Page 1 The information disclosed in this document, including all designs and related materials, is the valuable property of NEC Corporation (NEC) and/or its licensors. NEC and/or its li- censors, as appropriate, 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.
Page 2: Table Of Contents
Contents Preface..........................xiii Abbreviations ........................xv Section 1 Technical Information Desktop System Unit....................... 1-1 Minitower System Unit ....................1-2 System Board ........................1-3 Processor ......................... 1-5 Secondary Cache...................... 1-6 Flash ROM....................... 1-6 Power Management....................1-7 I/O Addressing ......................1-8 System Memory ....................... 1-9 Interrupt Controller ....................
Page 3 Contents Keyboard ......................... 1-20 Mouse..........................1-20 Integrated Technologies ....................1-20 Desktop Management Interface ................1-20 Plug and Play Support....................1-20 Power Saving Features..................... 1-20 Security Features...................... 1-21 Section 2 Setup and Operation Unpacking and Repacking ....................2-1 Setup..........................2-2 Desktop Setup ......................2-2 Minitower Setup.......................
Page 4 Contents Save Changes & Exit ..................2-25 Discard Changes & Exit .................. 2-25 Get Default Values................... 2-26 Load Previous Values ..................2-26 Save Changes....................2-26 BIOS Update Utility......................2-27 System Board Jumpers ....................2-28 Changing Jumper Settings ..................2-31 Clearing the Password....................2-32 Section 3 Options Desktop Cover Removal ....................
Page 5 Contents Section 4 Maintenance and Troubleshooting Maintenance ........................4-2 System Unit......................4-2 Keyboard........................4-3 Mouse........................4-4 Routine Checks ......................4-4 Troubleshooting ......................4-5 Error Messages......................4-5 How to Load Remote Support Session ............Diagnosing and Solving Problems................4-7 DOS Application Problems..................4-11 Windows Application Problems ................
Page 6 Contents Power Button Cover Removal ................. 6-8 Speaker Assembly Removal ..................6-9 SIMM Removal ....................... 6-10 3 1/2-inch Diskette Drive Removal ................. 6-11 3 1/2-inch Hard Disk Drive Removal ..............6-13 5 1/4-Inch Device Removal ..................6-15 5 1/4-Inch Device Cage Removal ................6-16 Power Supply Removal....................
Page 7 viii Contents List of Figures Desktop System Controls and Lamps ............... 1-1 Desktop Storage Devices and Controls ............1-2 Minitower System Controls and Lamps ............1-2 Minitower Storage Devices and Controls............1-3 Desktop Voltage Selector Switch ..............2-2 Peripherals Connections ................... 2-3 Lamps, Reset Button, and Power Button............
Page 8 Contents 3-17 Installing the Cache Module ................3-16 3-18 Locating Video DRAM Sockets in the Desktop..........3-17 3-19 Locating Video DRAM Sockets in the Minitower ........... 3-18 3-20 Aligning the Video DRAM Module ..............3-19 3-21 Locating the PGA/OverDrive Socket in the Desktop ........3-20 3-22 Locating the PGA/OverDrive Socket in the Minitower ........
Page 9 Contents Inside Expansion Slot Screw ................5-4 Removing the Expansion Slot L-Bracket ............5-5 PCI/ISA-Bus Backboard Screws ..............5-6 Indicator Panel Screws..................5-7 Power Button Tabs ................... 5-8 Speaker Screw....................5-9 5-10 SIMM Socket....................5-10 5-11 3 1/2-Inch Drive Bracket Screws..............5-11 5-12 3 1/2-Inch Diskette and Hard Disk Drive Screws..........
Page 10 System Security Options................... 2-23 2-10 Power Management Parameters................ 2-24 Memory Configurations..................3-10 NEC Service and Information Telephone Numbers ......... 4-1 BIOS Update Utility Error Messages..............4-5 Problems and Solutions ..................4-7 Sound Board DOS Problems ................4-11 Sound Board Windows Problems..............4-14...
Page 11 Contents Diagnostic Output and Beep Codes Looped on POST ........4-18 Desktop Disassembly Sequence ............... 5-1 System Board Connectors................. 5-17 PowerMate V486 Desktop Field-Replaceable Parts List........5-18 PowerMate V486 Desktop Options ..............5-21 PowerMate V486 Desktop Documentation and Packaging......5-21 PowerMate V466 Minitower Disassembly Sequence........
Page 12 Contents xiii...
Page 13: Preface
Section 4, Maintenance and Troubleshooting, includes a list of NEC service information and telephone numbers that provide access to the NEC Bulletin Board System (BBS), FastFacts™, and Technical Information Bulletins. This section also includes recommended maintenance information and a list of possible solutions for computer problems.
Page 14: Section 1 Technical Information
Section 1 Technical Information This manual contains information for desktop and minitower PowerMate V486 Series systems. The information applies to all models except where indicated. Models differ pri- marily in the chassis, CD-ROM reader, and microprocessor. This section provides an overview of the system hardware. The basic hardware for the sys- tem includes a system unit, mouse, and keyboard.
Page 15: Minitower System Unit
Technical Information Figure Section 1-2 Desktop Storage Devices and Controls MINITOWER SYSTEM UNIT The minitower chassis provides an enclosure for the system board, power supply, five stor- age device slots, and five expansion slots (four ISA and one ISA/PCI Bus™). A sound board is installed in one of the expansion slots in multimedia models.
Page 16: System Board
Technical Information Figure Section 1-4 Minitower Storage Devices and Controls SYSTEM BOARD The system boards are similar, differing only in the processor. The system board contains a Flash ROM which is upgradeable through the BIOS Update utility (see Section 2). See Section 2, Setup and Operation, for a description of the system board's jumpers.
Page 17 Technical Information memory – 32-bit (system also supports 36-bit), 70-nano second (ns) single-inline memory modules (SIMMs) 8 megabytes (MB) of random access memory (RAM) in the desktop and minitower systems (expandable to 64 MB) 16 MB in the desktop multimedia systems (expandable to 64 MB) cache 8 KB in the Intel486DX2 16 KB in the Intel486DX4...
Page 18: Processor
Technical Information expansion slots desktop systems (four slots) – three 8-/16-bit ISA slots (two available), one shared 32-bit PCI and 8-/16-bit ISA slot minitower systems (five slots) – four 8-/16-bit ISA slots (two available),one shared 32-bit PCI and 8-/16-bit ISA slot energy saving features –...
Page 19: Secondary Cache
Technical Information The processor is installed in a 237-pin, zero-insertion-force (ZIF) processor socket. This socket allows the installation of Intel OverDrive processors based on the Pentium core (PGA type package). When upgrading processors, they must operate with and external clock of 25 or 33 MHz. The 486DX2 is exactly like previous 486DXs except that it runs twice as fast internally.
Page 20: Power Management
Technical Information The BIOS programs execute the Power-On Self-Test, initialize processor controllers, and interact with the display, diskette drives, hard disks, communication devices, and peripher- als. The system BIOS also contains the Setup program and provides VGA controller sup- port. The hardware setup default copies the ROM BIOS into RAM (shadowing) for maximum performance.
Page 21: I/O Addressing
Real-time clock, CMOS memory, NMI mask Manufacturer's diagnostic checkpoint 081-09F DMA page register 0A0-0AF NMI (non-maskable interrupt) mask PS/2 alternate Fast A20 Gate, Hot Reset Extended system port (NEC-specific hardware setup) Extended system port (NEC-specific hardware setup) Extended system port (NEC-specific hardware setup)
Page 22: System Memory
Technical Information Table Section 1-5 I/O Address Map Address (Hex) I/O Device Name 0A0-0BF Interrupt controller 2 0C0-0DF DMA controller 2 (channel 4-7) 0E0-0EF Reserved 170-177 2nd hard disk 1F0-1F7 1st hard disk 1F9-1FF Reserved 200-207 Game I/O adapter (not available) 220-233 Sound board 278-27F...
Page 23: Interrupt Controller
1-10 Technical Information SIMMs install directly on the system board. Different size SIMMs may be intermixed. Each SIMM is inserted into a socket or bank. The system board's two SIMM sockets are assigned as banks 0 and 2. The standard 8 MB of memory is installed in bank 0. The PowerMate V4100 multimedia system has one 16 MB SIMM installed in bank 0.
Page 24: Video Controller
Technical Information 1-11 Video Controller The Trident 9440 video controller combines powerful elements aimed at addressing the re- quirements of personal computer designs. State of the art techniques have been added for optimizing performance in computer graphic intensive applications and graphical user in- terfaces (GUI).
Page 25 1-12 Technical Information Table Section 1-9 and Table Section 1-11 provide the different display modes for the video controller. Table Section 1-9 Text Modes Video Horiz Mode Column/ Clock Sync Vert Sync (Hex) Colors Rows Buffer Resolution (MHz) (kHz) (Hz) 16 (grey) 40 x 25 B8000...
Page 26 Technical Information 1-13 Table Section 1-11 Graphic Modes Video Horiz Vert Mode Column Clock Sync Sync (Hex) Colors /Rows Buffer Resolution (MHz) (kHz) (Hz) 40 x 25 B8000 320 x 200 25.2 31.5 40 x 25 B8000 320 x 200 25.2 31.5 80 x 25...
Page 27: Dual Ide Ports
1-14 Technical Information Table Section 1-11 Graphic Modes Video Horiz Vert Mode Column Clock Sync Sync (Hex) Colors /Rows Buffer Resolution (MHz) (kHz) (Hz) 100 x 37 A0000 800 x 600 72.0 56.6 128 x 48 A0000 1024 x 768 80.0 48.1 8x8 character size...
Page 28: Pci Bus
Technical Information 1-15 PCI Bus The industry-standard PCI bus is a highly-integrated input/output (I/O) interface that offers the highest performance local bus available for the 486-based processor. The PCI bus sup- ports burst modes that send large chunks of data across the bus, allowing fast displays of high-resolution images.
Page 29: Serial Interface
1-16 Technical Information SERIAL INTERFACE The system has two standard serial ports (COM1 and COM2). The serial ports support the standard RS-232C interface (16550 compatible). I/O addresses and interrupt levels for the two channels are given in Table Section 1-15. The interrupt is selectable via Setup to either IRQ3 or IRQ4.
Page 30: Power Button
Technical Information 1-17 Power Button The power button controls power to the system unit. Press the button once to turn on the power and again to turn off the power. Suspend Button The suspend button initiates a power-saving mode of operation. When pressed during nor- mal operation, the system goes into a Suspend or “Sleep”...
Page 31: Hard Disk Drive
1-18 Technical Information Specifications for the diskette drives are provided in Appendix B, Specifications. HARD DISK DRIVE The system provides IDE interface connectors on the system board. The system board sup- ports up to two IDE devices on the standard connector and two IDE devices on the fast VL bus IDE connector.
Page 32: Speakers
Technical Information 1-19 The advanced frequency modulation (FM) stereo synthesizers use a 16-bit digital-to- analog-converter (DAC) with four operator FM sounds and twenty stereo voices. The sound board provides digital sampling up to 44 kHz and playback with dynamic filtering from 2 to 44 kHz.
Page 33: Keyboard
Desktop Management Interface (DMI) provides tracking information about the system at power-on. At power-on, the system displays the system model number and the system board serial number which is created during manufacturing at NEC. DMI helps the user or service technician by providing information for quick technical sup- port or software and hardware upgrades.
Page 34: Security Features
Technical Information 1-21 An “Instant On/Off” feature conveniently puts the system into a full power reduction mode of operation at the press of a button. See Section 2, Setup and Operation for information about using power-saving modes. Security Features Security features in the PowerMate 486V Series provides protection against unauthorized access to the system.
Page 35: Section 2 Setup And Operation
Section 2 Setup and Operation This section provides information on hardware setup for PowerMate V486 series comput- ers. Setup includes unpacking, cabling, and powering up the system. It also includes con- figuring the system with the system setup programs. Section 3 provides information for installing options.
Page 36: Setup
Setup and Operation SETUP Connect the system components according to the following two subsections. Desktop Configuration – for setting up desktop system units. Minitower Configuration – for setting up minitower system units. Desktop Setup Set up the desktop systems by making the following connections. (See the following sub- section, Minitower Setup, if setting up a minitower computer).
Page 37 Setup and Operation Connect the keyboard and mouse cables to the back of the system unit. Connect the monitor and any other peripherals to the rear panel. See “External Multimedia Connections” and “Network Connectors” later in this subsection for multimedia and network connections. Figure Section 2-2 Peripherals Connections Press the power button to power-on the system.
Page 38 Setup and Operation If there is a problem, a series of beeps may occur. If this happens repeatedly after powering on the system, power off the system and see Section 4 for troubleshooting. NOTE: If the system displays a message indicating that system settings have changed, run Setup (see “System Configuration”...
Page 39: Minitower Setup
Setup and Operation Minitower Setup Set up the minitower systems by making the following connections. (See the preceding subsection, Desktop Setup, if setting up a desktop computer). At the rear of the system, set the voltage selector switch to 115V or 230V and in- sert the power cord into the power socket.
Page 40 Setup and Operation Connect the keyboard and mouse cables to the back of the system unit Connect the monitor and any other peripherals to the rear panel. See “External Multimedia Connections” and “Network Connectors” later in this subsection for multimedia and network connections. Figure Section 2-5 Minitower Peripherals Connections Press the power button to power-on the system.
Page 41: External Multimedia Connections
Setup and Operation The system has a built-in checking program that automatically tests the components at power-on. One beep indicates that the system has successfully completed its power-on test. If there is a problem, a series of beeps may occur. If this happens repeatedly after powering on the system, power off the system and see Section 4 for troubleshooting.
Page 42: Sound Board Jacks
Setup and Operation Sound Board Jacks Systems configured with multimedia components come with a sound board. The sound board provides jacks for connecting a microphone and external speakers to the system. Figure Section 2-7 Sound Board Connectors Line In Jack connects devices such as a cassette, DAT, or Minidisc player to the sound board for playback or recording.
Page 43: Connecting The Speakers
Setup and Operation MIDI/Joystick Connector connects a joystick or MIDI kit to the sound board. The joystick connector on the sound board is identical to that on a standard PC game control adapter or game I/O connector. Any analog joystick with a 15-pin D-sub connector can be connected to the joystick connector.
Page 44: Network Connectors
2-10 Setup and Operation Connect the right speaker cable (with the single plug) to the SPK OUT jack at the rear of the sound board at the rear of the system unit. Figure Section 2-8 Speaker Connections Connect the 6-volt AC adapter as follows. Remove any install batteries from the speakers.
Page 45 Setup and Operation 2-11 Provides network management support through Transcend ™ Etherlink SmartA- gent™ software, which is auto-installed with the drivers. The network interface board has connectors for thin, thick, or twisted-pair Ethernet con- nections. A Network Interface Card User’s Guide and drivers ship with network configured systems.
Page 46: System Configuration
2-12 Setup and Operation SYSTEM CONFIGURATION This subsection describes the Setup utility program that allows the system configuration in- formation to be viewed and changed. NOTE: The system ships from the factory with the correct system parameters for the configura- tion.
Page 47: How To Start Setup
Setup and Operation 2-13 How to Start Setup To start the Setup utility, follow these steps: Turn on or reboot the system. Setup displays the following message: Press <F2> to enter SETUP Press . Setup’s Main Menu window appears similar to the following screen. NOTE: The screen shown is typical of the sys- tem.
Page 48: Menu Bar
2-14 Setup and Operation The Field Help window or Item Specific Help — the area on the right side of the screen. This help area provides help information for the Setup option currently selected. The legend bar — the area at the bottom of the screen. The legend bar provides a summary of command keys for using Setup.
Page 49: Legend Bar
Setup and Operation 2-15 Legend Bar Use the keys listed in the legend bar on the bottom of the Setup menu to make the selec- tions or exit the current menu. The following table describes the legend keys and their al- ternates.
Page 50: General Help Window
2-16 Setup and Operation General Help Window Pressing Alt H on any menu brings up the General Help window that describes the legend keys and their alternates. The scroll bar on the right of any window indicates that there is more than one page of in- formation in the window.
Page 51: Ide Adapters
Setup and Operation 2-17 IDE Adapters IDE adapters control the IDE devices, such as IDE hard disk drives and IDE CD-ROM readers, in the system. The system uses two IDE controllers integrated on the system board. Setup supports up to four IDE devices, with an IDE adapter for each of the following con- figurations: 1 Master 1 Master, 1 Slave...
Page 52: Memory Shadow
2-18 Setup and Operation Table Section 2-3 IDE Hard Disk Parameters Parameter Options Description Autotype Fixed Automatically detected Enter Pressing causes the system to attempt to Disk by the system detect the hard disk type. If successful, Setup fills in the remaining fields on this menu and disk parameters need not be selected.
Page 53: Boot Sequence
Setup and Operation 2-19 Boot Sequence The system might require a Supervisor password to set Boot Sequence parameters. Select “Boot Sequence” directly from the Main Menu summary window to display the “Boot Op- tions” menu. Use the legend keys to make the selections and exit to the Main Menu. Use the following table to select the boot options.
Page 54: Advanced Menu
2-20 Setup and Operation Table Section 2-6 Numlock Parameters Parameters Options Description Numlock Auto (default) On or Off turns NumLock on or off at bootup. Auto turns NumLock on if it finds a numeric key pad. Keyboard auto- Fast (default) Sets the delay time after the key is held down and repeat rate Medium...
Page 55: Parity
Setup and Operation 2-21 Use the legend keys to make the selections and exit to the Main Menu. Use the following table to configure the peripherals: Table Section 2-7 Integrated Peripherals Parameters Feature Options Description COM1 port Disabled Selects a unique address and interrupt request COM2 port User-selectable for the listed COM ports.
Page 56: Large Disk Access Mode
2-22 Setup and Operation Large Disk Access Mode Select the Large Disk Access Mode parameter when configuring a large disk (see Table Section 2-8). Use the legend keys to make the selections and exit to the Main Menu. Table Section 2-8 Large Disk Parameters Parameter Options Description...
Page 57 Setup and Operation 2-23 See Table Section 2-9 for a description of the security features. Use the legend keys to make the selections and exit to the Main Menu. Table Section 2-9 System Security Options Feature Options Description Supervisor Password Disabled (default) Must set to enabled to set a Supervisor password.
Page 58: Power Menu
2-24 Setup and Operation Power Menu Selecting “Power” from the menu bar displays a screen with the power management pa- rameters described in the following table. A power-management system reduces the amount of energy used after specified periods of inactivity. The Power menu supports a Full On state, a Standby state with partial power re- duction, and a Suspend state with full power reduction.
Page 59: Exit Menu
Setup and Operation 2-25 Exit Menu Selecting “Exit” from the menu bar displays the following exit options: Save Changes & Exit Discard Changes & Exit Get Default Values Load Previous Values Save Changes. The following sections describe each of the options on the Exit Menu. Note that does not exit this menu.
Page 60: Save Changes
2-26 Setup and Operation Get Default Values To load all the default Setup values in the Setup menus, select Load ROM Default Values from the Main Menu. The program displays this message: Default values have been loaded Press <space> to continue If, during bootup, the BIOS program detects a problem in the integrity of values stored in NVRAM, it displays these messages: System CMOS checksum bad - run SETUP...
Page 61: Bios Update Utility
BIOS UPDATE UTILITY The NEC Bulletin Board Service (BBS) provides users with information about system software and hardware. Use the NEC BBS to obtain the latest version of the BIOS Update utility (BUU) and for VGA video drivers. To log onto the NEC BBS, follow these steps: NOTE: First time users must answer a new user questionnaire.
Page 62: System Board Jumpers
2-28 Setup and Operation To hang up and log off, follow these steps at the NEC Technologies Bulletin Board: Press (to continue). Enter Press (command for Goodbye/Hangup). Press Enter SYSTEM BOARD JUMPERS This subsection provides jumper setting information for the system board. Situations that...
Page 63 Setup and Operation 2-29 Figure Section 2-10 System Board Jumpers Figure Section 2-11 Password Clear Jumper...
Page 64 2-30 Setup and Operation Figure Section 2-12 Secondary Cache Jumpers Figure Section 2-13 Processor Clock Speed Jumper Figure Section 2-14 Processor Voltage Jumpers...
Page 65: Changing Jumper Settings
Setup and Operation 2-31 Figure Section 2-15 Jumpers JP3 through JP9, JP11, JP21 through JP23 Changing Jumper Settings To change system board jumper settings, use the following procedure. Use needle-nose pli- ers to move a jumper. CAUTION: If system conditions require dis- abling the password, see the following section “Clearing the Password.”...
Page 66: Clearing The Password
2-32 Setup and Operation Locate the jumper on the system board (see the figures earlier in this subsection). If required, remove any installed expansion boards to access the jumper (see “Board Removal” in Section 3). Change the jumper setting by lifting the plastic block and placing it on the appro- priate pins.
Page 67: Section 3 Options
All options except for the monitor require that the system unit top cover be removed. When installing the monitor, turn to the “NEC SVGA Monitor” subsection. When disassembling the system unit for option installation, follow these general rules.
Page 68: Desktop Cover Removal
Options DESKTOP COVER REMOVAL Remove the desktop cover as follows. Power off and unplug the keyboard, mouse, power and all other peripheral cables attached to the system unit. Remove the two cover screws. Figure Section 3-1 Desktop Cover Screws Slide the top cover toward the rear about one inch. Lift the top cover up and off.
Page 69: Minitower Cover Removal
Options MINITOWER COVER REMOVAL Remove the minitower cover as follows. Power off and unplug the keyboard, mouse, power cord and all other peripheral cables attached to the system unit. Remove the three cover screws. Figure Section 3-3 Minitower Cover Screws...
Page 70: Expansion Board(S)
Options Pull the top cover about two inches toward the front of the unit. Lift the top cover up and aff the system unit. Figure Section 3-4 Removing the Minitower Cover EXPANSION BOARD(S) The desktop system has four expansion slots, the minitower system has five expansion slots: three ISA slots in the desktop system, four ISA slots in the minitower system one shared PCI/ISA slot.
Page 71: Desktop Expansion Board Installation
Options Desktop Expansion Board Installation Install expansion boards into the desktop system as follows. Remove the top cover as previously described. Remove the expansion slot screw and cover. Save the expansion slot cover in the event the expansion board is removed in the future. To remove the expansion slot cover on the inside of the PCI/ISA backboard, re- move the expansion slot screws shown in Figure Section 3-6.
Page 72 Options When removing an expansion slot cover from the inside of the PCI/ISA-Bus backboard, separate the expansion slot L-bracket from the expansion slot cover by removing the screw shown in Figure Section 3-7. Reattach the L-bracket to the expansion board being installed. Figure Section 3-7 Removing the L-Bracket Install the expansion board into an expansion slot connector.
Page 73: Minitower Expansion Board Installation
Options Minitower Expansion Board Installation Install expansion boards into the minitower system unit as follows. Remove the top cover as previously described. Remove the expansion slot screw and cover. Save the expansion slot cover in the event the expansion board is removed in the future. Figure Section 3-9 Minitower Expansion Slots Install the expansion board into an expansion slot connector.
Page 74: Simm Upgrade Kits
Options SIMM UPGRADE KITS The system board comes standard with 8 MB of memory (16 MB in desktop multimedia systems). Memory over the first megabyte of RAM is extended RAM. SIMM upgrade kits are 70-ns SIMMs. NOTE: The metal plating on the SIMM stick connectors must match the metal plating in the SIMM sockets of the computer.
Page 75: Simm Installation
Options SIMM Installation Use the following procedures to install SIMMs in the system. Checking the Memory in the System Use the following procedure to locate SIMM sockets and to check the memory configura- tion in the system. Remove the top cover and any expansion boards covering the socket as previ- ously described.
Page 76 3-10 Options Figure Section 3-10 Locating SIMM Sockets In the Minitower Check the memory configuration that is presently in the system. Multimedia sys- tems with a DX4 processor (such as PowerMate V4100 multimedia models) ship with 16 MB of memory; other systems ship with 8 MB of memory. For optimized performance, fill SIMM sockets according to the following table using 4-MB, 8-MB, 16-MB, and 32-MB sticks.
Page 77: Installing Simms
Options 3-11 Table Section 3-1 Memory Configurations Total Memory SIMM Socket 1 SIMM Socket 2 36 MB 4 MB 32 MB 36 MB 32 MB 4 MB 40 MB 8 MB 32 MB 48 MB 16 MB 32 MB 48 MB 32 MB 16 MB 64 MB...
Page 78 3-12 Options Press the metal clips at the outer edges of the socket away from the SIMM. Push the SIMM away from the locking tabs and remove it from the socket. Figure Section 3-11 Removing a SIMM Install a SIMM as follows. CAUTION: Before installing a SIMM, reduce static discharge by touching the system’s metal chassis.
Page 79 Options 3-13 Locate the appropriate SIMM socket. Align the notched end of the SIMM with the correct end of the SIMM socket (see the following figure). Insert the SIMM at an angle into the socket. Carefully tilt the SIMM towards the locking tabs. Using equal pressure at the ends of the SIMM, push it until it locks under the metal clips at the ends of the socket.
Page 80: Secondary Cache
3-14 Options SECONDARY CACHE Secondary cache increases system performance. The system supports the addition of 256 KB of secondary cache. The system requires the following cache module options: one 32-KB by 8-bit tag cache module (28-pin) four 64-KB by 8-bit cache modules (32-pin). Use the following steps to install the secondary cache modules.
Page 81 Options 3-15 Figure Section 3-15 Locating the Cache Sockets in the Minitower Install the tag cache module as follows. Locate the notched end of the cache module. Align the notched end of the module with the notched end of the tag cache socket.
Page 82 3-16 Options Partially insert the module pins into the socket holes. Check that all pins are correctly inserted into the holes and that none are bent. CAUTION: Pins bend and break easily. To avoid bending any pins during insertion, use equal pressure on both ends of the module.
Page 83: Video Upgrade
Options 3-17 VIDEO UPGRADE The system comes with 1 MB of video dynamic RAM (DRAM). Video memory can be upgraded by adding two 256-KB by 16-bit video DRAM modules. The upgrade significantly increases video performance and allows the system to display more colors at higher resolutions.
Page 84 3-18 Options Figure Section 3-19 Locating Video DRAM Sockets in the Minitower Install a video DRAM module as follows. CAUTION: Reduce static electricity by touch- ing the metal frame of the system unit. Locate the notched end of the video DRAM socket (see the following figure). Align the notched end of the module over the notched end socket.
Page 85: Overdrive Processor Installation
CAUTION: Incorrect installation of the chip can damage the chip, system board, or both. Follow the installation instructions carefully. CAUTION: The system requires a heatsink on the upgrade chip. Heatsinks are available through NEC. Install an OverDrive processor into the system board as follows.
Page 86 3-20 Options Remove the top cover and any expansion boards covering the PGA/OverDrive socket as previously described. Locate the PGA/OverDrive socket on the system board. Figure Section 3-21 Locating the PGA/OverDrive Socket in the Desktop...
Page 87 Options 3-21 Figure Section 3-22 Locating the PGA/OverDrive Socket in the Minitower Lift the PGA/OverDrive socket lever all the way back and remove the processor currently installed. Figure Section 3-23 PGA/OverDrive Socket Lever...
Page 88 3-22 Options CAUTION: Before picking up the chip, reduce static discharge by touching the metal frame of the system unit. Insert the OverDrive processor by aligning the notched corner with inner align- ment hole of the socket. Figure Section 3-24 OverDrive Processor Alignment Set the jumper settings for the installed OverDrive processor (see Section 2, Setup and Operation).
Page 89: Storage Devices
This subsection provides the procedures for installing an optional storage device into the system unit. The system board supports up to two diskette drives and up to four IDE stor- age devices. The optional NEC diskette and hard disk drives are described first, then pro- cedures for installing the devices follow.
Page 90: Hard Disk Drives
Jumpers for the drives are set for single drive configurations. Jumper settings and their locations are shown in Figure Section 3-27 and Figure Section 3-28. NOTE: All NEC hard disk drives are shipped with the jumpers set for: master, one drive in- stalled.
Page 91: Desktop Storage Device Installation
Options 3-25 One drive installed- Power Connector (Factory Setting) Two drives installed- Slave Two drives installed- Master Cable Select Configuration (Dual Drives) Front of Drive Signal Connector Figure Section 3-27 WDAC2540, 540-MB Hard Disk Drive Drive 1 and Drive 2 Master (factory setting) Drive 2 Slave Figure Section 3-28 CFA850A, 850-MB Hard Disk Drive...
Page 92 3-26 Options Figure Section 3-29 System Board Cable Connections in the Desktop...
Page 93: Removing The 3 1/2-Inch Drive Bracket
Options 3-27 Removing the 3 1/2-inch Drive Bracket Remove the 3 1/2-inch drive bracket from the desktop system unit as follows. Remove the top cover as previously described. Remove the four 3 1/2-inch drive bracket screws (see Figure Section 3-30). Without removing the power and signal cables, place the 3 1/2-inch bracket with the diskette drive and hard disk drive attached on the power supply.
Page 94: Removing The Blank Panel
3-28 Options Removing the Blank Panel Remove the front panel assembly from the desktop chassis as follows. Remove the desktop cover and 3 1/2-inch diskette drive bracket as previously described. Remove the five front panel screws. Figure Section 3-31 Removing the Indicator Panel...
Page 95: Installing The Storage Device
Options 3-29 From the inside of the front panel, release the blank panel tabs and remove the panel. Figure Section 3-32 Removing the Blank Panel NOTE: The system unit chassis may also re- quire a slot cover punch-out to be removed. Reinstall the front panel.
Page 96 3-30 Options Figure Section 3-33 Connecting IDE Device Cables If installing an IDE CD-ROM reader, also connect the audio cable (see the in- structions that come with the reader). If installing a 1.2-MB diskette drive, connect the diskette drive signal cable and power cable.
Page 97 Options 3-31 Secure the 3 1/2-inch device in the slot as follows. Align the holes in the device with the holes in the device bracket. Secure the device to the bracket with the screws that come with the drive. Use three screws (two screws on one side, one screw on the other side).
Page 98 3-32 Options Replace the 3 1/2-inch device bracket in the 3 1/2-inch device slot. Secure the device bracket in place with the four screws removed earlier. Figure Section 3-37 Securing the 3 1/2-Inch Drive Bracket Replace the system unit cover. Connect external peripherals and power cables.
Page 99: Minitower Storage Device Installation
Options 3-33 MINITOWER STORAGE DEVICE INSTALLATION Use the following procedure to install a storage device in the minitower system. The fol- lowing figure shows cable connector connections on the system board and power supply. NOTE: Do not remove the 5 1/4-inch blank panel when installing a hard disk drive.
Page 100 3-34 Options Figure Section 3-39 Locating the Slot Cover Insert the device into the device slot. Connect the device cables as follows: If installing an IDE device, connect the appropriate IDE cable and power ca- ble. NOTE: If installing a hard disk, use the IDE ca- ble attached to the fast IDE port (IDE1 connec- tor) for the best performance.
Page 101 Options 3-35 If installing an IDE CD-ROM reader, also connect the audio cable (see the in- structions that come with the reader). If installing a 1.2-MB diskette drive, connect the diskette drive signal cable and power cable. NOTE: The installation of a second diskette drive requires the removal of the standard two- connector diskette drive cable and the installa- tion of a three-connector cable.
Page 102 3-36 Options Secure the device in the slot as follows. Align the holes in the device with the holes in the device bracket. Secure the device to the bracket with the four screws that come with drive (two screws on each side). Figure Section 3-42 Securing a 3 1/2-Inch Device Figure Section 3-43 Securing a 5 1/4-Inch Device...
Page 103 Options 3-37 If an accessible device was installed, such as a diskette drive or CD-ROM reader, locate the blank panels on the front of the system unit cover. Locate the blank panel for the device slot that contains the new device. Remove the blank panel by pressing the panel tabs inward from inside of the cover and pushing the blank panel out.
Page 104: External Peripherals
3-38 Options EXTERNAL PERIPHERALS This section contains instructions for connecting the following external peripherals to the system unit ports: a parallel printer to the parallel printer port two RS-232C devices, such as a pointing device and serial printer, to the serial 1 and serial 2 ports. Parallel Printer Use the following steps to connect a parallel printer to the system unit.
Page 105: Rs-232C Device
Options 3-39 Figure Section 3-46 Connecting a Printer Cable to the Minitower RS-232C Device Use the following procedure to connect an RS-232C device, such as a pointing device or serial printer, to the computer. Turn off and unplug the system unit and any external option connected to the system unit.
Page 106 3-40 Options Connect the RS-232C cable to one of the system’s serial ports and to the device. Secure the cable with the screws provided. Figure Section 3-47 Connecting an RS-232C Cable to the Desktop Figure Section 3-48 Connecting an RS-232C Cable to the Minitower...
Page 107: Section 4 Maintenance And Troubleshooting
Section 4 Maintenance and Troubleshooting This section provides information on maintaining and troubleshooting Ready Multimedia series computers. NEC service and information telephone numbers are listed in Table 4-1. Table Section 4-1 NEC Service and Information Telephone Numbers Service Call To order NEC spare parts In the U.S., call 1(800) 632-4525...
Page 108: Maintenance
Maintenance and Troubleshooting MAINTENANCE This subsection contains general information for cleaning and checking the computer's system unit, keyboard, and monitor. The system unit, 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 lu- brication is required.
Page 109: Keyboard
Maintenance and Troubleshooting Keyboard When necessary, inspect and clean the inside of the keyboard. Proceed as follows: Remove the four screws holding the keyboard enclosure together. NOTE: The keyboard and cable together are considered a whole-unit, field-replaceable as- sembly. Therefore, disassembly of the keyboard is necessary only when cleaning the inside.
Page 110: Mouse
Maintenance and Troubleshooting Mouse Under normal conditions, the mouse has a self-cleaning mechanism that prevents a buildup of dust or lint around the mouse ball and tracking mechanism. Periodically, however, the mouse ball must be cleaned. Use the following procedure to clean the mouse. Disconnect the mouse from the system unit.
Page 111: Troubleshooting
Appendix A. Jumper settings are explained in Section 2. Error Messages Messages may appear when running NEC utilities. Table Section 4-2 describes the possible error and warning messages that may be displayed when using the BIOS Update Utility.
Page 112: How To Load Remote Support Session
Standard modems do not operate on digital phone lines. With the system power off, insert the NEC System Recovery diskette into disk- ette drive A. The diskette comes with the system. Power on the system unit and monitor. A menu appears.
Page 113: Diagnosing And Solving Problems
Maintenance and Troubleshooting Diagnosing and Solving Problems One beep indicates that the computer has completed its power-on self-test. If intermittent beeping occurs, power off the computer and try again. If the beeping persists, see Table Section 4-3. Table Section 4-3 summarizes problems that may develop during computer operation and lists (in sequential order) suggested corrective actions.
Page 114 Maintenance and Troubleshooting Table Section 4-3 Problems and Solutions Problem Symptom Solution Operating system Intermittent beeping at power-on. 1. Check system configuration. does not boot Computer beeps more than once and is unable to complete boot-up. 2. Check all jumper settings and verify that drives are enabled (refer to Section 2).
Page 115 Maintenance and Troubleshooting Table Section 4-3 Problems and Solutions Problem Symptom Solution Hard disk Hard disk drive lamp does not light 1. Check cable connections malfunction but hard disk drive can be accessed between lamp and system board. Hard disk controller failure message 1.
Page 116 2. Check that the monitor's resolution matches the video setting or the video driver used (see Section 1). The NEC SVGA Monitor supports up to 1024 x 768. Most monitors don't support resolutions above 640 x 480 (VGA monitors).
Page 117: Dos Application Problems
Maintenance and Troubleshooting 4-11 DOS Application Problems Hardware conflicts occur when two or more peripheral devices contend for the same signal lines or channels. Conflicts between the sound board and another peripheral device may be due to the settings of the I/O address, interrupt, or DMA channel. The sound board's factory default settings are: Audio Interface Base address: 220H to 233H...
Page 118 4-12 Maintenance and Troubleshooting Table Section 4-4 Sound Board DOS Problems Problem Cause Solution SOUND or/and BLASTER The sound or/and Blaster Add the sound environment environment strings could not environment command may command to the be found. not be included in the AUTOEXEC.BAT file.
Page 119 Maintenance and Troubleshooting 4-13 Table Section 4-4 Sound Board DOS Problems Problem Cause Solution environment is used Shell=C:\COMMAND.COM /E:512 /P to the CONFIG.SYS file. Joystick is not working The joystick port on the sound Remove either the additional properly. board conflicts with the existing joystick in the system or joystick port in the system.
Page 120: Windows Application Problems
4-14 Maintenance and Troubleshooting Windows Application Problems Table Section 4-5 summarizes problems that may encounter when running the applications in Windows. Table Section 4-5 Sound Board Windows Problems Problem Cause Solution No sound when running One or more of the sound Check the SYSTEM.INI file by Windows applications.
Page 121 Maintenance and Troubleshooting 4-15 Table Section 4-5 Sound Board Windows Problems Problem Cause Solution Windows fails to install a The appropriate drivers might Check the [mci] section in the device driver or the message not have been included in the SYSTEM.INI using SYSEDIT.
Page 122: Diagnostic Output And Beep Codes
4-16 Maintenance and Troubleshooting Diagnostic Output and Beep Codes One beep indicates that the computer has completed its power-on self-test. If intermittent beeping occurs, power off the computer and try again. If the beeping persists, see Table Section 4-6 for diagnostic outputs and beep codes. The diagnostic port output codes are placed at the diagnostic status port (port 80) to indi- cate tests in progress and failed tests to someone with hardware that can detect the output.
Page 123 Maintenance and Troubleshooting 4-17 Table Section 4-6 Diagnostic Output and Beep Codes Diagnostic Port Output Beep Codes Description of Test or Failure E_MBIT EQU 13h 2-1-4 1st 64 K RAM chip or data line failure - bit 3 E_MBIT EQU 14h 2-2-1 1st 64 K RAM chip or data line failure - bit 4 E_MBIT...
Page 124 4-18 Maintenance and Troubleshooting Table 4-7 lists codes that are reported via the diagnostic port and the speaker only if MANLOOP EQU TRUE and the “manufacturing jumper” indicates loop on POST. Other- wise, these errors are reported via the screen and POST continues. Use of the manufactur- ing jumper requires working correctly configured CMOS.
Page 125: Disassembly And Reassembly
Section 5 Desktop Repair DISASSEMBLY AND REASSEMBLY This section contains step-by-step disassembly procedures for the desktop systems. The CD-ROM reader, hard disk drive, and 3 1/2-inch diskette drive are installed and included in these disassembly procedures. Reassembly is the reverse of disassembly. Each procedure is supported by a simplified disassembly illustration to facilitate removal.
Page 126 Desktop Repair 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. All screws are Phillips-head, unless otherwise specified. Label all removed connectors.
Page 127: Top Cover Removal
Desktop Repair Top Cover Removal Use the following procedure to remove the top cover. Power off and unplug all peripheral cables attached to the system unit. Remove the two cover screws. Figure Section 5-1 Top Cover Screws Slide the top cover toward the front about one inch. Lift the top cover up and off.
Page 128: Expansion Board Removal
Desktop Repair Expansion Board Removal Use the following procedure to remove an expansion board. Remove the top cover as previously described. Disconnect any cables leading from the expansion board. Remove the screw from the expansion slot bracket (see Figure Section 5-3). To remove a board on the inside of the PCI/ISA-Bus backboard, remove the ex- pansion slot screw shown in Figure Section 5-4.
Page 129 Desktop Repair Remove the board from the expansion slot. When removing an expansion board from the backside of the backboard, separate the expansion slot L-bracket from the expansion board by removing the screw. Figure Section 5-5 Removing the Expansion Slot L-Bracket...
Page 130: Pci/Isa-Bus Backboard Removal
Desktop Repair PCI/ISA-BUS Backboard Removal Use the following procedure to remove the PCI/ISA-Bus backboard from the system board. Remove the top cover and all expansion slot boards as previously described. Remove the two PCI/ISA-Bus backboard screws. Lift the backboard away from the bracket and out of the system unit. Figure Section 5-6 PCI/ISA-Bus Backboard Screws Front Panel Assembly Removal Use the following procedure to remove the front panel assembly from the system unit.
Page 131 Desktop Repair Remove the five front panel screws. Figure Section 5-7 Indicator Panel Screws Feed the two lamp and reset cables through the hole in the front of system unit chassis when removing the front panel assembly. Separate the lamps and reset button from the front panel assembly by pulling them out from their socket in the panel assembly.
Page 132: Power Button Cover Removal
Desktop Repair Power Button Cover Removal Use the following procedure to remove the power button cover from the front panel. Remove the top cover and front panel as previously described. Release the four power button tabs and push the tabs through the front panel. Remove the power button from the front of the panel.
Page 133: Speaker Assembly Removal
Desktop Repair Speaker Assembly Removal Use the following procedure to remove the speaker from the device cage. Remove the top cover as previously described. Unplug the speaker connector J18 on the system board. Remove the speaker screw from the side of the device cage. Lift the speaker from the slot in the device cage.
Page 134: Simm Removal
5-10 Desktop Repair SIMM Removal Use the following procedure to remove SIMM sticks from the system board. Remove the top cover, and any full size expansion boards as previously de- scribed. Spread apart the two clips at each end of the SIMM stick (the clips are part of the system board's connectors).
Page 135: 1/2-Inch Diskette And Hard Disk Drive Removal
Desktop Repair 5-11 3 1/2-inch Diskette and Hard Disk Drive Removal Use the following procedure to remove the 3 1/2-inch diskette drive and 3 1/2-inch hard disk drive. Remove the top cover as previously described. Unplug the diskette drive power cable and signal cable from the diskette drive. Unplug the hard disk drive power cable and signal cable from the hard disk drive.
Page 136 5-12 Desktop Repair Remove the three screws securing the diskette drive to the drive bracket. Remove the three screws securing the hard disk drive to the drive bracket. Pull the drives out from the front of the bracket. Figure Section 5-12 3 1/2-Inch Diskette and Hard Disk Drive Screws...
Page 137: 1/4-Inch Device Removal
Desktop Repair 5-13 5 1/4-Inch Device Removal Use the following procedure to remove a 5 1/4-inch device from the 5 1/4-inch device cage. Remove the top cover, front panel, and 3 1/2-inch drive bracket as previously de- scribed. Unplug all signal and power cables from the device(s) in the 5 1/4-inch device cage.
Page 138: 1/4-Inch Device Cage Removal
5-14 Desktop Repair 5 1/4-Inch Device Cage Removal Use the following procedure to remove the 5 1/4-inch device cage from the system unit. NOTE: Devices housed inside the device cage can be removed from the device cage without removing the device cage. See the preceding procedure.
Page 139: Power Supply Removal
Desktop Repair 5-15 Power Supply Removal Use the following procedure to remove the power supply from the system unit. Remove the top cover and front panel as previously described. Unplug the two power cables attached to the system board's connectors. Unplug the power cables from all installed devices.
Page 140: System Board Removal
5-16 Desktop Repair Remove the four screws holding the power supply to the system unit. Slide the power supply toward the system board to release the two tabs at the front, then lift it out of the system unit. 1 of 2 Tabs Power Supply Screws...
Page 141 Desktop Repair 5-17 Remove the seven screws that hold the system board to the system unit chassis. Remove the system board out the side of the system unit. Figure Section 5-17 System Board Connectors and Screws Table Section 5-2 System Board Connectors Connector Connector Label Power supply...
Page 142: Battery Removal
PowerMate V486 Series desktop computers. Table Section 5-3 lists the field- replaceable parts for the computer. Figure Section 5-19 is the illustrated parts breakdown. In the U.S., call 1(800) 632-4525 to order NEC spare parts. To order options in the U.S., call the local sales office.
Page 143 Desktop Repair 5-19 Table Section 5-3 PowerMate V486 Desktop Field-Replaceable Parts List* Item Description Part Number 3 1/2-inch x 1-inch, 850-MB Hard Disk 158-050395-337 3 1/2-inch x 1-inch, 1.44-MB Diskette Drive 808-870954-101A 3 1/2-inch Drive Bracket 158-050685-109 Desktop Chassis 158-050685-002 PCI/ISA-Bus Backboard Bracket 158-050685-006 Diskette Drive Signal Cable...
Page 144 5-20 Desktop Repair Table Section 5-3 PowerMate V486 Desktop Field-Replaceable Parts List* Item Description Part Number NEC Mouse (PS/2-comptible) 158-050484-002...
Page 145 Desktop Repair 5-21 Figure Section 5-19 PowerMate V486 Desktop Illustrated Parts Breakdown* ____________ * This data was prepared February 1995. For an up-to-date listing of spare parts, please call FastFacts (800) 366-0476 and order document number 42181169.
Page 146 5-22 Desktop Repair Table Section 5-4 lists the PowerMate V486 desktop options. Table Section 5-4 PowerMate V486 Desktop Options* Description Part Number 4-MB SIMM Upgrade Kit (1 MB x 32-bit)** 158-053746-000 8-MB SIMM Upgrade Kit (2 MB x 32-bit)** 158-053746-001 16-MB SIMM Upgrade Kit (4 MB x 32-bit)** 158-053746-003 32-MB SIMM Upgrade Kit (8 MB x 32-bit)**...
Page 147: Disassembly And Reassembly
Section 6 Repair DISASSEMBLY AND REASSEMBLY This section contains step-by-step disassembly procedures for the computer. The CD-ROM reader, hard disk drive, and 3 1/2-inch diskette drive are installed and included in these dis- assembly procedures. Reassembly is the reverse of disassembly. Each procedure is sup- ported by a simplified disassembly illustration to facilitate removal.
Page 148 Minitower Repair 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. All screws are Phillips-head, unless otherwise specified. Label all removed connectors.
Page 149: Top Cover Removal
Minitower Repair Top Cover Removal Use the following procedure to remove the top cover. NOTE: Unplug the power cord before disas- sembling the system unit. Voltage is present in- side the system unit even after the power is off. All voltage is removed only when the power cord is unplugged.
Page 150 Minitower Repair Slide the top cover toward the front about one inch. Lift the top cover up and off the system unit chassis. Figure Section 6-2 Removing the Top Cover...
Page 151: Expansion Board Removal
Minitower Repair Expansion Board Removal Use the following procedure to remove the installed expansion board. Remove the top cover as previously described. Disconnect any cables leading from the expansion board. Remove the screw from the expansion slot bracket. Figure Section 6-3 Expansion Slot Screw...
Page 152: Pci/Isa-Bus Backboard Removal
Minitower Repair PCI/ISA-BUS Backboard Removal Use the following procedure to remove the PCI/ISA-Bus backboard. Remove the top cover and all expansion boards as previously described. Remove the two PCI/ISA-Bus backboard bracket screws. Pull the backboard and bracket and out of the system unit. Figure Section 6-4 PCI/ISA-Bus Backboard Bracket Screws Separate the PCI/ISA-Bus backboard from the bracket by removing the two screws shown in Figure Section 6-5.
Page 153: Front Panel Assembly Removal
Minitower Repair Front Panel Assembly Removal Use the following procedure to remove the front panel assembly . Remove the top cover as previously described. Remove the seven front panel screws from inside the top cover. Feed the two lamp and reset cables through the hole in the front of system unit chassis when removing the front panel assembly.
Page 154: Power Button Cover Removal
Minitower Repair Power Button Cover Removal Use the following procedure to remove the power button cover. Remove the top cover as previously described. Release the four power button tabs from the inside of the front panel and push the tabs through the front panel. Remove the power button from the front of the panel.
Page 155: Speaker Assembly Removal
Minitower Repair Speaker Assembly Removal Use the following procedure to remove the speaker. Remove the top cover as previously described. Unplug the speaker connector J18 on the system board. Slide the speaker over the raised spot and out from the speaker tabs. Remove the speaker from the system unit.
Page 156: Simm Removal
6-10 Minitower Repair SIMM Removal Use the following procedure to remove the SIMM sticks. Remove the top cover and any full size expansion boards as previously described. Spread apart the two clips at each end of the SIMM stick (the clips are part of the system board's connectors).
Page 157: 1/2-Inch Diskette Drive Removal
Minitower Repair 6-11 3 1/2-inch Diskette Drive Removal Use the following procedure to remove the 3 1/2-inch diskette drive. Remove the top cover as previously described. Unplug the diskette drive power cable and signal cable from the diskette drive. NOTE: When reinstalling the diskette drive, note that all power cables are keyed to fit only in the correct position.
Page 158 6-12 Minitower Repair Remove the two 3 1/2-inch diskette drive bracket screws. Figure Section 6-11 Diskette Drive Bracket Screws Slide the 3 1/2-inch diskette drive with bracket out of the system unit. (The bracket works like a drawer and will stop when fully out.) Remove the four 3 1/2-inch diskette drive screws;...
Page 159: 1/2-Inch Hard Disk Drive Removal
Minitower Repair 6-13 3 1/2-inch Hard Disk Drive Removal Use the following procedure to remove the 3 1/2-inch hard disk drive. Remove the top cover as previously described. Unplug the hard disk drive power cable and signal cable from the hard disk drive. NOTE: When reinstalling the drives, note that all power cables are keyed to fit only in the cor- rect position.
Page 160 6-14 Minitower Repair Remove the four 3 1/2-inch hard disk drive screws; two on each side. Remove the 3 1/2-inch hard disk drive out from inside the chassis. Figure Section 6-13 Removing a 3 1/2-Inch Device...
Page 161: 1/4-Inch Device Removal
Minitower Repair 6-15 5 1/4-Inch Device Removal Use the following procedure to remove a 5 1/4-inch device from the 5 1/4-inch device cage. Remove the top cover as previously described. Unplug all signal and power cables from the device(s) in the 5 1/4-inch device cage.
Page 162: 1/4-Inch Device Cage Removal
6-16 Minitower Repair 5 1/4-Inch Device Cage Removal Use the following procedure to remove the 5 1/4-inch device cage from the system unit. Remove the top cover as previously described. Unplug all signal and power cables from the device(s) in the 5 1/4-inch device cage.
Page 163: Power Supply Removal
Minitower Repair 6-17 Power Supply Removal Use the following procedure to remove the power supply. Remove the top cover as previously described. Unplug the two power cables attached to the system board's connectors. Unplug the power cables from all installed devices. Remove the two screws securing the power button to the front of the system unit.
Page 164: System Board Removal
6-18 Minitower Repair Remove the five screws securing the power supply to the system unit and remove the power supply. Figure Section 6-17 Power Supply Screws System Board Removal Use the following procedure to remove the system board. Remove the following components as previously described. top cover expansion slot boards PCI/ISA-Bus backboard...
Page 165: Power Lamp Connector
Minitower Repair 6-19 Remove and label all cables connected to the system board. Figure Section 6-18 provides the general locations of the connectors for the system board. Table Section 6-2 identifies the correct connector. Appendix A provides the pin assignments for each connector. Remove the seven screws that hold the system board to the system unit chassis.
Page 166 6-20 Minitower Repair Table Section 6-2 System Board Connectors Connector Connector Label Power supply Fast IDE hard disk drive connector (IDE1) Standard IDE connector (IDE2) Diskette drive connector Speaker Keylock Turbo LED Turbo Switch Power lamp Hard disk drive busy lamp JP15 Reset Button Battery Removal...
Page 167 Minitower Repair 6-21 Figure Section 6-19 Battery Replacement After installing a new battery, the time, date, etc. may need to be reset. Run the Setup utility that came with the system (see Section 2).
Page 168 Minitower Repair Illustrated Parts Breakdown This subsection contains the illustrated parts breakdown (IPB) and NEC part numbers for the PowerMate V466 minitower computer. Table Section 6-3 lists the field-replaceable parts for the computer. Figure Section 6-20 is the illustrated parts breakdown.
Page 169 Minitower Repair 6-23 Table Section 6-3 PowerMate V466 Minitower Field-Replaceable Parts List* Item Description Part Number NEC Mouse (PS/2-compatible) 158-050484-002 Keyboard 158-050707-000 Speaker Assembly (internal) 158-050698-003 Power Cord 158-050697-000 PCI/ISA-Bus Backboard Bracket 158-050698-006 ____________ * This data was prepared February 1995. For an up-to-date listing of spare parts, please call FastFacts (800) 366-0476...
Page 170 6-24 Minitower Repair Figure Section 6-20 PowerMate V466 Minitower Illustrated Parts Breakdown* ____________ * This data was prepared February 1995. For an up-to-date listing of spare parts, please call FastFacts (800) 366-0476 and order document number 42181169.
Page 171 1-MB Video DRAM Module 1.2-MB Diskette Drive Kit 158-053476-000 540-MB Hard Disk Drive Kit 158-050395-322 850-MB Hard Disk Drive Kit 158-050395-337 NEC SVGA Monitor 158-053605-000 MultiSync 3FGe Color Monitor 08119705 MultiSync 4FGe Color Monitor 08119709 MultiSync 5FGe Color Monitor 08119343...
Page 172 6-26 Minitower Repair Table Section 6-5 lists PowerMate V466 minitower documentation and packaging. Table Section 6-5 PowerMate V466 Minitower Documentation and Packaging* Description Part Number PowerMate V486 Series System User's Guide 819-181119-000 PowerMate V486 Series Quick Setup 819-181143-000 PowerMate V486 Series Service and Reference Manual 819-181169-000 Network Card User’s Guide 819-181183-000...
Page 173 Index APM, 2-24 Desktop controls, 2-3 documentation, 5-21 options, 5-21 Battery (desktop) voltage selector switch, 2-2 removal, 5-18 Desktop Management Interface (DMI), 1- Battery (minitower) removal, 6-20 Desktop system unit BIOS Update utility, 1-6 chassis, 1-1 error messages, 4-5 front panel, 1-1 Device cage (desktop) removal, 5-14 Cables...
Page 174 Index-2 power supply, 6-17 removal, 6-7 sequence, 6-1 Full Power On mode, 1-17 SIMM, 6-10 speaker, 6-9 system board, 6-18 Graphics accelerator, 1-11 top cover, 6-3 Graphics support, 1-11, 4 Disk lamp, 1-17 Diskette drive, 1-17 connecting, 3-30, 3-35 Hard disk (minitower) Diskette drive (desktop) removal, 6-13 removal, 5-11...
Page 175 Index-3 power, 1-17 Password, 2-32 Password jumper, 2-28 PCI bus, 1-14, 1-15 PCI local bus. See PCI bus Maintenance PCI/ISA-Bus backboard (desktop) cleaning, 4-2 removal, 5-6 keyboard, 4-3 PCI/ISA-Bus backboard (minitower) mouse, 4-4 removal, 6-6 routine checks, 4-4 Plug and Play support, 1-20 system unit, 4-2 Power button, 1-17 Memory...
Page 176 Index-4 system memory map, 1-7 Secondary cache jumpers, 2-28 video BIOS, 1-6 Secondary IDE channel, 1-14 video controller, 1-11 Security features, 1-21 Video Memory, 1-11 Serial device, 3-39 System board (desktop) Serial port removal, 5-16 connector, 3-40 System board (minitower) Serial ports, 1-16 removal, 6-18 Serial printer, 3-39...
Page 177 Index-5 Video performance, 3-17 Virus protection, 1-21 Voltage selector switch desktop, 2-2 minitower, 2-5 Weight, 6 ZIF socket, 3-19...
Page 178 (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 179 BATTERY REPLACEMENT A lithium battery in your computer maintains system configuration information. In the event that the battery fails to maintain system configuration information, NEC recommends that you replace the battery. See Sections 5 and 6 for battery replacement information.

NEC PowerMate V486 Series Service Manual

Section 1 Technical Information

Section 2 Setup and Operation

Section 3 Options

Section 4 Maintenance and Troubleshooting

Section 5 Desktop Repair

Section 6 Minitower Repair

Appendix A Connector Pin Assignments

Quick Links

Troubleshooting

Related Manuals for NEC PowerMate V486 Series

Summary of Contents for NEC PowerMate V486 Series

Table of Contents