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NEC DIRECTION SP B - SERVICE MANUAL 1998 Service Manual

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PROPRIETARY NOTICE AND LIABILITY DISCLAIMER
The information disclosed in this document, including all designs and related materials, is
the valuable property of NEC Computer Systems Division, Packard Bell NEC, Inc.
(hereinafter "NEC CSD") and/or its licensors. NEC CSD and/or its licensors, as appropri-
ate, reserve all patent, copyright and other proprietary rights to this document, including all
design, manufacturing, reproduction, use, and sales rights thereto, except to the extent said
rights are expressly granted to others.
The NEC CSD product(s) discussed in this document are warranted in accordance with the
terms of the Warranty Statement accompanying each product. However, actual
performance of each such product is dependent upon factors such as system configuration,
customer data, and operator control. Since implementation by customers of each product
may vary, the suitability of specific product configurations and applications must be
determined by the customer and is not warranted by NEC CSD.
To allow for design and specification improvements, the information in this document is
subject to change at any time, without notice. Reproduction of this document or portions
thereof without prior written approval of NEC CSD is prohibited.
As an ENERGY STAR partner, NEC Computer Systems Division (NEC CSD) has determined that this product meets the ENERGY STAR
guidelines for energy efficiency.
FaxFlash is a service mark NEC Computer Systems Division (NEC CSD), Packard Bell NEC, Inc.
Direction is a trademark of Packard Bell NEC, Inc.
NEC and MultiSync are registered trademarks of NEC Corporation, used under license.
ENERGY STAR is a U.S. registered trademark.
All other product, brand, or trade names used in this publication are the trademarks or registered trademarks of their respective trademark
owners.
First Printing — April 1998
Copyright 1998
NEC Computer Systems Division
Packard Bell NEC, Inc.
1414 Massachusetts Avenue
Boxborough, MA 01719-2298
All Rights Reserved

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Summary of Contents for NEC DIRECTION SP B - SERVICE MANUAL 1998

  • Page 1 Reproduction of this document or portions thereof without prior written approval of NEC CSD is prohibited. As an ENERGY STAR partner, NEC Computer Systems Division (NEC CSD) has determined that this product meets the ENERGY STAR guidelines for energy efficiency.

  • Page 2: Table Of Contents

    Contents Page Preface......................... Abbreviations....................... xiii Section 1 Technical Information System Board ......................1-1 Processor ......................1-1 System Cache/Memory ..................1-2 Chipset ......................... 1-2 PCI Local Bus ...................... 1-3 Expansion Bus ....................1-3 BIOS ........................1-3 Plug and Play Support..................1-4 CMOS Memory/Real-Time Clock Battery.............
  • Page 3 Contents Getting Help ......................2-4 Main Menu ........................2-4 Advanced Menu......................2-6 Peripheral Configuration Submenu ................ 2-6 IDE Configuration Submenu ................. 2-8 Floppy Options Submenu ..................2-10 DMI Event Logging Submenu................2-11 Video Configuration Submenu ................2-11 Resource Configuration Submenu ................. 2-12 Security Menu ......................
  • Page 4 Contents Device Cabling...................... 3-16 Cabling an IDE Device................... 3-16 Cabling an Accessible 5 1/4-Inch Device ............3-16 Storage Device Installation..................3-17 Removing the Front Panel ................3-17 Removing the CD-ROM/DVD Drive.............. 3-18 Installing a 3 1/2-Inch Device ................. 3-19 Installing a 5 1/4-Inch Device ................. 3-22 Replacing the Front Panel................
  • Page 5 Contents System Board Removal..................5-10 Illustrated Parts Breakdown ..................5-12 Appendix A System Specifications Appendix B Connector Pin Assignments Serial Interface Connectors ..................B-4 Parallel Interface Connector ..................B-5 Power Supply (Primary)....................B-6 Keyboard and Mouse Connectors................. B-6 Front Panel ........................B-7 Diskette Drive Interface Pin Assignments..............
  • Page 6 Contents Figure 3-10 Diskette Drive Signal Cable............... 3-14 Figure 3-11 IDE Signal Cable ..................3-15 Figure 3-12 Power Cable Connectors................3-15 Figure 3-13 Connecting IDE Device Cables ..............3-16 Figure 3-14 Connecting an Accessible 5 1/4-Inch Device ..........3-17 Figure 3-15 Releasing the Front Panel ................3-18 Figure 3-16 Locating the Device Cage Screw...............
  • Page 7 Table 1-4 DMA Assignments ..................1-5 Table 2-1 Setup Key Functions ..................2-4 Table 3-1 Sample Memory Configurations ..............3-9 Table 4-1 NEC CSD Service and Information Telephone Numbers ......4-1 Table 4-2 Problems and Solutions ................4-5 Table 4-3 Beep Code Descriptions ................4-11 Table 5-1 Disassembly Sequence..................
  • Page 8 Contents Table B-14 PCI Expansion Pin Assignments..............B-14 Table B-15 USB Connectors..................B-15 Table C-1 System Board Jumper Settings..............C-3...

  • Page 9: Preface

    This service and reference manual contains technical information necessary for servicing and repairing Direction SP B-Series systems. The manual includes system setup information, procedures for installing options, and troubleshooting. The manual is written for NEC CSD-trained customer engineers, system analysts, service center personnel, and dealers. The manual is organized as follows: Section 1 —...

  • Page 10: Abbreviations

    xiii Abbreviations ampere DMAC DMA controller alternating current disk operating system advanced technology DRAM dynamic RAM (IBM PC) error checking and correction Bulletin Board Service extended data output binary-coded decimal Enhanced Graphics Adapter BIOS Customized Utility EPROM erasable and programmable BIOS basic input/output system binary digit...
  • Page 11 Abbreviations integrated peripheral controller PLCC plastic leaded chip carrier inches per second phase lock loop interrupt request peak-to-peak kilo (1024) programmable peripheral interface kilo (1000) PROM programmable ROM kilobyte quad flat pack kilogram random-access memory kilohertz RAMDAC RAM digital-to-analog pound converter light-emitting diode row address strobe...
  • Page 12 Abbreviations VESA-compliant feature connector Video Graphics Array VRAM video RAM watt write...

  • Page 13: Technical Information

    Section 1 Technical Information ™ This section provides an overview of the NEC Direction SP B-Series computers. These ® ® ™ systems include the Intel Pentium II processor with MMX technology. Table 1-1 describes the available features of the different models. The subsections that follow provide more detailed information on the system features.

  • Page 14: System Cache/Memory

    Technical Information System Cache/Memory To utilize the processor’s power, the system features an optimized 64-bit memory interface and provides support for a second level cache to compliment the processor’s internal cache. High-performance features include: pipeline 32-bit addressing 64-bit data 512-KB of pipeline burst secondary cache; direct mapped write-back and write-through organization.

  • Page 15: Pci Local Bus

    Technical Information PCI Local Bus The 32-bit industry-standard PCI bus is a highly-integrated input/output (I/O) interface that offers the highest performance local bus available for the Pentium II processor. The PCI bus supports burst modes that send large chunks of data across the bus, allowing fast displays of high-resolution images.

  • Page 16: Plug And Play Support

    Technical Information Plug and Play Support The system comes with Plug and Play BIOS technology. Plug and Play eliminates complicated setup procedures for installing Plug and Play expansion boards. To add a Plug and Play expansion board, simply power off the system, install the board, and power on the system.

  • Page 17: Table 1-3 Interrupt Level Assignments

    Technical Information Table 1-3 Interrupt Level Assignments System Resource I/O channel check Reserved, internal timer Reserved, keyboard controller Reserved, cascade interrupt from slave PIC COM2* COM1* Sound/User available Diskette drive LPT1* Real-time clock PCI/User available User available Windows Sound System*/User available PS/2 mouse port (if present, else user available) Reserved, numeric processor Primary IDE (if present, else user available)

  • Page 18: Ide Ports

    Technical Information IDE Ports The system board provides two fast IDE ports: primary channel and secondary channels. Each port supports two devices for a total of four IDE devices. The system board allows the connection of an IDE CD-ROM drive for system configuration flexibility without the addition of a controller.

  • Page 19: Robotics Modem Board (Optional)

    Technical Information The CS4611 enables burst mode transfers of audio data between the system bus and the device’s internal DMA engine and stream processor. The chip provides optimized digital audio processing. The optional AWE64D PCI sound board replaces the integrated Crystal audio system. It provides FM synthesis and 64 simultaneous voices.

  • Page 20: Power Management

    Technical Information POWER MANAGEMENT The Advanced Power Management (APM) program, located on the 82371EB PCI ISA IDE Xcelerator (PIIX4E) chip, reduces system power consumption when there is no activity detected from the keyboard, mouse, diskette drive, CD-ROM/DVD drive, or hard disk drive after a predefined period of time.

  • Page 21: Setup Utility

    Section 2 Setup Utility This section describes the Setup utility program that allows the system configuration information to be viewed and changed. NOTE: The system ships from the factory with the correct system parameters for the configuration. Unless setting the time and date, setting security features, customizing the system, or adding optional hardware, Setup does not need to be run.

  • Page 22: How To Start Setup

    Setup Utility to customize the system with security features such as passwords. to set system parameters after replacing the CMOS battery. HOW TO START SETUP To start the Setup utility, follow these steps: Turn on or reboot the system. Press after POST begins, but before the system boots up.

  • Page 23: Menu Bar

    Setup Utility The menu bar the line under the Setup title line. The menu bar contains six top-level menus to set system parameters. A Main Menu summary window the area on the left side of the screen. This area provides a summary of Main Menu Setup parameters. Some Main Menu parameters can be set from this window or they can be set from submenus.

  • Page 24: Legend Bar

    Setup Utility Legend Bar Use the keys listed in the legend bar on the bottom of the Setup menu to make the selections or exit the current menu. Table 2-1 describes the legend keys and their alternates. Table 2-1 Setup Key Functions Function Provides help for the parameter field being displayed.
  • Page 25 Setup Utility BIOS Version This field displays your system’s BIOS version number. Processor Type This field displays your computer’s processor type. Processor Speed This field displays your processor’s speed. Cache RAM This field displays the size of your system’s L2 (external) cache. System Memory and Memory Banks 0 - 2 This field displays the total amount of memory installed on your system board and in which banks the memory is installed.

  • Page 26: Advanced Menu

    Setup Utility To return to the Main Menu, press . To move to the Advanced Menu, press the right arrow key. ADVANCED MENU This section describes the Advanced Menu parameters. Other menu parameters are available by selecting submenus. Use the arrow keys to move the cursor to a parameter and press Enter to select a submenu.
  • Page 27 Setup Utility NOTE: If you select the Enabled option, you can see additional options that allow you to specify the Base I/O address and IRQs for the port you are configuring. Parallel Port This option configures the system’s Parallel Port. Choose “Auto” (default), “Enabled,”...

  • Page 28: Ide Configuration Submenu

    Setup Utility IDE Configuration Submenu This submenu can be used to auto-configure or manually configure the IDE devices, usually hard drives or CD-ROM drives. Depending on the system you purchased, the available options may include “User,” “Auto” (default), “CD-ROM,” “ATAPI Removable,” or “None.”...
  • Page 29 Setup Utility Multi Sector Transfers This option determines the number of sectors per block for multiple sector transfers. Like the Cylinders/Heads/Sectors options discussed above, you cannot access this option if the configuration type is set to “Auto.” If necessary, check the specification for your disk drive to determine the best setting for optimum drive performance.

  • Page 30: Floppy Options Submenu

    2-10 Setup Utility Ultra DMA This option sets the Ultra DMA Mode for the hard drive. This option cannot be changed when “Auto” is selected. The options include: Mode 0 Mode 1 Mode 2 Disabled (default). To return to the Advanced Menu, press Floppy Options Submenu This submenu can be used to configure your system’s diskette drives.

  • Page 31: Dmi Event Logging Submenu

    Setup Utility 2-11 DMI Event Logging Submenu This submenu can be used to view and modify DMI Event Logs. To enter the submenu, highlight the DMI Event Logging field, then press Enter . The following options appear: Event Log Capacity/Event Log Validity These fields indicate whether space is available in the Event Log, and whether the contents of the log are valid.

  • Page 32: Resource Configuration Submenu

    2-12 Setup Utility Resource Configuration Submenu This option allows you to reserve specific resources for use by legacy ISA devices. To enter the submenu, highlight this field, then press Enter . The following options are displayed: Memory Reservation Submenu This option lets you configure memory blocks for use by legacy ISA devices. When selected, the submenu displays a lists of addresses from which specific addresses can be selected.

  • Page 33: Power Menu

    Setup Utility 2-13 Press the right arrow (cursor) key to move to the Power Menu. POWER MENU The Power Menu is used to enable or disable the system’s power management features. When the power management option is enabled, the following options appear in the Power Menu: Power Management This feature lets you enable or disable BIOS power management.

  • Page 34: Hard Drive Submenu

    2-14 Setup Utility Scan User Flash Area This option configures the BIOS to scan the flash memory for user binary files that are executed at boot time. The choices are “Enabled” and “Disabled” (default). After Power Failure This option specifies whether or not to restore power to the system if it is turned on and there is a power failure.

  • Page 35: Removable Devices Submenu

    Setup Utility 2-15 Removable Devices Submenu This submenu lists any available removable devices (if included). One common option is Legacy Floppy Drives. The operating system assigns drive letters to these devices in the order listed. You can change the sequence (and drive lettering) by highlighting this field and pressing Enter .
  • Page 36 2-16 Setup Utility NOTE: If your system’s CMOS fails, the BIOS will load custom default settings (if you’ve saved them) or factory default settings. Finally, press Enter again to confirm and exit the Setup program.

  • Page 37: Option Installation

    Section 3 Option Installation This section provides instructions for installing the following options: expansion boards memory upgrade video upgrade — see the documentation for your video board data storage devices external options. All options (except external options) require removal of the access cover. Procedures for removing the cover are included in this section.

  • Page 38: Precautions

    Option Installation PRECAUTIONS Take care when working inside the system and when handling computer components. Avoid electric shock or personal injury by observing the following warning. WARNING: Before removing the access cover, turn off the power and unplug the system power cable.

  • Page 39: Removing The Access Cover

    Option Installation REMOVING THE ACCESS COVER The following subsections describe how to remove the access cover from the desktop or minitower system. WARNING: Before removing the access cover, turn off the power and unplug the system power cable. Power is removed only when the power cable is unplugged.

  • Page 40: Replacing The Access Cover

    Option Installation Figure 3-1 Releasing the Cover Lift the access cover off the system. REPLACING THE ACCESS COVER To replace the access cover, use the following procedure. Gently set the access cover inside the edge of the case, taking care not to bend the metal tabs.

  • Page 41: Expansion Boards

    Option Installation NOTE: The cover fits tightly. If it does not slide all the way to the front panel, place one hand on the front of the unit while you slide the cover forward from the rear. Reconnect all external peripherals. Plug in power cables.

  • Page 42: Expansion Board Installation

    Option Installation Figure 3-3 Locating Expansion Slots Expansion Board Installation Install expansion boards in the system as follows. Remove the access cover. Follow any preinstallation instructions that come with the expansion board (such as setting switches or jumpers on the board). Remove the screw securing an expansion slot cover and remove the cover.

  • Page 43: Expansion Board Removal

    Option Installation Save the screw for installing the expansion board. Be sure to save the slot cover for future use. CAUTION: A slot cover can damage the system board or any option board if it falls into the system. Take care to keep the slot cover from falling when removing the screw.

  • Page 44: Memory Upgrade

    Option Installation Remove the screw that secures the board to the support bracket. Pull the board out of the connector. Gently rock the board from side-to-side to release it from its connector. Replace the access cover. MEMORY UPGRADE Your system comes factory-installed with 32 MB to 384 MB of main system memory, in one to three 168-pin sockets on the system board for Dual In-line Memory Modules (DIMMs).

  • Page 45: Dimm Removal

    Option Installation Table 3-1 Sample Memory Configurations Bank 0 Bank 1 Bank 2 Total RAM 1 M x 64 (8 MB) Empty (0 MB) Empty (0 MB) 8 MB (min. memory) Empty (0 MB) 4 M x 64 (32 MB) 8 M x 64 (64MB) 96 MB 16 M x 64 (128 MB)

  • Page 46: Dimm Installation

    3-10 Option Installation Carefully rock the DIMM to pull it from the socket. Figure 3-6 Removing a DIMM Store the DIMM in an antistatic bag (available at electronic supply stores) or a cardboard box. DIMM Installation Use the following procedure to install a DIMM. Remove the access cover.

  • Page 47: Video Upgrade

    Option Installation 3-11 To install a DIMM, align the module with an empty socket. Make sure that the notches on the DIMM line up with the keys in the sockets. Insert the DIMM into the socket. Close the plastic clips at both ends of the socket.

  • Page 48: Device Slots

    3-12 Option Installation Device Slots Your computer has seven storage device slots: a 3.5-inch accessible device slot (contains the standard 1.44-MB diskette drive) two internal 3.5-inch hard drive slots (one contains the hard drive) four accessible device slots two accessible 5.25-inch device slots (one contains the standard CD-ROM drive) two 3.5-inch device slots;...

  • Page 49: Device Cables

    Option Installation 3-13 An IDE device, such as an IDE hard disk or IDE CD-ROM drive, must be set correctly as the first (master) or second (slave) device on the IDE channel. The standard IDE hard disk is set as the master device on the primary IDE connector.
  • Page 50 3-14 Option Installation Diskette Drive Signal Cable A two-connector diskette drive signal cable comes attached to the system board and to the standard 1.44-MB diskette drive. If your system comes standard with an Iomega Ditto tape backup unit, the signal cable has three connectors. Depending on your system, installation of a tape backup unit may require the replacement of the existing diskette drive signal cable with a three-connector cable.

  • Page 51: System Power Cables

    Option Installation 3-15 Figure 3-11 IDE Signal Cable System Power Cables Power cables come from the power supply and are attached to the standard storage devices. System power cables vary in length and provide connector sizes to accommodate a variety of supported storage configurations.

  • Page 52: Device Cabling

    3-16 Option Installation Device Cabling All storage devices require a power and signal cable connection. Devices shipped with the system are already connected. Cable optional devices as follows. Cabling an IDE Device Connect the IDE signal cable connector to the connector on the IDE device. Take care to prevent bending drive connector pins.

  • Page 53: Storage Device Installation

    Option Installation 3-17 Figure 3-14 Connecting an Accessible 5 1/4-Inch Device Storage Device Installation The following subsections describe how to install 3 1/2-inch and 5 1/4-inch devices. The installation procedures include: removing the front panel removing the CD-ROM/DVD drive installing a 3 1/2-inch device installing a 5 1/4-inch device replacing the front panel.

  • Page 54: Removing The Cd-Rom/Dvd Drive

    3-18 Option Installation Figure 3-15 Releasing the Front Panel Pull the panel away from the chassis. Removing the CD-ROM/DVD Drive If you need to remove the CD-ROM/DVD drive, you need to remove the accessible device cage. Use the following procedure to remove the accessible device cage. Locate the screw on the front of the system between the 3.5-inch blank panel and diskette drive.

  • Page 55: Installing A 3 1/2-Inch Device

    Option Installation 3-19 Installing a 3 1/2-Inch Device Use the following procedure to install a 3 1/2-inch device. Follow the preinstallation instructions that came with the device, such as setting jumpers and switches. Remove the access cover. Remove and label any cables that interfere with installing the device. Remove the front panel (see the previous section).
  • Page 56 3-20 Option Installation Figure 3-18 Removing the Bracket Screws Slide the 3 1/2-inch hard disk bracket towards the back of the system unit until it is free of the molded plastic. Align the two screw holes on the hard disk with the two tabs on the bracket.
  • Page 57 Option Installation 3-21 Place the hard disk into the bracket and secure with the screw. Figure 3-20 Securing the Disk Slide the bracket into the molded plastic drive slot. Secure the bracket to the front panel with the two screws shown in figure 3-18. If you are installing the device in the standard 3 1/2-inch internal device slot, simply insert the drive into the opening until it is secured (see Figure 3-21).

  • Page 58: Installing A 5 1/4-Inch Device

    3-22 Option Installation If you are installing a device in an accessible slot, go to step 6. To install a 3 1/2-inch device in an accessible slot: Remove the plastic blank panel from the selected slot by pressing the panel tab inward and swinging the blank panel out (see Figure 3-22).
  • Page 59 Option Installation 3-23 NOTE: If your 5 1/4-inch device comes with drive rails, do not attach them. Remove any rails attached. See the documentation that comes with the device. Remove the access cover. Remove the device cage (see “Removing the CD-ROM/DVD Drive”). Remove and label any cables that interfere with installing the device.

  • Page 60: Replacing The Front Panel

    3-24 Option Installation NOTE: If you removed the accessible device cage, replace it. Secure the device cage with the screw. If you installed a hard drive in the 5 1/4-inch slot, replace the plastic panel. Replace the front panel. Replace the access cover. Replacing the Front Panel To replace the front panel, follow this procedure.

  • Page 61: Rs-232C Device Connection

    Option Installation 3-25 Turn off power to the system and printer. Connect the printer cable to the printer port on the rear of the system unit (see Figure 3-24). Secure the cable with the screws provided. Connect the other end to the printer. Turn on the printer and the computer.
  • Page 62 3-26 Option Installation Connect the other end to the serial device. Turn on the serial device and the computer. Figure 3-25 Locating Serial Ports...

  • Page 63: Maintenance And Troubleshooting

    Maintenance and Troubleshooting This section provides information on maintaining and troubleshooting the Direction SP B-Series computers. Table 4-1 provides the NEC CSD service telephone numbers. Also included in this section are the error beep code descriptions and a procedure for replacing the CMOS battery.

  • Page 64: Maintenance

    Maintenance and Troubleshooting MAINTENANCE This subsection contains general information for cleaning and checking the system, keyboard, and monitor. The system, keyboard, and monitor require cleaning and checking at least once a year, and more often if operating in a dusty environment. No other scheduled maintenance or lubrication is required.

  • Page 65: Keyboard Cleaning

    Maintenance and Troubleshooting Keyboard Cleaning As necessary, inspect and clean the inside of the keyboard as follows. Remove the eight screws holding the keyboard enclosure together. NOTE: The keyboard and cable together are considered a whole-unit, field-replaceable assembly. Therefore, disassembly of the keyboard is necessary only when cleaning the inside.
  • Page 66 Maintenance and Troubleshooting Turn the ball cover clockwise and remove the cover. Figure 4-1 Removing the Mouse Ball Cover Turn the mouse over and remove the ball. Clean the mouse as follows: Clean the mouse ball with tap water and a mild detergent, then dry it with a lint-free cloth.

  • Page 67: Troubleshooting

    Maintenance and Troubleshooting TROUBLESHOOTING This subsection provides information that helps isolate and repair system malfunctions at the field level. Step-by-step instructions for diagnosing and solving system hardware problems are provided. Technical support is available at 1-888-632-2678. If disassembly is required, see Section 5. Connector pin assignments are given in Appendix B.
  • Page 68 Maintenance and Troubleshooting Table 4-2 Problems and Solutions Problem Symptom Solution Operating system Intermittent beeping at power- 1. Check system configuration (see does not boot on. Computer beeps more than Section 2). once and is unable to complete bootup. 2. Check all jumper settings and verify that drives are enabled (see appendices and Section 2).
  • Page 69 Maintenance and Troubleshooting Table 4-2 Problems and Solutions Problem Symptom Solution Hard drive Hard drive lamp does not light 1. Check cable connections between malfunction but hard drive can be lamp and system board. accessed. Hard drive controller failure 1. Check that the IDE port and hard message displayed.
  • Page 70 Maintenance and Troubleshooting Table 4-2 Problems and Solutions Problem Symptom Solution Monitor Unable to synchronize display. 1. Adjust the monitor’s synchronization malfunction controls. 2. Check that the monitor’s resolution matches the video setting or the video driver used. 3. Check that the utility is not selecting a refresh rate/resolution that is not supported by the monitor.
  • Page 71 Maintenance and Troubleshooting Table 4-2 Problems and Solutions Problem Symptom Solution CD-ROM/DVD System power not on. 1. Turn system power on. drive malfunction Disc tray does not open. 1. System power not on. Turn system power on. 2. System power failed. Insert about an inch of a straightened paper clip into the emergency eject hole, until the tray opens.
  • Page 72 4-10 Maintenance and Troubleshooting Table 4-2 Problems and Solutions Problem Symptom Solution 4. Check the IDE cable. Replace as necessary. 5. Check the power supply. Replace as necessary. 6. Check the system board. Replace as necessary. Communication No or bad data when 1.

  • Page 73: Beep Codes

    Maintenance and Troubleshooting 4-11 Beep Codes During boot up, the computer performs a series of POST (Power On Self Test) routines. A beep code may appear when an error is detected. There are fatal and nonfatal errors. The fatal errors include BIOS, CMOS, DMA, RAM, video, and keyboard controller errors. The nonfatal errors include timer tick interrupt, shutdown test, unexpected interrupt in protected mode, gate A20, RAM test, interval timer channel 2 test, clock, serial and parallel port test, numeric processor, system board select, and extended CMOS RAM.

  • Page 74: Cmos Battery Replacement

    4-12 Maintenance and Troubleshooting CMOS Battery Replacement Remove the 3-volt lithium battery from the system board as follows. Turn off and unplug the system unit and any external options connected to the system. CAUTION: Removing the battery from the system board causes the computer to lose system configuration information.
  • Page 75 Maintenance and Troubleshooting 4-13 WARNING: The battery can explode if it is incorrectly replaced or improperly discarded. Use only the same battery or an equivalent type recommended by the manufacturer when replacing the battery. Lithium acts as a catalyst when exposed to water and causes spontaneous combustion on contact.

  • Page 76: Disassembly And Reassembly

    Section 5 Disassembly and Reassembly This section contains step-by-step disassembly procedures for the system unit. Reassembly is the reverse of disassembly. The procedures are supported by simplified disassembly illustrations to facilitate removal. A Phillips-head screwdriver is the only required tool. For complete disassembly of the system unit, follow the disassembly order listed intable 5-1.

  • Page 77: Disassembly

    Disassembly and Reassembly When disassembling the system unit, follow these general rules. Disconnect all peripherals. When handling boards or chips, touch the system unit frame to discharge static. Do not disassemble parts other than those specified in the procedure. Use a Phillips-head screw driver, unless otherwise specified. Label all removed connectors.

  • Page 78: Front Panel Removal

    Disassembly and Reassembly Figure 5-1 Removing a Board Front Panel Removal Remove the front panel from the system unit as follows. Locate the two plastic tabs at the front of the chassis. They are indicated by two arrows engraved on the chassis. Press down on the two tabs and press in a third tab at the end of the panel to release the panel (see Figure 5-2).

  • Page 79: Side Panel Removal

    Disassembly and Reassembly Side Panel Removal Remove the side panel from the system unit as follows. Remove the system access cover and front panel as previously described. Locate the two side panel securing tabs at the front of the system. Pull the tabs out and away from the system.

  • Page 80: 1/4-Inch Device Removal

    Disassembly and Reassembly Locate the two clips at the front of the system that secure the diskette drive. Figure 5-4 Locating the Two Diskette Drive Clips Squeeze the two clips and pull the diskette drive out of the front of the system. 5 1/4-Inch Device Removal Remove an optional 5 1/4-inch device from the system unit as follows.

  • Page 81: Optional 3 1/2-Inch Hard Disk Drive Removal

    Disassembly and Reassembly Remove the screws holding the device in the cage (see Figure 5-5). Figure 5-5 Removing the 5 1/4-Inch Device Screws Slide the device out from the front of the system unit. Optional 3 1/2-Inch Hard Disk Drive Removal Remove the optional 3 1/2-inch hard disk drive as follows.

  • Page 82: Standard 3 1/2-Inch Hard Disk Drive Removal

    Disassembly and Reassembly Slide the 3 1/2-inch hard disk bracket towards the back of the system unit until it is free of the molded plastic. Remove the screw on the side of the hard disk securing it to the bracket. Figure 5-7 Removing the Securing Screw Slowly pull the hard disk away from the bracket and lift the disk out of the two securing tabs on the opposite side of the bracket.

  • Page 83: Fan Assembly Removal

    Disassembly and Reassembly Figure 5-8 Removing the Drive Fan Assembly Removal Remove the fan assembly per the following steps. Remove the system access cover per Section 3. At the rear of the system unit, press in on the two locking tabs securing the assembly to the chassis.

  • Page 84: Power Supply Removal

    Disassembly and Reassembly Figure 5-9 Removing a DIMM When installing a DIMM module, align the notches on the module with the keys in the memory socket, insert the module, and press in the plastic locking clips. Power Supply Removal Remove the power supply as follows. Remove the system access cover as previously described.

  • Page 85: System Board Removal

    5-10 Disassembly and Reassembly Figure 5-10 Removing the Power Supply Screws Pull the power supply out of the system unit. System Board Removal Remove the system board per the following steps. Remove the system access cover, expansion boards, fan assembly, and power supply as previously described.
  • Page 86 Disassembly and Reassembly 5-11 Figure 5-11 Removing the System Board Screw Slide the system board towards the front of the unit until is is clear of the metal shielding and the alignment clips. Lift the board out of the system at an angle. If replacing the system board, remove any installed DIMMs from the board.

  • Page 87: Illustrated Parts Breakdown

    Disassembly and Reassembly ILLUSTRATED PARTS BREAKDOWN This section contains the illustrated parts breakdown (IPB) and NEC CSD part numbers for the Direction SP B-Series desktop and minitower computers. Table 5-2 lists the field-replaceable parts for the desktop and Figure 5-12 provides the illustrated parts breakdown.
  • Page 88 Disassembly and Reassembly 5-13 Table 5-2 Direction SP B-Series Desktop Field-Replaceable Parts List* Item Description Part Number Altec Lansing speakers, ACS410 160313 Altec Lansing speakers, ACS251 160315 Fan assembly 158-056683-000 Video board, V330 AGP 060214 56-Kbps modem board 090134 56-Kbps Winmodem 090304 3C509B network board 203-00003...
  • Page 89 Jazz drive cartridge (not shown in figure) 380-00102 SCSI cable, 3 connector (not shown in figure) 070833 Monitor, NEC 15”, C550 (not shown in figure) 011001 Monitor, NEC 17”, C700 (not shown in figure) 011002 Monitor, NEC 17”, A700 (not shown in figure) 010438 Monitor, NEC 19”, C900 (not shown in figure)
  • Page 90 Disassembly and Reassembly 5-15 Figure 5-12 Direction SP B-Series Desktop Illustrated Parts Breakdown* ____________ * This data was prepared June 1998. For an up-to-date listing of spare parts, please call FaxFlash 1-888-329-0088 (or 1-978-635-6090 outside the U.S.) and order document 42102083.

  • Page 91: Table 5-3 Direction Sp B-Series Minitower Field-Replaceable Parts List

    5-16 Disassembly and Reassembly Table 5-3 Direction SP B-Series Minitower Field-Replaceable Parts List* Item Description Part Number AC power cable 070135 Microphone 232-00011 Microsoft Mouse 230-00026 Keyboard, Egro 229-00012 Cable, audio internal, dual MPC 070808 Diskette drive signal cable 070114 IDE signal cable 233-00026 SCSI cable...
  • Page 92 Disassembly and Reassembly 5-17 Table 5-3 Direction SP B-Series Minitower Field-Replaceable Parts List* Item Description Part Number Left side cover (access cover) 158-056686-000 Top cover 158-056685-000 Right side cover 158-056687-000 Front panel 158-056679-000 Speaker 158-056684-000 4.3-GB hard drive, IDE UDMA 300856 6.4-GB hard drive, IDE UDMA 300857...
  • Page 93 Jazz drive cartridge (not shown in figure) 380-00102 SCSI cable, 3 connector (not shown in figure) 070833 Monitor, NEC 15”, C550 (not shown in figure) 011001 Monitor, NEC 17”, C700 (not shown in figure) 011002 Monitor, NEC 17”, A700 (not shown in figure) 010438 Monitor, NEC 19”, C900 (not shown in figure)
  • Page 94 Disassembly and Reassembly 5-19 Figure 5-13 Direction SP B-Series Minitower Illustrated Parts Breakdown* ____________ * This data was prepared June 1998. For an up-to-date listing of spare parts, please call FaxFlash 1-888-329-0088 (or 1-978-635-6090 outside the U.S.) and order document 42102083.

  • Page 95: Table 5-4 Direction Sp B-Series Memory Options

    5-20 Disassembly and Reassembly Table 5-4 lists Direction SP B-Series memory options. Table 5-4 Direction SP B-Series Memory Options Description Part Number 32-MB DIMM (non-parity) 081918 64-MB DIMM (non-parity) 081919 Table 5-5 lists the Direction SP B-Series documentation. Table 5-5 Direction SP B-Series Documentation* Description Part Number Direction SP B-Series User’s Guide...

  • Page 96: Appendix A System Specifications

    Appendix A System Specifications This section describes the system specifications. Processor Microprocessor 350-MHz or 400-MHz Pentium II MMX Clock Rate 350 MHz internally, 100 MHz externally 400 MHz internally, 100 MHz externally Processor Support 32-bit addressing 64-bit data Primary Cache 32 KB of internal write-back cache on processor Secondary Cache 512 KB of pipeline burst cache...
  • Page 97 System Specifications 1-Mbit by 64 or 1-Mbit by 72 (8-MB DIMM) 2-Mbit by 64 or 2-Mbit by 72 (16-MB DIMM) 4-Mbit by 64 or 4-Mbit by 72 (32-MB DIMM) 8-Mbit by 64 or 8-Mbit by 72 (64-MB DIMM) 16-Mbit by 64 or 16-Mbit by 72 (128-MB DIMM). Read-Only Memory (ROM) Flash ROM 2 Mbit...
  • Page 98 System Specifications Expansion Slots I/O Bus PCI/ISA Six expansion slots One 8-/16-bit ISA slot Three 32-bit PCI slots One shared ISA/PCI slot One AGP slot Keyboard and Mouse Keyboard Windows 95 enhanced, PS/2-compatible Function Keys 12 keys, capable of up to 48 functions Status Lamps numeric lock, capital lock, and scroll lock keys Numeric Keypad...
  • Page 99 System Specifications Two 3.5-inch device slots; the lower 3.5-inch slot is not accessible on the desktop model Graphics Video Memory 4 MB Support for High Color at 1024 by 768, 800 by 600, 640 by 480, and True Color at 800 by 600 and 640 by 480 Graphics Support (with 4 MB video memory) 1280 by 1024 pixels, 256 colors...
  • Page 100 System Specifications Minitower Width 7.8 in. (19.81) Depth 17.3 in. (43.94 cm) Keyboard Height 1.6 in. (4.1 cm) Width 19.0 in. (48.3 cm) Depth 8.4 in. (21.3 cm) Weight The following weights are averages. Weights depend upon the system configuration. System Unit 27.5 lb (12.46 kg) Keyboard...

  • Page 101: Appendix B Connector Pin Assignments

    Appendix B Connector Pin Assignments This appendix describes the system board connector pin assignments. Table B-1 lists the connectors and sockets on the system board. The table also cross- references the page numbers where the connectors and their pinouts are described. Table B-2 and Table B-3 list each connector by its function, number, and type.
  • Page 102 Connector Pin Assignments Figure B-1 System Board Connectors and Slots Figure B-2 System Board External Connectors...

  • Page 103: Table B-2 System Board Internal Connectors

    Connector Pin Assignments Table B-2 System Board Internal Connectors Description Connector Number CD-ROM Audio J2F1 Auxiliary Line-in Audio J2F2 Telephony J2F1 Fan 3 J3F2 Diskette Drive J8K1 PCI IDE J8G1, J7G1 Fan 1 J8M1 Fan 2 J4M1 Power Supply J7L1 Table B-3 System Board Connector Numbers and Types Function Number...

  • Page 104: Serial Interface Connectors

    Connector Pin Assignments SERIAL INTERFACE CONNECTORS Pin assignments for the serial interface port connector are listed in Table-B-4. Table-B-4 RS-232C Serial Port Connector Pin Assignments Signal Description Carrier detect Serial In# Receive data Serial Out# Transmit data DTR# Data terminal ready Ground Signal ground Data set ready...

  • Page 105: Parallel Interface Connector

    Connector Pin Assignments PARALLEL INTERFACE CONNECTOR Parallel interface specifications for this port conform to the IBM-PC interface. Pin assignments for the parallel interface connector are listed in Table B-5. Table B-5 Parallel Port Connector Pin Assignments Signal Signal Strobe# Auto feed# Data bit 0 Fault# Data bit 1...

  • Page 106: Power Supply (Primary

    Connector Pin Assignments POWER SUPPLY (PRIMARY) Voltages from the power supply are input to the system board through the primary power supply connector. Table B-6 shows the connector pin locations and pin assignments. Table B-6 Primary Power Supply Connector Pin Assignments Signal Signal +3.3 V...

  • Page 107: Front Panel

    Connector Pin Assignments FRONT PANEL The front panel connector provides cabling for the buttons and panel LEDs (power and hard disk). The connector pin assignments are given in Table B-8. Table B-8 Front Panel Connector Pin Assignments Signal Description SW_ON# Power On Ground SLEEP_REQ...

  • Page 108: Diskette Drive Interface Pin Assignments

    Connector Pin Assignments DISKETTE DRIVE INTERFACE PIN ASSIGNMENTS Table B-9 provides the pin assignments for the diskette drive interface connector. Table B-9 Diskette Drive Connector Pin Assignments Description Description Ground DENSEL Ground Reserved FDEDIN Ground FDINDX# (Index) Ground FDM00# (Motor enable A) Ground No connect Ground...

  • Page 109: Ide Interface Connectors

    Connector Pin Assignments IDE INTERFACE CONNECTORS All signal levels in the IDE interface are TTL compatible. A logic 1 is a signal whose voltage level is between 2.0 and 5.0 V. A logic 0 is a signal measuring between 0.00 V and 0.70 V.

  • Page 110: Dimm Sockets

    B-10 Connector Pin Assignments DIMM SOCKETS Table B-11 provides the DIMM type, configuration, and technology by DIMM size. Table B-11 DIMM Socket Pin Assignments Description Description Description Description 127 V DQ32 128 CKE0 DQ33 129 NC DQM2 DQ34 130 DQM6 DQM3 DQ35 131 DQM7...

  • Page 111: Agp Connector

    Connector Pin Assignments B-11 AGP CONNECTOR Table B-12 provides the pin assignments for the AGP slot. Table B-12 AGP Connector Pin Assignments Description Description Pin Description Description +12V No connect Vcc3.3 B34 Vcc3.3 No connect AD22 B35 AD21 Reserved AD20 B36 AD19 No connect No connect...

  • Page 112: Isa Expansion Bus Connector Pin Assignments

    B-12 Connector Pin Assignments ISA EXPANSION BUS CONNECTOR PIN ASSIGNMENTS The expansion slots signals, voltages, and grounds are supplied through the bus connectors. Table B-13 provides the pin assignments for the ISA expansion slots. Table B-13 ISA Expansion Slot Pin Assignments Direction Signal Direction...
  • Page 113 Connector Pin Assignments B-13 Table B-13 ISA Expansion Slot Pin Assignments Direction Signal Direction Signal Input/Output Output Input/Output Ground Ground Input/Output SBHE# Input MEMCS16# (M16#) Input/Output LA23 Input IOCS16# (IO16#) Input/Output LA22 Input IRQ10 Input/Output LA21 Input IRQ11 Input/Output LA20 Input IRQ12 Input/Output...

  • Page 114: Pci Expansion Bus Connector Pin Assignments

    B-14 Connector Pin Assignments PCI EXPANSION BUS CONNECTOR PIN ASSIGNMENTS The expansion slots signals, voltages, and grounds are supplied through the bus connectors. Table B-14 provides the pin assignments for the PCI expansion slots. Table B-14 PCI Expansion Pin Assignments Signal Signal Signal...

  • Page 115: Universal Serial Bus (Usb) Connectors

    Connector Pin Assignments B-15 UNIVERSAL SERIAL BUS (USB) CONNECTORS Table B-15 lists the pin assignments and signal names for the USB connectors. Table B-15 USB Connectors Signal Name Power USBP0# (USBP1#) USBP0 (USBP1) Ground...

  • Page 116: Appendix C System Resources

    Appendix C System Resources The following sections include information about: default system settings viewing system resources jumper settings on the system board. IRQ SETTINGS The following settings are the default IRQ settings: IRQ0 (timer) IRQ1 (keyboard) IRQ2 (cascade interrupt) IRQ3 (COM2) IRQ4 (COM1) IRQ5 (sound/user available) IRQ6 (diskette drive)

  • Page 117: Viewing System Resources

    System Resources VIEWING SYSTEM RESOURCES Some hardware option installations might require system resources such as interrupt request (IRQ) lines, direct memory access (DMA) channels, and input/output (I/O) addresses. See the following procedures to view system resources. Follow these steps to view system resources: From the Windows 95 desktop, click the “My Computer”...

  • Page 118: Clearing Your Password

    None Enables BIOS recovery precedures. BIOS attempts to recover the BIOS configuration. A recovery diskette is required (downloadable from the NEC CSD Web site). Clearing Your Password The following sections describe how to clear your password. Turn off the power and unplug the system and any peripherals.

  • Page 119: Recovering The Bios

    System Resources If you removed the jumper, the system attempts to recover the BIOS. A recovery diskette is needed. Power off, unplug the system and monitor, and remove the access cover. Remove the jumper block from pins 2-3 and replace it on pins 1-2. If you removed any expansion boards, replace them (see Section 3, “Expansion Board Installation”).
  • Page 120 System Resources If you removed any expansion boards, replace them (see Section 3, “Expansion Board Installation”). Replace the access cover. Reconnect the system power cables and peripheral devices. Power on the system. Run Setup (see Section 2).
  • Page 121 Index system board, 5-10 system unit, 5-2 BIOS recovery, C-4 Expansion board removal, 3-7 CD-ROM/DVD Drive, 1-7 Expansion board installation, 3-5 Checking hard disk drive parameters, 2-8 External options, 3-24 CMOS battery, 4-12 parallel printer, 3-24 replacement, 4-12 serial devices, 3-25 Configurations, 1-1 setup, 2-1 Connectors, B-1...
  • Page 122 CD-ROM/DVD Drive, 1-7 System unit disassembly, 5-2 3 1/2-inch hard disk drive, 5-6 5 1/4-inch device, 5-5 DIMM module, 5-8 NEC CSD telephone numbers, 4-1 expansion board, 5-2 front panel, 5-3 power supply, 5-9 Operation, 2-1 standard 3 1/2-inch hard disk, 5-7...
  • Page 123 (For United States Use Only) FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT WARNING: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
  • Page 124 Division or an NEC CSD Authorized Service Center. It is the responsibility of users requiring service to report the need for service to NEC Computer Systems Division or to an NEC CSD Authorized Service Center. Service can be obtained at:...
  • Page 125 Canadian Department of Communications Modem Connection Requirements NOTE: The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. The Department does not guarantee the equipment will operate to the user’s satisfaction. Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company.
  • Page 126 BATTERY DISPOSAL Do not place used batteries in your regular trash. The nickel-cadmium or nickel metal-hydride batteries must be collected, recycled, or disposed of in an environmentally-approved manner. The incineration, landfilling, or mixing of batteries with the municipal solid waste stream is prohibited by law in most areas.

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