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Страница 2: ...n Intel and Pentium are registered trademarks and MMX and EtherExpress are trademarks of Intel Corporation MS DOS is a registered trademark of Microsoft Corporation IBM is a registered trademark of International 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 ...

Страница 3: ...Computer Power Supply 1 6 Pin Assignments for the DC Power Connectors 1 7 DC Power Distribution 1 8 System Board 1 10 Main Memory 1 11 System Board Jumpers 1 11 Interrupt Assignments 1 13 DMA Channel Assignments 1 14 Technical Specifications 1 15 Chapter 2 Basic Troubleshooting 2 1 Initial User Contact 2 1 External Visual Inspection 2 2 Observing the Boot Routine 2 3 Server Based Diagnostics 2 4 H...

Страница 4: ...recautionary Measures 4 2 Stand for Vertical Orientation 4 3 Computer Cover 4 4 Control Panel 4 6 Hard Disk Drive 4 7 System Power Supply 4 8 System Board Components 4 9 Expansion Card Cage 4 10 Expansion Card 4 11 Riser Board 4 12 DIMMs 4 13 Microprocessor Heat Sink Assembly 4 14 System Battery 4 16 System Board 4 17 Appendix A System Setup Program A 1 System Setup Screens A 2 Index Figures Figur...

Страница 5: ... Removal 4 8 Figure 4 7 System Board Components 4 9 Figure 4 8 Expansion Card Cage Removal 4 10 Figure 4 9 Expansion Card Removal 4 11 Figure 4 10 Riser Board Removal 4 12 Figure 4 11 DIMM Removal 4 13 Figure 4 12 DIMM Installation 4 13 Figure 4 13 Microprocessor Removal 4 14 Figure 4 14 Microprocessor Securing Clip Removal 4 15 Figure 4 15 System Battery Removal 4 16 Figure 4 16 System Board Remo...

Страница 6: ...le 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 pro cedures and instructions on using the Dell diagnostics to test the computer system WARNING A WARNING indicates the potential for bodily harm and pro...

Страница 7: ...aded when faster microprocessors become available The Pentium microprocessor contains a built in clock multiplier circuit which increases the internal operating frequency to a multiple of the system clock fre quency The microprocessors for Dell OptiPlex N computers operate at a frequency of 166 MHz 200 MHz or 233 MHz derived from a system clock frequency of 66 MHz These Dell computers incorporate ...

Страница 8: ...speed EDO DIMMs Built in SVGA controller attached to the PCI bus with 2 MB of video memory Optional integrated 10 100 Mbps Ethernet NIC Optional NIC expansion card providing Wakeup On LAN capability Integrated Universal Serial Bus USB controller with two USB compliant connectors SMART compliant hard disk drive and SMART support in the system BIOS which provides notification at system start up if t...

Страница 9: ...drive access indicator power button power indicator serial port 1 connector power supply AC power receptacle expansion card cage USB connectors 2 keyboard connector video connector expansion card slot hard disk drive NIC connector optional EIDE cable parallel port connector mouse connector serial port 2 connector padlock ring security cable slot security access lock DC power cable ...

Страница 10: ...subsystem provides two mode 4 DMA bus mastered EIDE inter faces each of which can support up to two EIDE devices The EIDE controller attaches to the high speed PCI local bus Any attached EIDE device should be configured for the Cable Select jumper position The computer s boot drive should be connected to the primary EIDE interface IDE1 NOTE Although the OptiPlex N system board supports up to four ...

Страница 11: ...J45 connector and NIC interface circuitry are mounted on the system board The connector includes the following indicators see Figure 1 5 A yellow activity indicator flashes when the computer 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 b...

Страница 12: ...ces DC voltages only under its loaded condi tion Therefore when you measure these voltages the DC power connectors must be connected to their corresponding power input connectors on the system board and hard disk drive Table 1 1 DC Voltage Ranges Voltage Range Maximum Output Current1 3 3 VDC 3 135 to 3 465 VDC 6 0 A1 5 VDC 4 75 to 5 25 VDC 12 0 A1 12 VDC 11 40 to 12 60 VDC 1 0 A2 12 VDC 10 80 to 1...

Страница 13: ...ol the power supply fan speed 3 Pin 5 PWRGOOD should measure between 4 and 5 VDC when the power supply is on to indicate that all power supply output voltages are within the ranges specified in Table 1 1 Figure 1 6 DC Power Connector P1 Figure 1 7 DC Power Connector P2 11 1 PWRGOOD 3 orange 12 VDC blue 12 VDC yellow 5 VFP purple common black 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 P1 5 VDC r...

Страница 14: ... 1 10 provide the following information about DC power distribution Power supply connector identification Power cable connection for the hard disk drive Power distribution to sockets and connectors on the system board Figure 1 9 DC Power Cables 1 2 3 4 5 VDC red common black common black 12 VDC yellow P3 P3 P2 P1 ...

Страница 15: ...VDC 12 VDC 3 VDC P2 3 3 VDC PWRGOOD P1 POWER_1 PSON 5 VFP 5 VDC 12 VDC 12 VDC PSON 5 VFP 5 VDC 12 VDC 12 VDC P3 12 VDC 12 VDC 12 VDC computer power supply keyboard controller battery 3 3 VDC 5 VDC PCI1 MICROPROCESSOR PANEL KYBD MOUSE DIMM_A DIMM_B main memory sockets FAN RISER riser board system board POWER_2 processor core regulator 5 VDC USB internal hard disk drive ...

Страница 16: ...e connector DSKT pin 1 corner riser board connector RISER serial port 2 connector SERIAL2 system board jumpers NIC connector ENET control panel connector PANEL 3 3 V power input connector POWER_2 keyboard mouse connectors stacked KYBD MOUSE main power input connector POWER_1 microprocessor socket MICROPROCESSOR pin 1 corner DIMM sockets 2 DIMM_A USB connectors 2 USB front of computer parallel seri...

Страница 17: ...recommended 72 bit parity DIMMs can also be installed The standard main memory is 16 MB of high speed 60 ns nonparity memory For optimum performance install DIMMs in consecutive sockets starting with socket DIMM_A System Board Jumpers Figure 1 12 shows the location of the jumper blocks on the system board See Table 1 2 for the jumper descriptions and settings Figure 1 12 System Board Jumpers jumpe...

Страница 18: ...microprocessor s internal speed is 200 MHz otherwise the jumper should not be installed 233 Microprocessor speed Install jumper if the microprocessor s internal speed is 233 MHz otherwise the jumper should not be installed PSWD Password enable or disable Install to enable the password features Remove the PSWD jumper and boot the computer to remove an existing password BIOS Reserved Do not install ...

Страница 19: ...troller to indicate that device con nected to parallel port requires service IRQ8 Generated by keyboard controller for each tick of RTC IRQ9 Available for use by video controller to indicate that the video or monitor requires service IRQ10 Available for use by an expansion card IRQ11 Available for use by an expansion card IRQ12 Generated by keyboard controller to indicate that mouse s output buffe...

Страница 20: ...erated 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 NOTES The video controller and optional built in NIC controller are assigned available DMA channels automatically during computer start up If the parallel port is in ECP mode it uses...

Страница 21: ...k 66 MHz Internal cache 32 KB 16 KB data cache 16 KB instruc tion cache Math coprocessor internal to the microprocessor System Information System chip set Intel 430TX PCI chip set Data bus width 64 bits Address bus width 32 bits DMA channels seven Interrupt levels 15 Flash EPROM BIOS 2 Mb 256 KB Expansion Bus Bus type PCI complies with PCI specification 2 1 Bus speed 33 MHz PCIexpansion cardconnec...

Страница 22: ...gh EIDE hard disk drive Video Video type S3 Trio 64V2 86C785 built in SVGA controller attached to the PCI bus Video memory 2 MB Maximum video resolution 1280 x 1024 pixels with 256 colors noninterlaced 1024 x 768 pixels with 65 536 colors noninterlaced Ports Externally accessible Serial DTE two 9 pin connectors 16550 compatible Parallel one 25 hole connector bidirectional Video one 15 hole connect...

Страница 23: ...n LED Activity indicator onconnectorforoptionalNIC yellow LED Power Power supply wattage 80 W Power supply heat dissipation 400 BTU hr nominal without monitor Power supply voltage 90 to 135 V at 60 Hz 180 to 265 V at 50 Hz Backup battery 3 V CR2032 coin cell Physical Height 9 27 cm 3 65 inches Width 33 71 cm 13 27 inches Depth 34 93 cm 13 75 inches Weight 5 9 kg 13 lb 1 Although the system board p...

Страница 24: ...ing left side for operation in a vertical orienta tion and bottom half sine pulse with a change in velocity of 50 8 cm sec 20 inches sec Storage 27 G faired square wave with a velocity change of 508 cm sec 200 inches sec Altitude Operating 16 to 3048 m3 50 to 10 000 ft Storage 16 to 10 600 m 50 to 35 000 ft 3 The maximum operating temperature of 35 C 95 F is for altitudes below 914 6 m 3000 ft Abo...

Страница 25: ...problem or indicate the appropriate 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 com puter s condition permits See Maintaining the System in the online Network Administrator s Guide for information about backing up data 2 Ask the user to try to duplicate the problem by repeating the operati...

Страница 26: ...ched to the serial ports parallel port and USB connectors are properly connected Each of the serial parallel and USB 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 5...

Страница 27: ...per right corner 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 computer power supply If the troubleshooting pro cedure indicates that the computer power supply is operational troubleshoot the...

Страница 28: ...stem complete the load opera tion then shut down the system and try again 4 Press f immediately after you see a menu to enter the firmware update services If you wait too long 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 h...

Страница 29: ...erver based diagnostics see Server Based Diagnostics in the online Network Administrator s Guide Hard Disk Based Diagnostics The hard disk based diagnostics contains tests that aid in troubleshooting all major components of the computer If it is not possible to run the server based diagnostics or if the server based diagnostics fails to reveal the source of a sus pected hardware problem run the ha...

Страница 30: ...puter 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 con...

Страница 31: ...ors To ensure that the chips are fully seated in their sockets press firmly on the top of each chip To reseat the microprocessor remove it from its socket and reinstall it as described in Microprocessor Heat Sink Assembly in Chapter 4 To reseat a DIMM remove it from its socket and reinstall it as described in DIMMs in Chapter 4 If you need to reseat an expansion card remove it from its connector a...

Страница 32: ... diagnostics contains the same tests as the hard disk based diagnostics These tests aid in troubleshooting all major components of the computer If it is not possible to run the hard disk based diagnostics the diskette based diagnostics may be run using an available external diskette drive kit Connecting the External Diskette Drive Figure 2 1 External Diskette Drive CAUTION To prevent damage to the...

Страница 33: ...d 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 ...

Страница 34: ... or the tests in the server based hard disk based or diskette based diagnostics reveals the source of the problem or leads to the proper troubleshooting steps for determining the source of the problem call Dell for technical assistance For instructions see Contacting Dell in the online Network Administrator s Guide ...

Страница 35: ...e Server Based Diagnostics Hard Disk Based Diagnostics and Diskette Based Diagnostics in Chapter 2 POST Beep Codes If the monitor cannot display error messages during the POST the computer may emit a series of beeps that identifies the problem or that can help you iden tify a faulty component or assembly Table 3 1 lists the beep codes that may be generated during the POST Most beep codes indicate ...

Страница 36: ...fresh verifi cation failure Faulty or improperly seated DIMM or defective system board 1 3 2 No memory installed No memory installed or faulty or improperly seated DIMM 1 3 3 1 3 4 1 4 1 1 4 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 ...

Страница 37: ...errupt in protected mode Defective system board 4 3 1 Memory failure above address 0FFFFh Faulty or improperly seated DIMM 4 3 3 Timer chip counter 2 failure Defective system board 4 3 4 Time of day clock stopped Bad battery or defective system board 4 4 1 4 4 2 Serial port test failure Parallel port test failure Faulty I O chip defective system board 4 4 3 Math coprocessor failure Faulty micropro...

Страница 38: ... cannot usually be rebooted until an appropriate hardware change has been made The following messages indicate a fatal error Bad error correction code ECC on disk read Controller has failed Data error Gate A20 failure Hard disk controller failure Hard disk drive read failure Hard disk failure Keyboard clock line failure Keyboard controller failure Keyboard data line failure Keyboard stuck key fail...

Страница 39: ... associated controller defective Faulty diskette tape drive subsystem or hard disk drive subsystem defec tive system board 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 computer from using available memory One or more DIMMs faulty or i...

Страница 40: ...ilure Hard disk drive read failure Hard disk failure Hard disk drive failed to initialize Incorrect configuration settings in System Setup program improperly con nected hard disk drive cable faulty hard disk drive controller sub system defective system board or loose power cable Invalid con figuration information please run SETUP program System Setup program contains incorrect system configuration...

Страница 41: ... address read value expect ing value Memory double word logic failure at address read value expect ing value Memory odd even logic failure at address read value expecting value Memory write read failure at address read value expect ing value During memory test value read at address was incorrect Faulty or improperly seated DIMMs or defec tive system board Memory alloca tion error Software in use c...

Страница 42: ...m 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 Computer encountered problem in trying to configure one or more expansion ...

Страница 43: ... drive Shutdown failure Computer board chip faulty Defective system board Time of day clock stopped Backup battery low Defective battery or faulty chip defective sys tem board Time of day not set Time or date setting in System Setup program incorrect or computer battery bad Incorrect Time or Date settings or defective com puter battery Timer chip counter 2 failed Timer circuit on system board malf...

Страница 44: ...ack up your data and replace your hard disk drive by calling your support desk or Dell Computer Corporation POST queried EIDE drive for status Drive detected possible error conditions Unreliable or defective drive Write fault Write fault on selected drive MS DOS cannot write to diskette or hard disk drive Faulty diskette or hard disk drive Table 3 2 System Error Messages continued Message Definiti...

Страница 45: ...n this chapter You have removed 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 fol lowing tools Small flat blade screwdriver Wide flat blade screwdriver 1 and 2 Phillips head screwdrivers 1 4 inch nut d...

Страница 46: ...owing steps in the sequence listed 1 Turn 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 Wear a wrist grounding strap and clip it to an unpainted metal sur face such as the padlock ring on the back o...

Страница 47: ...s or a wide flat blade screwdriver 3 Pull the stand away from the computer Disengage the locator pins that position and help secure the stand to the computer When reinstalling the stand align the front edge of the stand with the groove between the front bezel and the computer cover Move the stand until the loca tor pins engage the holes in the side of the computer The locator pins are keyed for co...

Страница 48: ...ne is installed from the padlock ring 2 Using a 2 Phillips head screwdriver rotate the service access lock 1 4 turn clockwise to the position shown in Figure 4 3 Figure 4 3 Service Access Lock 3 Press the two securing buttons until the cover is free to swing up see Figure 4 2 securing buttons 2 front of computer security cable slot service access lock padlock ring ...

Страница 49: ...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 the proper airflow inside the computer You may have to press gently downward on the back edge of the cover while engaging the locking mechanism ...

Страница 50: ...tem board see Figure 4 7 3 From inside the chassis remove the mounting screw securing the con trol 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 control panel cable under the retention tabs on the chassis wall control panel cable ...

Страница 51: ...and the EIDE cable from the back of the drive 2 Disconnect any external cables from the expansion card if one is installed 3 Remove the expansion card cage 4 Remove the expansion card if one is installed 5 Remove the four hard disk drive mounting screws that attach the hard disk drive to the expansion card cage hard disk drive mounting screws 4 hard disk drive expansion card cage ...

Страница 52: ...nd lift the connector away from the chassis 6 Push the power supply retention tab forward and 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 rete...

Страница 53: ...e interface connector DSKT pin 1 corner riser board connector RISER serial port 2 connector SERIAL2 system board jumpers connector for optional integrated NIC ENET control panel connector PANEL 3 3 V power input connector POWER_2 keyboard mouse connectors stacked KYBD MOUSE main power input connector POWER_1 microprocessor socket MICROPROCESSOR pin 1 corner DIMM sockets 2 DIMM_A USB connectors 2 U...

Страница 54: ...nal 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 chas sis to ensure t...

Страница 55: ...e steps see Figure 4 9 1 Remove the expansion card cage 2 Remove the retaining screw from the card mounting bracket 3 Grasp the expansion card by its corners and carefully remove it from the expansion card connector retaining screw card slot opening expansion card connector riser board expansion card card mounting bracket ...

Страница 56: ...the expansion card cage on a flat work surface with the riser board facing up 4 Remove the riser board mounting screw 5 Slide the riser board to the side as shown in Figure 4 10 and then remove the riser board from the expansion card cage When you replace the riser board be sure the two tabs on the expansion card cage engage the riser board slots riser board riser board mounting screw expansion ca...

Страница 57: ...t s securing clips see Figure 4 11 until the DIMM is released from its socket Lift the DIMM away from the socket Figure 4 12 DIMM Installation To replace a DIMM press the DIMM fully into the socket while closing the securing clips see Figure 4 12 to lock the DIMM into the socket securing clips 2 securing clips 2 ...

Страница 58: ... assembly see Figure 4 14 Press down on the folded part of the clip with a small screwdriver to release the clip WARNING The microprocessor chip can get extremely hot during system operations Be sure the chip has had sufficient time to cool before touching it heat sink microprocessor securing clip thermal interface pad attached to underside of heat sink microprocessor pin 1 corner of socket right ...

Страница 59: ...rocessor socket release lever is in its fully vertical position to allow the microprocessor pins to easily slip into the socket When the microprocessor heat sink assembly is in place rotate the microprocessor socket release lever to its horizontal position Hook the microprocessor securing clip over the socket tab nearest the right side of the system board and then snap it over the tab on the oppos...

Страница 60: ...t of its socket with your fingers or with a blunt nonconducting object such as a plastic screwdriver When you replace the system battery orient the new battery with the facing up Insert the battery into its socket and snap it into place WARNING There is a danger of the new battery exploding if it is in correctly installed Replace the battery only with the same or equivalent type recommended by the...

Страница 61: ...board out of the chassis be sure to lift evenly and not twist the system board If you are replacing a system board remove the microprocessor heat sink assembly and the DIMMs from the old system board and install them on the replacement board 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 i...

Страница 62: ...4 18 Dell OptiPlex N Systems Service Manual ...

Страница 63: ...or reboot the system 2 Press Ctrl Alt Enter immediately after you see the following message Press Ctrl Alt Enter for Setup 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 You can also enter the System Setup program by responding to certain error messages NOTE To ensure an orderly system shut...

Страница 64: ...ette Drive A Tab Shift Tab change fields Secondary Drive 0 None Drive 1 None Not Installed change values Esc exit 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 BIOS Version XXX This category sets whether keyboard related error messag...

Страница 65: ... for automatic If none of the supported drive types matches the parameters of the new drive enter parame ters directly To do so highlight the appropriate Drive category Drive 0 or Drive 1 and type u to display User1 Press Tab to highlight each of the parameter fields in succession and enter the appropriate number for each field Reserved Memory Designates a region of system board memory that can be...

Страница 66: ...is a risk of dam aging the monitor NOTE Not all EIDE hard disk drives support this feature Enabling this feature for drives that do not support it may cause the EIDE drive to become inoperable until the system is restarted and the Power Management category is disabled Wakeup On LAN Enables On Add in NIC or disables Off the Wakeup On LAN feature of the optional network expansion card NIC Enables On...

Страница 67: ... speaker Pentium Processor MMX Displays type of microprocessor installed Level 2 Cache Displays size of the integrated cache Video Memory Displays amount of video memory on the sys tem board System Memory Displays entire amount of installed memory detected in system except for memory on EMS expansion cards If EDO DIMMs are installed EDO is displayed next to this category Service Tag Displays syste...

Страница 68: ...ginal list Exclude from Boot Device Priority Ctrl Ins move to other list The DEVICE LIST contains devices that may be bootable The system attempts to boot from the devices in the list as ordered If you ESC or ALT B from this menu the displayed order becomes the boot selection Ctrl Ins moves items between Boot Device Priority and Exclude from Boot Device Priority only BIOS Version XXX 512 KB 2 MB 3...

Страница 69: ... 1 7 distribution 1 9 power supply connectors 1 8 voltage ranges 1 6 diagnostics diskette based 2 8 hard disk based 2 5 server based 2 4 DIMMs installation 4 13 installation guidelines 1 11 removal 4 13 types and sizes 1 11 DMA channel assignments 1 14 E EIDE subsystem 1 4 error messages list of 3 4 expansion card cage removal 4 10 expansion card removal 4 11 expansion card slot 1 4 external conne...

Страница 70: ... cables 1 8 power distribution 1 9 removal 4 8 voltage ranges 1 6 R riser board removal 4 12 S SIMMs See DIMMs specifications technical 1 15 stand for vertical orientation description 1 5 removal 4 3 subsystems EIDE 1 4 memory 1 11 system battery removal 4 16 system board component locations 1 10 jumpers 1 11 removal 4 17 system error messages list of 3 4 system features 1 2 system memory See memo...

Страница 71: ...Index 3 internal visual inspection 2 7 V video controller 1 4 visual inspection external 2 2 internal 2 7 ...

Страница 72: ...4 Dell OptiPlex N Systems Service Manual ...

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