Dell OptiPlex N Service Manual (.pdf)

Dell OptiPlex N Manual

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  • Dell OptiPlex N | Service Manual (.pdf) - Page 1
    'HOOŠ2SWL3OH[Š16\VWHPV 6(59,&(0$18$/ ®
  • Dell OptiPlex N | Service Manual (.pdf) - Page 2
    in this manual is subject to change without notice. © 1997-1998 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 OptiPlex are
  • Dell OptiPlex N | Service Manual (.pdf) - Page 3
    Contents Chapter 1 System Overview 1-1 System Features 1-2 Expansion-Card Slot 1-4 Hard-Disk Drive 1-4 Enhanced Dual-Interface EIDE Subsystem 1-4 Built-In Video Controller 1-4 Optional Built-In NIC 1-5 Stand for Vertical Orientation 1-5 Computer Service 1-6 Computer Power Supply 1-6 Pin
  • Dell OptiPlex N | Service Manual (.pdf) - Page 4
    Error Messages 3-1 POST Beep Codes 3-1 System Error Messages 3-4 Chapter 4 Removing and Replacing Parts 4-1 Recommended Tools 4-1 Precautionary 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
  • Dell OptiPlex N | Service Manual (.pdf) - Page 5
    Removal 4-3 Figure 4-2. Computer Cover Removal 4-4 Figure 4-3. Service Access Lock 4-4 Figure 4-4. Control Panel Removal 4-6 Figure 4-5. Hard-Disk Drive Removal 4-7 Figure 4-6. System Power-Supply Removal 4-8 Figure 4-7. System Board Components 4-9 Figure 4-8. Expansion-Card Cage Removal
  • Dell OptiPlex N | Service Manual (.pdf) - Page 6
    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
  • Dell OptiPlex N | Service Manual (.pdf) - Page 7
    233 MHz, derived from a system clock frequency of 66 MHz. These Dell computers incorporate the high-performance PCI expansion bus. This bus is built into the system board, which also integrates the microprocessor, memory controller, hard-disk drive controller, video controller, and other elements of
  • Dell OptiPlex N | Service Manual (.pdf) - Page 8
    features found in a traditional personal computer, the Dell OptiPlex N computers include the following new and/or advanced features: • One PCI expansion-card slot on a riser board • One EIDE hard-disk drive • Ultra DMA/33 EIDE interface for hard-disk drive transfer rates of up to 33 MB/sec • Support
  • Dell OptiPlex N | Service Manual (.pdf) - Page 9
    serial port 1 connector mouse connector keyboard connector USB connectors (2) serial port 2 connector video connector Figure 1-3. Internal View DC power cable EIDE cable hard-disk drive NIC connector (optional) expansion-card cage expansion-card slot AC power receptacle System Overview 1-3
  • Dell OptiPlex N | Service Manual (.pdf) - Page 10
    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 EIDE devices, no devices other than the internal hard-disk drive should be connected. Built-In Video Controller The video subsystem consists
  • Dell OptiPlex N | Service Manual (.pdf) - Page 11
    Optional Built-In NIC The Dell OptiPlex N computers offer an optional integrated 10/100-Mbps 3Com® PCI 3C905 Ethernet NIC subsystem. The NIC provides all the functions of a separate 3Com 3C905 network expansion card and supports the 100BASE-TX Ethernet standards. Category 5 wiring and connections
  • Dell OptiPlex N | Service Manual (.pdf) - Page 12
    0.5 A +5 VFP3 +4.75 to +5.25 VDC 1.2 A 1 The combined load on the +5-VDC and +3.3-VDC outputs should not exceed 65 W. 2 Withstands surges of up to 3.0 A to support disk start-up operations. 3 VFP (volts flea power) - sometimes called "standby power." 1-6 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 13
    -low state. 2 Pin 19 - Thermal fan-speed control (TFSC) is a power-supply input signal used to control 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
  • Dell OptiPlex N | Service Manual (.pdf) - Page 14
    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 P3 P2 P1 Figure 1-9. DC Power Cables 1-8 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 15
    / logic NVRAM battery computer power supply P1 PWRGOOD PSON# +5 VFP POWER_1 PSON# +5 VFP +5 VDC +12 VDC -12 VDC +5 VDC +12 VDC -12 VDC P2 POWER_2 +3.3 VDC +3.3 VDC +5 VDC +12 VDC -12 VDC RISER riser board +3.3 VDC +5 VDC +12 VDC -12 VDC PCI1 internal P3 hard-disk drive +12 VDC FAN
  • Dell OptiPlex N | Service Manual (.pdf) - Page 16
    (IDE2) (pin-1 corner) Figure 1-11. System Board Components DIMM sockets (2) (DIMM_A) main power input connector (POWER_1) 3.3-V power input connector (POWER_2) diskette/tape drive interface connector (DSKT) (pin-1 corner) control panel connector (PANEL) 1-10 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 17
    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. jumpered unjumpered Figure 1-12
  • Dell OptiPlex N | Service Manual (.pdf) - Page 18
    . Remove the PSWD jumper and boot the computer to remove an existing password. BIOS Reserved Do not install jumper. * One set of the speed jumper pins must have a jumper plug installed; otherwise, the computer will operate at an undetermined speed. 1-12 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 19
    EIDE port to indicate that device requires service. If the EIDE controller is not in use, this line is available for other use. * Although the OptiPlex N system board supports up to four EIDE devices, no devices other than the internal hard-disk drive should be connected. System Overview 1-13
  • Dell OptiPlex N | Service Manual (.pdf) - Page 20
    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 one of the available DREQ lines. 1-14 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 21
    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 PCI expansion-card connectors one NIC NIC optional integrated 3Com PCI 3C905 network controller, operating at 10 or 100 Mbps System Overview 1-15
  • Dell OptiPlex N | Service Manual (.pdf) - Page 22
    ) Parallel one 25-hole connector (bidirectional) Video one 15-hole connector PS/2-style keyboard . . . . 6-pin mini-DIN connector PS/2-compatible mouse 6-pin mini-DIN connector NIC (optional RJ45 connector USB two USB-compliant connectors 1-16 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 23
    Depth 34.93 cm (13.75 inches) Weight 5.9 kg (13 lb) 1 Although the system board provides support for four EIDE devices, the power supply supports only the internal hard-disk drive. 2 An external diskette drive kit is available for diagnostics and troubleshooting purposes only. System Overview 1-17
  • Dell OptiPlex N | Service Manual (.pdf) - Page 24
    ) 3 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. 1-18 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 25
    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 operations he or she was performing
  • Dell OptiPlex N | Service Manual (.pdf) - Page 26
    computer, including all controls and indicators, for any signs of physical damage. Does the inspection reveal any problems? Yes. Refer to the appropriate procedure in Chapter 4, "Removing and Replacing Parts." No. Proceed to the next section, "Observing the Boot Routine." 2-2 Dell OptiPlex N Systems
  • Dell OptiPlex N | Service Manual (.pdf) - Page 27
    to or from the drive. If this indicator fails to light up during the boot routine, troubleshoot the hard-disk drive subsystem. • Beep codes - A beep code is a series of beeps that indicates an error condition. If the computer emits a beep code, see Table 3-1. • System error messages - These messages
  • Dell OptiPlex N | Service Manual (.pdf) - Page 28
    the computer to boot from the network. Highlight the Boot Sequence field (see Figure A-1). Either press to restore the default settings, or press and the right-arrow key to display the Device List screen (see Figure A-2) and then move the LANDesk Service Agent above Hard drive C: on
  • Dell OptiPlex N | Service Manual (.pdf) - Page 29
    the keyboard and the key- board controller chip • Disk 0 Tests - Check the hard-disk drive controller and the storage capa- bility of the hard-disk drive For a complete description of the server-based diagnostics, see "Server-Based Diagnostics" in the online Network Administrator's Guide. Hard-Disk
  • Dell OptiPlex N | Service Manual (.pdf) - Page 30
    "Hard-Disk- Based Diagnostics" in the online Network Administrator's Guide. NOTE: Further troubleshooting requires access to the inside of the computer. If you do not want to open the computer, proceed to the last section in this chapter, "Getting Help." 2-6 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 31
    of a problem, such as a loose expansion card, cable connector, or mounting screw. When you perform the visual inspection, refer to "System Features" in Chapter 1 to locate components in the inspection procedure. To perform the internal visual inspection, follow these steps: 1. Turn off the computer
  • Dell OptiPlex N | Service Manual (.pdf) - Page 32
    when servicing a user's computer. Dell recommends that users make several copies of this diskette to ensure that one is always available. Connecting the External Diskette Drive hard-disk drive external diskette drive Y-cable P3 Figure 2-1. External Diskette Drive 2-8 Dell OptiPlex N Systems Service
  • Dell OptiPlex N | Service Manual (.pdf) - Page 33
    computer, including any attached peripherals, and dis- connect all the AC power cables from their power sources. 2. Disconnect the DC power cable from the back of the hard-disk drive. 3. Connect the interface cable to the back of the external diskette drive and to the DSKT connector on the system
  • Dell OptiPlex N | Service Manual (.pdf) - Page 34
    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. 2-10 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 35
    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 identify a faulty component or assembly. Table 3-1 lists
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    Table 3-1. POST Beep Codes Beep Code Error Probable Causes 1-2 Video controller failure Defective system board 1-3 Monitor not detected Disconnected or faulty monitor 1-1-3 NVRAM write/read failure Defective system board 1-1-4 BIOS checksum failure Faulty BIOS or defective system board
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    Table 3-1. POST Beep Codes (continued) Beep Code Error Probable Causes 3-2-4 Keyboard-controller test failure Faulty keyboard controller (defective system board) 3-3-4 3-4-1 Screen initialization failure Screen-retrace test failure Faulty video subsystem (defective system board) 3-4-2 4-2-1
  • Dell OptiPlex N | Service Manual (.pdf) - Page 38
    drive read failure • Hard disk failure • Keyboard clock line failure • Keyboard controller failure • Keyboard data line failure • Keyboard stuck key failure • No timer tick interrupt • Shutdown failure • Timer chip counter 2 failed • Unexpected interrupt in protected mode 3-4 Dell OptiPlex N Systems
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    diskette/tape drive subsystem or hard-disk drive subsystem (defective system board). Controller has failed Data error Decreasing available memory Diskette drive 0 seek failure Diskette drive 1 seek failure Diskette read failure Hard-disk drive or associated controller defective. Computer received
  • Dell OptiPlex N | Service Manual (.pdf) - Page 40
    connector loose or improperly connected, defective keyboard, or defective keyboard/mouse controller (defective system board). Keyboard controller failure Keyboard/mouse controller failed. Defective keyboard/ mouse controller (defective system board). 3-6 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 41
    Keyboard data line failure Keyboard failure Computer cannot communicate with keyboard. Keyboard stuck key failure Keyboard cable connector loose or improperly connected, defective keyboard, or defective keyboard/mouse controller (defective system Software in use conflicts with operating system,
  • Dell OptiPlex N | Service Manual (.pdf) - Page 42
    sector not found MS-DOS cannot read from diskette or harddisk drive. Computer could not find particular sector on disk, or requested sector defective. Faulty diskette, diskette/ tape drive subsystem, or hard-disk drive subsystem (defective system board). 3-8 Dell OptiPlex N Systems Service Manual
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    Sector not found MS-DOS unable to Defective sectors on dis- locate sector on diskette kette or hard-disk drive. or hard-disk drive. Seek error MS-DOS unable to locate specific track on diskette or hard-disk drive. Defective diskette or hard-disk drive. Seek operation failed Computer could
  • Dell OptiPlex N | Service Manual (.pdf) - Page 44
    System has detected that drive [0/1] on the [0/1] EIDE controller is operating outside of normal specifications. It is advisable to immediately back 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
  • Dell OptiPlex N | Service Manual (.pdf) - Page 45
    Dell OptiPlex N computer. Unless otherwise noted, each procedure assumes the following: • You have performed the steps in "Precautionary Measures" found later in this chapter. • You have removed the computer and #2 Phillips-head screwdrivers • 1/4-inch nut driver • Tweezers or long-nose pliers Also,
  • Dell OptiPlex N | Service Manual (.pdf) - Page 46
    , and clip it to an unpainted metal surface, such as the padlock ring on the back of the chassis. If a wrist grounding strap is not available, touch an unpainted metal surface on the back of the computer to discharge any static charge from your body. 4-2 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 47
    bezel Figure 4-1. Optional Stand Removal To remove the stand, if one is installed, follow these steps (see Figure 4-1): 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. 3. Pull the stand away from the
  • Dell OptiPlex N | Service Manual (.pdf) - Page 48
    the service access lock 1/4-turn clockwise to the position shown in Figure 4-3. security cable slot padlock ring service access lock Figure 4-3. Service Access Lock 3. Press the two securing buttons until the cover is free to swing up (see Figure 4-2). 4-4 Dell OptiPlex N Systems Service Manual
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    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 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
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    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. 4-6 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 51
    Hard-Disk Drive hard-disk drive expansion-card cage hard-disk drive mounting screws (4) Figure 4-5. Hard-Disk Drive Removal To remove the hard-disk drive, follow these steps (see Figure 4-5): 1. Disconnect the DC power cable and the EIDE cable from the back of the drive. 2. Disconnect any external
  • Dell OptiPlex N | Service Manual (.pdf) - Page 52
    Removal To remove the system power supply, follow these steps (see Figure 4-6): 1. Disconnect the AC power cable from the back of the computer. 2. Disconnect the DC power cables from the system board (see Figure 4-7) and the hard-disk drive. 3. Remove the expansion-card cage. 4. Remove the EIDE
  • Dell OptiPlex N | Service Manual (.pdf) - Page 53
    that follow the figure contain procedures for removing system board and riser board components. connector for optional integrated NIC (ENET) video connector (MONITOR) serial port 2 connector (SERIAL2) USB connectors (2) keyboard/mouse (USB) connectors (stacked) (KYBD/MOUSE) battery socket
  • Dell OptiPlex N | Service Manual (.pdf) - Page 54
    -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 corner of the expansioncard cage while rotating the securing lever forward. 4-10 Dell OptiPlex N Systems Service
  • Dell OptiPlex N | Service Manual (.pdf) - Page 55
    Card card-slot opening expansion-card connector riser board card-mounting bracket retaining screw Figure 4-9. Expansion-Card Removal expansion card To remove an expansion card, follow these steps (see Figure 4-9): 1. Remove the expansion-card cage. 2. Remove the retaining screw from the card
  • Dell OptiPlex N | Service Manual (.pdf) - Page 56
    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. 4-12 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 57
    DIMMs securing clips (2) Figure 4-11. DIMM Removal To remove a DIMM, push outward on the DIMM socket's securing clips (see Figure 4-11) until the DIMM is released from its socket. Lift the DIMM away from the socket. securing clips (2) Figure 4-12. DIMM Installation To replace a DIMM, press the DIMM
  • Dell OptiPlex N | Service Manual (.pdf) - Page 58
    of socket microprocessor front of computer Figure 4-13. Microprocessor Removal system operations. Be sure the chip has had sufficient time to cool before touching it. Press down on the folded part of the clip with a small screwdriver to release the clip. 4-14 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 59
    clip (hooks over tabs on the socket) front of computer microprocessor socket Figure 4-14. Microprocessor Securing-Clip Removal 2. 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 opposite side of the socket
  • Dell OptiPlex N | Service Manual (.pdf) - Page 60
    's instructions. 1. If possible, enter the System Setup program and print the System Setup screens. 2. Remove the expansion-card cage system battery, orient the new battery with the "+" facing up. Insert the battery into its socket and snap it into place. 4-16 Dell OptiPlex N Systems Service Manual
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    as a handle when removing or installing the board. 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 (see Figure
  • Dell OptiPlex N | Service Manual (.pdf) - Page 62
    4-18 Dell OptiPlex N Systems Service Manual
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    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
  • Dell OptiPlex N | Service Manual (.pdf) - Page 64
    a sample of the Device List screen. Page 1 of 2 Dell Computer Corporation (www.dell.com) System OptiPlex N 5233 Setup BIOS Version: XXX Time: 13:17:02 Date: Tue August 26, 1997 Diskette Drive A: Not Installed Diskette Drive B: Not Installed Drives: Primary Type Cyls Hds Drive 0: Auto 1023 64
  • Dell OptiPlex N | Service Manual (.pdf) - Page 65
    EIDE connector supports two EIDE drives (Drive 0 and Drive 1). NOTE: Although the OptiPlex N system board supports up to four EIDE devices, no devices other than the internal hard-disk drive should be connected. For EIDE hard-disk drives, the system provides an automatic drive-type detect feature
  • Dell OptiPlex N | Service Manual (.pdf) - Page 66
    security by letting you set the system password to Locked or Unlocked. Boot Sequence Determines whether system boots from Diskette First, Hard Disk Only, LSA, or Device List (default; see Figure A-2). Setup Password Restricts access to System Setup program. Auto Power On Allows you to set the
  • Dell OptiPlex N | Service Manual (.pdf) - Page 67
    (bidirectional) port. The system also supports ECP mode. IDE Hard Disk Enables system's built-in EIDE hard-disk drive interface. Diskette Enables system's built-in diskette drive controller. Speaker Enables built-in speaker. Pentium Processor/MMX Displays type of microprocessor installed
  • Dell OptiPlex N | Service Manual (.pdf) - Page 68
    Computer Corporation (www.dell.com) System OptiPlex N 5233 Setup BIOS Version: XXX Boot Device Priority: LANDesk Service Agent for 3C90X Hard drive C: Exclude from Boot Device Priority: Device Controller Priority: System BIOS boot devices The DEVICE LIST contains devices that may be bootable
  • Dell OptiPlex N | Service Manual (.pdf) - Page 69
    , 4-16 beep codes, 3-1 boot routine, observing when trouble- shooting, 2-3 C computer cover removal, 4-4 orientation, 1-2 technical specifications, 1-15 connectors external, 1-3 internal, 1-10 control panel removal, 4-6 controllers NIC, 1-5 video, 1-4 cover removal, 4-4 D DC power connector pin
  • Dell OptiPlex N | Service Manual (.pdf) - Page 70
    -card connector, 1-4 POST beep codes description, 3-1 list of, 3-2 power supply about, 1-6 cables, 1-8 T technical specifications, 1-15 tools, recommended, 4-1 troubleshooting boot routine, 2-3 external visual inspection, 2-2 initial procedures, 2-1 2 Dell OptiPlex N Systems Service Manual
  • Dell OptiPlex N | Service Manual (.pdf) - Page 71
    internal visual inspection, 2-7 V video controller, 1-4 visual inspection external, 2-2 internal, 2-7 Index 3
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