Manuale d’uso / di manutenzione del prodotto 100-Mbps del fabbricante Dell
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Information in this document is subje ct to cha nge without notice . 1996 Dell Comput er Corp ora tio n. All rights reserve d . Reproduc tion in an y mann er whatsoeve r without the wri tten perm i s sion of Dell Co mp uter Co rpo ratio n is stri ctly forb idden .
v Contents Chapter 1 System Ov erv iew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Dual-Processor Capability . . . .
vi Chapter 2 Basic Trouble sho oting . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Initial User Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 External Visual Inspection . . . . . . . . . .
vii Terminator Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 Add-In Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 System Battery . . . . . . . . . . . . . . .
viii Figure 4-16. Expansion-Card Cage Removal . . . . . . . . . . . . . . . . . . . . . . 4-17 Figure 4-17. Expansion-Card Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 Figure 4-18. Riser Board Removal . . . . . . . . . . . . . . .
ix.
R ead This First W arnings, Cautio ns, and N otes Throughout this manual, there may be blocks of text printed in bol d type or in italic type. These blocks are warnings, cautions, a nd notes, and they are used as follows: NO TE: A NO TE pr ovides helpful information about using the computer system.
System Overview 1-1 Chapter 1 System Overview T his service manual covers the Dell ® OptiPlex ® GX pr o high-speed, upgrad- able desktop systems, which use the Intel ® Pe ntium ® Pro family of microprocessors. These Dell systems incorporate the high-pe rformance PCI local bus as well as the ISA expansion bus.
1-2 Dell Opt iPlex GX pro System s Ser vice M anual S ystem Features In addition to the standard features found in a traditional personal computer , t he Dell OptiPlex GX pr o desktop systems include the following new and/or advanced fea tures: • Dual-processor ca pability .
System Overview 1-3 Figure 1-1. System Unit Ori entation CAUTION: T o avoid possible data or file structure corruptions, the front-panel reset button sh ould be used onl y when the system cannot be r ebooted by pressin g <Ctrl><Alt><De l>.
1-4 Dell Opt iPlex GX pro System s Ser vice M anual Figure 1-2. Front-Panel Features Figure 1-3. Internal V iew reset button hard-disk drive access indicator power button power indicator parallel port.
System Overview 1-5 Dual-Processor Capability W ith the installation of a microprocessor add-in ca rd in the terminator card slot, the system unit becomes a dual-processing system. The add-in card’ s micro- processor must have the same freque ncy and cache size as the system boar d’ s microprocessor .
1-6 Dell Opt iPlex GX pro System s Ser vice M anual Hard-Disk Drive Options The hard-disk drive bracke t is located next to the drive bays at the front of the system unit. The system unit can contain up to two, one-inch-high, hard-disk drives or one, 1.
System Overview 1-7 NIC GX pr o systems contain either an integrated 10-Mbps or 10/100-Mbps 3Com NIC. GX pr o systems containing the 10-Mbps Ethernet NIC have a built-in int e- grated 3Com 3C915 NIC chip. GX pr o systems containing the 10/100-Mbps Ethernet NIC have a built-in integrated 3Com 3C 916 Ethernet NIC chip.
1-8 Dell Opt iPlex GX pro System s Ser vice M anual SMART Support The system has SMAR T-compliant hard-disk drives and SMAR T support in the system BIOS, which warns you at system start-up if a hard-disk drive has become unreliable. S ystem Unit The following subsections provide servi ce-r elated information about the system unit.
System Overview 1-9 1 Pin 1 1 — PSON# should measur e between +4 and +5 VD C except when the power b utton on the fr ont panel is pr essed, taking PSON# to its active-low s tate. 2 Pin 19 — Ther mal fan-speed co ntro l (TFSC) is a pow er-supply in put signa l used to con trol power-su pply fan s peed in s pecial applicatio ns.
1-10 Dell OptiPlex G X pro System s Ser vice M anual Figure 1-7. DC Power Connector P7 DC Power Distribution Figures 1-8 and 1-9 provide the following information about DC power distribution: • Powe.
System Overview 1-1 1 Figure 1- 9. P ower Distri bution P3 +5 VDC +12 VDC –12 VDC +12 VDC +12 VDC –12 VDC 3.5-inch diskette drive system power supply PSON# +5 VFP +5 VDC –5 VDC +12 VDC –12 VDC.
1-12 Dell OptiPlex G X pro System s Ser vice M anual System Board Layout The subsections that follow provide service-related information about the sys- tem board components.
System Overview 1-13 Main Memory The four DIMM sockets on the system board can accommodate combinations of 16-, 32-, 64-, and 128-MB DIMMs up to a total memory ca pacity of 512 MB. The system is shipped with high-speed (60-ns) EDO DIMMs that provide ECC functionality when used with the Intel 82440FX PCIset.
1-14 Dell OptiPlex G X pro System s Ser vice M anual I nterrupt Assignments T able 1-2. Jumper Descriptions Jumper Descripti on Default Setting PSWD Password enable/disa ble. Jumper installe d, activates password fea ture. Installed (password feature enable d) BIOS Used for internal Dell debug tool.
System Overview 1-15 D MA Channel Assi gnments IRQ8 Generated by keyboard c ontroller for each tick of R TC. IRQ9 A vailable for use by expansion card. IRQ10 A vailable for use by expansion card. IRQ1 1 A vailable for use by expansion ca rd. IRQ12 Generated by keyboard controller to indicate that mous e’ s output buf fer is full.
1-16 Dell OptiPlex G X pro System s Ser vice M anual T echnic al Specifications T able 1-5. T echnical Specif ications Microprocessor Microprocessor type . . . . . . . . Intel Pentium Pro microprocessor Microprocessor speed . . . . . . . 200 or 180 MHz First-level cache .
System Overview 1-17 Syst em Clo cks System clock . . . . . . . . . . . . . . 60 or 66 MHz (matches external processor speed) Diskette/communicatio ns ports . . . . . . . . . . . . . . . . . . . . 24 MHz from the system clock Memory Architecture . . .
1-18 Dell OptiPlex G X pro System s Ser vice M anual Ports (continued) Internally accessible: EIDE hard-disk drive . . . . two 40-pin connectors on PCI local bus Diskette drive . . . . . . . . . . 34-pin connector Vid eo V ide o type. . . . . . . . . .
System Overview 1-19 z Physica l Height . . . . . . . . . . . . . . . . . . . 16. 5 c m ( 6 . 5 in c he s) W idth . . . . . . . . . . . . . . . . . . . . 41 . 9 c m ( 1 6 . 5 in c he s) Depth . . . . . . . . . . . . . . . . . . . . 44.5 cm (17.5 inches) Environmental W eight .
1-20 Dell OptiPlex G X pro System s Ser vice M anual.
Basic T roubl eshooti ng 2-1 Chapter 2 Basic T roubleshooting T his chapter describes basic troubleshooting procedures that can help you diagnose a computer system problem. These procedure s can often reveal the source of a problem or indicate the correct starting point for troubleshooting the system.
2-2 Dell Opt iPlex GX pro System s Ser vice M anual E xternal V isual Inspection The external visual inspection co nsists of a quick inspection of the exterior of the system unit, the monitor , the ke yboard, any peripherals, and cables. While performing the visual inspection, make any necessary cor rections.
Basic T roubl eshooti ng 2-3 8. Insp ect the exterior of the system unit, includi ng all controls and indica- tors, and all user-accessible data storage devices for any signs of physical damage. Does the inspection reveal any problems? Ye s . Procee d to the appropriate procedure in Chapter 4, “Removing and Replacing Parts.
2-4 Dell Opt iPlex GX pro System s Ser vice M anual • System err or messages: These messages ca n indicate problems or pro- vide status information. If a system error message is displayed, see T able 3-2. • Beep codes: A beep code is a series of beeps that indicates an error con- dition.
Basic T roubl eshooti ng 2-5 T o reseat the microprocessor , remove it from its socket and reinstall it as described in “Microprocessor/Hea t Sink Assembly” in Chapter 4. T o reseat a DIMM, remove it from its socket and reinstall it as described in “DIMMs” in Chapter 4.
2-6 Dell Opt iPlex GX pro System s Ser vice M anual T o start the diagnostics, turn off the system uni t, insert a diagnostics diskette into drive A, and then turn on the system unit. Starting the diagnostics causes the Dell logo screen to appear on the monitor screen, followed by a message indicating that the diagnostics is loading.
Beep C odes and E rror Mes sages 3 -1 Chapter 3 Beep Codes and Error Messages T his chapter describes beep c odes and system error messages that can occur during system start-up or , in the case of some failures, during normal system operation.
3-2 Dell Opt iPlex GX pro System s Ser vice M anual 1-3-1 Main-memory refresh ver ifi- cation fa ilure Faulty or improperly seated DIMMs or defective system board 1-3-3 1-3-4 1-4-1 1-4-2 2-1-1 through.
Beep C odes and E rror Mes sages 3 -3 S ystem Error Messages T able 3-2 lists (in alphabetical order) system error messages that can appear on the monitor screen. These messages can help you find the source of a problem. Some of these error message s indicate fatal errors.
3-4 Dell Opt iPlex GX pro System s Ser vice M anual T able 3-2. System Error Messa ges Message Definition Probable Causes Address mark not found Attachment failed to respond BIOS found faulty disk sector or could not find particular disk sector . Diskette drive or hard- disk drive controller cannot send data to associated dri ve.
Beep C odes and E rror Mes sages 3 -5 Diskette sub- system reset failed System could not suc- cessfully issue reset command to di skette controller . Faulty diskette/tape drive controller (defec tive sys- tem board). Diskette write pro- tected Diskette wri te-pro tect feature activated.
3-6 Dell Opt iPlex GX pro System s Ser vice M anual Invalid con- figuration information - please run SETUP program System Setup program contains incorrect system configuration settings. Incorrect conf iguration settings in System S etup program or faulty battery .
Beep C odes and E rror Mes sages 3 -7 Memory address line failure at address , read value expect - ing value Memory da ta line fa ilur e at addres s , read value expecti ng value Memory do uble word l.
3-8 Dell Opt iPlex GX pro System s Ser vice M anual No boot device avail- able 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.
Beep C odes and E rror Mes sages 3 -9 Sector not found MS-DOS unable to locate sector on diskette or hard-disk drive. Defective sectors on dis- kette or hard-disk drive. Seek error MS-DOS unable to locate specific track on diskette or hard-disk drive.
3-10 Dell OptiPlex G X pro System s Ser vice M anual Warning- Temperature is too high At system start-up, BIOS detected that one or both micro- processors have overheated. One or both micro- processors are too hot. Write fault Write fault on selected drive MS-DOS cannot write to diskette or hard-disk drive.
Removin g and Re placing Parts 4 -1 Chapter 4 Removing and Replacing Parts T his chapter provides procedures f or removing the components, assemblies, and subassemblies in the system unit. Unless otherwise noted, each procedure assumes the following: • Y ou have performed the steps in “Pr ecautionary Measures” f ound later in this chapte r .
4-2 Dell Opt iPlex GX pro System s Ser vice M anual P recautionary Me asures Before you perform any of the proce dures in this chapter , take a f ew moments to read the following war ning for your per sonal safety and to prevent damage to the computer system from ESD.
Removin g and Re placing Parts 4 -3 F loor Stand Figure 4-1. Floor Stand Removal T o remove the floor stand, follow these steps: 1. Place lef t side of the system unit on a flat work surface. 2. Unscrew the floor stand scr e w . Use your fingers or a wide flat-blade screwdriver to unscrew the floor stand screw .
4-4 Dell Opt iPlex GX pro System s Ser vice M anual S ystem Unit Cover Figure 4-2. System-U nit Cover Remov al T o remove the system unit cover , follow these steps: 1. Remove t he padlock if one is installed. Figure 4-3. Padlock R emova l 2. Press in the two securing buttons until the cover is free to swing up .
Removin g and Re placing Parts 4 -5 E ject, Power , and Reset B uttons Figure 4-4. E ject, Power , and Reset Button Remova l T o remove the eject, power , and r eset buttons, follow these steps: 1. Lay the system unit cover upside down on a flat work surface, with the back of the cover facing you.
4-6 Dell Opt iPlex GX pro System s Ser vice M anual F ront-Panel Inserts Figure 4-5. Front-Panel Insert Removal T o remove a front-panel insert, follow these steps: 1. Lay the system unit cover upside down on a flat work surface, with the back of the cover facing you.
Removin g and Re placing Parts 4 -7 I ndicator Card Figure 4-6. Indicator Card Removal T o remove the indicator card, follow these steps: 1. Remove the hard-disk drive bracket. See “Drives” found later in this chapter . 2. Remove the spea ker conn ector from the indi cator car d.
4-8 Dell Opt iPlex GX pro System s Ser vice M anual S peaker Figure 4-7. Speaker Removal T o remove the speaker , follow these steps: 1. Re move the hard-disk drive bracket. See “Drives” found later in this chapter . 2. Remove the spea ker conn ector fr om the in dicato r car d.
Removin g and Re placing Parts 4 -9 D rives Figure 4-8 shows an example of drive ha rdware that can be installed in the sys- tem unit. Refer to this figure when you perform any of the proce dures in the following subsections.
4-10 Dell OptiPlex G X pro System s Ser vice M anual Drives in the Drive Cage Figure 4-9. 3.5-Inch Dis kette Drive R em ov a l T o remove a drive from the 3.5-inch diskette dr ive bay , follow these steps: 1. Di sconnect the DC power cable and th e interface cab le from the back of the drive.
Removin g and Re placing Parts 4-1 1 Figure 4- 10 . 5.25 -Inch Dri v e R em ov al T o remove a 5.25-inch drive from the middle or lower dr ive bay , follow these steps: 1. Discon nect the D C power cabl e and the inte rface cab le from the back of the dri ve.
4-12 Dell OptiPlex G X pro System s Ser vice M anual Hard-Disk Drives Figure 4-1 1. Hard-Di sk Drive Bracket Removal T o remove a hard-disk drive bra cket, follow these steps: 1. Disconne ct the DC power c able( s) and the int erfac e cable(s) fr om th e back of th e driv e(s) .
Removin g and Re placing Parts 4-13 Figure 4- 12 . Hard-Di sk Dri ve Remo val T o remove a hard-disk dr ive, follow these steps: 1 . R e m o v e t h e ha rd-disk drive bracket from the sy stem unit. See the preceding procedure . 2. Remove the four screws that secur e the hard-disk drive(s) to the brack et.
4-14 Dell OptiPlex G X pro System s Ser vice M anual S ystem Power Supply Figure 4-13. Power Supply Removal T o remove the system power supply , follow these steps: 1. Disconnect the AC power cable from the back of the power supply . 2. Disconnect the DC power cables from the system board, drives, and expansi on cards.
Removin g and Re placing Parts 4-15 M icroprocessor Fan Figure 4-14. Microprocessor Fan Removal T o remove the system power supply , follow these steps: 1. Rotate the power su pply to the r ight to access t he microprocessor fan connector . See “ System Power Supply ,” found earlier in this chapter .
4-16 Dell OptiPlex G X pro System s Ser vice M anual S ystem Board Com ponen ts The subsections that follow contain procedures for removing system board components.
Removin g and Re placing Parts 4-17 Expa nsion Car ds The system unit has a removable expansion-card cage. The expansion cards fit into connectors on a riser board. Dell rec ommends that you remove the expansion-card cage first before removing or installing expansion cards.
4-18 Dell OptiPlex G X pro System s Ser vice M anual Expansion Card Figure 4-17. Expansion-Card Removal T o remove an expansion car d, follow these steps: 1. Re move the expansion-card cage. See the preceding proce dure. 2. Re move the retaining scr e w from the card-mounting bracket.
Removin g and Re placing Parts 4-19 Riser Board Figure 4-18. Riser Board Removal T o remove the riser board, follow thes e steps: 1. Remove the expansion-car d cage and all expansion cards. See the preceding two procedure s. 2. On a flat work surfac e, turn the expansion-card cage over , with the riser board facing you.
4-20 Dell OptiPlex G X pro System s Ser vice M anual DIMMs Figure 4-19 . DIMM Remov al T o remove a DIMM , push outward on the DIMM socket ’ s securing clips until the DIMM is relea sed from its socket. Then lift t he DIMM away from the socket. Figure 4-20.
Removin g and Re placing Parts 4-21 Microprocessor/Heat Sink Assembly Figure 4-21. Microprocessor Securing Clip T o remove the microproce ssor/heat sink assembly , follow these steps: 1. Remove the micropr ocessor securing clip fr om the micropr ocessor/heat sink assemb ly .
4-22 Dell OptiPlex G X pro System s Ser vice M anual Figure 4-22 . Microprocessor Removal If you ar e installing a new micr opr ocessor/heat sink assembly , you need to place the thermal inte rface pad that comes with the repla cement microprocessor between the microprocessor and the hea t sink before reinstalling the securing clip.
Removin g and Re placing Parts 4-23 T erminator or Add-In Card The system unit may have a terminator card or a se condary microproce ssor (dual-processing systems) on an add-in card installed on the syst em board. This section describes removing and replacing the ter minator card and the add-in card.
4-24 Dell OptiPlex G X pro System s Ser vice M anual Add-In Card Figure 4-24. Add-In Card R e m o v a l T o remove an add-in car d, follow these steps: 1. Gently grip the card’s metal mounting bracket with both han ds. 2. Pull up until the card is freed from the connector .
Removin g and Re placing Parts 4-25 System Battery Figure 4- 25 . Syste m Batter y Remov al T o remove the system battery , follow these steps: 1. If possible, enter the System Setup program, and make a printed copy of the System Set up screens. 2. Rotate the power supply out of the way .
4-26 Dell OptiPlex G X pro System s Ser vice M anual S ystem Board Figure 4-26 . System B oard Remova l T o remove the system board, follow these steps: 1. Disconnect all cables from their connectors at the back of the system unit. 2. Re move the expansion-card cage.
Syste m Setup P rogram A-1 Appendix A System Setup Program T his appendix describes the System Setup program, which is used to change the system configuration information stored in NVRAM on the system board. T o enter the System Setup program, follow these steps: 1.
A-2 Dell Opt iPlex GX pro System s Ser vice M anual S ystem Setup Screens Figure A-1. System Setup Screens Drives: Primary Type Cyls Hds Pre LZ Sec Size Drive 0: Auto 524 32 -1 524 63 540 Drive 1: Non.
Syste m Setup P rogram A-3 T able A-1. System Setup Categories Category Function T ime Resets time on s y s t e m ’ s i n t e r n a l c l o c k . Date Resets date on system’ s interna l calendar . D iskette Drive A Diskette Drive B Identifies type of diskette drives installed.
A-4 Dell Opt iPlex GX pro System s Ser vice M anual 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 require s special addres sing is installed.
Syste m Setup P rogram A-5 Power Management W ith the Power Management c a t e g o r y enabled, DPMS m onitors and most E IDE drives aut omatically s witch into low -power mode during pe riods of s ystem inac tivit y . CAUTI ON: Befor e enabling this fea tur e, check the monitor docume ntation to make sur e the system has a DPMS-compliant monitor .
A-6 Dell Opt iPlex GX pro System s Ser vice M anual Microprocessor Displays type of microprocessor installed. Level 2 Cache Displays size of level-2 cache memory in microprocessor . System Memory Displays entire amount of installed memory detected in system, except for memory on EMS expansion cards.
Index 1 Index Numbers 3.3-V power input connectors , 1-12, 4-16 A AC power receptacle , 1-4 add-in card, removal , 4 -24 audio controller , 1-6 B battery illustrated , 4-25 removing and replacing , 4-.
2 Dell Opt iPlex G X pro System s Ser vice M anual drives , 1-17, 4- 9 DSKT connector , 1-12, 4-16 dual-processing , 1 -5 E ECC DIMMs , 1-2 EDO DIMMs , 1-2, 1-13 EIDE connectors , 1-12, 4-9 , 4-16 eje.
Index 3 L LINE-IN connector , 1-12, 4- 16 line-in jack , 1-4 , 1- 12, 4- 16 M memory, main , 1-2, 1-13 messages, error , 3-3 microphone jack , 1-4, 1- 12 microprocessor release le ver , 4-21 removal ,.
4 Dell Opt iPlex G X pro System s Ser vice M anual subsystems advanced expansion , 1-5 enhanced dual-interfac e EIDE , 1- 6 mai n me mor y , 1-13 video memory , 1-12 switch, voltage selection , 1-4 sy.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Dell 100-Mbps è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Dell 100-Mbps - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Dell 100-Mbps imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Dell 100-Mbps ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Dell 100-Mbps, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Dell 100-Mbps.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Dell 100-Mbps. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Dell 100-Mbps insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
