replacing Parts on the Mini Tower Chassis 6 23 To remove the SEC cartridge heat sink assembly follow these steps L Remove the system power supply WARNING The SEC cartridge heat sink assembly can get extremely a hot during system operations Be sure that the assembly has had suf ficient time to cool before touching it 2 Locate the SEC cartridge heat sink assembly 3 Disconnect the microprocessor fan connector from the 3 pin connector on the system board labeled FAN located between the SERIAL2 connec tor and the MONITOR connector 4 Release the two securing clips near the base of the heat sink from the metal standoffs 5 Locate and press inward on the SEC cartridge release latches located directly on top of the SEC cartridge adjacent to the heat sink assembly until the latches click 6 Lift the SEC cartridge heat sink assembly out of its guide bracket assembly connector on the system board NOTE When installing the SEC cartridge heat sink assembly press outward eX on the SEC cartridge release latches and then carefully orient the assem
10. 2 mounting screw control panel cable chassis tabs 3 Figure 7 5 Control Panel Removal To remove the control panel follow these steps L Remove the power supply 2 Disconnect the control panel cable from the PANEL connector on the sys tem board 3 From inside the chassis remove the mounting screw securing the control panel to the chassis 4 Remove the control panel from the chassis When you reinstall the control panel place the control panel between the tabs in the chassis Before reinstalling the power supply be sure to route the con trol panel cable under the retention tabs on the chassis wall 7 6 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Hard Disk Drive hard disk drive expansion card cage hard disk drive mounting screws 4 Figure 7 6 Hard Disk Drive Removal To remove a hard disk drive follow these steps L Disconnect the DC power cable and the EIDE cable from the back of the drive Disconnect any external cables from the expansion card if one is installed Remove the expansion card cage Remove the expansion card if one is installed u BA WwW N Remove the four hard disk drive mounting screws that attach the hard disk drive to the expansion card cage Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7 7 System Power Supply power ee or supply EIDE cable board DC power power supply cables 2 S
11. 2 riser board slots 2 a riser board mounting screw mp Figure 7 10 Riser Board Removal To remove the riser board follow these steps L Remove the expansion card cage 2 Remove the expansion card if one is installed 3 Lay the expansion card cage on a flat work surface with the riser board facing up 4 Remove the riserboard mounting screw 5 Slide the riser board to the side as shown in Figure 7 10 and then remove the riser board from the expansion card cage When you replace the riser board be sure that the two tabs on the expansion card cage engage the riser board slots Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7 11 System Board system board back of computer slots 5 tabs 5 Figure 7 11 System Board Removal CAUTION Do not use the microprocessor heat sink as a handle 1 when removing or installing the system board To remove the system board follow these steps 1 Disconnect all cables from their connectors at the back of the computer 2 Remove the expansion card cage 3 Disconnect all cables from the system board 4 Remove the screw that secures the system board to the bottom of the chassis Uu Slide the system board toward the front of the chassis until it stops 6 Carefully lift the system board out of the chassis be sure to lift evenly and not twist the system board X NOTES If you are replacing a system board remove the
12. 2 5 Running the System Diagnostics aa 2 5 Server Based Diagnostics 0 cee eee 2 6 Hard Disk Based Diagnostics OptiPlex NX1 Systems Only 2 7 Diskette Based Diagnostics llle 2 8 Connecting an External Diskette Drive to the OptiPlex NX1 Computer aa sexs oh eR EEG Soest es 2 9 Running the Diskette Based Diagnostics 2 10 Getting Help paaa sepu eevee NANANA BAG NANA 2 10 Beep Codes and Error Messages 3 1 POST Beep Godes ciant tis ere Lar radi hele co Pea wee the tas wi ee ac 3 1 System Error Messages lt aNG RITE Ta ERI ERE AW REY 3 3 Removing and Replacing Parts on the Low Profile Chassis 4 1 Recommended Tools 26 ascii em Ges eka es Rua exa cp 4 1 Precautionary Measures cia ERI bU I esas AN WA SEE 4 1 Chapter 5 Inside the Computer 0 0 ccc cee eee eee eens 4 2 Computer COVSr ssri Sans E eee AULA elo ap IP FUB TN tenet b US a d te 4 4 Eject Power and Reset Buttons 0 eens 4 5 Front Panel Inserts RET C Tr 4 6 Control Panel a6 BARA mm mesa a E SU RI NER Mun qua AUT ta 4 7 BI c UN LR 4 8 Externally Accessible Drive Assemblies 0 la 4 8 3 5 Inch Diskette Drive Assembly 0 0000 e eens 4 9 5 25 Inch Drive Assembly 0 0 ccc 4 10 Hard Disk Drive Assembly anuna cee eee ee 4 11 System Power SUppIy 002 eee ees 4 12 Expansion Gets inesi ea east tet quoc tn edes Eg Ng
13. 6 Internal View of the OptiPlex NX1 Chassis Advanced Expansion Features The OptiPlex GX1 GX1p systems contain advanced expansion subsystems that can support a mixture of traditional ISA expansion cards called legacy cards Plug and Play ISA expansion cards and PCI expansion cards For non Plug and Play operating system environments an ISA Configuration Utility ICU included with the computer provides a means of avoiding resource conflicts Chapter 3 Using the ISA Configuration Utility in the Ref erence and Installation Guide describes the ICU and provides instructions for using it to configure the computer In the Microsoft Windows 98 operating system the functions provided by the ICU are handled by the Device Manager which can be accessed by double clicking the System icon in the Control Panel See your Windows 98 documentation for instructions on using the Device M anager to manage resources and resolve conflicts System Overview 1 13 OptiPlex NX1 Computer s Expansion Card Slot The OptiPlex NX1 computer has one PCI expansion card connector on the riser board see Figure 1 7 The computer automatically assigns any required mem ory space IRQ lines and DMA channels to an installed PCI expansion card during system start up The Wakeup On LAN power connector on the riser board supports an optional NIC expansion card with Wakeup On LAN capabil ity The power LED lights up when DC power is applied to the riser board
14. 7 7 Figure 7 8 Figure 7 9 Figure 7 10 Figure 7 11 Figure 7 12 Figure 7 13 Figure 7 14 Figure 7 15 Figure 7 16 Figure A 1 Figure A 2 Table 1 1 Table 1 2 Table 1 3 Table 1 4 Table 1 5 Table 1 6 Table 3 1 Table 3 2 Table A 1 Installing a Video M emory Upgrade Module 6 22 SEC Cartridge Heat Sink Removal 6 23 System Battery Installation cece eese 6 24 Internal View of the OptiPlex NX1 Computer 7 3 Optional Stand Removal 0 a 7 3 Computer Cover Removal aaa 74 Service Access LOCK 26e aute Eres here DR eee ne RAMS 7 5 Control Panel Removal 1 0 ccc eee ees 7 6 Hard Disk Drive Removal 0 cece cece eens 7 7 System Power Supply Removal 0 0 00 7 8 Expansion Card Cage Removal 0 0 eee ee 7 9 Expansion Card Removal eee e eee enue 7 10 Riser Board Removal 00sec eee eee eee ees 7 11 System Board Removal llle 7 12 DIMM Removal sad vues wb Arete NG WADA RAYA 7 13 DIMM Installation ccc eee ees 7 13 Installing a Video M emory Upgrade Module 7 14 SEC Cartridge Heat Sink Removal 7 15 System Battery Installation 0000008 7 16 System Setup Screens cee ee ee ees A 2 Sample Device List Screen 0 cee ees A 7 System Board J umper Descriptions 1 20 Interrupt Assignments 20 cee eee eee 1 21
15. 75 Hz minimum 8 MB video memory required 1600 x 1200 16 bpp 65535 colors 75 Hz minimum 8 MB video memory required System Overview 1 37 Table 1 6 Technical Specifications continued Ports Externally accessible Serial DTE two 9 pin connectors 16550 compatible Parallel eh EE NG one 25 hole connector bidirectional MOBO LL ei turista one 15 hole connector PS 2 style keyboard pin mini DIN PS 2 compatible MOUSE slav vira 6 pin mini DIN NIG ua DEED RJ 45 connector optional USB acai Naan maana two USB host connectors Audio line in 2 0 V rms maximum stereo Audio microphone 89 MV rms maximum mono Audio line out 14 V ms maximum stereo at 32 ohms minimum impedance Internally accessible EIDE hard disk drive two 40 pin connectors on PCI local bus Diskette drive 34 pin connector CD ROM drive audio interface 4 pin connector ATI Multimedia Channel AMC 40 pin connector CDI 254 2 sve regatta 4 pin connector Key Combinations lt Cti gt lt Alt gt lt Del gt restarts reboots the system a a APA starts System Setup program during the POST only lt Ctrl gt lt Alt gt lt gt toggles microprocessor speeds on 101 key keyboard in MS DOS real mode only lt Ctrl gt lt Alt gt lt gt toggles microprocessor speeds on 102 key keyboard in MS DOS real mode only 1 38
16. 914 6 m 3000 ft the maximum operating temperature is reduced System Overview 1 41 1 42 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual CHAPTER 2 Basic Troubleshooting This chapter provides basic troubleshooting procedures applicable to all systems of the Dell OptiPlex GX1 GX1p M anaged PC and OptiPlex NX1 Net PC families A brief explanation of how to load and start the system diagnos tics is also provided at the end of the chapter Dell recommends that you perform the following procedures in the order they are presented in this man ual Chapter 3 Beep Codes and Error Messages also contains information to assist you in diagnosing computer failures that occur during the POST Initial User Contact When you first contact a user who has a problem ask the user to describe the problem and the conditions under which it occurs In particular was the user installing new hardware or software when the failure occurred A verbal description can often indicate the cause of a problem or indicate the appropri ate troubleshooting procedure to use After the user describes the problem follow these steps 1 Ask the user to back up any data on the hard disk drive if the system s con dition permits See Maintaining the System in the online System User s Guide for infor mation about backing up data 2 Ask the user to try to duplicate the problem by repeating the operations he or she was per
17. BAT ae Ag 4 13 Expansion Card Cage tetas 4 13 Expansion Card osos ERR bee x V usd EXE ha 4 14 PISCE Board acit Sattar koh eer tap bent ud a op ir tend 4 15 System BOIFA RR CT C AA ng anG ae yeas 4 16 System Board Components 0 00 c eee eee eee 4 17 DIM MSG Khan rs t b ica d te tk ne Daa eh ee eee BAG pA A 4 17 Video MEMO oec Rte a So e Sad a RAO Ss aie Ba PANA Se Aes 4 18 MICMOPIOGESSOM ornen PEB NAKADAGAN NGA Pe ue eked TEE RE 4 19 SEC Cartridge Heat Sink Assembly 00 eee eee ee 4 19 System Battery euenit ea PARAK aida Dane Cae DAN BRA d 4 20 Removing and Replacing Parts on the Midsize Chassis o 0 0 Onl Recommended TO0ls 153 ah ein AA AA ANG Yor oe eee uS 5 1 Precautionary Measures 000 ee ee 5 1 Inside the Computer saab Sa E naaa ma a Meet Ge NAL PNG RE 5 2 Optional SEerides eter Boil ee eres oe See hh tts Ree cu EIS oe 5 4 Computer Cover 3 04 xci era a elu m NN ae en XR YS RE dd 5 5 Eject Power and Reset Buttons 0 0 0 eere 5 6 Front Panel Inserts a iGo via vue RR ec a af a e a 5 7 Control Panel edu siege et he E RR ee eeweest daa Naan NERA 5 8 DIVES ss Aer ka Soe uud ser Aude ern eed I S Kaha oe 5 9 Externally Accessible Drive Assemblies 0 0 aaa 5 9 3 5 Inch Diskette Drive Assembly 0000 000 ee ae 5 10 5 254nch Drive Assembly 0 00 cece eere 5 11 Hard Disk Drive Bracket 00 a 5 12 Hard Disk Drive i oo oS iw
18. Midsize Computer Option 2 1 15 Figure 1 11 Riser Board for the Mini Tower Computer 1 16 Figure 1 12 System Board Components New 1 18 Figure 1 13 System Board Components Old Aa 1 19 Figure 1 14 System Board umpers 000 cee eee eee 1 20 Figure 1 15 Figure 1 16 Figure 1 17 Figure 1 18 Figure 1 19 Figure 1 20 Figure 1 21 Figure 1 22 Figure 1 23 Figure 1 24 Figure 1 25 Figure 1 26 Figure 1 27 Figure 1 28 Figure 2 1 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Figure 4 10 Figure 4 11 Figure 4 12 Figure 4 13 Figure 4 14 Figure 4 15 Figure 4 16 Figure 4 17 Figure 4 18 Figure 4 19 Figure 5 1 Computer Orientation Information DC Power Connector P1 0n 1 25 DC Power Connectors P2 Midsize and Mini Tower Chassis P3 P4 P5 P6 and P9 All OptiPlex GX1 GX1p Chassis isses DC Power Connectors P2 Low Profile Chassis and P7 All OptiPlex GX1 GX1p Chassis 1 26 DC Power Cables for the Low Profile Computer 1 27 DC Power Distribution for the Low Profile Computer 1 28 DC Power Cables for the Midsize and Mini Tower Computers 00000 cee eee eee 1 29 DC Power Distribution for the Midsize Computer 1 30 DC Power Distribution for the Mini Tower Computer 1 31 DC
19. Net PC Systems Service Manual Main Memory Expansion The three DIMM sockets on the system board can accommodate combina tions of 32 64 and 128 MB DIMMs up to a total memory capacity of 384 MB Main memory can have either 72 bit parity ECC DIM Ms or 64 bit nonparity DIM Ms Video Memory Upgrade Option On the OptiPlex GX1 and OptiPlex NX1 systems you can upgrade video mem ory from 4 to 8 MB by installing an optional video memory upgrade module in the video memory upgrade socket on the system board Adding video memory increases the system s video performance and provides additional modes for high resolution expanded color applications The OptiPlex GX1p system comes with 8 MB standard NOTE See the online System User s Guide or Chapter 6 Installing System Board Options in the Reference and Installation Guide for additional upgrade information Computer Service Information The following subsections provide service related information about the com puter Unless otherwise specified the information applies to all chassis configurations Online Documentation Dell OptiPlex GX1 GX1p computers are shipped with an online System User s Guide located in the Dell Accessories folder that provides additional hard ware and software installation configuration information and Dell contact information System Overview 1 17 System Diagnostics Serverbased and diskette based diagnostics are available to aid in troubleshoot
20. Online Documentation rx banag PUGON dee wee sexe oda 1 17 System Diagnostics we as ee ee Pees DL ue hana eet 1 18 Chapter 2 Chapter 3 Chapter 4 System Board Service Data 0 ccc eee eens 1 18 System BOard unius me ia du bU NBA NON Pee Pe oda 1 18 System Board J UMperS sce EA x Ba KAG a EI E 1 20 Interrupt Assignments eee 1 21 DMA Channel Assignments 0000 c eee eee eens 1 22 Hard Disk Drive Service Information 0 a 1 22 Hard Disk Drive for the Low Profile Computer 1 23 Hard Disk Drive for the Midsize Computer 1 23 Hard Disk Drive for the Mini Tower Computer 1 24 Hard Disk Drive for the OptiPlex NX1 Computer 1 24 Power Supply Service Data ec ee eee 1 24 Pin Assignments for the DC Power Connectors 1 25 DC Power Distribution s osaa cc ees 1 26 System Power Supply for the OptiPlex NX1 Computer 1 31 OptiPlex NX1 Pin Assignments for the DC Power Connectors 1 32 DC Power Distribution for the OptiPlex NX1 Computer 1 33 Technical Specifications iie as Rma E D ERR 3A oe KA 1 35 Basic Troubleshooting 2 1 Initial User Contact iuit mana odo pala Viele se eie teu Puedo SEN 2 1 External Visual Inspection ee 2 2 Observing the Boot Routine oe key eae a wea eee ARAY 2 3 Internal Visual Inspection nasasa aaua 2 4 Eliminating Resource Conflicts llle
21. OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC family of computers The Dell Opti Plex GX1 GX1p and OptiPlex NX1 systems are high speed 266 333 350 400 or 450 M Hz upgradable desktop computers built around high performance Intel Pentium II microprocessors with MM X technology The OptiPlex GX1p systems are available only with 400 M Hz or 450 M Hz processors The OptiPlex GX1 GX1p and NX1 systems use a standard system board with optional integrated NIC controller with Wakeup On LAN capability The OptiPlex GX1 systems are available in three different chassis configura tions low profile desktop midsize desktop and mini tower See Figure 1 1 The OptiPlex GX1p is available only in the midsize desktop and mini tower chassis The OptiPlex NX1 system is available only in the OptiPlex NX1 chassis see Figure 1 1 Chapters 1 through 3 and Appendix A contain information that applies to all models of the OptiPlex GX1 GX1p and OptiPlex NX1 families Chapters 4 5 6 and 7 are chassis specific System Overview 11 Mini Tower Chassis OptiPlex NX1 Chassis Figure 1 1 Chassis Configurations Chassis Differences The four different chassis configurations differ primarily in the following expan sion features e Number of expansion slots available for PCIASA expansion cards Number of available intemal drive bays for EIDE SCSI drives Number of available external drive bays for diskette CD ROM or tape d
22. Pentium Il microprocessor also uses a technique called single instruction multiple data SIM D which permits processing data elements in parallel for additional sys tem performance enhancement The microprocessor is physically located in a single edge contact SEC cartridge heat sink assembly on the system board for ease of upgrading when faster processors are available Contact Dell Computer Corporation for informa tion about Dell supported microprocessor upgrades Secondary L2 Cache For additional performance the OptiPlex GX1 GX1p and OptiPlex NX1 systems employ a secondary cache memory subsystem with a cache memory control ler and 512 KB of pipeline burst SRAM cache memory The L2 cache SRAM is located in the SEC cartridge heat sink assembly on the system board System Overview 1 3 Main Memory Main memory for the OptiPlex GX1 and OptiPlex NX1 systems ranges from a minimum of 32 MB to amaximum of 384 MB Main memory for the OptiPlex GXI1p system ranges from a minimum of 128 MB to a maximum of 384 MB All main memory for the OptiPlex GX1 and OptiPlex NX1 systems is implemented using high speed error checking and correction ECC and non ECC DIM Ms All main memory for the OptiPlex GX1p system is implemented using high speed ECC DIMMs One to three DIM Ms ranging in memory capacity sizes from 32 to 128 MB may be used to provide a maximum memory capacity of 384 MB Upgradable BIOS in Flash Memory The system BIOS is implemented
23. Remove the screw that secures the system board to the bottom of the chassis ui Slide the system board toward the front of the chassis until it stops 6 Carefully lift the system board out of the chassis be sure to lift evenly and not twist the system board NOTES If you are replacing the system board remove all DIMMs the TA video memory upgrade module if present the single edge contact SEC cartridge heat sink assembly and the guide bracket assembly from the old sys tem board and install them on the replacement board Also set the jumpers on the new system board so that they are identical to those on the old board unless a microprocessor upgrade is being installed If the original system board has a NIC connector ensure that the replacement board has a NIC connector When you reinstall the system board before you slide the system board back to lock it in position push down near each slot to engage the grounding clip onto its corresponding tab Push evenly on both sides of the system board as you slide it into position do not twist the system board 6 20 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual System Board Components The following subsections contain procedures for removing replacing system board components see Figures 1 12 and 1 13 DIMMs To remove a DIMM from one of the three DIMM sockets follow these steps L Remove the system power supply 2 Locate the three D
24. Service Tag xxxxx Diskette Auto Asset Tag XXXXX Speaker On Tab Shift Tab change fields lt gt change values Alt P next Esc exit Alt B reboot Figure A 1 System Setup Screens Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service M anual Table A 1 System Setup Options Option Function Time Resets time on computer s internal clock Date Resets date on computer s internal calendar Diskette Drive A Diskette Drive B Identifies type of diskette drives installed Option choices always match physical loca tions of drives in computer Tape drives are not reflected in these options NOTE For OptiPlex NX1 chassis a single dis kette drive can be used for service purposes only Drives Primary Secondary Identifies drives attached to the IDE1 and IDE2 connectors on system board Each EIDE con nector supports two EIDE drives Drive O and Drive 1 For EIDE hard disk drives the system provides an automatic drive type detect feature To use this feature highlight the appropriate Drive option and type a for autornatic If none of the supported drive types matches the parameters of the new drive enter parameters directly To do so highlight the appropriate Drive option Drive O or Drive 1 and type u to display User1 Press Tab to highlight each of the parameter fields in suc cession and enter the appropriate number for each field NOTES F
25. VDC 1140 to 12 60 VDC 3 0 A low profile computers 6 0 A midsize and mini tower computers 1 The combined load on the 5 VDC and 3 3 VDC outputs should not exceed 105 W on the low profile computers or 140 W on the midsize mini tower computers Withstands surges of up to 110 A to support disk start up operations 1 24 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Table 1 4 OptiPlex GX1 GX1 p DC Voltage Ranges continued Voltage Range Maximum Output Current 12 VDC 10 80 to 13 20 VDC 0 3 A low profile computers 0 3 A midsize and mini tower computers 5 VDC 4 50 to 5 50 VDC 0 3 A low profile computers 0 3 A midsize and mini tower computers 5 VFP3 4 75 to 5 25 VDC 10 mA 3 VFP volts flea power sometimes called standby power Pin Assignments for the DC Power Connectors The powersupply output voltages can be measured at the back wire side of the connectors without disconnecting them Figures 1 15 through 1 17 show the wire side of the connectors 5 VDC white 5 VDC red common black 5 VDC red common black 5 VDC red common black TESC brown PSON gray p 5 VDC red 11 12 13 14 15 16 17 18 19 20 pg 0000 a a a a a DO00DDDDDO 1 2 3 4 5 6 7 8 9 10 5 VDC red L common black common black common black 5 VDC red 12 VDC blue common black 12 VDC yellow PWRGOOD orange
26. Video Memory notch video memory video memory upgrade socket upgrade module Figure 7 14 Installing a Video Memory Upgrade Module You can upgrade video memory from 4 to 8 MB by installing a video memory upgrade module in the video memory upgrade socket on the system board Adding additional video memory increases the system s video performance and provides additional modes for high resolution expanded color applications To install the video memory upgrade follow these steps 1 Remove the expansion card cage CAUTION To avoid possible damage to the video memory upgrade 1 socket and or video memory upgrade module the module is keyed and must be correctly positioned before inserting it into the socket 2 Orient the video memory upgrade module as shown in Figure 7 14 Then carefully align the module s edge connector pins with the socket ensuring that the slot in the module mates with the socket key 3 Press the video memory upgrade module firmly into the socket and pivot the module downward until the module clicks into place A NOTE If you do not hear a sharp click when installing the video memory upgrade module remove the module and repeat steps 2 and 3 4 Replace the expansion card cage 5 Replace the computer cover and reconnect the AC power cable to the elec trical outlet Press the power button on the computer to reboot the system Z NOTE As the system boots it automatically detects the presence of the new
27. an unpainted metal sur face such as the padlock loop on the back of the chassis If a wrist grounding strap is not available periodically touch an unpainted metal surface on the back of the computer to discharge any static charge from your body Avoid touching components and contacts on a card and avoid touching pins on a chip to prevent static electricity damage Inside the Computer Figure 5 1 shows an internal view of the midsize computer and identifies major components for orientation Refer to this illustration as needed when per forming the component removal replacement procedures in this chapter 5 2 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 3 5 inch diskette drive extemal drive bays diskette tape drive interface cable hard disk drive bracket power supply hard disk drive interface cable system board expansion card cage Figure 5 1 Internal View of the Midsize Computer Removing and Replacing Parts on the Midsize Chassis 5 3 Optional Stand optional stand screw Figure 5 2 Optional Stand Removal To remove the optional stand follow these steps 1 Place the right side of the computer on a flat work surface 2 Unscrew the optional stand screw Use your fingers or a wide flat blade screwdriver to unscrew the optional stand screw 3 Pull the optional stand away from the computer Disengage the three orientation nubs that position and help h
28. control panel ont ofrom connector PANEL Figure 1 13 System Board Components Old System Overview 1 19 System Board Jumpers The system board jumpers are located in the same comer on both the old and new system board 500MHZ E3 jumpered unjumpered Figure 1 14 System Board Jumpers Table 1 1 System Board Jumper Descriptions Jumper Description Settings 500M HZ Microprocessor Install jumper if the microprocessor s speed intemal speed is 500 MHz otherwise the jumper should not be installed 450M HZ Microprocessor Install jumper if the microprocessor s speed intemal speed is 450 MHz otherwise the jumper should not be installed 400M HZ Microprocessor Install jumper if the microprocessor s speed intemal speed is 400 M Hz otherwise the jumper should not be installed One set of speed jumpers must have a jumper plug installed otherwise the system defaults to 350 MHz 1 20 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Table 1 1 System Board Jumper Descriptions continued Jumper Description Settings 350M HZ Microprocessor Install jumper if the microprocessor s speed internal speed is 350 MHz otherwise the jumper should not be installed 333M HZ Microprocessor Install jumper if the microprocessor s speed intemal speed is 333 MHz otherwise the jumper should not be installed 300M HZ Microprocessor Reserved J umper not insta
29. disk drive options for the OptiPlex GX1 GX1p and OptiPlex NX1 computers Z NOTE Throughout this manual references to component locations assume the chassis orientations illustrated in Figure 1 15 1 22 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual right side front front Low Profile Chassis right side front Mini Tower Chassis Midsize Chassis Figure 1 15 Computer Orientation Information Hard Disk Drive for the Low Profile Computer The hard disk drive assembly consisting of the hard disk drive and the hard disk drive bracket is located inside the chassis at the left front of the computer and is attached to the bottom of the chassis One 1 inch high EIDE or SCSI hard disk drive can be mounted on the hard disk drive bracket Hard Disk Drive for the Midsize Computer The hard disk drive bracket is located next to the extemally accessible drive bays at the front of the computer The hard disk drive bracket can contain either one or two 1 inch high EIDE or SCSI hard disk drives or one 1 inch high EIDE or SCSI hard disk drive and one 1 6 inch high EIDE or SCSI hard disk drive System Overview 1 23 Hard Disk Drive for the Mini Tower Computer The hard disk drive bracket is located beneath the extemally accessible drive bays at the front of the computer The hard disk drive bracket can contain either one or two 1
30. drives installed in the externally accessible drive bays 6 10 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 3 5 Inch Diskette Drive Assembly retaining tab release button Figure 6 9 3 5 Inch Diskette Drive Assembly Removal To remove a 3 5 inch diskette drive assembly follow these steps l Disconnect the DC power cable and the interface cable from the back of the 3 5 inch diskette drive Press the retaining tab release button and pull the drive assembly forward to remove it Remove the drive mounting screw from the left side of the drive and remove the drive from the bracket see Figure 6 10 Removing and Replacing Parts on the Mini Tower Chassis 6 11 drive mounting screw hooks 2 Figure 6 10 3 5 Inch Diskette Drive Bracket When you replace the 3 5 inch diskette drive be sure that the two hooks on the right side of the bracket engage the mounting holes in the side of the 3 5 inch diskette drive 5 25 Inch Drive Assembly retaining tabs 2 Figure 6 11 5 25 Inch Drive Assembly Removal 6 12 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual To remove a 5 25 inch drive assembly from the middle or lower drive bay fol low these steps L Disconnect the DC power cable and the interface cable from the back of the drive 2 Press in on the two retaining tabs one on each side of the drive and slide the drive assembly forward to
31. eject button MA SQ power button reset button Figure 6 4 Eject Power and Reset Button Removal To remove the eject power and reset buttons follow these steps 1 Lay the front bezel on a flat work surface with the back of the bezel facing up 2 To remove the 3 5 inch diskette drive eject button pull gently on the plastic part of the button until it comes free 3 To remove the power button or the reset button use a small screwdriver and push in on the two or three plastic clips that hold the button to the bezel When these clips are released the button comes free from the bezel 6 6 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Front Panel Inserts front bezel dd NG ID 5 25 inch front panel insert ring tabs 2 Figure 6 5 5 25 Inch Front Panel Insert Removal To remove a 5 25 inch front panel insert follow these steps 1 Hold the bezel with the front facing you 2 From the front of the bezel use your thumbs to press inward on the insert until it slides off the two posts To replace a 5 25 inch front panel insert position the two ring tabs over the posts on the inside of the bay opening and then press the ring tabs over the posts Removing and Replacing Parts on the Mini Tower Chassis 6 7 eject button mechanism Figure 6 6 3 5 Inch Front Panel Insert Removal To remove a 3 5 inch front panel insert follow these steps 1 Hold the bezel with th
32. in flash ROM which allows for easy BIOS upgrades using diskette files or files downloaded from Dell s home page on the World Wide Web www dell com The BIOS also incorporates the POST diagnostics which tests the system each time the system is started EIDE Subsystem The EIDE subsystem implemented on the system board provides two M ode 4 DMA bus mastered EIDE interfaces each of which can support up to two EIDE devices for example CD ROM drive hard disk drive and so on The EIDE controller attaches to the high speed PCI local bus The primary EIDE interface IDE1 provides support for up to two high performance EIDE devices The computer s boot drive should be connected to the primary EIDE interface The secondary EIDE interface IDE2 also provides support for up to two high performance EIDE devices typically EIDE tape drives or CD ROM drives NOTES Any externally accessible drive bays at the front of the computer are AL normally used for diskette CD ROM and or tape drives Hard disk drives should be installed in the internal hard disk drive positions described in Hard Disk Drive Service Information found later in this chapter The OptiPlex NX1 system supports only one hard disk drive and optionally one external diskette drive for running the diskette based diagnostics as described in Chapter 2 Basic Troubleshooting SMART Technology As a standard feature OptiPlex GX1 GX1p and OptiPlex NX1 systems are eq
33. not appear proceed to the next section Getting Help The diskette based diagnostics consists of the same test groups described in Hard Disk Based Diagnostics OptiPlex NX1 Systems Only found earlier in this chapter For a complete description of the diskette based diagnostics see Diskette Based Diagnostics in the online Network Administrator s Guide or online System User s Guide Getting Help If none of the troubleshooting procedures in this chapter or the tests in the serverbased hard disk based or diskette based diagnostics reveals the source of the problem or leads to the proper troubleshooting steps for deter mining the source of the problem call Dell for technical assistance For instructions see Contacting Dell in the online Network Administrator s Guide or online System User s Guide 2 10 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual CHAPTER 3 Beep Codes and Error Messages This chapter describes the beep codes and error messages that are common to all members of the Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC family of computers These error messages can occur during the POST or in the case of some failures during normal system operation The tables in this chapter list faults that can cause a beep code or system error message to occur and the probable causes of the fault in each case If a faulty system does not emit beep codes or display system e
34. retaining screw card mounting bracket at 7A gt riser board Figure 4 12 Expansion Card Removal To remove an expansion card follow these steps L 2 3 4 Disconnect any extemal cables from the expansion card being removed Remove the expansion card cage Remove the retaining screw from the card mounting bracket Grasp the expansion card by its corners and carefully remove it from the expansion card connector Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Riser Board riser board mounting screws 2 riser board Figure 4 13 Riser Board Removal To remove the riser board follow these steps L Remove the expansion card cage and all expansion cards 2 Lay the expansion card cage on a flat work surface with the riser board facing up 3 Remove the two riser board mounting screws 4 Lift the riser board away from the expansion card cage When you replace the riser board be sure that the alignment feature on the expansion card cage engages with the alignment slot Removing and Replacing Parts on the Low Profile Chassis 4 15 4 16 System Board Screw slots 5 tabs 5 Figure 4 14 System Board Removal To remove the system board follow these steps l Disconnect all cables from their connectors at the back of the computer 2 Remove the expansion card cage 3 Disconnect all cables from the system board 4 Remove the screw th
35. retention tab SEM pa hard disk drive VIAN DC power cable cable tabs 2 chassis tabs 2 AC power receptacle screw Figure 7 7 System Power Supply Removal To remove the system power supply follow these steps L Disconnect the AC power cable from the back of the computer 2 Disconnect the DC power cables from the system board and the hard disk drive 3 Remove the expansion card cage 4 Remove the EIDE cable from the tabs on the power supply 5 Remove the screw securing the AC power receptacle to the back of the chassis and lift the connector away from the chassis 6 Rotate the top of the system power supply back until it clears the retention tab then lift the power supply from the chassis When you reinstall the system power supply place it in front of the two tabs on the bottom of the chassis Then rotate the power supply toward the front of the chassis until the retention tab snaps into place Route the EIDE cable under the cable tabs on the power supply before reinstalling the expansion card cage 7 8 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Expansion Card Cage The computer has a removable expansion card cage The expansion card cage contains the hard disk drive the riser board and any installed expansion card You must remove the expansion card cage to remove or install the hard disk drive an expansion card or the riser board expansion card cage sec
36. the bracket When you replace the 3 5 inch diskette drive be sure that the two hooks on the right side of the bracket engage the mounting holes in the side of the 3 5 inch diskette drive Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 5 25 Inch Drive Assembly retaining tabs 2 Figure 5 9 5 25 Inch Drive Assembly Removal To remove a 5 25 inch drive assembly from the middle or lower drive bay fol low these steps L Disconnect the DC power cable and the interface cable from the back of the drive 2 Press in on the two retaining tabs one on each side of the drive and slide the drive assembly forward to remove it 3 Remove the four screws attaching the 5 25 inch drive to the mounting plate and lift the drive out of the mounting plate see Figure 5 10 Align the front of the drive flush with the tab at the front of the 5 25 inch drive mounting plate drive mounting screws 4 Figure 5 10 5 25 Inch Drive Removal When you replace the 5 25 inch drive align the front of the drive flush with the tab at the front of the mounting plate Insert the four screws and tighten them in the order stamped on the bottom of the 5 25 inch drive mounting plate Removing and Replacing Parts on the Midsize Chassis 5 11 Hard Disk Drive Bracket low rbace tan hard disk drive bracket Figure 5 11 Hard Disk Drive Bracket Removal To remove the hard disk drive bracket fol
37. the computer cover You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided Recommended Tools Most of the procedures in this chapter require the use of one or more of the following tools Small flat blade screwdriver Wide flat blade screwdriver 1 and 2 Phillips screwdrivers e 1 4 inch nutdriver Tweezers or long nose pliers Also use a wrist grounding strap as explained in the next section Precaution ary Measures Precautionary Measures Before you perform any of the procedures in this chapter take a few moments to read the following waming for your personal safety and to prevent damage to the system from ESD Removing and Replacing Parts on the M idsize Chassis 5 1 A WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT Before you start to work on the system perform the following steps in the sequence listed L Tum off the computer and any attached peripherals 2 Disconnect the computer and any attached peripherals from their power sources to reduce the potential for personal injury Also disconnect any telephone or telecommunication lines from the computer 3 Wait 5 seconds after powering down the computer before disconnecting a peripheral from the computer or removing a compo nent from the computer s system board to avoid possible damage to the system board Wear a wrist grounding strap and clip it to
38. to 25 pounds of force to mate the SEC cartridge with its connector The SEC cartridge release latches will click into the locked posi tion as the assembly is seated System Battery battery BATTERY socket Figure 4 19 System Battery Installation To remove the system battery follow these steps Ll If possible boot the system and enter the System Setup program Then record important system configuration information see Appendix A Sys tem Setup Program for details 4 20 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 2 Turn off power to all peripherals and disconnect the AC power cable from its electrical outlet 3 Remove the computer cover 4 Remove the expansion card cage and locate the battery in the front right comer of the system board adjacent to the DIMM connectors CAUTION If you pry out the battery with a blunt object be careful not to touch the system board with the object Ensure that the object is inserted between the battery and the socket before attempting to pry out the battery Otherwise you may damage the system board by prying off the socket or by breaking traces on the system board 5 Remove the battery by carefully prying it out of its socket with your fingers or with a blunt nonconducting object such as a plastic screwdriver There is a danger of the new battery exploding if it is incorrectly installed When you replace the system battery orient
39. 5 VFP purple 1 Pin 11 PSON should measure between 4 and 5 VDC except when the power button on the front panel is pressed taking PSON to its active low state Pin 19 Thermal fan speed control TFSC is a powersupply input signal used to control the powersupply fan speed 3 Pin 5 PWRGOOD should measure between 4 and 5 VDC when the power supply is on and operating to indicate that all powersupply output voltages are within ranges specified in Table 1 4 Figure 1 16 DC Power Connector P1 System Overview 1 25 a N P e TA 1 2 3 4 2a t H2 voc yellow _ 5 VDC red common black common black common black 45 VDC red common black 12 VDC yellow Figure 1 17 DC Power Connectors P2 Midsize and Mini Tower Chassis P3 P4 P5 P6 and P9 All OptiPlex GX1 GX1p Chassis pnann 00 Kai 6 1 2 3 4 5 43 3 VDC blue white 3 3 VDC blue white 3 3 VDC blue white common black common black common black Figure 1 18 DC Power Connectors P2 Low Profile Chassis and P7 All OptiPlex GX1 GX1p Chassis DC Power Distribution Figures 1 19 through 1 23 provide the following information about DC power distribution e Powersupply connector identification Power cable connections for diskette tape CD ROM and hard disk drives Power distribution to sockets and connectors on the system board 126 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC System
40. 75 inches AMIGIUTY 25 sah ence 0 a te 20 6 cm 8 1 inches Depth stu a Kaawa 43 7 cm 172 inches Weight minimum 14 9 kg 33 0 Ib OptiPlex NX1 computers lS 2 fee enu 9 27 cm 3 65 inches Widths pa nag m 33 71 cm 13 27 inches Depth 34 93 cm 13 75 inches Weight 5 9 kg 13 0 Ib Environmental Temperature Operating 10 to 35 C 50 to 95 F Storage ue de ha wana de 40 to 65 C 40 to 149 F 20 to 80 noncondensing 0 25 G at 3 to 200 Hz at 1 octave min 0 5 G at 3 to 200 Hz at 1 octave min The maximum operating temperature of 35 C 95 F is for altitudes below 914 6 m 3000 ft Above 914 6 m 3000 ft the maximum operating temperature is reduced 1 40 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Table 1 6 Technical Specifications continued Environmental continued Maximum shock Operating left side for low profile midsize and Opti Plex NX1 computers operating in a vertical orientation and bottom half sine pulse with a change in velocity of 20 inches sec 50 8 cm sec Storage 27 G faired square wave with a velocity change of 200 inches sec 508 cm sec Altitude Operating 16 to 3048 m 50 to 10 000 ft Storage ee eda bacc ur 16 to 10 600 m 50 to 35 000 ft The maximum operating temperature of 35 C 95 F is for altitudes below 914 6 m 3000 ft Above
41. ARNING The SEC cartridge heat sink assembly can get extremely a hot during system operations Be sure that the assembly has had suf ficient time to cool before touching it 2 Locate the SEC cartridge heat sink assembly 3 Disconnect the microprocessor fan connector from the 3 pin connector on the system board labeled FAN located between the SERIAL2 connec tor and the MONITOR connector 4 Release the two securing clips near the base of the heat sink from the metal standoffs 5 Locate and press inward on the SEC cartridge release latches located directly on top of the SEC cartridge adjacent to the heat sink assembly until the latches click 6 Lift the SEC cartridge heat sink assembly out of its guide bracket assembly connector on the system board NOTE When installing the SEC cartridge heat sink assembly press outward eX on the SEC cartridge release latches and then carefully orient the assembly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its connector The SEC cartridge release latches will click into the locked posi tion as the assembly is seated System Battery BATTERY socket Figure 7 16 System Battery Installation To remove the system battery follow these steps Ll If possible boot the system and enter the System Setup program Then record important system configuration information see Appendix A Sys tem Setup Program for details 716 Dell OptiPlex GX1 GX1
42. BIOS in Flash Memory cece eene 14 EIDE Subsystem 2 23 eere DOLES er PE Xu bI E ER 1 4 SMART Technology 2x Wa GENRE AGE se tela ee ais ea ae 14 Integrated Diskette Tape Drive Controller 0 0 nna eee a 1 5 Integrated SVGA Subsystem 1 0 0 ee 1 5 Integrated Audio Controller cee eee eens 1 5 ATI Multimedia Channel iussi E3 se pee hana es oie eh sees Fad 1 6 Telephony Application Programming Interface 1 6 Chassis Intrusion Detection 0 0 00 ccc ee eens 1 6 Integrated Ethernet NIC Support Optional 1 7 Network Cable Requirements 000 cece eee eee 1 7 Full S tof I O PONG Had Bra ee nS Oe Wee es bw s SER 1 7 Power Supply sss Sera Rouen I4 ap or hahanga sou eh Seg aang S 1 8 Location of Major Components 000 c cece eee eee 1 8 Advanced Expansion Features 0 00 ccc eee ee 1 13 OptiPlex NX1 Computer s Expansion Card Slot 1 14 Low Profile Computer s Expansion Card Slots 1 14 Midsize Computer s Expansion Card Slots 1 14 Mini Tower Computer s Expansion Card Slots 1 16 Upgrade DAONG 20 35 i a d Ihe NG eae Sart Gar here awa ad ka 1 16 Microprocessor L2 Cache Upgrades 00 aaa 1 16 Main Memory Expansion seco naaa SPA eis a eee eiie a 1 17 Video Memory Upgrade Option 0 000 c eee ees 1 17 Computer Service Information 00 000 ee 1 17
43. Chassis Intrusion Detection Chassis Intrusion displays the status of the system chassis intrusion monitor The settings for this option are Enabled Enabled Silent or Disabled The default is Enabled If the computer cover is removed while the intrusion monitor is set to Enabled the setting changes to Detected and the following message appears during the boot sequence at the next system start up Alert Cover was previously removed If the computer cover is removed while the intrusion monitor is set to Enabled Silent the setting changes to Detected but the alert message is not displayed during the boot sequence at the next system start up If the intrusion monitor is set to Disabled no intrusion monitoring occurs and no messages are displayed To reset the Detected setting enter the System Setup program during the system s POST Highlight the Chassis Intrusion option and press the left or right arrow key to choose Enabled Enabled Silent or Disabled Z NOTE If a setup password has been assigned by someone else contact your network administrator for information on resetting the chassis intrusion detector 1 6 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Integrated Ethernet NIC Support Optional The OptiPlex GX1 systems and OptiPlex NX1 systems are available with or without an integrated Ethernet NIC subsystem The OptiPlex GX1p systems are available only with an integrated Ethemet NIC sub
44. DIMM push outward on the DIMM socket s securing clips until the DIM M is released from its socket 1 securing clips 2 Figure 4 15 DIMM Removal 4 Lift the DIMM away from the socket 5 Reinstall the replacement DIMM by pressing the DIMM fully into the socket while closing the securing clips to lock the DIM M into the socket Sina securing clips 2 SS 1 Figure 4 16 DIMM Installation 6 Replace all assemblies and cables previously removed Removing and Replacing Parts on the Low Profile Chassis 4 17 Video Memory notch gt m video memory video memory upgrade socket upgrade module Figure 4 17 Installing a Video Memory Upgrade Module You can upgrade video memory from 4 to 8 MB by installing a video memory upgrade module in the video memory upgrade socket on the system board Adding additional video memory increases the system s video performance and provides additional modes for high resolution expanded color applications To install the video memory upgrade follow these steps L Remove the expansion card cage CAUTION To avoid possible damage to the video memory 1 upgrade socket and or video memory upgrade module the module is keyed and must be correctly positioned before inserting it into the socket 2 Orient the video memory upgrade module as shown in Figure 4 17 Then carefully align the module s edge connector pins with the socket ensuring that the slot in the module mates with the socket key
45. Dell OptiPlex GX1 GX1 p Managed PC and OptiPlex NX1 Net PC Systems Information in this document is subject to change without notice 1996 1998 Dell Computer Corporation All rights reserved Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden Trademarks used in this text Dell the DELL logo and OptiPlexare registered trademarks of Dell Computer Corporation nteland Pentiumare registered trademarks and MM Xis a trademark of Intel Corporation Microsoft Windows and MS DOS are registered trademarks of M icrosoft Corporation IBM and LANDesk are registered trademarks of Intemational Business Machines Corporation 3Com is a registered trademark of 3Com Corporation Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its own August 1998 P N 2403E Contents Chapter 1 System Overview oo oo oo eee la Chassis Diffelehcess s or vise hoe HANGA WIT naa bue S OPNS 1 2 Chassis Similarities 0 0 0 c ccc eee eee eens 1 3 Standard Features 24 icossirngck xke A eens Se aes ev REI 1 3 Pentium II Microprocessor ccc eee eee 1 3 Secondary L2 Caches s 5er Arar so REOR PER Ian vere 1 3 Main Memory 4 estore celiac an eda c RA QE M 1 4 Upgradable
46. Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Table 1 6 Technical Specifications continued Controls and Indicators Reset control push button Power control push button Power indicator green LED in normal operation flashing green LED in sleep state Diskette drive access indicator AA green LED Hard disk drive access Indicator i2 orones green LED Link integrity indicator on systems with NIC connector green LED Activity indicator on systems with NIC connector yellow LED Power Power supply wattage Low profile computers 145 W Midsize computers 200W Mini tower computers 200W OptiPlex NX1 computers 80W Power supply heat dissipation Low profile computers 808 BTU nominal Midsize computers 913 BTU nominal Mini tower computers 913 BTU nominal OptiPlex NX1 Computers i e 400 BTU nominal Power supply voltage 90 to 135 V at 60 Hz 180 to 265 V at 50 Hz Backup battery 3 V CR2022 coin cell System Overview 1 39 Table 1 6 Technical Specifications continued Physical Low profile computers 10 9 cm 4 3 inches 40 89 cm 16 1 inches 43 69 cm 172 inches 10 89 kg 24 0 Ib 16 5 cm 6 5 inches 419 cm 16 5 inches 44 5 cm 175 inches 12 7 kg 28 0 Ib Height 44 4 cm 1
47. FAN main memory Sockets intemal P2 PANEL hard disk drive intemal P3 USB hard disk drive p4 KYBD 3 5 inch diskette drive MOUSE P5 processor MICROPROCESSOR core regulator drive 43 3 VDC P6 optional COrE VCC F21 ot VDE NOTE 5 VFP is routed to drive the integrated NIC logic on P9 the system board and to P1 optional on the riser board drive Figure 1 23 DC Power Distribution for the Mini Tower Computer System Power Supply for the OptiPlex NX1 Computer The OptiPlex NX1 computers have an 80 W computer power supply The power supply can operate from an AC power source of 115 VAC at 60 Hz or 230 VAC at 50 Hz The system power supply provides the DC operating volt ages and currents listed in Table 1 5 Z NOTE The power supply produces DC voltages only under its loaded condi tion Therefore when you measure these voltages the DC power input connectors must be connected to their corresponding power input connectors on the system board and hard disk drive System Overview 1 31 Table 1 5 OptiPlex NX1 DC Voltage Ranges Voltage Range Maximum Output Current 3 3 VDC 3 14 to 3 47 VDC 6 0 A 5 VDC 4 75 to 5 25 VDC 12 0 AZ 12 VDC 1140 to 12 60 VDC 10 A2 12 VDC 10 80 to 13 20 VDC 0 5A 5 VFP3 4 75 to 5 25 VDC 12A 1 The combined load on the 5 VDC and 3 3 VDC outputs should not exceed 65 W Withstands surges of up to 3 0 A to support
48. IMM Removal occa cnc meme m Rn 5 19 DIMM Installation GN RA HAPAG ates kee ee 5 19 Installing a Video M emory Upgrade M odule 5 20 SEC Cartridge Heat Sink Removal 5 21 System Battery Installation a 5 22 Internal View of the Mini Tower Computer 6 3 Computer Cover Removal aaa 6 4 Front Bezel Removal nak acces een PULAG Waele ed NG 6 5 Eject Power and Reset Button Removal 6 6 5 25 Inch Front Panel Insert Removal 6 7 3 5 Inch Front Panel Insert Removal 6 8 Control Panel Removal 0 0 a 6 9 Drive Hardware cia soc m Rx eA AY xaxa 6 10 3 5 Inch Diskette Drive Assembly Removal 6 11 3 5 Inch Diskette Drive Bracket 6 12 5 25 Inch Drive Assembly Removal 0 55 6 12 5 25 Inch Drive Removal anasa aa 6 13 Hard Disk Drive Bracket Removal 7 6 14 Hard Disk Drive Removal 0 0 an 6 15 System Power Supply Removal aaa 6 16 Expansion Card Cage Removal 6 17 Expansion Card Removal 6 18 Riser Board Removal a 6 19 System Board Removal 0c eee eee 6 20 DIMM Removal 0 000 cece eee eee eens 6 21 DIMM Installation p24 ka ve sG E y ERE ERES ks 6 21 Xi Xii Tables Figure 6 22 Figure 6 23 Figure 6 24 Figure 7 1 Figure 7 2 Figure 7 3 Figure 7 4 Figure 7 5 Figure 7 6 Figure
49. IMM sockets 3 To remove a DIMM push outward on the DIMM socket s securing clips until the DIM M is released from its socket o 1 securing clips 2 Figure 6 20 DIMM Removal 4 Lift the DIMM away from the socket 5 Reinstall the replacement DIMM by pressing the DIMM fully into the socket while closing the securing clips to lock the DIMM into the socket securing clips 2 EM 1 Figure 6 21 DIMM Installation 6 Replace all assemblies and cables previously removed Removing and Replacing Parts on the Mini Tower Chassis 6 21 Video Memory notch A SE video memory video memory upgrade socket upgrade module Figure 6 22 Installing a Video Memory Upgrade Module You can upgrade video memory from 4 to 8 MB by installing a video memory upgrade module in the video memory upgrade socket on the system board Adding additional video memory increases the system s video performance and provides additional modes for high resolution expanded color applications To install the video memory upgrade follow these steps 1 Remove the expansion card cage CAUTION To avoid possible damage to the video memory upgrade 1 socket and or video memory upgrade module the module is keyed and must be correctly positioned before inserting it into the socket 2 Orient the video memory upgrade module as shown in Figure 6 22 Then carefully align the module s edge connector pins with the socket ensuring that the slot in the modul
50. Installation aana 4 20 Intemal View of the Midsize Computer 5 3 Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6 Figure 5 7 Figure 5 8 Figure 5 9 Figure 5 10 Figure 5 11 Figure 5 12 Figure 5 13 Figure 5 14 Figure 5 15 Figure 5 16 Figure 5 17 Figure 5 18 Figure 5 19 Figure 5 20 Figure 5 21 Figure 5 22 Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure 6 8 Figure 6 9 Figure 6 10 Figure 6 11 Figure 6 12 Figure 6 13 Figure 6 14 Figure 6 15 Figure 6 16 Figure 6 17 Figure 6 18 Figure 6 19 Figure 6 20 Figure 6 21 Optional Stand Removal 000 cece eee eee 5 4 Computer Cover Removal s aaa 5 5 Eject Power and Reset Button Removal 5 6 Front Panel Insert Removal 00 aa 5 7 Control Panel Removal eee eee 5 8 Drive HaftiWadlesss eod bor bean ees Ha a hes 5 9 3 5 Inch Diskette Drive Removal 5 10 5 25 Inch Drive Assembly Removal 0 55 5 11 5 25 Inch Drive Removal 0 0 cece cence eee 5 11 Hard Disk Drive Bracket Removal 5 12 Hard Disk Drive Removal 00 cee eee eee eee 5 13 System Power Supply Removal aaa 5 14 Expansion Card Cage Removal 5 15 Expansion Card Removal 5 16 Riser Board Removal 4 0 aaa 5 17 System Board Removal 0c eee eee eee 5 18 D
51. Power Connector P1 for the OptiPlex NX1 Computer 0000002 e eee eee 1 32 DC Power Connector P2 for the OptiPlex NAL Computer is anes ieee ee NANANG 1 33 DC Power Connector P3 for the OptiPlex NX1 Computer 0 00002 eee eee 1 33 DC Power Cables for the OptiPlex NL COMPULCK pagpa ha Nae mann ae e eme ate whe 1 33 DC Power Distribution for the OptiPlex NAI COMPULER 35 95 aa Gn ira wrens ts Sec eoa 1 34 Connecting an External Diskette Drive to the OptiPlex NXL Computer 25 p bees Uhm ANA has 2 9 Intemal View of the Low Profile Computer 4 3 Computer Cover Removal lisse eee 4 4 Eject Power and Reset Button Removal 4 5 Front Panel Insert Removal 0000 2 eee eaee 4 6 Control Panel Removal 0c cece eee eee 4 7 Drive Hardware ueste or eat aly ty Sw harang Matag aded 4 8 3 5 Inch Diskette Drive Removal 0a 4 9 5 25 Inch Drive Assembly Removal 4 10 Hard Disk Drive Assembly Removal 4 11 System Power Supply Removal aaa 4 12 Expansion Card Cage Removal aaa 4 13 Expansion Card Removal a 4 14 Riser Board Removal auaa aaa 4 15 System Board Removal ee eee eee eee 4 16 DIMM Removal Sau Ka tay ded Dawin a aie 4 17 DIMM Installation a 4 17 Installing a Video M emory Upgrade Module 4 18 SEC Cartridge Heat Sink Removal 4 19 System Battery
52. When you replace the system battery orient the new bat tery with the facing up see Figure 6 24 Replace the battery only with the same or equivalent type recommended by the manu facturer Discard used batteries according to the manufacturer s instructions 6 Insert the battery into the socket with the positive side labeled facing upwards into its socket and snap it into place 71 Replace the expansion card cage replace the computer cover reconnect all cabling and reboot the system 8 Enter the System Setup program and configure the system using the infor mation from the printouts you made earlier 9 Turn off the computer wait 10 or more minutes and reenter the System Setup program to ensure that the date and time are still correct indicating that the system battery is functioning correctly Removing and Replacing Parts on the Mini Tower Chassis 6 25 6 26 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual CHAPTER 7 Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis This chapter provides procedures for removing the components assemblies and subassemblies in the Dell OptiPlex NX1 Net PC computer If you are ser vicing a low profile midsize or mini tower chassis use Chapter 4 5 or 6 as appropriate for your system Unless otherwise noted each procedure assumes the following You have performed the steps in Precautionary Measures fou
53. all screwdriver and push in on the two or three plastic clips that hold the button to the computer cover When these clips are released the button comes free from the front panel of the cover 5 6 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Front Panel Inserts 5 25 inch f front panel computer cover insert upside down S ring tabs 2 Figure 5 5 Front Panel Insert Removal To remove a front panel insert follow these steps L Lay the computer cover upside down on a flat work surface with the front of the cover facing you 2 From the front of the cover use your thumbs to push inward on the insert until it slides off the two posts To replace a 5 25 inch front panel insert position the two ring tabs over the posts on the inside of the bay opening and then press the ring tabs over the posts If necessary use a 1 4 inch nutdriver to help push on the ring tabs Removing and Replacing Parts on the Midsize Chassis 5 7 Control Panel chassis hooks 2 gE l control panel control panel cable Figure 5 6 Control Panel Removal To remove the control panel follow these steps 1 Remove the hard disk drive bracket 2 Disconnect the control panel cable from the PANEL connector on the sys tem board 3 Remove the mounting screw holding the control panel to the chassis 4 Slide the control panel out of the hooks holding it to the chassis Note the routing of the c
54. ansion card cable connector or mounting screw When you perform the visual inspection refer to Figures 1 3 through 1 6 as appropriate for your system for component location information To perform the internal visual inspection follow these steps L Tum off the system including any attached peripherals and disconnect all the AC power cables from their power sources 2 Remove the computer cover 3 Verify that all chips DIMMs and expansion cards are fully seated in their Sockets or connectors WARNING The single edge contact SEC cartridge heat sink A assembly can get extremely hot Be sure that the assembly has had sufficient time to cool before you touch it CAUTION While reseating the SEC cartridge heat sink assembly 1 use a wrist grounding strap or maintain contact with a metal sur face on the chassis The microprocessor is physically located in a SEC cartridge heat sink assembly on the system board To reseat the microprocessor remove the 24 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual SEC cartridge heat sink assembly and reinstall it as described in SEC Cartridge Heat Sink Assembly in Chapter 4 5 6 or 7 as appropriate for your system To reseat a DIMM remove it from its socket and reinstall it as described in DIMMs in Chapter 4 5 6 or 7 as appropriate for your system If you need to reseat an expansion card remove it from its connector and reinstall it
55. arts on the Mini Tower Chassis 6 1 6 2 WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT Before you start to work on the system perform the following steps in the sequence listed L Tum off the computer and any attached peripherals 2 Disconnect the computer and any attached peripherals from their power sources to reduce the potential for personal injury Also dis connect any telephone or telecommunication lines from the computer 3 Wait 5 seconds after powering down the computer before disconnecting a peripheral from the computer or removing a compo nent from the computer s system board to avoid possible damage to the system board Wear a wrist grounding strap and clip it to an unpainted metal sur face such as the padlock loop on the back of the chassis If a wrist grounding strap is not available periodically touch an unpainted metal surface on the back of the computer to discharge any static charge from your body Avoid touching components and contacts on a card and avoid touching pins on a chip to prevent static electricity damage Inside the Computer Figure 6 1 shows an intemal view of the interior of the mini tower computer and identifies major components for orientation Refer to this illustration as needed when performing the component removal replacement procedures in this chapter Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual power supply hard d
56. as described in Expansion Cards in Chapter 4 5 or 6 or in Expansion Card in Chapter 7 as appropriate for your system 4 Verify that all jumpers are set correctly For information about these jumpers see System Board J umpers in Chapter 1 5 Check all cable connectors inside the computer to verify that they are firmly attached to their appropriate connectors 6 Reinstall the computer cover 7 Reconnect the computer and any attached peripherals to their power sources and tum them on Does the problem appear to be resolved Yes No further steps are necessary Terminate the procedure No Proceed to the next sections Eliminating Resource Conflicts Running the System Diagnostics and Getting Help Eliminating Resource Conflicts Devices within the computer may require dedicated memory spaces interrupt levels or DMA channels all of which must be allocated during installation of the devices Because a device may be installed at a different time it is possible that the same resource is assigned to two or more devices Resource conflicts can result in disorderly or erratic system operation or failure of the system to operate at all If you suspect that resource conflicts might exist check the system and reassign the resources as necessary Running the System Diagnostics The OptiPlex GX1 GX1p systems use either diskette based or server based diagnostics The OptiPlex NX1 systems use either s
57. at secures the system board to the bottom of the chassis ui Slide the system board toward the front of the chassis until it stops 6 Carefully lift the system board out of the chassis be sure to lift evenly and not twist the system board NOTES If you are replacing the system board remove all DIMMs the video memory upgrade module if present the single edge contact SEC cartridge heat sink assembly and the guide bracket assembly from the old system board and install them on the replacement board Also set the jumpers on the new system board so that they are identical to those on the old board unless a microprocessor upgrade is being installed If the original system board has a NIC connector ensure that the replacement board has a NIC connector When you reinstall the system board before you slide the system board back to lock it in position push down near each slot to engage the grounding clip onto its corresponding tab Push evenly on both sides of the system board as you slide it into position do not twist the system board Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual System Board Components The following subsections contain procedures for removing replacing system board components see Figures 1 12 and 1 13 DIMMs To remove a DIMM from one of the three DIMM sockets follow these steps L Remove the system power supply 2 Locate the three DIMM sockets 3 To remove a
58. ate the battery in the front right comer of the system board adjacent to the DIMM connectors CAUTION If you pry out the battery with a blunt object be careful A not to touch the system board with the object Ensure that the object is inserted between the battery and the socket before attempting to pry out the battery Otherwise you may damage the system board by prying off the socket or by breaking traces on the system board 5 Remove the battery by carefully prying it out of its socket with your fingers or with a blunt nonconducting object such as a plastic screwdriver There is a danger of the new battery exploding if it is incorrectly installed When you replace the system battery orient the new bat tery with the facing up see Figure 5 22 Replace the battery only with the same or equivalent type recommended by the manu facturer Discard used batteries according to the manufacturer s instructions 6 Insert the battery into the socket with the positive side labeled facing upwards and snap it into place 71 Replace the expansion card cage replace the computer cover reconnect all cabling and reboot the system 8 Enter the System Setup program and configure the system using the infor mation from the printouts you made earlier 9 Turn off the computer wait 10 or more minutes and then reenter the Sys tem Setup program to ensure that the date and time are still correct indicating that the sys
59. bly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its connector The SEC cartridge release latches will click into the locked posi tion as the assembly is seated System Battery gt L battery a BATTERY socket Figure 6 24 System Battery Installation To remove the system battery follow these steps Ll If possible boot the system and enter the System Setup program Then record important system configuration information see Appendix A Sys tem Setup Program for details 6 24 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 2 Turn off power to all peripherals and disconnect the AC power cable from its electrical outlet 3 Remove the computer cover 4 Remove the expansion card cage and locate the battery in the front right comer of the system board adjacent to the DIMM connectors CAUTION If you pry out the battery with a blunt object be careful A not to touch the system board with the object Ensure that the object is inserted between the battery and the socket before attempting to pry out the battery Otherwise you may damage the system board by prying off the socket or by breaking traces on the system board 5 Remove the battery by carefully prying it out of its socket with your fingers or with a blunt nonconducting object such as a plastic screwdriver There is a danger of the new battery exploding if it is incorrectly installed
60. computer 4 17 installation midsize computer 5 19 installation mini tower computer 6 21 installation OptiPlex NX1 computer 7 13 location on system board 1 18 removal low profile computer 4 17 removal midsize computer 5 19 removal mini tower computer 6 21 removal OptiPlex NX1 computer 7 13 types and sizes 1 17 disk drives See diskette drives drives hard disk drives tape drives CD ROM drives diskette drives extemal drive kit 2 9 removal low profile computer 4 9 removal midsize computer 5 10 removal mini tower computer 6 12 diskette based diagnostics 2 8 DMA channel assignments 1 22 documentation online 1 17 drives 3 5 inch diskette drive removal low profile computer 4 9 3 5 inch diskette drive removal midsize computer 5 10 drives continued 3 5 inch diskette drive removal mini tower computer 6 12 CD ROM drive removal low profile computer 4 10 CD ROM drive removal midsize computer 5 11 CD ROM drive removal mini tower computer 6 12 extemal diskette drive kit OptiPlex NX1 computer 2 8 hard disk drive removal low profile computer 4 11 hard disk drive removal midsize computer 5 12 hard disk drive removal mini tower computer 6 14 hard disk drive removal OptiPlex NX1 computer 7 7 location low profile computer 4 8 location midsize computer 5 9 location mini tower computer 6 10 location OptiPlex NX1 computer 7 3 tape drive removal low profile c
61. d this option lets you correct video problems that may occur when certain video add in cards are used The default is Off If you are using a video add in card and prob lems such as incorrect colors or blank win dows occur set DAC Snoop to On ACPI This option controls the operation of the sys tem s Advanced Configuration and Power Interface ACPI feature When ACPI is set to On momentarily press ing the power button places the system in a powersaving mode To tum the system off completely press the power button for more than four seconds When ACPI is set to On interrupt request IRQ line 9 is not available for use by an expansion card When ACPI is set to Off momentarily press ing the power button tums off the system completely With this setting IRQ9 is available for use by an expansion card Keyboard Errors Enables or disables reporting of keyboard errors during POST System Password Displays current status of system s password security feature Also used to assign and verify anew password Password Status Provides an extra measure of system security by letting you set the system password to Locked or Unlocked Boot Sequence Boot Sequence can be set to Diskette First the default option Hard Disk Only CD ROM First or Device List Setup Password Restricts access to System Setup program A 4 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Ma
62. d and to P1 on the riser board Figure 1 28 DC Power Distribution for the OptiPlex NX1 Computer Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Technical Specifications Table 1 6 Technical Specifications Microprocessor Microprocessor type Intel Pentium Il microprocessor with MM X technology Microprocessor speed 266 333 350 400 or 450 MHz the GX1p is only available in 400 or 450 M Hz External system clock 66 100 MHz Internal cache 32 KB 16 KB data cache and 16 KB instruc tion cache Math coprocessor internal to the microprocessor System Information System chip set Intel 440BX AGPSet chip set Data bus width 64 bits Address bus width 32 bits DMA channels seven Interrupt levels 15 Flash EPROM BIOS 2 Mb Expansion Bus Bus types nnana PCI and ISA PCI bus complies with PCI Specification 2 1 Bus speeds PCI 33 MHz ISA 8 33 MHz PCI expansion card connectors Low profile computers two one PCI connector and one ISA connector share an expansion card slot Midsize computers three one PCI connector and one ISA connector share an expansion card slot or five two share expansion card slots Mini tower computers five two PCI connectors share expansion card slots with ISA connectors OptiPlex NX1 computers one
63. des of the system board as you slide it into position do not twist the system board 5 18 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual System Board Components The following subsections contain procedures for removing replacing system board components see Figures 1 12 and 1 13 DIMMs To remove a DIMM from one of the three DIMM sockets follow these steps L Remove the system power supply 2 Locate the three DIMM sockets 3 To remove a DIMM push outward on the DIMM socket s securing clips until the DIM M is released from its socket 1 securing clips 2 Figure 5 18 DIMM Removal 4 Lift the DIMM away from the socket 5 Reinstall the replacement DIMM by pressing the DIMM fully into the socket while closing the securing clips to lock the DIM M into the socket i 2 securing clips 2 AI 1 Figure 5 19 DIMM Installation 6 Replace all assemblies and cables previously removed Removing and Replacing Parts on the Midsize Chassis 8 5 19 Video Memory notch gt P d video memory video memory upgrade socket upgrade module Figure 5 20 Installing a Video Memory Upgrade Module You can upgrade video memory from 4 to 8 MB by installing a video memory upgrade module in the video memory upgrade socket on the system board Adding additional video memory increases the system s video performance and provides additional modes for high resolution expanded color applications
64. disconnecting a peripheral from the computer or removing a component from the computer s system board to avoid possible dam age to the system board Wear a wrist grounding strap and clip it to an unpainted metal sur face such as the padlock loop on the back of the chassis If a wrist grounding strap is not available periodically touch an unpainted metal surface on the back of the computer to discharge any static charge from your body Avoid touching components and contacts on a card and avoid touching pins on a chip to prevent static electricity damage Inside the Computer Figure 4 1 shows an internal view of the interior of the low profile computer and identifies major components for orientation Refer to this illustration as needed when performing the component removal replacement procedures in this chapter Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual diskette drive CD ROM drive in extemal bay drive cage for i external drive power supply ZA X p aN intemal hard disk drive LI chassis Oo intrusion switch expansion card cage system board Figure 4 1 Internal View of the Low Profile Computer Removing and Replacing Parts on the Low Profile Chassis 43 Computer Cover securing buttons 2 front of computer Figure 4 2 Computer Cover Removal To remove the computer cover follow these steps L Tum off power to all peripherals and disconnect th
65. disk start up operations 3 VFP volts flea power sometimes called standby power OptiPlex NX1 Pin Assignments for the DC Power Connectors The powersupply output voltages can be measured at the back wire side of the connectors without disconnecting them Figures 1 24 through 1 26 show the wire side of the connectors open common black common black common black PSON gray E 11 12 13 14 15 16 17 15 VDC red 15 VDC red 15 VDC red TFSC brown 5 VDC red 18 19 20 0000 DD P1 0000000000 1 2 3 4 5 5 VDC red common black 5 VDC red common black common black common black 12 VDC blue 12 VDC yellow 5 VFP purple PWRGOOD orange Pin 11 PSON should measure between 4 and 5 VDC except when the power button on the front panel is pressed taking PSON to its active low state the powersupply fan speed Pin 19 Thermal fan speed control TFSC is a powersupply input signal used to control Pin 5 PWRGOOD should measure between 4 and 5 VDC when the power supply is on to indicate that all powersupply output voltages are within the ranges specified in Table 1 5 Figure 1 24 DC Power Connector P1 for the OptiPlex NX1 Computer 1 32 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual pooo nn me 6 1 2 3 4 5 43 3 VDC blue white 43 3 VDC blue white 43 3 VDC blue whit
66. e You may also have to reseat or replace an SEC cartridge heat sink assembly during normal maintenance SEC Cartridge Heat Sink Assembly SEC cartridge release latches 2 heat sink SEC heat sink clips 2 cartridge guide bracket assembly metal standoffs 2 Figure 4 18 SEC Cartridge Heat Sink Removal Removing and Replacing Parts on the Low Profile Chassis 4 19 To remove the SEC cartridge heat sink assembly follow these steps L Remove the system power supply WARNING The SEC cartridge heat sink assembly can get extremely a hot during system operations Be sure that the assembly has had suf ficient time to cool before touching it 2 Locate the SEC cartridge heat sink assembly 3 Disconnect the microprocessor fan connector from the 3 pin connector on the system board labeled FAN located between the SERIAL2 connec tor and the MONITOR connector 4 Release the two securing clips near the base of the heat sink from the metal standoffs 5 Locate and press inward on the SEC cartridge release latches located directly on top of the SEC cartridge adjacent to the heat sink assembly until the latches click 6 Lift the SEC cartridge heat sink assembly out of its guide bracket assembly connector on the system board NOTE When installing the SEC cartridge heat sink assembly press outward eX on the SEC cartridge release latches and then carefully orient the assembly and press firmly with up
67. e common black common black common black Figure 1 25 DC Power Connector P2 for the OptiPlex NX1 Computer 1 2 3 4 L 5 VDC red common black common black 12 VDC yellow Figure 1 26 DC Power Connector P3 for the OptiPlex NX1 Computer DC Power Distribution for the OptiPlex NX1 Computer Figures 1 27 and 1 28 provide the following information about DC power distribution e Powersupply connector identification e Power cable connection for the hard disk drive e Power distribution to sockets and connectors on the system board Figure 1 27 DC Power Cables for the OptiPlex NX1 Computer System Overview 1 33 1 34 PWRGOOD PSON P1 power management and NIC logic RTC NVRAM ull POWER 1 45 VFP P1 System power supply 43 3 VDC 43 3 VDC 45 VDC 45 VDC 45 VDC 45 VDC 412 VDC 412 VDC 412 VDC 412 VDC PCI 12 VDC 12 VDC 12 VDC 13 3 VDC RISER internal P3 hard disk drive 12 VDC main memory sockets DIMM_C b processor MICROPROCESSOR core regulator 13 3 VDC f core VCC 2 1 to 3 5 VDC riser board FAN PANEL USB KYBD fuses 2 MOUSE NOTE 5 VFP is routed to the integrated NIC logic on the system boar
68. e AC power cable from its electrical outlet Remove the padlock if one is installed Press in on the two securing buttons until the cover is free to swing up Raise the back of the cover and pivot it toward the front of the computer u BS WN Lift the cover off of the hooks at the front of the chassis Three plastic hooks on the inside front part of the cover secure it to the chassis Before you reinstall the cover fold all cables out of the way so that they do not interfere with the cover or with proper airflow inside the computer 4 4 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Eject Power and Reset Buttons eject button computer cover upside down B a power button Figure 4 3 Eject Power and Reset Button Removal L Lay the computer cover upside down on a flat work surface with the back 2 of the cover facing you To remove the 3 5 inch diskette drive eject button pull gently on the plastic part of the button until it comes free To remove the power button or the reset button use a small screwdriver and push in on the two or three plastic clips that hold the button to the computer cover When these clips are released the button comes free from the front panel of the cover Removing and Replacing Parts on the Low Profile Chassis 4 5 46 Front Panel Inserts 5 25 inch front panel insert O computer cover upside down posts 2 ring tabs
69. e Assembly 0 00 eee eee 6 11 5 25 Inch Drive Assembly 00 00 cece eee eee 6 12 Hard Disk Drive Bracket eue bed KAW RR ex 6 14 Hard Disk DNV i ads Dad Wang Neb NA tuu dad e pIS PI Pelo 2 ds 6 15 System Power Supply osana eres 6 16 Expansion Cards cedes edu RE E ee Wed eee ben Seve feeds 6 17 Expansion Card Cagen lt u oust ceca a tu kei eats acai a 6 17 Expansion Card uie AYAN kuna GB EG pele PAA 6 18 F iser Board Hana dou RAK Sota E Peewee bike So aude rM 6 19 System BOG us box th See a Ie Re eo Nee ees TIG dade 6 20 System Board Components s eon ve Ea ANGARA Re ges rede m 6 21 DIMMS svi eevee Howes Sate RIT EBAYSqURWCPERIMIAE Gu 6 21 Video M SITIO osos hs ews gaa td ayaa lt teas one har alte 6 22 Microprocessor 22 4224 ous ASA Sese ties ats Aer as hart iu oe 6 23 SEC Cartridge Heat Sink Assembly 0000s 6 23 Systemi Battel aeu uon ea ador NLA ATON IO EN dob a dd b REM e Qd 6 24 Chapter 7 Appendix A Index Figures Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7 1 Recommended Tools c eee eee eee eee eee eee ens 7 1 Precautionary Measures aaa turd creer ang RS e a 7 2 Inside the Computer 0 0 ccc eee mmn 7 2 Optional Stand ua DAA ma ENNA NGPA nd aU uae xus UB aa AUS ve 7 3 COImpLter Cover usen pa e ke ies ary Sew ae a Be 7 4 C ntrol Pane UP 7 6 Hard Disk Dre AA 7 7 System Power Supply asasan nananana ERE Nine deus 78 Expansion Card Ca
70. e front facing you 2 Inside the bezel press the eject button mechanism toward the front panel to snap the plastic insert out of its opening To replace the 3 5 inch front panel insert work from outside the bezel Place the insert in position and press it into the opening 6 8 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Control Panel chassis hooks 2 control panel Figure 6 7 Control Panel Removal To remove the control panel follow these steps l 2 Remove the hard disk drive bracket Disconnect the control panel cable from the PANEL connector on the sys tem board Remove the mounting screw holding the control panel to the chassis Slide the control panel out of the hooks holding it to the chassis Note the routing of the control panel cable as you remove it from the chassis Removing and Replacing Parts on the Mini Tower Chassis 6 9 Drives Figure 6 8 shows an example of drive hardware that can be installed in the computer Refer to this figure when you perform any of the procedures in the following subsections diskette tape drive 3 5 inch diskette interface cable drive DC power cable DSKT connector secondary EIDE interface T connector IDE2 primary EIDE EIDE cable interface connector IDE1 Figure 6 8 Drive Hardware Externally Accessible Drive Assemblies The following subsections contain removal replacement procedures for
71. e hard disk drive assembly up and lift it out of the chassis 4 Remove the four hard disk drive mounting screws that attach the hard disk drive to the hard disk drive bracket When you reinstall the hard disk drive assembly be sure that the tabs on the back of the mounting plate fully engage the notches on the chassis before you rotate the assembly into place Removing and Replacing Parts on the Low Profile Chassis 4 11 System Power Supply power supply powersupply mounting screw Figure 4 10 System Power Supply Removal To remove the system power supply follow these steps l 2 3 4 Disconnect the AC power cable from the back of the power supply Disconnect the DC power cables from the system board and the drives Remove the powersupply mounting screw at the back of the chassis Slide the system power supply forward until it stops then lift it from the chassis When you replace the system power supply place it down inside the chassis and against the right side of the chassis Then slide the system power supply toward the back of the chassis and hook the tabs into the right side of the power supply WARNING The voltage selection switch located on the back of the A power supply assembly must be set to the correct operating voltage 115 or 230 V before the power cable is plugged into an electrical outlet 4 12 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Expansio
72. e mates with the socket key 3 Press the video memory upgrade module firmly into the socket and pivot the module downward until the module clicks into place Z NOTE If you do not hear a sharp click when installing the video memory upgrade module remove the module and repeat steps 2 and 3 4 Replace the expansion card cage 5 Replace the computer cover and reconnect the AC power cable to the electrical outlet Press the power button on the computer to reboot the system X NOTE As the system boots it automatically detects the presence of the new video memory upgrade module and automatically changes the sys tem configuration information in the System Setup program 6 22 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 6 Enter the System Setup program and confirm that 8 MB is shown in the Video Memory option If the total memory is listed incorrectly repeat steps 1 through 6 to reseat the video memory upgrade module and verify that the computer acknowledges the module 7 Run the system diagnostics Video Test Group to test the new video memory upgrade module Microprocessor To take advantage of future options in processor speed and functionality you can replace the microprocessor on your system board with any Dell supported microprocessor upgrade The microprocessor upgrade kit is shipped with an SEC cartridge heat sink assembly which includes the microprocessor micro processor heat sink
73. ected Drive not ready Diskette missing from or improperly inserted in diskette drive Defective unformatted or improperly inserted diskette Gate A20 Gate A20 of the Faulty keyboard controller failure keyboard controller defective system board malfunctioned General failure Operating system can Operating system cor not execute command rupted or not installed properly Hard disk Hard disk drive failed to Incorrect configuration controller initialize settings in System Setup failure program improperly con Hard disk drive read failure Hard disk failure nected hard disk drive cable faulty hard disk drive controller sub system or loose power cable Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Table 3 2 System Error Messages continued Message Definition Probable Causes Invalid config uration information please run SETUP program System Setup program contains incorrect system configuration settings Incorrect configuration settings in System Setup program or faulty battery Keyboard clock line failure Keyboard data line failure Keyboard pas failure Keyboard stuck System cannot commu nicate with keyboard Keyboard cable connec tor loose or improperly connected defective keyboard or defective keyboard mouse controller defective system board key fai
74. em using the infor mation from the printouts you made earlier 9 Turn off the computer wait 10 or more minutes and then reenter the Sys tem Setup program to ensure that the date and time are still correct indicating that the system battery is functioning correctly Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7 17 7 18 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual APPENDIX A System Setup Program This appendix which applies to all Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC computer families describes the System Setup program which is used to change the system configuration information stored in NVRAM on the system board To enter the System Setup program follow these steps L Turn on or reboot the system 2 Press lt F2 gt when the Dell logo screen appears If you wait too long and the operating system begins to load into memory et the system complete the load operation then shut down the system and try again NOTE To ensure an orderly system shutdown consult the documentation that accompanied the operating system System Setup Program A 1 A 2 System Setup Screens configuration options title box help Dell Computer Corporation RET Page 1 of 2 System OptiPlex GX1 400M Setup BIOS Version XXX Diskette Drive A 3 5 inch 1 44 MB Diskette Drive B Not Installed Drives Primary Type Cyls Hds Pre LZ Sec Size
75. emory installed No memory installed or faulty or improperly seated DIMM 1 3 3 13 4 14 1 14 2 2 1 1 through 2 4 4 Chip or data line failure in the first 64 KB of main memory Odd even logic failure in the first 64 KB of main memory Address line failure in the first 64 KB of main memory Parity failure in the first 64 KB of main memory Bit failure in the first 64 KB of main memory Faulty or improperly seated DIMM 3 11 3 1 2 3 13 3 1 4 Slave DMA register failure Master DM A register failure Master interrupt mask regis ter failure Slave interrupt mask register failure Defective system board 324 Keyboard controller test failure Faulty keyboard controller defective system board 3 3 4 3 4 1 3 4 2 Screen initialization failure Screen retrace test failure Search for video ROM failure Faulty video subsystem defective system board 4 2 1 4 2 2 4 2 3 4 2 4 No timer tick Shutdown failure Gate A20 failure Unexpected interrupt in protected mode Defective system board 4 3 1 Memory failure above address OFFFFh Faulty or improperly seated DIMM 4 3 3 Timerchip counter 2 failure Defective system board 3 2 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Table 3 1 POST Beep Codes continued Beep Code Error Probable Causes 4 3 4 Time of day clock stopped Bad battery or defect
76. er 7 7 service information 1 22 SMART technology 1 4 hard disk based diagnostics 2 7 heat sink SEC cartridge assembly See SEC cartridge heat sink assembly help getting 2 10 I I O ports 1 7 indicators See controls and indicators internal view low profile computer 1 10 midsize computer 1 11 mini tower computer 1 12 OptiPlex NX1 computer 1 13 internal visual inspection 2 4 interrupt assignments list of 1 21 ISA expansion card connectors low profile computer 1 14 midsize computer 1 14 mini tower computer 1 16 OptiPlex NX1 computer 1 14 J jumpers 1 20 K key combination to enter System Setup program A 1 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service M anual M main memory 1 4 1 17 memory subsystem expansion using DIMMs 1 17 flash ROM 1 4 main memory 1 4 secondary L2 cache 1 3 1 16 messages error 3 3 microprocessor about 1 3 removal low profile computer 4 19 removal midsize computer 5 21 removal mini tower computer 6 23 removal OptiPlex NX1 computer 7 15 N network cable requirements 1 7 NIC connector indicators 1 7 controller 1 7 optional support 1 7 O online documentation 1 17 optional stand removal midsize computer 5 4 OptiPlex NX1 computer 7 3 options upgrade 1 16 P PCI expansion card connectors low profile computer 1 14 midsize computer 1 14 mini tower computer 1 16 OptiPlex NX1 compute
77. erver based hard disk based or optionally diskette based diagnostics using an extemal diskette drive kit connected to the computer as shown in Figure 2 1 and described in Diskette Based Diagnostics found later in this chapter Basic Troubleshooting 2 5 Server Based Diagnostics The serverbased diagnostics contains tests that aid in troubleshooting major components of the computer To run the serverbased diagnostics follow these steps L Turn on all peripherals and the computer If the system is already on press lt Ctrl gt lt Alt gt lt Del gt to reboot the system 2 If necessary enter the System Setup program and set the system to boot from the network Highlight the Boot Sequence option See Figure A 1 Either press lt Alt gt lt d gt to restore the default settings or press lt Ctrl gt and the right arrow key to display the Device List screen see Figure A 2 Then move the LANDesk Service Agent option above the Hard Drive C option in the Boot Device Priority list Press lt Alt gt lt B gt to reboot the system 3 Press the spacebar immediately after you see the following message Press the lt Spacebar gt for Configuration Services or lt Esc gt or lt Ctrl gt lt c gt to cancel If you wait more than 5 seconds before pressing the spacebar the mes Sage disappears and the load operation continues Let the system complete the load operation then shut down the system and try again 4 Type f immed
78. ess indicator Low Profile Chassis Mb diskette drive access indicator power button hard disk drive power indicator access indicator reset button Midsize Chassis diskette drive access indicator power indicator power button hard disk drive reset button access indicator Mini Tower Chassis power button power ER indicator hard disk drive access indicator OptiPlex NX1 Chassis Figure 1 2 Front Panel Features System Overview 1 9 3 5 inch diskette drive diskette tape drive interface cable power supply hard disk drive padlock ring interface cable hard disk drive voltage selection chassis switch 7 j Pd mga intrusion N switch AC power receptacle 2 wes S SH parallel port connector serial port 1 Ss A MO AS hu expansion card o QN 1 cage connector p SF al mouse expansion card slots 3 connector keyboard connector audio connectors 3 USB connectors 2 NIC connector optional serial port 2 connector video connector security cable slot Figure 1 3 Internal View of the Low Profile Chassis 1 10 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 3 5 inch diskette drive diskette tape drive interface cable drive cage hard disk drive bracket 3S power supply AC power receptacle ST gt voltage Zat chassis intrusion switch hard disk drive inter
79. face cable selection switch Teese I padlock ring En parallel port SS connector SSS serial port 1 iy connector mouse connector expansion card cage expansion card slots 5 keyboard connector USB connectors 2 audio connectors 3 NIC connector optional serial port 2 connector video connector security cable slot Figure 1 4 Internal View of the Midsize Chassis System Overview 1 11 AC power receptacle power supply security cable slot external drive bays parallel port connector serial port 1 connector keyboard connector A AN hard disk drive mouse bracket connector USB connectors 2 n serial port 2 connector video connector i NIC connector optional A expansion card cage audio connectors 3 system board iser board padlock ring SE S Figure 1 5 Internal View of the Mini Tower Chassis 1 12 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual chassis intrusion switch power supply DC power cable padlock ring security EIDE cable access lock parallel port connector serial port 1 connector mouse hard disk drive connector expansion card cage Sh keyboard connector expansion card slot USB connectors 2 C power receptacle security audio connectors 3 serial port 2 connector cable slot NIC connector optional video connector Figure 1
80. forming at the time the problem occurred Can the user duplicate the problem Yes Proceed to step 3 No Proceed to the next section Extemal Visual Inspection 3 Observe the user to determine if he or she is making an error such as typing an incorrect key combination or entering a command incorrectly Is the problem a result of user error Yes Instruct the user in the proper procedure or direct him or her to the appropriate user documentation for the correct procedure No Proceed to the next section External Visual Inspection Basic Troubleshooting 2 1 External Visual Inspection The external visual inspection consists of a quick inspection of the exterior of the computer the monitor the keyboard any peripherals and cables While performing the visual inspection make any necessary corrections To perform the extemal visual inspection follow these steps l 2 Turn off the computer the monitor and all peripherals Verify that all power cables are properly connected to the computer the monitor and peripherals and their power sources Verify that the keyboard and mouse interface cables are firmly attached to the proper connectors on the back of the computer For a PS 2 compatible mouse the keyboard and mouse interface cable connectors are identical except for their labels For a serial mouse the mouse interface cable must be firmly attached to one of the serial port connectors and its captive sc
81. ge env ab wind ah boos ming KANA wd Ang wide phan 7 9 Expansion Card 2 5 unos ss lca dee be eux RR RR RR ek bead m RUE Aa 7 10 Ris r Board cai ess dup areae gepostet E cats thy magara andang 7 11 System Board 2d amautned auto 2 3 ate Sad ade none Sunn vt qi toe NAA 7 12 System Board Components cece eee 7 13 DEI Sard bce te ie Ny arte shod as te ils Mena si ei d BRAIN NANANG 7 13 Video MEMORY paa kna Aah soe And asha oe dod eek o ngh 7 14 MiCIODIOCGSSOr Kaha DINAMA hee PERS ALI GNUNG ue te PAASA akan d 7 15 SEC Cartridge Heat Sink Assembly n n 0 000 ccc ee ee 7 15 SYSTEM Batte iod sucus eda PAA e Gor geal ae eds wads 7 16 System Setup Program A 1l System Setup Screens ur y cease Eee bales KER VERE eae A 2 Device ENS be d Ses ass GA PA ate oe E aie DE Ege A 6 Figure 1 1 Chassis Configurations llle 1 2 Figure 1 2 Front Panel Features 00 0000 leere 1 9 Figure 1 3 Intemal View of the Low Profile Chassis 1 10 Figure 1 4 Intemal View of the Midsize Chassis 1 11 Figure 1 5 8 Intemal View of the Mini Tower Chassis 1 12 Figure 1 6 Internal View of the OptiPlex NX1 Chassis 1 13 Figure 1 7 Riser Board for the OptiPlex NX1 Computer 1 14 Figure 1 8 Riser Board for the Low Profile Computer 1 14 Figure 1 9 Riser Board for the Midsize Computer Option 1 1 15 Figure 1 10 Riser Board for the
82. hard disk drive bracket at the sides of the drive The other hard disk drive attaches to the hard disk drive bracket at the bottom of the hard disk drive 3 Slide the drive out of the hard disk drive bracket Removing and Replacing Parts on the Midsize Chassis 5 13 System Power Supply power supply DC power cables securing tab slot Figure 5 13 System Power Supply Removal To remove the system power supply follow these steps l 2 Disconnect the AC power cable from the back of the power supply Free the system power supply from the securing tab labeled RELEASE 5 and rotate it to the right until it stops Press the securing tab to the left to release the power supply Disconnect the DC power cables from the system board and the drives Lift the front end of the system power supply up and move it to the right to disengage the power supply from the slot in the chassis Lift the system power supply from the computer 5 14 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Expansion Cards The computer has a removable expansion card cage The expansion card cage contains the riser board and any installed expansion cards Dell recommends that you remove the expansion card cage first before removing or installing expansion cards If you are not removing any expansion cards leave the external cables attached to them Expansion Card Cage expansion card cage Figu
83. i NAG WANG HEEL ade NLA DIWANG 5 13 System Power SUDDly i ses Pha BKA BAK NLA NG BBL PNG ERES e 5 14 vii Viii Chapter 6 Expansion CardS 2 0002 a ANG aad ESOS de wd add a Don fiio dut 5 15 Expansion Card Cage sus suu max sees hee heen ee RR m DE 5 15 Expansion Card apt Bae a E be ETE DNS Idus 5 16 Riser B ard s co ereadur ayera aN AA SS et bated 5 17 System BOdSId aaa Tasa tue epa HAT bees Chad bende be Caan wane 5 18 System Board Components 0c e eee eee eee 5 19 Pl np To PTT 5 19 Video M GIOI i odawsc xx wu er V Run RA YA WANNA Va rd E EAS 5 20 MICIODIOCOSSOF 24 3 Gebr aspe uit e tema eed oes hes rat adus 5 21 SEC Cartridge Heat Sink Assembly 02000 02 eee 5 21 System Battery s cos duo KRAS Renae da avete aus Urt eee oy 5 22 Removing and Replacing Parts on the Mini Tower Chassis o 0 00 1 Recommended Tools 0200 c cece eee eee ees 6 1 Precautionary Measures 000 cee es 6 1 Inside the Computer 000 cece ees 6 2 Computer Covere ce creed ed ex feles was eee aaa whales 6 4 Front Bezels cineca ate nd ur aceto eg usd needs GON UU ett 6 5 Eject Power and Reset Buttons eee eee 6 6 Front Panel INSens 2 2634 kab AA bebe ak ee See eb eke SY anes Sees 6 7 Control Papel uu Saved hee weodasd Rea Xac uA ore or SANGA 6 9 DAWES EMEN Tatang dng tuna oe mc satan ad Cal 6 10 Externally Accessible Drive Assemblies 6 10 3 5 Inch Diskette Driv
84. iPlex GX1 GX1p and OptiPlex NX1 systems include the following ports e 25 hole bidirectional parallel port with EPP ECP and demand mode DMA support e Two Universal Serial Bus USB ports e Two 9 pin serial ports Two PS 2 ports mouse and keyboard One 15 hole video connector Three audio jacks microphone line in and line out e One RJ 45 Ethemet NIC connector See Figures 1 3 through 1 6 for I O port identifiers for the various chassis configurations System Overview 1 7 Power Supply The OptiPlex GX1 GX1p and OptiPlex NX1 systems are equipped with a switch selectable 115 230 VAC power supply that can operate from standard AC power outlets in the U S and all international countries The power supply used in the midsize and mini tower chassis configurations is a higher capacity power supply than that used in the low profile and OptiPlex NX1 chassis configurations Dell OptiPlex GX1 GX1p and OptiPlex NX1 systems have a special power sup ply that provides trickle flea power to support the Wakeup On LAN feature when computer power is off Location of Major Components Figure 1 2 shows the front panel features for the four chassis types Figures 1 3 through 1 6 show intemal features of the four chassis types 1 8 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual o es m diskette drive power button power indicator hard disk drive access indicator reset button acc
85. iately after you see a menu to enter the firmware update services If you wait more than 3 seconds before making a selection the system automatically enters the software services 5 Enter a user name and password at the logon prompt Contact the network administrator for information on system access 6 Using the arrow keys highlight Dell N 5XXX Diagnostics and press lt Enter gt 7 Select Run Once or Loop Continuously to begin the tests The tests continue to run until an error is encountered When an error is reported you have the option of stopping or continuing the tests When the tests are completed or stopped the total number of errors is reported there is no error log The server based diagnostics consists of the following test groups e Coprocessor Tests Check the math coprocessor s numerical calculation and errorhandling abilities e CMOS Confidence Test Checks the NVRAM for accessibility and reliabil ity of data storage e DMA Controller Test Checks correct operation of the DMA controller 2 6 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual e Timers Test Checks the timers used by the microprocessor e RTC Test Confirms the functionality and accuracy of the computer s RTC e PIC Test Generates an interrupt on each IRQ line to verify interrupt con troller operation e Speaker Test Checks the functionality of the speaker by generating tones Video Test
86. ibed in the fol lowing procedure The diskette based diagnostics contains the same tests as the hard disk based diagnostics These tests aid in troubleshooting all major components of the system CAUTION To prevent damage to the original diagnostics diskette always use a backup copy of the diagnostics diskette when servicing a user s computer Dell recommends that users make several copies of the original diskette to ensure that one is always available Connecting an External Diskette Drive to the OptiPlex NX1 Computer Na hard disk drive x extemal diskette drive L diskette drive g connector lt interface cable Y cable Figure 2 1 Connecting an External Diskette Drive to the OptiPlex NX1 Computer To install the extemal diskette drive follow these steps L Turn off the computer including any attached peripherals and disconnect all the AC power cables from their power sources 2 Disconnect power input connector P3 from the back of the hard disk drive 3 Connect the interface cable to the back of the external diskette drive See Figure 2 1 and to the DSKT connector on the system board see Figure 1 12 4 Attach the Y cable to power input connector P3 as shown in Figure 2 L 5 Connect the Y cable s hard disk drive connector to the hard disk drive 6 Connect the Y cable s diskette drive connector to the back of the external diskette drive Basic Troubleshooting 2 9 Running the Diskette Based Diagnos
87. iguration settings in System Setup program or no operating system on hard disk drive No timer tick interrupt Timer on system board malfunctioning Defective system board Non system disk or disk error Diskette in drive A or hard disk drive does not have bootable operating system installed on it Faulty diskette diskette tape drive subsystem or hard disk drive subsystem Not a boot diskette No operating system on diskette No operating system on diskette Plug and Play Configuration Error System encountered problem in trying to configure one or more expansion cards System resource conflict Read fault MS DOS cannot read Faulty diskette or hard from diskette or hard disk drive disk drive Requested sec System could not find tor not found particular sector on disk or requested sector defective Reset failed Disk reset operation Improperly connected failed diskette tape drive hard disk drive interface cable or power cable Sector not found MS DOS unable to locate sector on dis kette or hard disk drive Defective sectors on diskette or hard disk drive Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Table 3 2 System Error Messages continued Message Definition Probable Causes Seek error MS DOS unable to Defective diskette or locate specific track on hard disk drive dis
88. inch bays for diskette tape or CD ROM drives 1 36 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Table 1 6 Technical Specifications continued Drives continued Mini tower computers OptiPlex NX1 computers Internal hard disk drive bays Low profile computers Midsize computers one 3 5 inch bay for a 3 5 inch diskette drive three 5 25 inch bays for diskette tape or CD ROM drives none one bay for a 1 inch high EIDE or SCSI hard disk drive two bays for either one or two 1 inch high EIDE or SCSI hard disk drives or one 1 inch high EIDE or SCSI hard disk drive and one 1 6 inch high EIDE or SCSI hard disk drive Mini tower computers two bays for either one or two 1 inch high EIDE or SCSI hard disk drives or one 1 inch high EIDE or SCSI hard disk drive and one 1 6 inch high EIDE or SCSI hard disk drive OptiPlex NX1 computers one bay for a 1 inch high EIDE hard disk drive Video Video type integrated ATI RAGE PRO TURBO graphics Video memory Video resolutions 4 MB SGRAM upgradable to 8 MB on the GX1 and NX1 8 MB standard on the GX1p 640 x 480 32 bpp True color 85 Hz minimum 4 MB video memory required 800 x 600 32 bpp True color 85 Hz minimum 4 MB video memory required 1024 x 768 32 bpp True color 85 Hz minimum 4 MB video memory required 1280 x 1024 32 bpp True color
89. inch high EIDE or SCSI hard disk drives or one 1 inch high EIDE or SCSI hard disk drive and one 16 inch high EIDE or SCSI hard disk drive Hard Disk Drive for the OptiPlex NX1 Computer One 1 inch high EIDE hard disk drive can be mounted to the top of the expansion card cage Power Supply Service Data The low profile computers have a 145 W system power supply the midsize computers have a 200 W system power supply and the mini tower computers have a 230 W power supply All system power supplies can operate from an AC power source of 115 VAC at 50 to 60 Hz or 230 VAC at 50 to 60 Hz WARNING The voltage selection switch located on the back of the A power supply assembly must be set to the correct operating voltage 115 or 230 V before you plug the power cable into an electrical outlet The system power supply provides the DC operating voltages and currents listed in Table 1 4 NOTE The power supply produces DC voltages only under its loaded condi X tion Therefore when you measure these voltages the DC power input connectors must be connected to their corresponding power input connectors on the system board or drives Table 1 4 OptiPlex GX1 GX1 p DC Voltage Ranges Voltage Range Maximum Output Current 43 3 VDC 43 15 to 43 45 VDC 12 0 A low profile computers 14 0 At midsize and mini tower computers 45 VDC 4 75 to 5 25 VDC 18 0 A low profile computers 22 0 A midsize and mini tower computers 12
90. include an integrated high performance 64 bit accelerated graphics port AGP subsystem imple mented on the system board which drives an external SVGA monitor The AGP contains a dedicated bus that bypasses the PCI bus and allows for inter connection of the video subsystem directly to the Pentium chip set for the extra high performance required for 3D video subsystems This architecture also off loads the PCI bus providing greater performance for devices attached to the PCI bus The maximum supported resolution is 1600 x 1200 with 65 535 colors at 75 Hz The SVGA subsystem consists of the following major components e ATI RAGE PRO TURBO video controller e 4MB synchronous graphics random access memory SGRAM video memory expandable to 8 MB via a video memory upgrade kit 8 M B stan dard on the GX1p e 15 hole monitor port Integrated Audio Controller The integrated audio controller is a single chip that connects to the ISA bus The audio controller has analog jacks for line in and microphone input The single line out output jack provides stereo output for a line level input to an external amplifier or drives stereo headphones See Technical Specifications found later in this chapter for audio jack input and output specifications System Overview 1 5 ATI Multimedia Channel The ATI multimedia channel AM C implements a local graphics bus that allows external devices to attach directly to the graphics controller The AMC allow
91. ine observe the system for any of the following e Diskette drive and hard disk drive access indicators These indicators light up in response to data being transferred to or from the drives If either of these indicators fails to light up during the boot routine troubleshoot the diskette drive or hard disk drive subsystem as appropriate Basic Troubleshooting 2 3 e System error messages These messages can indicate problems or provide status information If a system error message is displayed see Table 3 2 e Beep codes A beep code is a series of beeps that indicates an error condition If the system emits a beep code see Table 3 1 5 Observe the monitor screen for the Diagnostics Menu Does the Diagnostics Menu appear Yes See Running the System Diagnostics found later in this chapter No Proceed to step 6 6 Insert another copy of the Dell Diagnostics Diskette into the diskette drive and reboot the system Does the Diagnostics Menu appear Yes See Running the System Diagnostics found later in this chapter No Proceed to the next section Internal Visual Inspection Internal Visual Inspection CAUTION Before you proceed with the internal visual inspection 1 described in this section ensure that the user has saved all open files and exited all open applications if possible A simple visual inspection of a computer s interior hardware can often lead to the source of a problem such as a loose exp
92. ing all major components of the OptiPlex GX1 and GX1p The OptiPlex NX1 systems use serverbased diagnostics hard disk based diagnostics or the diskette based diagnostics using an extemal diskette drive kit connected directly to the system board See Running the System Diagnostics in Chapter 2 for additional information System Board Service Data The following subsections provide service related information about the sys tem board and components System Board The OptiPlex GX1p and newer versions of the GX1 and OptiPlex NX1 systems use the system board shown in Figure 1 12 integrated NIC is optional on the GX1 and NX1 Older versions of the OptiPlex GX1 and OtiPlex NX1 systems use the system board shown in Figure 1 13 DIMM sockets 3 3 3 V power battery socket telephon j ry parallel serial port 1 ae DIMM_A DIMM_C he aa BATTERY connectors stacked TAPI T PARALLEL SERIAL 1 control panel connector PANEL mouse keyboard connectors stacked MOUSE KYBD USB connectors USB 2 serial port 2 connector SERIAL2 chassis intrusion z A switch connector j main power input connector POWER_1 SEC cartridge connector SLOT1 ti microprocessor front of com fan connector FAN 5 video memory Lig upgrade socket CD in connectors CD IN VIDEO_UPGRADE primary EIDE video interface connector connector MONITOR IDE1
93. ions for listing and prioritizing the available boot devices in your system Boot Device Priority e Exclude From Boot Device Priority Device Controller Priority The Boot Device Priority option lists all bootable devices hard disk drives CD ROM drives and so on that are controlled by the system BIOS and any Plug and Play network adapters installed in the computer The Exclude From Boot Device Priority option allows you to remove from the Boot Device Priority option any boot devices that you want the system to ignore during system start up The Device Controller Priority option lists the system BIOS controller any non Plug and Play devices such as network adapter cards and any secondary controller cards such as a SCSI adapter installed in the computer Z NOTE Non Plug and Play devices appear in this list aS Adapters without ID support A 6 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual When determining the order of devices to boot from the system first consid ers the order of the devices listed under the Device Controller Priority option then the order of devices under Boot Device Priority To specify your priority preferences order the devices under these categories so that the highest priority controller is at the top of the Device Controller Priority option and the highest priority device is at the top of the Boot Device Priority option Order the remainder of the devices in the Boo
94. isk drive n MU exransioncard cage riser board system board o 2 283 KTA Figure 6 1 Internal View of the Mini Tower Computer Removing and Replacing Parts on the Mini Tower Chassis 6 3 Computer Cover release button Figure 6 2 Computer Cover Removal To remove the computer cover follow these steps L Tum off power to all peripherals and disconnect the AC power cable from its electrical outlet 2 Remove the padlock if one is installed 3 Facing the left side of the computer press the release button at the bottom left comer of the front bezel 4 Lift the bottom of the cover allowing it to pivot up toward you 5 Disengage the tabs that secure the cover to the top of the chassis and lift the cover away Before you reinstall the cover fold all cables out of the way so that they do not interfere with the cover or with proper airflow inside the computer 6 4 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Front Bezel tab release retaining hooks 2 Figure 6 3 Front Bezel Removal To remove the front bezel follow these steps l 2 a Press the tab release marked with the icon Tilt the bezel away from the chassis Disengage the two retaining hooks at the bottom of the bezel and pull the bezel away from the chassis Removing and Replacing Parts on the Mini Tower Chassis 6 5 Eject Power and Reset Buttons front bezel
95. iskette tape drive interface cable 3 5 inch diskette drive DC power cable 5 25 inch drive bay and bracket hard disk drive EIDE cable primary EIDE interface connector IDE1 DSKT connector secondary EIDE interface connector IDE2 Figure 4 6 Drive Hardware Externally Accessible Drive Assemblies The following subsections contain removal replacement procedures for drives installed in the externally accessible drive bays Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 3 5 Inch Diskette Drive Assembly drive mounting screws 2 3 5 inch diskette drive assembly ka e latches 2 amp A front of computer hooks 2 Figure 4 7 3 5 Inch Diskette Drive Removal To remove the 3 5 inch diskette drive assembly follow these steps L Disconnect the DC power cable and the interface cable from the back of the diskette drive 2 Press the two 3 5 inch diskette drive assembly latches to the left to release the assembly Rotate the left side of the assembly up and lift the assembly out of the chassis 3 Remove the two drive mounting screws from the left side of the drive and remove the drive from the bracket When you replace the 3 5 inch diskette drive be sure that the mounting holes on the right side of the drive engage the two hooks on the bracket Removing and Replacing Parts on the Low Profile Chassis 49 5 25 Inch Drive Assembly front of compu
96. ive system board 4 4 1 Serial port test failure Faulty I O chip defective system board 4 4 2 Parallel port test failure Faulty system board 4 4 3 Math coprocessor failure Faulty microprocessor chip or system board 4 4 4 Cache test failure Defective microprocessor or system board System Error Messages System error messages typically are presented on the screen during the POST but can occur any time an error is detected by the system System messages are very useful in troubleshooting the system Some of these messages require operator intervention to solve others indicate fatal errors that must be solved before the system will reboot Table 3 2 lists the system error messages that can occur and the probable cause for each message Table 3 2 System Error Messages Message Definition Probable Causes Address mark not found BIOS found faulty disk sector or could not find particular disk sector Faulty diskette tape drive subsystem or hard disk drive subsystem defec tive system board Attachment failed to respond Diskette drive or hard disk drive controller cannot send data to associated drive Faulty interface cable or connector Bad command or file name Command entered does not exist or is not in pathname specified Bad command Bad error correction code ECC on disk read Controller has failed Diskette drive or hard disk drive controller detected u
97. ize computer 5 6 mini tower computer 6 6 resource conflicts eliminating 2 5 riser board removal low profile computer 4 15 midsize computer 5 17 mini tower computer 6 19 OptiPlex NX1 computer 7 11 S SEC cartridge heat sink assembly about 1 16 4 19 removal low profile computer 4 19 removal midsize computer 5 21 removal mini tower computer 6 23 removal OptiPlex NX1 computer 7 15 secondary cache memory 1 3 server based diagnostics 2 6 service related information 1 18 1 24 SMART technology 1 4 specifications technical 1 35 stand removal midsize computer 5 4 OptiPlex NX1 computer 7 3 subsystems audio 1 5 expansion 1 13 memory 1 17 NIC 1 7 SVGA 1 5 switch AC voltage selection 1 8 low profile computer 1 10 midsize computer 1 11 mini tower computer 1 12 OptiPlex NX1 computer 1 13 system battery removal low profile computer 4 20 midsize computer 5 22 mini tower computer 6 24 OptiPlex NX1 computer 7 16 system board component locations 1 18 features 1 18 jumper locations 1 20 removal low profile computer 4 16 removal midsize computer 5 18 removal mini tow er computer 6 20 removal OptiPlex NX1 computer 7 12 service data 1 16 system diagnostics See diagnostics system error messages 3 3 system power supply removal low profile computer 4 12 removal midsize computer 5 14 removal mini tower computer 6 16 removal OptiPlex NX1 computer 7 8 Sy
98. kette or hard disk drive Seek operation System could not find Faulty diskette or hard failed particular address mark disk drive on disk Shutdown System board chip Defective system board failure faulty Time of day Backup battery low Defective battery or clock stopped faulty chip defective system board Time of day not Time or Date setting in Incorrect Time or Date set System Setup program settings or defective incorrect or system bat system battery tery bad Timer chip counter 2 Timer circuit on system board malfunctioning Defective system board failed Unexpected Keyboard mouse con Improperly seated interrupt in troller malfunctioning or DIMMs or faulty protected mode one or more DIMMs keyboard mouse improperly seated controller chip defective system board Write Write fault fault CL On selected drive MS DOS cannot write to diskette or hard disk drive Faulty diskette or hard disk drive Beep Codes and Error Messages 3 7 3 8 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual CHAPTER 4 Removing and Replacing Parts on the Low Profile Chassis This chapter provides procedures for removing the components assemblies and subassemblies in the Dell OptiPlex GX1 low profile computer If you are servicing a midsize mini tower or OptiPlex NX1 Net PC chassis use Chapter 5 6 or 7 as appropriate for your sy
99. lled default speed 266M HZ Microprocessor Install jumper if the microprocessor s speed internal speed is 266 MHz otherwise the jumper should not be installed BUS66M External system Install jumper to set the external system clock clock speed at 66 MHz otherwise the external system clock speed operates at 100 MHz default BIOS Reserved J umper not installed default PSWD Password Install to enable the password feature enable or disable default One set of speed jumpers must have a jumper plug installed otherwise the system defaults to 350 MHz Interrupt Assignments Table 1 2 Interrupt Assignments IRQ Line Used By Available IRQO Generated by system timer IRQ1 Generated by keyboard controller IRQ2 Generated internally by interrupt controller to enable IRQ8 through IRQ15 IRQ3 Generated by super I O controller to indicate that the device con nected to the serial port COM2 or COM 4 requires service IRQ4 Generated by super I O controller to indicate that the device con nected to the serial port COM 1 or COM 3 requires service IRQ5 Available for use by an expansion card IRQ6 Generated by super I O controller to indicate that diskette or tape drive requires service IRQ7 Generated by super I O controller to indicate that device con nected to parallel port requires service IRQ8 Generated by RTC alarm event System Overview 1 1 Table 1 2 Interrupt Assignments continued IRQ Line
100. low these steps CAUTION The video memory module can be damaged when the hard disk drive bracket is removed if the hard disk drive s DC power cable and the interface cable are not disconnected first L Disconnect the DC power cable and the interface cable from the back of each hard disk drive installed in the hard disk drive bracket 2 Remove the screw that secures the hard disk drive bracket to the front of the chassis 3 Grasp the handle on the front of the bracket and rotate the front of the bracket up until the hooks are free from the chassis 4 Liftthe hard disk drive bracket out of the computer When you reinstall the hard disk drive bracket place the lowerback tab of the hard disk drive bracket into position be sure that the opening in the lower back tab is over the alignment tab on the chassis then rotate the front of the bracket down into position 5 12 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Hard Disk Drive drive mounting screws 4 for drive mounting screws bottom mounted drive 4 for side mounted drive Q ee Ng hard disk amp EE S g drive bracket G A amp Q f hard disk drive N amp Figure 5 12 Hard Disk Drive Removal To remove the hard disk drive follow these steps L Remove the hard disk drive bracket 2 Remove the four screws that attach the hard disk drive to the hard disk drive bracket One hard disk drive attaches to the
101. lure Keyboard Keyboard mouse con Defective keyboard controller troller failed mouse controller defec failure tive system board Memory address line failure at address read value expecting value Memory data line failure at address read value expecting value Memory double word logic fail ure at address read value expecting value Memory odd even logic failure at address read value expecting value Memory write read failure at address read value expecting value During memory test value read at address was incorrect Faulty or improperly seated DIM Ms or defec tive system board Beep Codes and Error Messages 35 Table 3 2 System Error Messages continued Message Definition Probable Causes Memory alloca tion error Software in use con flicts with operating system application or utility Faulty application or utility Memory tests terminated by keystroke Memory test did not complete POST memory test terminated by pressing the spacebar No boot device available System does not recog nize diskette drive or hard disk drive from which it is trying to boot Faulty diskette diskette tape drive subsystem hard disk drive hard disk drive subsystem or no boot disk in drive A No boot sector on hard disk drive Configuration settings in System Setup pro gram incorrect or operating system corrupted Incorrect conf
102. may be set to 278h 3BCh or 378h Otherwise the port may be disabled Parallel Mode Controls whether system s built in parallel port acts as an AT compatible unidirectional or PS 2 compatible bidirectional port IDE Hard Disk Enables system s built in EIDE hard disk drive interface Diskette Enables system s built in diskette drive controller Speaker Enables onboard speaker System Setup Program A 5 Table A 1 System Setup Options continued Option Function Microprocessor Displays type of microprocessor installed Level 2 Cache Displays size of level 2 cache memory installed System Memory Displays entire amount of installed memory detected in system except for memory on EMS expansion cards Video Memory Displays amount of video memory on the sys tem board Service Tag Displays system s five character service tag number Asset Tag Displays the asset tag number up to ten char acters if one is assigned Device List Device List provides access to the Device List screen where you can choose from alist of available boot devices to boot from and specify the order in which your computer attempts to boot from these devices To view the Device List screen press Ctrl and the right arrow key CAUTION Only a technically knowledgeable person should change 1 the settings in the Device List screen The Device List screen see Figure A 2 provides three opt
103. microprocessor heat sink assembly video memory upgrade module if present and the DIMMs from the old system board and install them on the replacement board Also if the original system board has a NIC connector ensure that the replace ment system board has a NIC connector When you reinstall the system board before you slide the system board back to lock it in position push down near each slot to engage the grounding clip onto its corresponding tab Push evenly on both sides of the system board as you slide it into position do not twist the system board 712 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual System Board Components The following subsections contain procedures for removing replacing system board components see Figures 1 12 and 1 13 DIMMs To remove a DIMM from one of the three DIMM sockets follow these steps 1 Locate the three DIMM sockets 2 To remove a DIMM push outward on the DIMM socket s securing clips until the DIMM is released from its socket Sum 1 securing clips 2 Figure 7 12 DIMM Removal 3 Lift the DIMM away from the socket 4 Reinstall the replacement DIMM by pressing the DIMM fully into the socket while closing the securing clips to lock the DIMM into the socket securing clips 2 Figure 7 13 DIMM Installation 5 Replace all assemblies and cables previously removed Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7 13
104. mputer move the front end of the system power supply toward you and lift it up to disengage the power supply from the slot in the chassis 5 Lift the system power supply from the computer When you reinstall the system power supply place the powersupply detent link over the pin on the power supply as you position the power supply in the chassis opening 6 16 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Expansion Cards The computer has a removable expansion card cage The expansion card cage contains the riser board and any installed expansion cards Dell recommends that you remove the expansion card cage first before removing or installing expansion cards If you are not removing any expansion cards leave the external cables attached to them Expansion Card Cage 7 chassis bottom slot expansion card cage lever Figure 6 16 Expansion Card Cage Removal To remove the expansion card cage follow these steps 1 Rotate the lever toward the back of the computer until it stops in the upright position 2 Slide the expansion card cage out of the computer To replace the expansion card cage align the tabs on the left and right sides of the expansion card cage with the slots on the back and bottom of the chassis With the securing lever in its extended position slide the expansion card cage into place Removing and Replacing Parts on the Mini Tower Chassis 6 17 Expansi
105. n Cards The computer has a removable expansion card cage The expansion card cage contains the riser board and any installed expansion cards Dell recommends that you remove the expansion card cage first before removing or installing expansion cards If you are not removing any of the expansion cards leave the extemal cables attached to the expansion cards Expansion Card Cage lever og gt expansion card cage i E ISA expansion card SC end support side support hole Figure 4 11 Expansion Card Cage Removal To remove an expansion card cage follow these steps 1 Rotate the lever toward the back of the computer until it stops in the upright position 2 Lift the expansion card cage up and away from the computer To replace an expansion card cage keep it flush against the chassis to ensure that the lever engages the notch in the chassis when the lever is depressed If reinstalling an ISA expansion card into the expansion card cage be sure to slip the end of the ISA expansion card into the plastic ISA expansion card end support The ISA expansion card end support should not be removed how ever if it is accidentally removed reinstall it by first inserting its top tab into the side support hole and then sliding the bottom two tabs into the two support holes on the chassis floor Removing and Replacing Parts on the Low Profile Chassis 4 13 4 14 Expansion Card expansion card expansion card connector
106. n connector from the 3 pin connector on the system board labeled FAN located between the SERIAL2 connec tor and the MONITOR connector 4 Release the two securing clips near the base of the heat sink from the metal standoffs 5 Locate and press inward on the SEC cartridge release latches located directly on top of the SEC cartridge adjacent to the heat sink assembly until the latches click 6 Lift the SEC cartridge heat sink assembly out of its guide bracket assembly connector on the system board NOTE When installing the SEC cartridge heat sink assembly press outward eX on the SEC cartridge release latches and then carefully orient the assembly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its connector The SEC cartridge release latches will click into the locked posi tion as the assembly is seated System Battery IA A battery BATTERY socket Figure 5 22 System Battery Installation To remove the system battery follow these steps Ll If possible boot the system and enter the System Setup program Then record important system configuration information see Appendix A Sys tem Setup Program for details 5 22 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 2 Turn off power to all peripherals and disconnect the AC power cable from its electrical outlet 3 Remove the computer cover 4 Remove the expansion card cage and loc
107. n reinstalling the optional stand align the front edge of the stand with the groove between the front bezel and the computer cover Move the stand until the locator pins engage the holes in the side of the computer The locator pins are keyed for correct installation Computer Cover securing buttons 2 front of computer Figure 7 3 Computer Cover Removal 7 4 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual To remove the computer cover follow these steps L Remove the padlock if one is installed from the padlock ring security cable slot padlock ring service access lock Figure 7 4 Service Access Lock 2 Using a 2 Phillips screwdriver rotate the service access lock 1 4 turn clockwise to the position shown in Figure 7 4 3 Press the two securing buttons until the cover is free to swing up 4 Raise the back of the cover and pivot it toward the front of the computer 5 Lift the cover off the hooks at the front of the chassis Four plastic hooks at the front of the cover secure it to the chassis Before you reinstall the cover fold all cables out of the way so that they do not interfere with the cover or with proper airflow inside the computer You may have to press gently downward on the back edge of the cover while engaging the locking mechanism Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7 5 Control Panel cable retention tabs
108. ncorrectable read error Hard disk drive or associated controller defective Faulty diskette tape drive subsystem or hard disk drive subsystem defec tive system board Beep Codes and Error Messages 33 Table 3 2 System Error Messages continued Message Definition Probable Causes Data error Computer received un recoverable data read error from diskette or hard disk drive Faulty diskette diskette drive or hard disk drive Decreasing available memory Read write failure during POST prevents system from using avail able memory One or more DIMMs faulty or improperly seated Diskette drive O seek failure Diskette drive 1 seek failure Diskette tape drive con troller could not locate specific sector or track Faulty or improperly inserted diskette incorrect configuration settings in System Setup program loose diskette tape drive interface cable or loose power cable Diskette read failure Failure occurred while system attempted to read diskette Faulty diskette faulty or improperly connected diskette tape drive inter face cable or loose power cable Diskette sub system reset failed System could not suc cessfully issue reset command to diskette controller Faulty diskette tape drive controller defective sys tem board Diskette write protected Diskette write protect feature activated Diskette write prot
109. nd later in this chapter You have removed the computer cover e You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided Recommended Tools Most of the procedures in this chapter require the use of one or more of the following tools Small flat blade screwdriver Wide flat blade screwdriver and 2 Phillips screwdrivers e 1 4 inch nutdriver Tweezers or long nose pliers Also use a wrist grounding strap as explained in the next section Precaution ary Measures Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7 1 7 2 Precautionary Measures Before you perform any of the procedures in this chapter take a few moments to read the following waming for your personal safety and to prevent damage to the system from ESD WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT Before you start to work on the system perform the following steps in the sequence listed L Tum off the computer and any attached peripherals 2 Disconnect the computer and any attached peripherals from their power sources to reduce the potential for personal injury Also dis connect any telephone or telecommunication lines from the computer 3 Wait 5 seconds after powering down the computer before disconnecting a peripheral from the computer or removing a compo nent from the computer s system board to avoid possible damage t
110. next section Observing the Boot Routine Observing the Boot Routine After you have performed an extemal visual inspection as described in the previous section you should boot the system and while the boot routine is running observe the system for any indications of problems NOTE Most of the steps in this procedure require observation of system functions and indications some of which can occur simultaneously It may be necessary to reboot the system several times in order to complete all of these steps To observe problem indications during the boot routine follow these steps l Insert a copy of the Dell Diagnostics Diskette into drive A Tum on all peripherals and the computer If the computer is already on press the reset button or lt Ctrl gt lt Alt gt lt Del gt to reboot the system 2 Checkthe power supply fan Does the fan run normally Yes Proceed to step 3 No Troubleshoot the system power supply 3 Watch the Num Lock Caps Lock and Scroll Lock indicators on the upper right comer of the keyboard After all three indicators flash momentarily the Num Lock indicator should light up and remain on Do these indicators flash on and off within approximately 10 seconds after the boot routine starts Yes Proceed to step 4 No Troubleshoot the system power supply If the troubleshooting pro cedure indicates that the system power supply is operational troubleshoot the system board 4 During the boot rout
111. nual Table A 1 System Setup Options continued Option Function Auto Power On Allows you to set the day and time you want the system to power on automatically The time uses the 24 hour format Power Management With the Power Management option enabled DPMS monitors and most EIDE drives automatically switch into low power mode during periods of system inactivity CAUTION Before enabling this feature check the monitor documentation to make sure that the system has a DPMS compliant monitor Otherwise there is a risk of damaging the monitor NOTE Not all EIDE hard disk drives support this feature Enabling this feature for a drive that does not support it may cause the EIDE drive to become inoperable until the system is restarted and the Power Management option is disabled Wakeup On LAN Wakeup On LAN determines whether the Wakeup On LAN feature is set to Off or On You must reboot your system before a change takes effect Sound Enables On or disables Off the integrated sound controller NIC Enables On or enables without PXE support On PXE Off or disables Off the integrated NIC Mouse Enables or disables the built in PS 2 compatible mouse port Serial Port 1 Configures system s built in serial port 1 Serial Port 2 Configures system s built in serial port 2 Parallel Port Configures system s built in parallel port The port s I O address
112. o the system board Wear a wrist grounding strap and clip it to an unpainted metal sur face such as the padlock loop on the back of the chassis If a wrist grounding strap is not available periodically touch an unpainted metal surface on the back of the computer to discharge any static charge from your body Avoid touching components and contacts on a card and avoid touching pins on a chip to prevent static electricity damage Inside the Computer Figure 7 1 shows an intemal view of the interior of the OptiPlex NX1 computer and identifies major components for orientation Refer to this illustration as needed when performing the component removal replacement procedures in this chapter Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual power supply system board hard disk drive expansion card cage Figure 7 1 Internal View of the OptiPlex NX1 Computer Optional Stand locator pins 2 on underside of stand front bezel Figure 7 2 Optional Stand Removal To remove the optional stand if one is installed follow these steps 1 Place the right side of the computer on a flat work surface 2 Unscrew the captive screw using your fingers or a wide flat blade screwdriver Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7 3 3 Pull the optional stand away from the computer Disengage the locator pins that position and help secure the stand to the computer Whe
113. o enter the System Setup program If you wait too long and the operating system begins to load into memory let the system complete the load operation then shut down the system and try again Starting the diagnostics causes the Dell logo to appear on the monitor screen followed by a message indicating that the diagnostics is loading Before the diagnostics loads a program tests the portion of main memory Basic Troubleshooting 2 7 RAM required for loading the diagnostics If a main memory error is detected a message indicates which DIM M has failed If no errors are found in main memory the diagnostics loads and the Diagnostics Menu appears Observe the monitor screen for the Diagnostics Menu This menu lets you choose the following options or exit to the MS DOS prompt e Run Quick Tests Runs selected tests from all test groups to quickly locate a failure or to indicate where further testing is needed to isolate a failure Run All Tests Runs all tests for a thorough test of the system Run Specific Tests Tests a particular area or subsystem If the Diagnostics Menu does not appear check with the network admin istrator to determine if the service partition was removed from the hard disk drive If it is not possible to run the hard disk based diagnostics and if you are prepared to remove the computer cover see Internal Visual Inspection found earlier in this chapter Otherwise see Getting Help f
114. old the optional stand to the computer 54 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Computer Cover securing buttons 2 a 33 3343 wy Za 33 33 3 333933 C VAN x 3398302 3745 p d front of computer Figure 5 3 Computer Cover Removal To remove the computer cover follow these steps L Tum off power to all peripherals and disconnect the AC power cable from its electrical outlet 2 Press in on the two securing buttons until the cover is free to swing up 3 Raise the back of the cover and pivot it toward the front of the computer 4 Lift the cover off the hooks at the front of the chassis Four plastic hooks on the inside front part of the cover secure it to the chassis Before you reinstall the cover fold all cables out of the way so that they do not interfere with the cover or with proper airflow inside the computer Removing and Replacing Parts on the M idsize Chassis 5 5 Eject Power and Reset Buttons computer cover upside down eject button power button e Figure 5 4 Eject Power and Reset Button Removal To remove the eject power and reset buttons follow these steps l Laythe computer cover upside down on a flat work surface with the back of the cover facing you 2 To remove the 3 5 inch diskette drive eject button pull gently on the plastic part of the button until it comes free 3 To remove the power button or the reset button use a sm
115. omputer 4 10 tape drive removal midsize computer 5 11 tape drive removal mini tower computer 6 12 E EIDE subsystem 1 4 eject button removal low profile computer 4 5 midsize computer 5 6 mini tower computer 6 6 error messages 3 3 Ethernet controller 1 7 expansion features 1 13 expansion card cage removal low profile computer 4 13 midsize computer 5 15 6 17 mini tower computer 6 17 OptiPlex NX1 computer 7 9 Index 3 expansion card removal low profile computer 4 14 midsize computer 5 16 mini tower computer 6 18 OptiPlex NX1 computer 7 10 expansion card slots low profile computer 1 14 midsize computer 1 14 mini tower computer 1 16 OptiPlex NX1 computer 1 14 extemal connectors low profile computer 1 10 midsize computer 1 11 mini tower computer 1 12 OptiPlex NX1 computer 1 13 extemal diskette drive kit low profile midsize and mini tower computers 2 9 external visual inspection 2 2 F flash memory 1 4 front bezel removal mini tower computer 6 5 front panel features 1 9 front panel insert removal low profile computer 4 6 midsize computer 5 7 mini tower computer 6 7 6 8 H hard disk drives bracket removal midsize computer 5 12 bracket removal mini tower computer 6 14 options 1 22 removal low profile computer 4 11 removal midsize computer 5 13 hard disk drives continued removal mini tow er computer 6 15 removal OptiPlex NX1 comput
116. on Card expansion card retaining screw N U card mounting di bracket card slot opening riser board expansion card connector Figure 6 17 Expansion Card Removal To remove an expansion card follow these steps L Disconnect any cables from the expansion card being removed 2 Remove the expansion card cage 3 Remove the retaining screw from the card mounting bracket 4 Grasp the expansion card by its corners and carefully remove it from the expansion card connector 6 18 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Riser Board riserboard riser board mounting screws 2 expansion card cage Figure 6 18 Riser Board Removal To remove the riser board follow these steps l 2 Remove the expansion card cage and all expansion cards Place the expansion card cage on a flat work surface with the riser board facing up Remove the riserboard mounting screws Slide the riser board away from the release handle until it stops then lift the riser board away from the expansion card cage Removing and Replacing Parts on the Mini Tower Chassis 6 19 System Board slots 5 tabs 5 Figure 6 19 System Board Removal To remove the system board follow these steps l Disconnect all cables from their connectors at the back of the computer 2 Remove the expansion card cage 3 Disconnect all cables from the system board 4
117. ontrol panel cable as you remove it from the chassis 5 8 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Drives Figure 5 7 shows an example of drive hardware that can be installed in the computer Refer to this figure when you perform any of the procedures in the following subsections system DC power i diskette tape drive Lowe cable interface cable PPIY 3 5 inch diskette NA pA d lt S S hard disk drive bracket EIDE cable 9 9 b primary EIDE amp interface S connector IDE1 DSKT connector secondary EIDE interface connector IDE2 Figure 5 7 Drive Hardware Externally Accessible Drive Assemblies The following subsections contain removal replacement procedures for drives installed in the extemally accessible drive bays Removing and Replacing Parts on the Midsize Chassis 5 9 5 10 3 5 Inch Diskette Drive Assembly bracket mounting screw drive mounting screws 2 hooks 2 front of computer Figure 5 8 3 5 Inch Diskette Drive Removal To remove the 3 5 inch diskette drive follow these steps L Disconnect the DC power cable and the interface cable from the back of the 3 5 inch diskette drive 2 Remove the bracket mounting screw 3 Rotate the left side of the 3 5 inch diskette drive assembly up and lift the assembly out of the chassis 4 Remove the two drive mounting screws from the left side of the drive and remove the drive from
118. optional secondary EIDE integrated NIC interface connector connector ENET p microphone jack M IC IDE2 audio line out p diskette tape drive P interface connector jack LINE OUT DSkT audio line in ATI multimedia riser board connector RISER System board jumpers jack LINE IN connector AM C Figure 1 12 System Board Components New 1 18 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual optional NIC microphone connector serial port 2 jack MIC ENET microprocessor NND Ca ideo connector fan connector connector SERIAL2 E E line outjack MONITOR FAN connectors LINE OUT USB connectors 2 stacked USB MOUSE KYBD line in jack LINE IN Y parallel serial port 1 EE connectors stacked CD ROM audio PARALLEL SERIAL 1 interface Kyra a connector CD_IN telephony m connector TAPI video memory upgrade socket VIDEO UPGRADE ATI multimedia connector AM C riser board connector RISER secondary EIDE SEC cartridge connector SLOT1 DIMM sockets 3 DIMM_A DIMM_C main power input connector POWER_1 interface 3 3 V power input connector IDE2 f connector QY A POWER_2 battery socket BATTERY system board f F HO F jumpers primary EIDE diskette tape drive chassis intrusion switch interface connector interface connector connector INTRUSION IDE1 DSKT
119. or EIDE devices such as EIDE CD ROM drives and EIDE tape drives that are using the built in EIDE controller set the appropriate Drive option to Auto NOTE The OptiPlex NX1 chassis supports only one hard disk drive and no CD ROM arive or tape drive Reserved Memory Designates a region of system board memory that can be supplied by an expansion card This feature should not be enabled unless an expansion card that requires special address ing is installed CPU Speed Indicates processor speed at which system boots the processor s rated speed or a slower compatibility speed which disables cache Num Lock Determines whether keyboard s Num Lock mode is activated System Setup Program A 3 Table A 1 System Setup Options continued Option Function Chassis Intrusion Enables or disables the chassis intrusion fea ture If computer cover is removed when the option is set to Enabled the setting changes to Detected An alert message is also dis played during the boot sequence at system start up To clear this field and allow future intrusions to be detected enter the System Setup program during the system s POST and press any key This action changes the setting from Detected to Enabled The option can also be set to Disabled to turn off the chassis intrustion feature or Enabled Silent to pre vent the alert message from being displayed at system start up DAC Snoop When enable
120. ound later in this chapter The hard disk based diagnostics consists of the following test groups RAM Tests Check all the directly addressable RAM System Set Tests Check the computer s system board components and verify their related functions Video Tests Verify proper operation of the video controller and the video control circuitry Keyboard Tests Verify the correct operation of the keyboard and the key board controller chip Mouse Test Checks the functionality of the mouse controller and the operation of the mouse keys Hard Disk Drive Tests Check the hard disk drive controller and the stor age capability of the hard disk drive Serial Ports Tests Check the computer s interface with external devices connected through the serial ports Parallel Port Tests Check the computer s interface with extemal devices connected through the parallel port Network Interface Tests Verify the basic operation of the NIC including read and write access to its registers and intemal transmit and receive capability Diskette Based Diagnostics The OptiPlex GX1 GX1p systems use either diskette based or server based diagnostics The OptiPlex NX1 systems use either serverbased hard disk based or optionally diskette based diagnostics using an external diskette drive 2 8 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual kit connected to the computer as shown in Figure 2 1 and descr
121. oval low profile computer 4 10 removal midsize computer 5 11 removal mini tow er computer 6 12 chassis configurations 1 2 differences 1 2 intrusion detection 1 6 similarities 1 3 chassis intrusion detection 1 6 computer block diagram low profile computer 1 28 block diagram midsize computer 1 30 block diagram mini tow er computer 1 31 block diagram OptiPlex NX1 computer 1 34 Index computer continued components illustrated low profile computer 1 10 components illustrated midsize computer 1 11 components illustrated mini tower computer 1 12 components illustrated OptiPlex NX1 computer 1 13 controls and indicators 1 8 cover removal low profile computer 4 4 cover removal midsize computer 5 5 cover removal mini tower computer 6 4 cover removal OptiPlex NX1 computer 7 4 diagnostics See diagnostics DMA channel assignments 1 22 expansion features 1 13 features 1 1 1 3 front panel views 1 9 internal views 1 10 1 12 1 13 interrupt assignments 1 21 jumper information 1 20 orientation information 1 23 service information 1 17 specifications technical 1 35 troubleshooting 2 1 upgrade options 1 16 connectors extemal 1 13 on back of low profile computer 1 10 on back of midsize computer 1 11 on back of mini tower computer 1 12 on back of OptiPlex NX1 computer 1 13 system board 1 18 control panel removal low profile compute
122. p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 2 Turn off power to all peripherals and disconnect the AC power cable from its electrical outlet 3 Remove the computer cover 4 Remove the expansion card cage and locate the battery in the front right comer of the system board adjacent to the DIMM connectors CAUTION If you pry out the battery with a blunt object be careful not to touch the system board with the object Ensure that the object is inserted between the battery and the socket before attempting to pry out the battery Otherwise you may damage the system board by prying off the socket or by breaking traces on the system board 5 Remove the battery by carefully prying it out of its socket with your fingers or with a blunt nonconducting object such as a plastic screwdriver There is a danger of the new battery exploding if it is incorrectly installed When you replace the system battery orient the new bat tery with the facing up see Figure 7 16 Replace the battery only with the same or equivalent type recommended by the manu facturer Discard used batteries according to the manufacturer s instructions 6 Insert the battery into the socket with the positive side labeled facing upwards and snap it into place 7 Replace the expansion card cage replace the computer cover reconnect all cabling and reboot the system 8 Enter the System Setup program and configure the syst
123. power LED PCI1 connector Wakeup On LAN SS power connector Figure 1 7 Riser Board for the OptiPlex NX1 Computer Low Profile Computer s Expansion Card Slots The OptiPlex GX1 low profile computers have three expansion card slots The riser board has two ISA expansion card connectors and two PCI expansion card connectors One PCI expansion card connector and one ISA expansion card connector share a single expansion card slot resulting in a total of three expansion card slots see Figure 1 8 The low profile computers have a passive riser board with no PCI to PCI bridge The riser board includes the P1 connector for connecting the NIC to the riser board cable and an LED See Figure 1 8 If the LED is on the riser board is receiving power if off the riser board is not receiving power LED Saat c P1 connector D iB ISA1 ISA2 connector L connector C gt a pc A connector HDLED N Nl HF connector PCI1 connector Figure 1 8 Riser Board for the Low Profile Computer Midsize Computer s Expansion Card Slots The OptiPlex GX1 GX1p midsize computers have five expansion card slots The riser board for the GX1 is offered in two options The GX1p uses the option 2 riser board Option 1 is a passive riser board with no PCI to PCI bridge Option 1 has three ISA expansion card connectors and three PCI expansion card connectors One PCI expansion card connector and one ISA expansion card connector sha
124. r 1 14 pin assignments DC power connectors OptiPlex GX1 computer 1 25 DC power connectors OptiPlex NX1 computer 1 32 Plug and Play expansion cards 1 13 port assignments low profile computer 1 10 midsize computer 1 11 mini tower computer 1 12 OptiPlex NX1 computer 1 13 POST beep codes 3 1 power button removal low profile computer 4 5 midsize computer 5 6 mini tower computer 6 6 power indicator 1 9 power supply about 1 8 1 24 1 31 cables low profile computer 1 27 cables midsize and mini tower computers 1 30 cables OptiPlex NX1 computer 1 33 DC voltage ranges OptiPlex GX1 1 24 DC voltages ranges OptiPlex NX1 1 32 flea power 1 8 power distribution 1 34 power distribution low profile computer 1 28 power distribution midsize computer 1 30 power distribution mini tower computer 1 31 power distribution OptiPlex NX1 computer 1 34 removal low profile computer 4 12 removal midsize computer 5 14 removal mini tower computer 6 16 removal OptiPlex NX1 computer 78 service data 1 24 voltage ranges OptiPlex GX1 computer 1 24 voltage ranges OptiPlex NX1 computer 1 32 Index 5 6 Power Supply 115 230 VAC 1 8 precautionary measures low profile computer 4 1 midsize computer 5 1 mini tower computer 6 1 OptiPlex NX1 computer 7 2 R removing and replacing parts low profile computer 4 1 reset button removal low profile computer 4 5 mids
125. r 4 7 midsize computer 5 8 mini tower computer 6 9 OptiPlex NX1 computer 7 6 controllers audio 1 5 diskette tape drive 1 5 EIDE 1 4 Ethernet NIC 1 7 video 1 5 controls and indicators front panel views 1 8 hard disk drive access indicator 1 9 NIC activity indicator 1 7 NIC link integrity indicator 1 7 power button 1 9 power indicator 1 9 reset button 1 8 cover removal low profile computer 4 4 midsize computer 5 5 mini tower computer 6 4 OptiPlex NX1 computer 7 4 D DC power cables low profile computer 1 27 cables midsize and mini tower computers 1 29 cables OptiPlex NX1 computer 1 34 connector pin assignments low profile computer 1 25 connector pin assignments midsize computer 1 25 connector pin assignments mini tower computer 1 25 connector pin assignments OptiPlex NX1 computer 1 32 1 33 distribution low profile computer 1 28 distribution midsize computer 1 30 distribution mini tower computer 1 31 distribution OptiPlex NX1 computer 1 34 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service M anual DC power continued power supply connectors 1 33 voltage ranges OptiPlex GX1 systems 1 32 voltage ranges OptiPlex NX1 systems 1 32 diagnostics system about 1 18 diskette based 2 8 2 10 hard disk based 2 7 on OptiPlex NX1 computer 2 9 running 2 5 server based 1 18 2 6 DIMMs installation low profile
126. re 5 14 Expansion Card Cage Removal To remove an expansion card cage follow these steps 1 Rotate the lever toward the back of the computer until it stops in the upright position 2 Lift the expansion card cage up and away from the computer To replace an expansion card cage keep the cage flush against the chassis to ensure that the lever engages the notch when the lever is depressed Removing and Replacing Parts on the Midsize Chassis 5 15 5 16 Expansion Card retaining screw expansion card card mounting expansion card bracket connector KAL card slot opening riser board Figure 5 15 Expansion Card Removal To remove an expansion card follow these steps l 2 3 4 Disconnect any cables from the expansion card being removed Remove the expansion card cage Remove the retaining screw from the card mounting bracket Grasp the expansion card by its corners and carefully remove it from the expansion card connector Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Riser Board riserboard mounting screws 2 slots 2 riser board Figure 5 16 Riser Board Removal To remove the riser board follow these steps l 2 Remove the expansion card cage and all expansion cards On a flat work surface turn the expansion card cage over with the riser board facing up Remove the riserboard mounting screws Slide the riser board down until it s
127. re a single expansion card slot resulting in a 1 14 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual total of five expansion card slots see Figure 1 9 Option 2 is an active riser board with a PCI to PCI bridge Option 2 has two ISA expansion card connec tors and five PCI expansion card connectors Two PCI ISA expansion card connector pairs each share an expansion card slot again resulting in a total of five expansion card slots see Figure 1 10 Both riser board options include the P1 connector for connecting the NIC to the riser board cable and an LED If the LED is on the riser board is receiving power if off the riser board is not receiving power ISA3 connector ary ISA2 LED o ag connector La ISA1 Aa connector m a e PCI3 connector x 10LoO 1 e PCI2 HDLED connector OD connector PCI1 connector Figure 1 9 Riser Board for the Midsize Computer Option 1 PCI5 connector LED E ISA2 o mnl PCI4 connector ie connector nec pa connector L HDLED pc AN P1 connector connector PCI2 connector PCI1 connector Figure 1 10 Riser Board for the Midsize Computer Option 2 System Overview 1 15 Mini Tower Computer s Expansion Card Slots The OptiPlex GX1 GX1p mini tower computers have seven expansion card slots The riser board has four ISA expansion card connectors and five PCI expansion card connector
128. remove it 3 Remove the four screws attaching the 5 25 inch drive to the mounting plate and lift the drive out of the mounting plate see Figure 6 12 Align the front of the drive flush with the tab at the front of the 5 25 inch drive mounting plate Figure 6 12 5 25 Inch Drive Removal When you replace the 5 25 inch drive align the front of the drive flush with the tab at the front of the mounting plate Insert the four screws and tighten them in the order stamped on the bottom of the 5 25 inch drive mounting plate Removing and Replacing Parts on the Mini Tower Chassis 6 13 Hard Disk Drive Bracket drive cage Slide rail chassis slot hinge tabs 3 sliding tab Figure 6 13 Hard Disk Drive Bracket Removal To remove the hard disk drive bracket follow these steps L Disconnect the DC power cable and the interface cable from the back of each hard disk drive installed in the hard disk drive bracket 2 Remove the screw that secures the hard disk drive bracket to the drive cage in the chassis 3 Grasp the bracket and rotate it outward from the chassis until the sliding tab clears the slide rail on the drive cage 4 Lift the hard disk drive bracket up slightly to free the hinge tabs and remove it from the computer When you reinstall the hard disk drive bracket insert the bracket s hinge tabs into the chassis slot so that the tabs hook over the slot Then rotate the bracket toward the d
129. rews must be secure enough to ensure a firm connection Verify that any devices attached to the serial and parallel port connectors are properly connected Each of the serial and parallel port interface cables must be firmly attached to an appropriate connector on the back of the computer as well as to the interface connector on the device The captive screws that secure these connectors at each end of the interface cable must be secure enough to ensure a firm connection Verify that the video interface cable is firmly attached to the video connec tor on the back of the computer and to the connector on the back of the monitor For proper connection of the video monitor see the documentation for the monitor Inspect all external monitor controls for any obvious damage or improper settings For proper settings of the video monitor controls see the documentation for the monitor Inspect the keyboard to ensure that no keys are sticking If one or more keys are sticking it may be necessary to replace the keyboard Inspect the exterior of the computer including all controls and indicators and all useraccessible data storage devices for any signs of physical damage 2 2 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Does the inspection reveal any problems Yes Refer to the parts removal and replacement procedure in Chapters 4 5 6 or 7 aS appropriate for your system No Proceed to the
130. rive cage and fit the bracket s sliding tab on the drive cage slide rail 6 14 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Hard Disk Drive drive mounting screws 4 for side mounted drive C sliding tab C hard disk drive hard disk drive bracket gt T drive mounting screws 4 for bottom mounted drive Figure 6 14 Hard Disk Drive Removal To remove the hard disk drive assembly follow these steps L Remove the hard disk drive bracket 2 Remove the four screws that attach the hard disk drive to the hard disk drive bracket One hard disk drive attaches to the hard disk drive bracket at the sides of the drive The other hard disk drive attaches to the hard disk drive bracket at the bottom of the hard disk drive 3 Slide the drive out of the hard disk drive bracket Removing and Replacing Parts on the M ini Tower Chassis 6 15 System Power Supply power supply powersupply detent link securing tab Figure 6 15 System Power Supply Removal To remove the system power supply follow these steps L Disconnect the AC power cable from the back of the system power supply 2 Free the system power supply from the securing tab labeled RELEASE gt and rotate it upward until it locks Press the securing tab to release the power supply 3 Disconnect the DC power cables from the system board and the drives 4 Facing the left side of the co
131. rives e Physical size and power supply types the midsize and mini tower systems use the same power supply Due to the physical differences in the four chassis configurations a separate parts removal and replacement chapter Chapters 4 through 7 is provided for each chassis type 12 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Chassis Similarities All four chassis configurations have the following similarities The same system board e Identical operational characteristics same BIOS POST memory microprocessor extemal I O ports and so on e Identical diagnostics diagnostic beep codes and diagnostic screen error messages see Chapters 1 through 3 and Appendix A However the OptiPlex NX1 computer has no built in diskette drive and requires a special setup process to run the diskette based diagnostics as described in Chapter 2 Standard Features The features described in the following subsections are common to all chassis configurations Pentium II Microprocessor All systems in the OptiPlex GX1 GX1p and OptiPlex NX1 computer families incorporate the Pentium Il microprocessor for improved operating speeds and overall performance Some of the major enhancement features of the Pentium Il microprocessor include intemal 16 KB data and instruction caches internal math coprocessor and the MM X instruction set for high performance in complex multimedia and communications environments The
132. rror messages to indicate a failure you should use the system diagnostics to run the appropri ate tests to help isolate the source of the problem See Running the System Diagnostics in Chapter 2 POST Beep Codes If the monitor cannot display error messages during the POST the system may emit a series of beeps that identifies the problem or that can help you identify a faulty component or assembly Table 3 1 lists the beep codes that may be generated during the POST Most beep codes indicate a fatal error that pre vents the system from completing the boot routine until the indicated condition is corrected When the system emits a beep code record the code and then find it in Table 3 1 If the table does not lead to the source of the problem run the appropriate tests in the system diagnostics to assist in troubleshooting the problem Table 3 1 POST Beep Codes Beep Code Error Probable Causes 1 1 3 NVRAM write read failure Defective system board 1 1 4 BIOS checksum failure Faulty BIOS or defective system board 1 2 1 Programmable interval timer Defective system board failure 1 2 2 DMA initialization failure 1 2 3 DMA page register write read failure Beep Codes and Error Messages 31 Table 3 1 POST Beep Codes continued Beep Code Error Probable Causes 131 Main memory refresh verifi cation failure Faulty or improperly seated DIMM or defective system board 1 3 2 No m
133. s Verify proper operation of the video controller and the video control circuitry e USB1 Tests Check the USB interface registers and the USB controller e Serial Port 1 Tests Check the computer s interface with external devices connected through serial port 1 Serial Port 2 Tests Check the computer s interface with external devices connected through serial port 2 Parallel Port 1 Test Checks several internal functions of the parallel port Mouse Test Checks the functionality of the mouse controller and the operation of the mouse keys e Keyboard Tests Verify the correct operation of the keyboard and the key board controller chip e Disk 0 Tests Check the hard disk drive controller and the storage capabil ity of the hard disk drive For a complete description of the serverbased diagnostics see Server Based Diagnostics in the online Network Administrators Guide Hard Disk Based Diagnostics OptiPlex NX1 Systems Only The hard disk based diagnostics contains tests that aid in troubleshooting all major components of the system If it is not possible to run the server based diagnostics or if the serverbased diagnostics fails to reveal the source of a suspected hardware problem run the hard disk based diagnostics by follow ing these steps L Tum on or reboot the system 2 Press lt Ctrl gt lt Alt gt lt F 105 immediately after you see the following message Press Ctrl Alt Enter t
134. s Two PCI expansion card connectors share expansion card slots with two ISA connectors resulting in a total of seven expansion card slots see Figure 1 11 The riser board is active incorporating PCI to PCI bridging The mini tower riser board includes the P1 connector for connecting the NIC to the riser board cable and an LED If the LED is on the riser board is receiv ing power if off the riser board is not receiving power ISA4 LED ag AA ISA3 pes i gx PCI4 ISA1 o _ 0 S il T P1 connector PCI2 m l HDLED connector Figure 1 11 Riser Board for the Mini Tower Computer Il i PCI1 Upgrade Options The system board has various accommodations for system upgrades including e Microprocessor upgrade Main memory expansion e Video memory expansion These upgrades are summarized in the following subsections and installation procedures are provided for the various chassis configurations in Chapters 4 5 6 and 7 Microprocessor L2 Cache Upgrades On the OptiPlex GX1 GX1p and OptiPlex NX1 systems the microprocessor and secondary L2 cache memory are implemented in an SEC cartridge heat sink assembly Upgrade to a higher performance microprocessor is accom plished by snapping out the old assembly and installing an upgrade assembly as higher performance microprocessors become available 1 16 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1
135. s devices to transfer video stream data to the graphics controller for example MPEG 2 decoding for digital video disk DVD applications or to receive video stream data from the graphics controller to the device for example TV Out circuitry or to do both simultaneously Most of the video stream data trans fers occur on the AMC without congesting the PCI bus bandwidth The 40 pin AMC connector shown in Figure 1 12 consists of three ports into the graphics controller a digital video stream DVS port for video input into the graphics controller a multimedia peripheral port M PP for video input and out put from the graphic controller and an interintegrated circuit I2C compatible serial control port for controlling the attached devices A fourth port audio mixing bus AMB is not supported by the system To route mixed audio from an AM C compliant adapter card to the system board CD ROM audio cables must be attached from the adapter card s CD ROM audio input and CD ROM audio output connections to the AM C connector See the AM C compliant adapter card s documentation for more information Telephony Application Programming Interface The OptiPlex GX1 GX1p and OptiPlex NX1 systems include a telephony appli cation programming interface TAPI that allows the system board audio to interface with a modem to facilitate speakerphone functionality The TAPI compliant telephony input is a mono source with a maximum signal level of 2 Vms
136. s Service Manual Figure 1 19 DC Power Cables for the Low Profile Computer System Overview 1 27 system board system power supply 3 VDC _ battery riser board power RIC management INVRAM P1 and NIC logic PCI1 PWRGOOD pol PSON RISER P1 5 VFP 5 VDC 5 VDC 5 VDC 5 VDC 5 VDC 5 VDC 5 VDC eit 12 VDC 12 VDC 12 VDC 12 VDC ISA2 12 VDC 12 VDC 12 VDC P2 13 3 VD POWER2 optional drive 3 5 inch diskette drive internal hard disk drive main memory sockets DIMM A DIMM_B b DIMM C MICROPROCESSOR 12 VDC processorcore regulator 3 3 VDC core VCC 2 1 to 3 5 VDC FAN PANEL USB MOUSE NOTE 5 VFP is routed to the integrated NIC logic on the system board and to P1 on the riser board Figure 1 20 DC Power Distribution for the Low Profile Computer 128 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Figure 1 21 DC Power Cables for the Midsize and Mini Tower Computers 1 29 System Overview keyboard controller riser board 13 3 VDC management RTC J system
137. stem Unless otherwise noted each procedure assumes the following e You have performed the steps in Precautionary M easures found later in this chapter You have removed the computer cover e You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided Recommended Tools Most of the procedures in this chapter require the use of one or more of the following tools Small flat blade screwdriver Wide flat blade screwdriver and 2 Phillips screwdrivers e 1 4 inch nutdriver Tweezers or long nose pliers Also use a wrist grounding strap as explained in the next section Precaution ary Measures Precautionary Measures Before you perform any of the procedures in this chapter take a few moments to read the following waming for your personal safety and to prevent damage to the system from ESD Removing and Replacing Parts on the Low Profile Chassis 4 1 42 WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT Before you start to work on the system perform the following steps in the sequence listed L Tum off the computer and any attached peripherals 2 Disconnect the computer and any attached peripherals from their power sources to reduce the potential for personal injury Also dis connect any telephone or telecommunication lines from the computer 3 Wait 5 seconds after powering down the computer before
138. stem Setup program about A 1 key combination to enter A 1 options A 3 screens A 2 system unit See computer system See computer Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service M anual T tape drives about 1 5 removal low profile computer 4 10 removal midsize computer 5 11 removal mini tower computer 6 12 technical specifications 1 35 telephony application programming interface 1 6 tools recommended low profile computer 4 1 midsize computer 5 1 mini tower computer 6 1 OptiPlex NX1 computer 7 1 troubleshooting boot routine 2 3 diagnostics 2 5 extemal visual inspection 2 2 initial procedures 2 1 internal visual inspection 2 4 resource conflicts 2 5 service related information 1 18 1 22 using beep codes 3 1 U upgrade options 1 16 V video memory controller 1 5 for low profile computer 4 18 for midsize computer 5 20 for mini tower computer 6 22 for OptiPlex NX1 computer 7 14 upgrading 1 17 visual inspection external 2 2 intemal 2 4 voltage ranges OptiPlex GX1 computers 1 24 OptiPlex NX1 computers 1 32 voltage selection switch AC low profile computer 1 10 midsize computer 1 11 mini tower computer 1 12 W Wakeup On LAN 1 7 warnings 4 1 5 1 6 1 7 2 Index 7 8 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service M anual
139. system The integrated 10 100 M bps 3Com PCI 3C905B TX Ethernet NIC subsystem supports the Wakeup On LAN feature and the 10BASE T and 100BASE T stan dards The NIC subsystem connects to the Ethemet network through a single RJ 45 connector on the back of the computer The RJ 45 connector and the NIC interface circuitry are mounted on the system board The NIC connector on the computer s back panel has the following indicators A yellow activity indicator flashes when the system is transmitting or receiving network data A high volume of network traffic may make this indicator appear to be in a steady on state A green link integrity indicator lights up when there is a good connection between the network and the NIC When the green indicator is off the System is not detecting a physical connection to the network Network Cable Requirements The computer s NIC connector RJ 45 is designed for attaching to an unshielded twisted pair UTP Ethernet cable The other end of the cable con nects to an RJ 45 jack wall plate or to an RJ 45 port on a UTP concentrator or hub depending on the network configuration Chapter 4 Using Integrated Devices in the Reference and Installation Guide provides instructions for connecting the computer to and configuring it for use on an Ethemet network For OptiPlex NX1 systems refer to the online Net work Administrator s Guide Full Set of I O Ports For desktop connectivity the Opt
140. t Device Prior ity option according to your preferences Move any devices that you want the system to ignore during system start up into the Exclude From Boot Device Priority option NOTE The system defines Hard Drive C in the Boot Device Priority option as the first hard disk drive attached to the highest priority device controller Therefore if you have a SCSI adapter installed in your computer and you want the SCSI drive O to be drive C you must move the SCSI adapter item to the top of the Device Controller Priority option To change the order of the devices press lt Ctrl gt and the up or down arrow key If you want to revert to the original Boot Device Priority option settings press lt Ctrl gt lt Del gt NOTE If you exit the Device List option by pressing lt Esc gt or lt Alt gt lt b gt with out making any changes the Boot Sequence option is set to the Device List option Dell Computer Corporation www dell com Device List System OptiPlex GX1 400 Setup BIOS Version XXX Boot Device Priority The DEVICE LIST contains devices Diskette drive A that may be bootable The system LANDesk Service Agent for 3C090X attempts to boot from the devices in the Hard drive C list as ordered If you CD ROM device ESC or ALT B from this menu the displayed order becomes the boot selection Exclude from Boot Device Priority Ctrl Ins moves items between Boot Device Priority and Exclude from Boot Device Priority onl
141. tem Setup program and confirm that 8 MB is shown in the Video Memory option If the total memory is listed incorrectly repeat steps 1 through 6 to reseat the video memory upgrade module and verify that the computer acknowledges the module 7 Run the system diagnostics Video Test Group to test the new video memory upgrade module Microprocessor To take advantage of future options in processor speed and functionality you can replace the microprocessor on your system board with any Dell supported microprocessor upgrade The microprocessor upgrade kit is shipped with an SEC cartridge heat sink assembly which includes the microprocessor micro processor heat sink and L2 cache memory module You may also have to reseat or replace an SEC cartridge heat sink assembly during normal maintenance SEC Cartridge Heat Sink Assembly SEC cartridge release latches 2 heat sink SEC heat sink clips 2 cartridge guide bracket assembly metal standoffs 2 Figure 5 21 SEC Cartridge Heat Sink Removal Removing and Replacing Parts on the Midsize Chassis 5 21 To remove the SEC cartridge heat sink assembly follow these steps L Remove the system power supply WARNING The SEC cartridge heat sink assembly can get extremely a hot during system operations Be sure that the assembly has had suf ficient time to cool before touching it 2 Locate the SEC cartridge heat sink assembly 3 Disconnect the microprocessor fa
142. tem battery is functioning correctly Removing and Replacing Parts on the Midsize Chassis 5 23 5 24 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual CHAPTER 6 Removing and Replacing Parts on the Mini Tower Chassis This chapter provides procedures for removing the components assemblies and subassemblies in the Dell OptiPlex GX1 GX1p mini tower computers If you are servicing a low profile midsize or OptiPlex NX1 Net PC chassis use Chapter 4 5 or 7 aS appropriate for your system Unless otherwise noted each procedure assumes the following e You have performed the steps in Precautionary Measures found later in this chapter You have removed the computer cover e You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided Recommended Tools Most of the procedures in this chapter require the use of one or more of the following tools Small flat blade screwdriver Wide flat blade screwdriver and 2 Phillips screwdrivers e 1 4 inch nutdriver Tweezers or long nose pliers Also use a wrist grounding strap as explained in the next section Precaution ary Measures Precautionary Measures Before you perform any of the procedures in this chapter take a few moments to read the following waming for your personal safety and to prevent damage to the system from ESD Removing and Replacing P
143. ter drive mounting screws 4 aa 9 Figure 4 8 5 25 Inch Drive Assembly Removal To remove a 5 25 inch drive assembly follow these steps l 2 Remove the 3 5 inch diskette drive assembly Disconnect the DC power cable and the interface cable from the back of the 5 25 inch drive Lift the 5 25 inch drive assembly straight up and out of the chassis Lay the 5 25 inch drive assembly upside down then remove the four Screws attaching the drive to the bracket When you replace the 5 25 inch drive place the front of the drive toward the front of the bracket then install the four screws but do not tighten them Align the screws with the score marks on the bracket and tighten the screws in the order stamped on the bottom of the bracket Check the alignment of the computer cover around the 5 25 inch drive bezel Adjust the drive forward or backward on the bracket to align it 4 10 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Hard Disk Drive Assembly hard disk drive mounting screw holes 4 tabs 2 SES captive screw we i Ng gt N Qo notches 2 Ni e front of computer Figure 4 9 Hard Disk Drive Assembly Removal To remove the hard disk drive follow these steps L Disconnect the DC power cable and the interface cable from the back of the drive 2 Loosen the captive screw that secures the hard disk drive bracket to the chassis 3 Pivotth
144. the new bat tery with the facing up see Figure 4 19 Replace the battery only with the same or equivalent type recommended by the manu facturer Discard used batteries according to the manufacturer s instructions 6 Insert the battery into the socket with the positive side labeled facing upwards and snap it into place 74 Replace the expansion card cage replace the computer cover reconnect all cabling and reboot the system 8 Enter the System Setup program and configure the system using the infor mation from the printouts you made earlier 9 Turn off the computer wait 10 or more minutes and then reenter the Sys tem Setup program to ensure that the date and time are still correct indicating that the system battery is functioning correctly Removing and Replacing Parts on the Low Profile Chassis 4 21 4 22 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual CHAPTER 5 Removing and Replacing Parts on the Midsize Chassis This chapter provides procedures for removing the components assemblies and subassemblies in the Dell OptiPlex GX1 GX1p midsize computer If you are servicing a low profile mini tower or OptiPlex NX1 Net PC chassis use Chapter 4 6 or 7 as appropriate for your system Unless otherwise noted each procedure assumes the following e You have performed the steps in Precautionary M easures found later in this chapter You have removed
145. tics To run the diskette based diagnostics follow these steps L Insert a copy of the Dell Diagnostics Diskette into the diskette drive Tum on all peripherals and the computer 2 For OptiPlex NX1 systems enter the System Setup program set Diskette Drive A to 3 5 Inch L44 MB and set Primary under Drives to Auto see Figure A 1 Then press lt Alt gt lt B gt to reboot the system Starting the diagnostics causes the Dell logo to appear on the monitor screen followed by a message indicating that the diagnostics is loading Before the diagnostics loads a program tests the portion of main memory RAM required for loading the diagnostics If a main memory error is detected a message indicates which DIMM has failed If no errors are found in main memory the diagnostics loads and the Diagnostics Menu appears 3 Observe the monitor screen for the Diagnostics Menu This menu lets you choose the following options or exit to the MS DOS prompt e Run Quick Tests Runs selected tests from all test groups to quickly locate a failure or to indicate where further testing is needed to isolate a failure Run All Tests Runs all tests for a thorough test of the system Run Specific Tests Tests a particular area or subsystem If the Diagnostics Menu does not appear check the diskette drive connec tions insert a copy of the diagnostics diskette into the diskette drive and reboot the system If the Diagnostics Menu still does
146. tops then lift the riser board away from the expansion card cage Removing and Replacing Parts on the M idsize Chassis 5 17 System Board Screw slots 5 I Lf p 9p a tabs 5 Figure 5 17 System Board Removal To remove the system board follow these steps Ll Disconnect all cables from their connectors at the back of the computer 2 Remove the expansion card cage 3 Disconnect all cables from the system board 4 Remove the screw that secures the system board to the bottom of the chassis ui Slide the system board toward the front of the chassis until it stops 6 Carefully lift the system board out of the chassis be sure to lift evenly and not twist the system board NOTES If you are replacing the system board remove all DIMMs the TA video memory upgrade module if present the single edge contact SEC cartridge heat sink assembly and the guide bracket assembly from the old sys tem board and install them on the replacement board Also set the jumpers on the new system board so that they are identical to those on the old board unless a microprocessor upgrade is being installed If the original system board has a NIC connector ensure that the replacement board has a NIC connector When you reinstall the system board before you slide the system board back to lock it in position push down near each slot to engage the grounding clip onto its corresponding tab Push evenly on both si
147. uipped with Self M onitoring and Analysis Reporting Technology SM ART which warns you at system start up if your hard disk drive has become unreliable This waring occurs only if you use hard disk drives with SM ART technology 14 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Integrated Diskette Tape Drive Controller The OptiPlex GX1 GX1p and OptiPlex NX1 systems are equipped with an inte grated diskette drive controller PIIX4e that can support a maximum of two non EIDE diskette and tape drives via a 34 pin DSKT connector located on the system board The low profile chassis can accommodate only one external drive device diskette drive or tape drive Other chassis configurations can accommodate two extemal drive devices NOTES If the diskette drive and tape drive are both attached to the diskette drive controller on the system board only the diskette drive is configured in the System Setup program as Diskette Drive A or Diskette Drive B The tape drive is then listed as Not Installed under either the Diskette Drive A or Diskette Drive B option The OptiPlex NX1 system contains an integrated controller and diskette drive connector but is not equipped with a diskette drive If you run the diskette based diagnostics this computer requires an extemal diskette drive kit as described in Chapter 2 Basic Troubleshooting Integrated SVGA Subsystem The OptiPlex GX1 GX1p and OptiPlex NX1 systems
148. uring lever slots 2 tabs 2 Figure 7 8 Expansion Card Cage Removal To remove the expansion card cage follow these steps lL Disconnect any external cables from the expansion card if one is installed 2 Disconnect the DC power cable and the EIDE cable from the back of the hard disk drive 3 Rotate the securing lever toward the back of the computer until it stops in the upright position 4 Lift the expansion card cage up and away from the computer To replace an expansion card cage keep it flush against the left side of the chassis to ensure that the two cage slots engage the tabs on the left side of the computer Press gently downward on the back right comer of the expansion card cage while rotating the securing lever forward Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7 9 Expansion Card card slot opening expansion card connector riser board card mounting bracket retaining screw expansion card Figure 7 9 Expansion Card Removal To remove the expansion card follow these steps l Disconnect any external cables from the expansion card 2 Remove the expansion card cage 3 Remove the retaining screw from the card mounting bracket 4 Grasp the expansion card by its corners and carefully remove it from the expansion card connector 7 10 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Riser Board expansion card cage tabs
149. video memory upgrade module and automatically changes the sys tem configuration information in the System Setup program 7 14 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual 6 Enter the System Setup program and confirm that 8 MB is shown in the Video Memory option If the total memory is listed incorrectly repeat steps 1 through 6 to reseat the video memory upgrade module and verify that the computer acknowledges the module 74 Run the system diagnostics Video Test Group to test the new video mem ory upgrade module Microprocessor To take advantage of future options in processor speed and functionality you can replace the microprocessor on your system board with any Dell supported microprocessor upgrade The microprocessor upgrade kit is shipped with a single edge contact SEC cartridge heat sink assembly which includes the microprocessor microprocessor heat sink and L2 cache memory module You may also have to reseat or replace an SEC cartridge heat sink assembly during normal maintenance SEC Cartridge Heat Sink Assembly SEC cartridge release latches 2 heat sink SEC heat sink cartridge clips 2 guide bracket assembly metal standoffs 2 Figure 7 15 SEC Cartridge Heat Sink Removal Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7 15 To remove the SEC cartridge heat sink assembly follow these steps L Remove the system power supply W
150. y PgDn next Icof 2 PgUp prev Device Controller Priority Pentium II Processor 400 MHz System BIOS boot devices Level 2 Cache 512 KB Integrated System Memory 32 MB SDRAM Video Memory 4 MB SGRAM Service Tag Xxxxxx Asset Tag XXXXX Ctrl Del original list Ceri A Y move item Ctrl return Ctrl Ins move to other list 7 Figure A 2 Sample Device List Screen System Setup Program A 7 A 8 Dell OptiPlex GX1 GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual Index Numbers 3 5 inch diskette drive removal low profile computer 4 9 midsize computer 5 10 mini tower computer 6 11 5 25 inch drive assembly removal low profile computer 4 10 midsize computer 5 11 mini tower computer 6 12 A AC power receptacle 1 10 AC voltage selection switch low profile computer 1 10 midsize computer 1 11 mini tower computer 1 12 universal power supply 1 8 ATI multimedia channel 1 6 audio connectors 1 7 controller 1 5 battery removal low profile computer 4 20 midsize computer 5 22 OptiPlex NX1 computer 7 16 beep codes 3 1 BIOS flash ROM 1 4 block diagram low profile computer 1 28 midsize computer 1 30 mini tower computer 1 31 OptiPlex NX1 computer 1 34 boot routine observing while troubleshooting 2 3 bracket hard disk drive removal midsize computer 5 12 mini tower computer 6 14 C cabling verification 2 2 CD ROM drives rem

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