Page 1 The information disclosed in this document, including all designs and related materials, is the valu- able property of NEC Corporation (NEC) and/or its licensors. NEC and/or its licensors, as ap- propriate, 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 Page Preface ..........................xi Abbreviations........................xiii Section 1 Technical Information Desktop System Unit......................1-2 Minitower System Unit ...................... 1-3 System Board ......................1-4 Processor ......................1-6 Secondary Cache ....................1-6 Flash ROM ......................1-6 Power Management.................... 1-7 I/O Addressing....................1-8 System Memory....................
Page 3 Contents Microphone ....................... 1-19 Keyboard ......................... 1-19 Mouse ..........................1-19 Power Management ......................1-19 Plug and Play........................1-19 Desktop Management Interface..................1-20 DMI Components...................... 1-21 Manageable Products....................1-21 CI Module......................... 1-21 MIF Browser......................1-21 Usage ........................1-22 Troubleshooting ......................1-22 Section 2 Setup and Operation Unpacking and Repacking....................
Page 4 Contents Large Disk Access Mode ................... 2-25 Security Menu......................2-26 Power Menu......................2-27 Exit Menu........................2-28 Save Changes & Exit ..................2-29 Discard Changes & Exit..................2-29 Get Default Values....................2-29 Load Previous Values..................2-30 Save Changes..................... 2-30 Bios Update Utility......................2-30 System Board Jumpers......................
Page 5 Troubleshooting......................... 4-5 Error Messages......................4-5 Diagnosing and Solving Problems ................4-7 Beep Codes....................... 4-11 Bios Update Utility......................4-11 NEC Bulletin Board Service..................4-12 Using the BIOS Update Utility..................4-13 Section 5 Desktop Repair Disassembly and Reassembly..................... 5-1 Top Cover Removal....................5-3...
Page 6 Contents Expansion Board Removal..................5-4 ISA/PCI-BUS Backboard Removal................5-7 3 1/2-inch Diskette and Hard Disk Drive Removal............5-8 Front Panel Assembly Removal.................. 5-10 Power Button Cover Removal..................5-11 Speaker Assembly Removal..................5-12 SIMM Removal......................5-13 Optional 5 1/4-Inch Device Removal................5-14 5 1/4-Inch Device Cage Removal................
Page 7 viii Contents VGA Interface Connector Pin Assignments................ A-5 Speaker Connector Pin Assignments.................. A-5 Power Supply Connector ....................A-6 Keyboard and Mouse Connectors..................A-6 Power Lamp Connector ....................A-7 Hard Disk Drive Busy Lamp Connector................A-7 Fan Connector ........................A-7 Suspend Button Connector....................A-8 Diskette Drive Interface Pin Assignments ................
Page 8 Contents Desktop Voltage Selector Switch................ 2-2 Desktop Peripherals Connections................ 2-3 Desktop Network Board Connections ..............2-4 Desktop Multimedia Connections................ 2-5 Desktop Power Button, Lamps, and Suspend Button........... 2-6 Minitower Voltage Selector Switch..............2-7 Minitower Peripherals Connections ..............2-8 Minitower Network Board Connections.............. 2-9 Minitower Sound/Fax/Modem Board Connectors ..........
Page 9 Contents 3-20 3 1/2-Inch Drive Bracket Screws................ 3-24 3-21 Desktop Front Panel Removal................3-25 3-22 Blank Panel Removal..................3-26 3-23 Desktop 5 1/4-Inch Device Screws..............3-27 3-24 Desktop 5 1/4-Inch Diskette Drive Cables............3-28 3-25 Desktop 5 1/4-Inch Hard Disk Drive Cables............3-29 3-26 Front Panel Removal...................
Page 10 Power Supply Screws..................6-20 6-19 Chassis Support Bracket Screws ................ 6-21 6-20 PowerMate VP75 Series Minitower Illustrated Parts Breakdown* ...... 6-25 System Board Layout ..................A-1 Serial Interface (J3/J10) ..................A-3 Parallel Interface (J15)..................A-4 Power Supply Connector (J8) Pin Assignments ........... A-6 Rear View of the Quadruple Speed Reader............
Page 11 SIMM Upgrade Problems and Solutions ............. 3-17 Video DRAM Module Problems and Solutions ........... 3-20 Optional 5 1/4-Inch Device Problems and Solutions ..........3-38 NEC Service and Information Telephone Numbers..........4-1 System Error Messages ..................4-5 ISA NMI Error Messages .................. 4-7 Problems and Solutions..................
Page 12 Contents xiii Speaker Connector (J18) Pin Assignments............A-5 Keyboard (J1) and Mouse (J2) Connector Pin Assignments ........ A-6 Power Lamp Connector (J16) Pin Assignments........... A-7 Hard Disk Drive Lamp Connector (J14) Pin Assignments........A-7 Fan Connector Pin Assignments................A-7 Suspend Button Connector (J11) Pin Assignments..........A-8 Diskette Drive Connector (J5) Pin Assignments...........
Page 13: Preface
Section 6, Minitower Repair, includes a list of NEC service information and telephone num- bers that provide access to the NEC Bulletin Board System (BBS), FastFacts, and Technical In- formation Bulletins. Included are minitower disassembly and reassembly procedures along with an illustrated parts breakdown.
Page 14: Abbreviations
xvii Abbreviations ampere DMAC DMA controller alternating current disk operating system advanced technology DRAM dynamic RAM (IBM PC) error checking and correction Bulletin Board System Enhanced Graphics Adapter binary-coded decimal EPROM erasable and programmable BIOS Customized Utility BIOS basic input/output system EVGA Enhanced Video Graphics Array...
Page 15 xviii Abbreviations kilo (1024) quad flat pack kilo (1000) random-access memory kilobyte RAMDAC RAM digital-to-analog kilogram row address strobe kilohertz red green blue pound RGBI red green blue intensity light-emitting diode read-only memory least-significant bit revolutions per minute large-scale integration read mega real-time clock...
Page 16: Section 1 Technical Information
Section 1 Technical Information The PowerMate VP75 Series includes the PowerMate VP75D (desktop) and PowerMate VP75MT (minitower) systems in several configurations. The configurations include: desktop and minitower diskless systems (diskette drive, no hard disk) desktop and minitower hard disk systems (diskette drive, hard disk)
Page 17: Desktop System Unit
Technical Information DESKTOP SYSTEM UNIT The desktop chassis provides an enclosure for the system board, power supply, four storage de- vice slots, a five-connector PCI/ISA backboard, and four expansion slots. The expansion slots include three ISA slots and one shared PCI/ISA slot. For network configurations, one slot has a network board installed and the three remaining slots are empty.
Page 18: Minitower System Unit
Technical Information MINITOWER SYSTEM UNIT The minitower chassis provides an enclosure for the system board, power supply, five storage device slots, a six-connector PCI/ISA backboard, and five expansion slots. The expansion slots include three ISA slots, one dedicated PCI slot, and one shared PCI/ISA slot. For network configurations, one slot has a network board installed and the four remaining slots are empty.
Page 19: System Board
Technical Information System Board The system board is identical for all configurations. The system board contains a Flash ROM which is upgradeable through the BIOS Update utility (see Section 2). Key features of the system board are as follows: Intel Pentium 75 MHz Pentium processor 16 kilobyte (KB) internal dual write-back cache integrated on the processor 256-KB write-back secondary cache memory PCI local bus for fast data transfer...
Page 20: System Board Chips
Technical Information PCI/ISA backboard configurations desktop: three ISA expansion slots and one shared PCI/ISA slot minitower: three ISA expansion slots, one dedicated PCI slot, and one shared PCI/ISA slot external connectors providing an interface for the following external devices: VGA-compatible monitor ®...
Page 21: Processor
Technical Information Processor The PowerMate VP series of computers use the 75 MHz Pentium processor with an internal speed of 75 MHz and an external speed of 50 MHz. The processor has 16 KB of write- back internal cache, 8 KB for instructions and 8 KB for data. A math coprocessor is integrated in the processor.
Page 22: System Memory Map
Technical Information The Flash ROM allows the BIOS to be upgraded with the BIOS Update utility without removing the ROM (see Section 2, Setup and Configuration). The BIOS can only be repro- grammed by powering on the system with the BIOS Update utility diskette in Drive A. The BIOS programs execute the Power-On Self-Test, initialize processor controllers, and inter- act with the display, diskette drives, hard disks, communication devices, and peripherals.
Page 23: Power Management
Technical Information Power Management Each system incorporates power management features that lower power consumption when there is no activity detected from the keyboard, mouse, diskette drive, CD-ROM reader, or hard disk drive after a pre-defined period of time. As soon as activity is detected the system resumes where it left off.
Page 24 Technical Information Table Section 1-3 I/O Address Map Address (Hex) I/O Device Name 0073 Reserved for system board configuration 0075 Reserved for system board configuration (read only) 0078 BIOS timer 0080-008F DMA page master 00A0-00A1 Interrupt controller 2 00C0-00DE DMA controller 2 (channel 4-7) 00F0 Reset numeric error 0170-0177...
Page 25: System Memory
1-10 Technical Information System Memory The system comes standard with 8 MB of memory (16 MB in multimedia configurations), 640 KB of base memory and 7 MB of extended memory. System memory can be expanded up to 128 MB, using optional single in-line memory modules (SIMMs) installed in SIMM sockets. Four SIMM sockets are integrated on the system board.
Page 26: Video Controller
Technical Information 1-11 Table Section 1-4 Interrupt Level Assignments Interrupt Priority Interrupt Device IRQ02 Cascade (INT output from slave) IRQ03 COM2* IRQ04 COM1* IRQ05 Parallel Port 2 IRQ06 Diskette Drive Controller* IRQ07 Parallel Port 1* IRQ08 Real-time clock IRQ09 Available IRQ10 Available IRQ11...
Page 27: Video Memory
1-12 Technical Information The VESA display power management signaling (DPMS) standard is supported, enabling stand- by, suspend, and off power saving modes. This includes the ability to independently stop HSYNC or VSYNC and hold them at a static level. Additionally the RAMDAC may be pow- ered-down and the clock frequencies lowered for further power savings.
Page 28 Technical Information 1-13 Table Section 1-5 Video Resolutions and Frequencies Memory Resolution Required Color Video Clock (Hz) Horiz Sync (KHz) 800 x 600 1 MB 95(i) 33.8 800 x 600 1 MB 35.2 800 x 600 1 MB 44.5 800 x 600 1 MB 48.0 800 x 600...
Page 29: Ide/Pci-Bus Backboard
1-14 Technical Information IDE/PCI-Bus Backboard The desktop IDE/PCI-bus backboard provides three ISA expansion slots and one shared IDE/PCI expansion slot. The backboard is plugged into the bus connector on the desktop system board. The minitower PCI/IDE bus backboard provides three ISA expansion slots, one dedi- cated PCI expansion slot, and one shared IDE/PCI expansion slot.
Page 30: Parallel Interface
Technical Information 1-15 Parallel Interface The system has a 25-pin parallel port on the system board. Specifications for this port conform to the IBM-PC standards. The BIOS has automatic ISA printer port sensing. If the BIOS detects an ISA printer port mapped to the same address, the built-in printer port is disabled.
Page 31: Indicator Panel
1-16 Technical Information NOTE: Any interrupts used for the built-in serial ports are not available for ISA parallel ports. Table Section 1-7 Serial Port Addressing and Interrupts Starting I/O Address Interrupt Level Port 3F8* IRQ04 COM1 2F8* IRQ03 COM2 IRQ04 COM3 IRQ03 COM4...
Page 32: Diskette Drive
Technical Information 1-17 DISKETTE DRIVE Up to two diskette drives are supported in the system. The installed drive is connected by a single ribbon cable with one drive connector. An optional cable with two drive connectors allows the connection of two drives. The system refers to the diskette drives as A and B. Drive A is for the first drive, B is for a second optional diskette drive.
Page 33: Multimedia Components
1-18 Technical Information MULTIMEDIA COMPONENTS Systems configured for multimedia come with a quad-speed CD-ROM reader, sound board, a pair of speakers, and microphone. The following subsections briefly describe each. Information on attaching the speakers and microphone is in Section 2, Setup and Operation. Quad-Speed CD-ROM The IDE quad-speed CD-ROM reader is pre-installed as drive E on multimedia configurations.
Page 34: Microphone
Technical Information 1-19 Treble boost switch Built-in power booster Power source: 6 volt (V) AC power adapter or four “C” batteries (not included) Speaker impedance: 8 ohms Power output: 3.6 watts Frequency response: 60 – 15000 Hz 3.5 mm stereo plug Microphone The microphone that comes with the multimedia systems record voice and sound into computer data files.
Page 35: Plug And Play
The ICU is used to eliminate the guess work from the configuration procedure. Although most Plug and Play boards come with an ICU, an ICU can be obtained from the NEC Bulletin Board Service (see Section 4, Troubleshooting and Maintenance).
Page 36: Dmi Components
CI to communicate with the SL and provides management for a set of compo- nents defined in the PC system group standard MIF. The NEC implementation of this MIF pro- vides management for a variety of attributes. Windows starts the CI module which must be running in the background.
Page 37: Usage
Browser, it restores all the viewing screens to the last known position. Usage To start the Browser, double click on the MIF Browser icon in the NEC DMI Interface group. The Browser is easy to use. For example, to obtain the serial number, first position the cursor over the NEC system component and double click to expand it.
Page 38 Technical Information 1-23 Look at the autoexec.bat file to see if the line DIR%\WIN16\BIN\NECDMI.EXE is present. Make sure the file NECDMI.DAT is located in the \WIN16\BIN subdirectory. Check that NECCI.EXE is running.
Page 39: Section 2 Setup And Operation
Section 2 Setup and Operation This section provides information on hardware setup for the PowerMate VP series computers. 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 40: Desktop Voltage Selector Switch
Setup and Operation Desktop Setup Set up the desktop systems by making the following connections. (See the following subsection, Minitower Setup, if setting up a minitower system). At the rear of the system, set the voltage selector switch to 115V or 230V and plug the power cord into the system power socket (see Figure Section 2-1).
Page 41: Desktop Peripherals Connections
Setup and Operation Connect the keyboard and mouse cables to the back of the system unit (see Figure Section 2-2). Connect the monitor and any other peripheral cables to the rear panel (see Figure Section 2-2). Figure Section 2-2 Desktop Peripherals Connections...
Page 42: Desktop Network Board Connections
Setup and Operation Connect the network cables (network configurations only) to the rear panel (see Figure Section 2-3). Figure Section 2-3 Desktop Network Board Connections...
Page 43: Desktop Multimedia Connections
Setup and Operation If installing a multimedia system, connect multimedia components to the sound board as shown in Figure Section 2-4. Figure Section 2-4 Desktop Multimedia Connections...
Page 44: Desktop Power Button, Lamps, And Suspend Button
Setup and Operation Press the power button to power-on the system. The power lamp lights. Press the suspend button (see Figure Section 2-5) to place the unit in the power man- agement mode. Figure Section 2-5 Desktop Power Button, Lamps, and Suspend Button The system has a built-in checking program that automatically tests the components at power-on.
Page 45: Minitower Setup
Setup and Operation all options are properly installed (see Section 3 for option installation). Minitower Setup Set up the minitower systems by making the following connections. (See the preceding subsec- tion, Desktop Setup, if setting up a desktop computer.) At the rear of the system, set the voltage selector switch to 115V or 230V and plug the power cord into the power socket (see Figure Section 2-6).
Page 46: Minitower Peripherals Connections
Setup and Operation Connect the keyboard and mouse cables to the back of the system unit (see Figure Section 2-7). Connect the monitor and any other peripheral cables to the rear panel (see Figure Section 2-7). Figure Section 2-7 Minitower Peripherals Connections...
Page 47: Minitower Network Board Connections
Setup and Operation Connect the network cables (network configurations only) to the rear panel (see Figure Section 2-9). Figure Section 2-8 Minitower Network Board Connections...
Page 48: Minitower Sound/Fax/Modem Board Connectors
2-10 Setup and Operation If installing a multimedia system, connect mulitmedia components to the sound board (Figure Section 2-9). Figure Section 2-9 Minitower Sound/Fax/Modem Board Connectors...
Page 49: Minitower Power Button, Indicators, And Suspend Button
Setup and Operation 2-11 Press the power button to power-on the system (see Figure Section 2-10). The power lamp lights. Press the suspend button to place the unit in the power management mode. Figure Section 2-10 Minitower Power Button, Indicators, and Suspend Button The system has a built-in checking program that automatically tests the components at power-on.
Page 50: Cd-Rom Reader
2-12 Setup and Operation CD-ROM READER A quad-speed CD-ROM reader (see Figure Section 2-11) comes pre-installed as drive E in the multimedia configurations. The reader is set as a master device, and is connected to the secondary IDE/PCI port on the system board. Use the CD-ROM reader to load and start programs from a CD.
Page 51: External Multimedia Connections
Setup and Operation 2-13 EXTERNAL MULTIMEDIA CONNECTIONS This subsection explains how to connect multimedia components to the system’s multimedia con- nectors (multimedia configurations only). The connectors are located on the sound board at the rear of the system and on the CD-ROM reader at the front of the system. The sound board has a 15-pin connector and three jacks that attach multimedia components to the back of the system.
Page 52: Ready 9520 Speaker Connections
2-14 Setup and Operation Connect the left speaker cable (with the dual plug) to the right speaker connector la- beled TO LEFT SPEAKER (see Figure Section 2-12). Connect the right speaker cable (with the single plug) to the SPK OUT jack on the sound board at the rear of the system unit.
Page 53: System Configuration
Setup and Operation 2-15 SYSTEM CONFIGURATION 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, customizing the system, or adding optional hardware, Setup does not need to be run.
Page 54: How To Start Setup
2-16 Setup and Operation 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 system.
Page 55: Menu Bar
Setup and Operation 2-17 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 56: Legend Bar
2-18 Setup and Operation 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 Section 2-1 describes the legend keys and their alter- nates.
Page 57: General Help Window
Setup and Operation 2-19 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 information in the window.
Page 58: Ide Adapters
2-20 Setup and Operation Table Section 2-2 Legend Bar Main Menu Parameters Parameter Options Description by the system at power-on. 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 configura- tions: 1 Master...
Page 59: Ide Hard Disk Parameters
Setup and Operation 2-21 IDE Adapter 0 configures the primary IDE/PCI port (primary channel), IDE Adapter 1 config- ures the secondary IDE port. Each IDE Adapter parameter has a right-pointing arrow to the left of it. Selecting the option dis- plays IDE hard disk parameters.
Page 60: Memory Shadow
2-22 Setup and Operation Memory Shadow For memory shadowing parameters, select “Memory Shadow” directly from the Main Menu summary window. See Table Section 2-4 for a description of Memory Shadow parameters. CAUTION: Incorrect settings can cause the sys- tem to malfunction. Table Section 2-4 Memory Shadow Parameters Parameter Options...
Page 61: Numlock
Setup and Operation 2-23 Table Section 2-5 Boot Parameters Parameters Options Description Floppy check Enabled (default) Seeks diskette drives during bootup. Disabling Disabled speeds boot time. Summary screen Enabled (default) Describes system configuration at the end of Disabled bootup. Last Boot Fail 3 (default) Sets number of times the system can attempt to User selectable...
Page 62: Advanced Menu
2-24 Setup and Operation Advanced Menu Accessing the Advanced menu might require a Supervisor password. Selecting “Advanced” from the menu bar on the Main Menu displays a menu with the following options: Integrated Peripherals Parity Large Disk Access Mode. The following sections describe Advanced menu options. CAUTION: Setting items in this menu to incorrect values can cause the system to malfunction.
Page 63: Parity
Setup and Operation 2-25 Table Section 2-7 Integrated Peripherals Parameters Feature Options Description COM1 port Disabled For multimedia systems, COM2 is shipped COM2 port User-selectable disabled. settings Auto LPT port Disabled Selects a unique address and interrupt request 378, IRQ 5 (default) for the LPT port.
Page 64: Security Menu
2-26 Setup and Operation Security Menu Selecting “Security” from the Main Menu displays a menu with system security options. NOTE: Enter the Setup program with either a User or Supervisor password. However, more Setup choices are available with the Supervisor password.
Page 65: Power Menu
Setup and Operation 2-27 Table Section 2-9 System Security Options Feature Options Description Set User Password Up to seven Enter Pressing displays the dialog box for alphanumeric characters entering the user password. This password gives RESTRICTED access to Setup menus. Requires prior setting of Supervisor password.
Page 66: Exit Menu
2-28 Setup and Operation Use the legend keys to make the selections and exit to the Main Menu. Use Table Section 2-10 in making the selections. Table Section 2-10 Power Management Parameters Feature Options Description Enabled (default) Advanced power management (APM) allows APM- aware software to better manage power savings.
Page 67 Setup and Operation 2-29 Save Changes. The following sections describe each of the options on the Exit Menu. Note that does not exit this menu. Select one of the items from the menu or menu bar to exit. Save Changes & Exit After making the selections on the Setup menus, always select Save Changes to Non-Volatile RAM (NVRAM) to make them operative.
Page 68: Load Previous Values
BIOS UPDATE UTILITY The NEC Bulletin Board Service (BBS) provides information about system software and hard- ware. 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 69: System Board Jumpers
Enter Press three times. Enter At the NECTECH Main Menu, press for the file menu. Enter 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...
Page 70: Jumper Locations
2-32 Setup and Operation Jumper Locations Figure Section 2-13 shows the location of the system board's jumpers. Figure Section 2-13 Locating system configuration jumpers The factory settings of the jumpers are in the following figures. Functions of each position are also provided.
Page 71: Simm Type Jumper Jp1
Setup and Operation 2-33 In the 16-MB configuration (multimedia), two 8-MB double-sided SIMMs are installed in bank 0. The default setting in the 16-MB configuration has pins 1 and 2 shorted. Pins 1 and 2 must be shorted when the following SIMMs are installed in bank 0. 2-MB SIMMs 8-MB SIMMs 32-MB SIMMs...
Page 72: Bus Speed Jumper Jp10
2-34 Setup and Operation Jumper J10 is used to set the bus frequency. This jumper is not installed in all configurations. Figure Section 2-16 Bus speed jumper JP10 Jumper JP12 is used to set the voltage used by the processor. This is set at the factory and should not be changed.
Page 73: Changing Jumper Settings
Setup and Operation 2-35 Changing Jumper Settings To change system board jumper settings, use the following procedure. A label showing the jumper information is inside the system unit cover. The label provides a quick reference for the settings. Turn off and unplug the system and any external options. WARNING: The system power must be off be- fore changing a jumper setting.
Page 74: Section 3 Options
Section 3 Options This section provides instructions for installing an optional processor, SIMM memory, video DRAM module, 5 1/4-inch storage devices, and an internal 3 1/2-inch hard disk drive. All op- tions require that the system unit top cover be removed. INTERNAL OPTIONS When disassembling the system unit for option installation, follow these general rules.
Page 75: 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 at- tached to the system unit. Remove the two cover screws shown in Figure Section 3-1. Figure Section 3-1 Desktop Cover Screws Slide the top cover toward the rear about one inch (see Figure Section 3-2).
Page 76: Minitower Top Cover Removal
Options Minitower Top Cover Removal Remove the minitower top cover as follows. Power off and unplug the keyboard, mouse, power cord and all other peripheral cables attached to the system unit. Remove the four cover screws shown in Figure Section 3-3. Figure Section 3-3 Minitower Cover Screws...
Page 77: Expansion Board(S)
Options Slide the top cover toward the rear about one inch (see Figure Section 3-4). Lift the top cover up and off the system unit. Figure Section 3-4 Removing the Minitower Cover Expansion Board(s) The desktop system has four 8/16/32-bit expansion slots on the rear of the system and five ex- pansion board connectors on the ISA/PCI backboard.
Page 78: 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. Locate the expansion slot for board insertion (see Figure Section 3-5). Remove the slot screw and cover. Save the slot cover for use if the board is removed in the future. To remove the inside expansion slot cover for access to the connector on the back- board, remove the backside expansion slot screws shown in Figure Section 3-6.
Page 79 Options Figure Section 3-6 Inside Expansion Slot Screw 3. When removing an expansion slot cover from the inside, separate the inside 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. Slot Cover Screw...
Page 80: Minitower Expansion Board Installation
Options Install the expansion board into an expansion slot connector (and guide rail if installing a full-size board). If installing a PCI board in the shared slot, install the board component side down in the top PCI connector. If installing an ISA board in the shared slot, install the board component side up in the ISA connector under the PCI connec- tor.
Page 81: Expansion Board Troubleshooting
Options Install the expansion board into an expansion slot connector (and the guide rail if install- ing a full-size expansion board). If installing a PCI board in the shared slot, install the board component side down in the top PCI connector. If installing an ISA board in the shared slot, install the board component side up in the ISA connector under the PCI connector.
Page 82 Options Table Section 3-1 Expansion Board Problems and Solutions Problem Symptom Solution No power Power lamp on computer 1. Check that the power cord is plugged into the status panel will not light. AC connector on the computer. Check that the other end of the cord is plugged into a live properly grounded AC power outlet.
Page 83: System Board Options
CAUTION: Heat sinks are required for processors installed in the system. Heat sinks are available through NEC. Install an OverDrive processor into the system board as follows. Remove the top cover and any expansion boards obstructing access to the processor socket.
Page 84 Options 3-11 Figure Section 3-9 Locating the Processor Socket Figure Section 3-10 Removing the Heat Sink and Processor...
Page 85 3-12 Options 3. Install the processor in the socket as follows. Align the processor with the socket (see Figure Section 3-11). CAUTION: Incorrect alignment of the processor in the socket can damage the processor and system board. After installing the processor, check that the proces- sor’s speed and voltage jumpers on the system board are set correctly for the processor (see Sec- tion 2, Setup and Operation).
Page 86: Overdrive Processor Troubleshooting
Options 3-13 Replace any removed expansion boards, reconnect any cables, and reinstall the system top cover. OverDrive Processor Troubleshooting If a fault occurs at power-on, verify that the installation was performed correctly. One beep indi- cates that the computer has completed its power-on self-test. If intermittent beeping occurs, turn off the computer and try again.
Page 87: Simm Memory Installation
3-14 Options SIMM Memory Installation The system board comes standard with 8 MB of 32-bit (non-parity) memory for non-multimedia configurations and 16 MB of 32-bit memory for multimedia configurations. Memory can be ex- panded up to 128 MB. The system board also supports 36-bit (parity) SIMMs. SIMM kits are 70-ns SIMMs.
Page 88 Options 3-15 64 MB SIMMs For multimedia systems with the 16-MB configuration, pins 1 and 2 on JP1 are shorted. Also, pins 1 and 2 must be shorted if installing the following SIMMs in sockets 1 and 2 (bank 0): 2 MB SIMMs 8 MB SIMMs 32 MB SIMMs...
Page 89: Simm Installation
3-16 Options Table Section 3-4 Double-Sided SIMM Upgrade Path Total Memory Bank 0 Bank 1 * Standard on 16-MB configurations (multimedia) SIMM Installation Install SIMM sticks into the system board as follows. Remove the top cover and any expansion boards covering the socket. Locate the SIMM sockets on the system board (see Figure Section 3-12).
Page 90: Simm Installation
Options 3-17 1 of 2 Clips Figure Section 3-13 SIMM Installation Repeat step 3 for each SIMM to be installed. Replace any removed expansion boards. Replace the top cover and run Setup to check that the system accepted the SIMM up- grade (see Section 2, Setup and Operation).
Page 91: Simm Upgrade Kit Troubleshooting
3-18 Options SIMM Upgrade Kit Troubleshooting If a fault occurs at power-on, verify that the reassembly was performed correctly. One beep indi- cates that the computer has completed its power-on self-test. If intermittent beeping occurs, turn off the computer and try again. If the beeping persists, see Section 4, Maintenance and Troubleshooting.
Page 92: Video Dram Module Installation
Options 3-19 Video DRAM Module Installation The system board comes standard with 1 MB of video DRAM integrated into the system board. The optional 1 MB video DRAM kit consists of two 256K x 16-bit (512 KB) modules. The optional video DRAM is installed into the video DRAM sockets on the system board (see Figure Section 3-14).
Page 93: Video Dram Module Installation
3-20 Options Align the alignment dot end of the video DRAM module with the notched end of the socket (see Figure Section 3-15) and insert the module into the socket. Repeat step 3 to insert the second module. Figure Section 3-15 Video DRAM Module Installation Replace any removed expansion boards.
Page 94: Video Dram Module Troubleshooting
Options 3-21 Video DRAM Module Troubleshooting If a fault occurs at power-on, verify that the reassembly was performed correctly. One beep indi- cates that the computer has completed its power-on self-test. If intermittent beeping occurs, turn off the computer and try again. If the beeping persists, see Section 4, Maintenance and Trouble- shooting.
Page 95: Optional Storage Devices
OPTIONAL STORAGE DEVICES This subsection includes procedures for installing optional 5 1/4-inch and 3 1/2-inch storage de- vices in the system unit. The optional NEC diskette and hard disk drives are described first, then procedures for installing the devices follow.
Page 96: Hard Disk Drives
Options 3-23 Figure Section 3-17 FD-55GFR, 1.2-MB Diskette Drive Hard Disk Drives All hard disk systems ship with an IDE interface cable connected to the primary IDE/PCI connector on the system board and to the hard disk drive. The cable has two connectors for con- necting up to two devices (standard hard disk and an optional device).
Page 97: Wdac2540 540-Mb Hard Disk Drive
Signal Connector Front of Drive (Dual Drives) Figure Section 3-18 WDAC2540 540-MB Hard Disk Drive NOTE: All NEC hard disk drives are shipped with the jumpers set for master, one drive installed. Drive 1 and Drive 2 Master (factory setting) Drive 2 Slave Figure Section 3-19 CFA1275 1.275-GB Hard Disk Drive...
Page 98: Desktop Optional Storage Device Installation
Options 3-25 DESKTOP OPTIONAL STORAGE DEVICE INSTALLATION To install a 5 1/4-inch device or a 3 1/2-inch device ( 5 1/4-inch form factor) in the desktop sys- tem, the top cover, 3 1/2-inch drive bracket, and blank front panel must first be removed. If the device comes with attached rails, they must be removed and the screws reused to secure the drives to the drive bracket.
Page 99: Desktop Blank Panel Removal
3-26 Options Desktop Blank Panel Removal Remove the blank panel from the desktop chassis as follows. Remove the desktop cover and 3 1/2-inch diskette drive bracket as previously described. Unplug the following cables from their connectors. Power lamp Hard disk drive busy lamp Suspend button Remove the five front panel screws (see Figure Section 3-21).
Page 100: Desktop Device Installation
Options 3-27 From the inside of the front panel, release the blank panel tabs and remove the blank panel from the front panel (see Figure Section 3-22). Figure Section 3-22 Blank Panel Removal NOTE: The system unit chassis may also require a slot cover punch-out to be removed.
Page 101: Desktop 5 1/4-Inch Diskette Drive Cabling
3-28 Options Install the four device screws that were removed with the rails or that come with the kit, two on each side of the device cage (see Figure Section 3-23). Figure Section 3-23 Desktop 5 1/4-Inch Device Screws Cable the desktop 5 1/4-inch device as described next. Desktop 5 1/4-Inch Diskette Drive Cabling Cable an optional 5 1/4-inch diskette drive as follows.
Page 102: Desktop 5 1/4-Inch Hard Disk Drive Cabling
Options 3-29 Locate the power connector coming from the power supply and plug the correct fitting power cable into the device power connector (see Figure Section 3-24). Figure Section 3-24 Desktop 5 1/4-Inch Diskette Drive Cables Desktop 5 1/4-Inch Hard Disk Drive Cabling Cable the hard disk drive per the following steps.
Page 103: Completing Desktop Device Installation
3-30 Options Locate one of the larger power connectors coming from the power supply and plug it into the hard disk drive power connector (see Figure Section 3-25). Figure Section 3-25 Desktop 5 1/4-Inch Hard Disk Drive Cables Completing Desktop Device Installation Replace the assemblies removed earlier and reconfigure the system as follows.
Page 104: Minitower 5 1/4-Inch Optional Device Installation
Options 3-31 MINITOWER 5 1/4-INCH OPTIONAL DEVICE INSTALLATION To install a 5 1/4-inch device into the minitower system, the top cover, front panel, and 5 1/4-inch blank panel must first be removed. When device option kits come with rails preat- tached, remove the drive rails and reuse the screws to secure the drives to the drive bracket.
Page 105: Minitower Blank Panel Removal
3-32 Options Remove the blank panel from the metal cover plate by pressing in on the panel tabs (see Figure Section 3-27). Remove the two screws holding each metal plate cover plate to the device bracket. Remove the plates. Figure Section 3-27 Minitower Blank Panel Removal...
Page 106: Device Cage Removal
Options 3-33 Remove the five screws holding the 5 1/4-inch device cage to the chassis (see Figure Section 3-28). Figure Section 3-28 Device Cage Removal...
Page 107: Minitower 5 1/4-Inch Device Screws
3-34 Options Minitower 5 1/4-Inch Optional Device Installation Install the device into the 5 1/4-inch device slot as follows. Remove the top cover, front panel, blank panel, and device cage as previously described. NOTE: When installing 3 1/2-inch hard disk drives, a 5 1/4-inch hard disk bracket must first be attached to the 3 1/2-inch hard disk drives.
Page 108: Minitower 5 1/4-Inch Diskette Drive Cabling
Options 3-35 Minitower 5 1/4-Inch Diskette Drive Cabling Cable an optional 5 1/4-inch diskette drive as follows. Adding a second diskette drive requires an optional three-connector signal cable (part number 158-050561-000). Unplug and remove the two-connector signal cable from the installed diskette drive and the diskette connector on the system board.
Page 109: Minitower 5 1/4-Inch Hard Disk Drive Cabling
3-36 Options Minitower 5 1/4-Inch Hard Disk Drive Cabling Cable the hard disk drive per the following steps. Locate the IDE hard disk signal cable (connected to the 3 1/2-inch hard disk drive) and plug the middle connector into the signal connector on the hard disk drive in the 5 1/4-inch slot (see Figure Section 3-31).
Page 110: Completing Minitower 5 1/4-Inch Device Installation
Options 3-37 Completing Minitower 5 1/4-Inch Device Installation Replace the assemblies removed earlier and reconfigure the system as follows. Reinstall the 5 1/4-inch drive cage by reversing the steps of the “3 1/2-inch Drive Bracket Removal” procedure given earlier. Replace the top cover and run Setup to reconfigure the computer for the hard disk drive (see Section 2, Setup and Operation).
Page 111: Installing Optional 3 1/2-Inch Hard Disk Drive
3-38 Options Locate the area at the top of the chassis where the hard disk is to be installed (see Figure Section 3-32). Figure Section 3-32 Installing Optional 3 1/2-Inch Hard Disk Drive Hold the hard drive up against the chassis and align the mounting holes in the top of the hard drive with the mounting holes in the chassis.
Page 112: Hard Disk Drive Troubleshooting
Options 3-39 HARD DISK DRIVE TROUBLESHOOTING One beep indicates that the computer has completed its power-on self-test. If intermittent beeping occurs, turn off the computer and try again. If the beeping persists, see Section 4 “Maintenance and Troubleshooting.” Table Section 3-7 summarizes problems that may develop after installing a hard disk drive and lists in sequential order suggested corrective actions.
Page 113 3-40 Options Table Section 3-7 Optional 5 1/4-Inch Device Problems and Solutions Problem Symptom Solution Hard disk Hard disk drive lamp does 1. Check cable connections between the malfunction not light but hard disk drive indicator panel and system board. can be accessed.
Page 114: Section 4 Maintenance And Troubleshooting
Section 4 Maintenance and Troubleshooting This section provides information on maintaining and troubleshooting PowerMate VP series com- puters. NEC service and information telephone numbers are listed in Table Section 4-1. Table Section 4-1 NEC Service and Information Telephone Numbers Service...
Page 115: 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 lubrication is required.
Page 116: Keyboard
Maintenance and Troubleshooting Keyboard When necessary, inspect and clean the inside of the keyboard. Proceed as follows: Remove the six screws holding the keyboard enclosure together (see Figure Section 4- NOTE: The keyboard and cable together are con- sidered a whole-unit, field-replaceable assembly. Therefore, disassembly of the keyboard is necessary only when cleaning the inside.
Page 117: 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. Unplug the mouse from the system unit.
Page 118: Troubleshooting
A. Jumper settings are explained in Section 2. Error Messages Messages may appear when running NEC utilities. Table Section 4-2 describes possible system error and warning messages and their meanings. Table Section 4-3 describes possible ISA NMI error messages.
Page 119 Maintenance and Troubleshooting Table Section 4-2 System Error Messages Message Description D: Drive Error Hard disk drive D does not respond. Run the Setup to correct this problem. Also, check the D hard disk drive type in Setup to make sure the hard disk drive type is correct. D: Drive Failure Hard disk drive D does not respond.
Page 120: Diagnosing And Solving Problems
Maintenance and Troubleshooting Table Section 4-2 System Error Messages Message Description Table Section 4-3 ISA NMI Error Messages Message Description Memory Parity Error at xxxxx Memory failed. If the memory location can be determined, it is displayed as xxxxx. If not, the message is Memory Parity Error ????.
Page 121 Maintenance and Troubleshooting Table Section 4-4 Problems and Solutions Problem Symptom Solution Power supply Any one or more of the following 1. Perform steps 1 through 4 listed in this malfunction conditions could occur: table under No Power. Front panel lamps out, diskette 2.
Page 122 Maintenance and Troubleshooting Table Section 4-4 Problems and Solutions Problem Symptom Solution Diskette drive does Lamp on drive panel does not 1. Check power and signal cable not work light when diskette is loaded. connections between diskette drive, system board, and power supply. 2.
Page 123 1. Adjust the monitor's synchronization controls. 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 124: Beep Codes
Performing an update is done with a BIOS flash diskette. The diskette, which contains the latest version of the BIOS code, can be obtained from NEC Technologies. Check the NEC Bulletin Board Service (BBS) to obtain the latest version of the BIOS Update utility. How to access the...
Page 125: Nec Bulletin Board Service
4-12 Maintenance and Troubleshooting NEC Bulletin Board Service To log onto the NEC BBS, follow these steps: NOTE: First time users must answer a new user questionnaire. From the Windows Program Manager, select Accessories and double click on Terminal. From the Settings menu, select Communications and check that the settings match the...
Page 126: Using The Bios Update Utility
Maintenance and Troubleshooting 4-13 To hang up and log off, follow these steps at the NEC Technologies Bulletin Board: Press (to continue). Enter Press (command for Good-bye/Hang-up). Press Enter Using the BIOS Update Utility Update the BIOS from the BIOS flash diskette as follows.
Page 127: 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 (multimedia configurations), hard disk drive (hard drive configurations), and 3 1/2- inch diskette drive (all configurations) are included in these disassembly procedures.
Page 128 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 129: Top Cover Removal
Desktop Repair Top Cover Removal Remove the top cover as follows. NOTE: Unplug the power cord before disassembling 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 un- plugged.
Page 130: Expansion Board Removal
Desktop Repair Slide the top cover toward the back about one inch. Lift the top cover up and off (see Figure Section 5-2). Figure Section 5-2 Removing the Top Cover Expansion Board Removal Remove any installed expansion board(s) per the following steps. Remove the top cover as previously described.
Page 131: Inside Expansion Slot Screw
Desktop Repair Figure Section 5-3 Expansion Slot Screw Figure Section 5-4 Inside Expansion Slot Screw Remove the board from the expansion slot.
Page 132: Removing The Expansion Slot L-Bracket
Desktop Repair When removing an expansion board from the backside of the PCI/ISA-Bus back- board, separate the inside expansion slot L-bracket from the expansion board by re- moving the screw shown in Figure Section 5-5. Expansion Board Bracket Screw L-Bracket Figure Section 5-5 Removing the Expansion Slot L-Bracket...
Page 133: Isa/Pci-Bus Backboard Removal
Desktop Repair ISA/PCI-BUS Backboard Removal Remove the ISA/PCI-Bus backboard from the system unit as follows. Remove the top cover and all expansion boards as previously described. Remove the two backboard screws (see Figure Section 5-6). Lift the backboard away from the bracket and out of the system unit. Bracket ISA/PCI-Bus Backboard...
Page 134: 1/2-Inch Diskette And Hard Disk Drive Removal
Desktop Repair 3 1/2-inch Diskette and Hard Disk Drive Removal Remove the 3 1/2-inch diskette drive and 3 1/2-inch hard disk drive as follows. Remove the top cover as previously described. Unplug the diskette drive power cable and signal cable from the diskette drive (see Figure Section 5-7).
Page 135: Inch Diskette And Hard Disk Drive Screws
Desktop Repair Remove the four 3 1/2-inch diskette drive screws, two on each side of the drive bracket (see Figure Section 5-8). Remove the two 3 1/2-inch hard disk drive screws, two on each side of the drive bracket (see Figure Section 5-8). Pull the drives out from the front of the bracket.
Page 136: Front Panel Assembly Removal
5-10 Desktop Repair Front Panel Assembly Removal Remove the front panel assembly from the system unit as follows. Remove the top cover and 3 1/2-inch drive bracket as previously described. Unplug the following cables from their connectors (see Figure Section 5-9). Power lamp (connector J16) Hard disk drive busy lamp (connector J14) Suspend button (connector J11)
Page 137: Power Button Cover Removal
Desktop Repair 5-11 Power Button Cover Removal Remove the power button cover from the front panel as follows. 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 138: Speaker Assembly Removal
5-12 Desktop Repair Speaker Assembly Removal Remove the speaker from the device cage as follows. 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 (see Figure Section 5-11). Lift the speaker from the slot in the device cage.
Page 139: Simm Removal
Desktop Repair 5-13 SIMM Removal Remove SIMM sticks from the system board as follows. Remove the top cover, and any full size expansion boards as previously described. Open the two clips at each end of the SIMM connector (see Figure Section 5-12). Tilt the SIMM stick forward, so that the SIMM can be removed from the socket.
Page 140: Optional 5 1/4-Inch Device Removal
5-14 Desktop Repair Optional 5 1/4-Inch Device Removal Remove an optional 5 1/4-inch device from the 5 1/4-inch device cage per Figure Section 5-13, and the following steps. Remove the top cover, front panel, and 3 1/2-inch drive bracket as previously described.
Page 141: 1/4-Inch Device Cage Removal
Desktop Repair 5-15 5 1/4-Inch Device Cage Removal Remove the 5 1/4-inch device cage from the system unit as follows. NOTE: Devices housed inside the device cage can be removed from the device cage without removing the device cage. See the preceding procedure. Remove the device cage only when completely dis- assembling the system unit.
Page 142: Power Supply Removal
5-16 Desktop Repair Power Supply Removal Remove the power supply from the system unit as follows. Remove the top cover and front panel as previously described. Unplug the power cable attached to the system board's connector. Unplug the power cables from all installed devices. Remove the two screws securing the power button to the front of the system unit (see Figure Section 5-15).
Page 143: Power Supply Screws
Desktop Repair 5-17 Remove the four screws holding the power supply to the system unit (see Figure Section 5-16). 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...
Page 144: System Board Removal
5-18 Desktop Repair System Board Removal Remove the system board per the following steps. Remove the following components as previously described: top cover expansion boards ISA/PCI-bus backboard 3 1/2-inch drive bracket SIMMs installed on the system board. NOTE: If installed, remove the optional video DRAM module (see Section 3, Options).
Page 145: Illustrated Parts Breakdown
5-19 Illustrated Parts Breakdown This subsection contains the illustrated parts breakdown (IPB) and NEC part numbers for the PowerMate VP series desktop computer. Table Section 5-2 lists the field-replaceable parts for the computer. Figure Section 5-17 is the illustrated parts breakdown.
Page 146 158-050685-007 5 1/4-inch Blank Panel 158-050685-010 Keyboard 158-050707-000 Power Cord 808-857649-101A NEC Mouse (PS/2-compatible) 158-050484-002 ____________ * 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 42181170.
Page 147 Desktop Repair 5-21...
Page 148: Powermate Vp Series Desktop Options*
819-181146-000 PowerMate VP Series Service and Reference Manual 819-181170-000 PowerMate VP Series Service Video Training Kit 158-056099-026 NEC Multimedia Series Ensemble Software User's Guide 819-181124-000 PowerMate VP Series Desktop Shipping Carton 158-040442-007 PowerMate VP Series Desktop Multimedia Shipping Carton 158-040490-001...
Page 149: Disassembly And Reassembly
Section 6 Minitower Repair DISASSEMBLY AND REASSEMBLY This section contains step-by-step disassembly procedures for the minitower systems. The CD-ROM reader (multimedia configurations), hard disk drive (hard drive configurations), and 3 1/2-inch diskette drive (all configurations) are included in these disassembly procedures.
Page 150 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 151: Top Cover Removal
Minitower Repair Top Cover Removal Remove the top cover as follows. NOTE: Unplug the power cord before disassembling the system unit. Voltage is present inside the system unit even after the power is off. All voltage is removed only when the power cord is unplugged.
Page 152: Removing The Top Cover
Minitower Repair Slide the top cover toward the rear about one inch (see Figure Section 6-2). Lift the top cover up and off the system unit. Figure Section 6-2 Removing the Top Cover...
Page 153: Bottom Access Cover Removal
Minitower Repair Bottom Access Cover Removal Remove the bottom access cover from the system unit as follows. Power off and unplug the keyboard, mouse, power cord, and all other peripheral cables attached to the system unit. Place the system unit on its right side. Remove the access cover screw as shown in Figure Section 6-3.
Page 154: Expansion Board Removal
Minitower Repair Expansion Board Removal Remove the sound board (multimedia configurations), network board (network configura- tions), or any other installed expansion board(s) per the following steps. Remove the top cover and bottom access cover as previously described. Disconnect any cables leading from the expansion board(s). The sound board has an audio cable and signal cable attached.
Page 155: Front Panel Assembly Removal
Minitower Repair Front Panel Assembly Removal Remove the front panel assembly from the chassis as follows. Remove the top cover as previously described. Remove the four screws (two on each side) holding the front panel to the system unit (see Figure Section 6-5). Figure Section 6-5 Front Panel Screws...
Page 156: Power Button Cover Removal
Minitower Repair Power Button Cover Removal Remove the power button cover from the front panel as follows. Remove the top cover and front panel as previously described. Release the four power button tabs from the inside of the front panel and push the tabs through the front panel (see Figure Section 6-6).
Page 157: Blank Panel And Metal Cover Plate Removal
Minitower Repair Blank Panel and Metal Cover Plate Removal Remove the blank panels and the metal cover plates from the chassis as follows. Remove the top cover and front panel as previously described. Release the blank panel tabs and remove the blank panel from the metal cover plate (see Figure Section 6-7.
Page 158: Speaker Assembly Removal
6-10 Minitower Repair Speaker Assembly Removal Remove the speaker per Figure Section 6-8 and the following steps. Remove the top cover as previously described. Unplug the speaker from 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 159: Simm Removal
Minitower Repair 6-11 SIMM Removal Remove any optional SIMM sticks from the system board as follows. Remove the top cover and any full size expansion boards as previously described. Open the clips at each end of the SIMM connector (see Figure Section 6-9). Tilt the SIMM forward, so that the SIMM can be removed from the socket.
Page 160: Removing The Device Cage Screws
6-12 Minitower Repair 5 1/4-Inch Device Cage Removal Remove the 5 1/4-inch device cage from the system unit as follows. Remove the top cover as previously described. Label and unplug all signal and power cables from any device(s) in the 5 1/4-inch device cage.
Page 161: 1/4-Inch Device Removal
Minitower Repair 6-13 5 1/4-Inch Device Removal Remove a 5 1/4-inch device from the 5 1/4-inch device cage as follows. Remove the top cover, front panel, and device cage as previously described. Remove the four 5 1/4-inch device screws; two on each side (see Figure Section 6-11).
Page 162: 1/2-Inch Hard Disk Drive Removal
6-14 Minitower Repair 3 1/2-inch Hard Disk Drive Removal Remove the 3 1/2-inch hard disk drive as follows. Remove the top cover as previously described. Unplug the hard disk drive power and signal cables from the hard disk drive (see Figure Section 6-12).
Page 163: Removing The 3 1/2-Inch Hard Disk Drive
Minitower Repair 6-15 Remove the four screws holding the 3 1/2-inch hard disk drive to the underside of the chassis top (see Figure Section 6-13). (Note, optional hard disk drive screws shown, standard hard drive similar.) Remove the 3 1/2-inch hard disk drive from the chassis. Figure Section 6-13 Removing the 3 1/2-Inch Hard Disk Drive...
Page 164: 1/2-Inch Diskette Drive Removal
6-16 Minitower Repair 3 1/2-inch Diskette Drive Removal Remove the 3 1/2-inch diskette drive as follows. Remove the top cover as previously described. Unplug the diskette drive power cable and signal cable from the diskette drive (see Figure Section 6-14). NOTE: When reinstalling the diskette drive, note that all power cables are keyed to fit only in the correct position.
Page 165: Diskette Drive Bracket Screws
Minitower Repair 6-17 3. Remove the three 3 1/2-inch diskette drive bracket screws shown in Figure Sec- tion 6-15. 3 1/2-Inch Diskette Drive Bracket Screws Figure Section 6-15 Diskette Drive Bracket Screws...
Page 166: Diskette Drive Screws
6-18 Minitower Repair Slide the 3 1/2-inch diskette drive with bracket out of the system unit. Remove the four 3 1/2-inch diskette drive screws, two to a side (see Figure Sec- tion 6-16). Remove the drive from the bracket. 3 1/2-Inch Diskette Drive Bracket 2 of 4 Screws...
Page 167: Power Button Screws
Minitower Repair 6-19 Power Supply Removal Remove the power supply as follows. 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 (see Figure Section 6-17).
Page 168: Power Supply Screws
6-20 Minitower Repair Remove the four screws securing the power supply to the system (see Figure Section 6-18). Slide the power supply toward the front of the system unit to release the two tabs at the top of the chassis. Remove the power supply from the system unit. Tabs Screws Power...
Page 169: Pci/Isa Backboard Removal
Minitower Repair 6-21 PCI/ISA Backboard Removal Remove the PCI/ISA backboard as follows. Remove the top cover and all expansion boards as previously described. Remove the two backboard bracket screws (see Figure Section 6-19). Pull the backboard and bracket out of the system unit. Bracket Screw (not shown) Chassis Support...
Page 170: System Board Removal
6-22 Minitower Repair System Board Removal Remove the system board per the following steps. Remove the following components as previously described: top cover expansion slot boards PCI/ISA backboard 3 1/2-inch drive cage 3 1/2-inch diskette drive bracket SIMMs installed on the system board optional video DRAM module if installed.
Page 171: Powermate Vp Minitower Field-Replaceable Parts List
6-23 Illustrated Parts Breakdown This subsection contains the illustrated parts breakdown (IPB) and NEC part numbers for the PowerMate VP minitower computer, including part numbers for the multimedia and network components. Table Section 6-2 lists the field-replaceable parts for the computer.
Page 172 808-870954-101A 5 1/4-Inch Device Cage 158-050705-013 3 1/2-Inch Diskette Drive Cage 158-050705-009 Fan Cover/Card Guide 158-050705-015 Power Button Cover and Spring 158-050698-008 PowerMate VP75 Logo 158-030597-008 Front Panel Bezel 158-030596-001 Fan Assembly and Extender Cable 158-050823-000 Speaker Assembly 158-050705-005 Keyboard 158-050707-000 †...
Page 173 Minitower Repair 6-25...
Page 174: Powermate Vp75 Series Minitower Illustrated Parts Breakdown*
6-26 Minitower Repair Figure Section 6-20 PowerMate VP75 Series 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 42181170.
Page 175: Powermate Vp Series Minitower Options
PowerMate VP Series User's Guide 819-181129-000 PowerMate VP Series Service and Reference Manual 819-181170-000 PowerMate VP Series Service Video Training Kit 158-056099-026 NEC Multimedia Series Ensemble Software User’s Guide 819-181124-000 PowerMate Minitower Series Shipping Carton 158-040455-012 PowerMate Minitower Multimedia Series Shipping Carton 158-040492-000...
Page 176: Appendix A Connector Pin Assignments
Appendix A Connector Pin Assignments This appendix describes the system board connector pin assignments. Figure Appendix A-1 shows the locations of the system board connectors. Table Appendix A-1 identifies the connector function with the connector number. Descriptions of the connectors are provided in the following subsections.
Page 177: A-1 System Board Connector Descriptions
Connector Pin Assignments Table Appendix A-1 System Board Connector Descriptions Function Connector Number Type Monitor (VGA interface) 15 pin female sub D-shell Parallel interface 25 pin female sub D-shell Serial interface COM1/COM2 J3, J10 9 pin D-shell Mouse 6-pin PS/2 style connector Keyboard 6-pin PS/2 style connector Power supply...
Page 178: Serial Interface Connectors
Connector Pin Assignments Serial Interface Connectors Serial interface signals are output from the system board through two 9-pin COM port connectors. The 9-pin, D-subconnectors are located at the rear of the system unit. Pin locations and pin assignments for the two serial interface connectors are shown in Figure Appendix A-2.
Page 179: Parallel Interface Connector
Connector Pin Assignments Parallel Interface Connector The system has a 25-pin parallel port on the system board. Parallel interface specifications for this port conform to the IBM-PC interface. Pin locations and pin assignments for the parallel interface connector are shown in Figure Appendix A-3. Figure Appendix A-3 Parallel Interface (J15)
Page 180: Vga Interface Connector Pin Assignments
Connector Pin Assignments VGA Interface Connector Pin Assignments Video signals are output from the system board through a VGA interface connector, which is a 15-pin, D-subconnector (VESA VS890803-2) located at the rear of the system unit. Table Ap- pendix A-2 shows the connector pin locations and pin assignments. Table Appendix A-2 Video Connector (J20) Pin Assignments Signal...
Page 181: Power Supply Connector
Connector Pin Assignments Power Supply Connector Voltages from the power supply are input to the system board through the power supply connec- tor. Figure Appendix A-4 shows the connector pin locations and pin assignments. Power Good Signal Figure Appendix A-4 Power Supply Connector (J8) Pin Assignments Keyboard and Mouse Connectors The keyboard and mouse use standard PS/2 connectors.
Page 182: Power Lamp Connector
Connector Pin Assignments Power Lamp Connector Power lamp connector pin assignments are given in Table Appendix A-5. The two-wire power lamp cable connects to a five-position connector (J16) on the system board. The cable’s green wire (1) goes to pin 1 and the black wire (2) goes to pin 3 on the five-position connector. Table Appendix A-5 Power Lamp Connector (J16) Pin Assignments Signal...
Page 183: Suspend Button Connector
Connector Pin Assignments Ground Suspend Button Connector Suspend button connector pin assignments are given in Table Appendix A-8. Table Appendix A-8 Suspend Button Connector (J11) Pin Assignments Signal Reset Ground...
Page 184: Diskette Drive Interface Pin Assignments
Connector Pin Assignments Diskette Drive Interface Pin Assignments Table Appendix A-9 provides the pin assignments for the diskette drive interface. Table Appendix A-9 Diskette Drive Connector (J5) Pin Assignments Ground Pin Signal Pin Signal Name FDHDIN — Not used — FDEDIN —...
Page 185: Ide Interface Connectors
A-10 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. The two system board IDE connectors are physically identical.
Page 186: Simm Sockets
Connector Pin Assignments A-11 SIMM Sockets Table Appendix A-11 provides the SIMM socket pin assignments. Table Appendix A-11 SIMM Socket Pin Assignments Signal Signal Signal RAS2 CAS0* CAS2* CAS3* CAS1* PD0 (N/C) RAS0 PD1 (N/C) PD2 N/C PD3 N/C...
Page 187: Isa/Pci-Bus Backboard Connector Pin Assignments
A-12 Connector Pin Assignments ISA/PCI-Bus Backboard Connector Pin Assignments Table Appendix A-12 provides the pin assignments for the ISA/PCI-bus backboard connector on the system board. Table Appendix A-12 ISA/PCI-Bus Backboard Connector Pin Assignments Signal Signal Signal Signal IOCHCK SD07 RSET DRV SD06 –PCIINT1 –PCIINT3...
Page 188 Connector Pin Assignments A-13 Table Appendix A-12 ISA/PCI-Bus Backboard Connector Pin Assignments Signal Signal Signal Signal SA03 BALE –FRAME –IRDY SA02 –CBE2 –DEVSEL SA01 –TRDY –PLOCK SA00 –STOP –PERR SBHE MEMCS16 SDONE –SERR LAB23 I/OCS16 –SB0 AD15 LAB22 IRQ10 –CBE1 AD14 LAB21 IRQ11...
Page 189: Isa Expansion Bus Connector Pin Assignments
A-14 Connector Pin Assignments ISA Expansion Bus Connector Pin Assignments The expansion slots signals, voltages, and grounds are supplied through the bus connectors. There are no active components on the ISA/PCI-bus backboard. Table Appendix A-13 provides the pin assignments for the ISA expansion slots. Table Appendix A-13 ISA Expansion Slot Pin Assignments Direction Signal...
Page 190 Connector Pin Assignments A-15 Table Appendix A-13 ISA Expansion Slot Pin Assignments Direction Signal Direction Signal Input/Output SA04 Output Input/Output SA03 Output BALE Input/Output SA02 Power Input/Output SA01 Output Input/Output SA00 Ground Input/Output SBHE Input MEMCS16 Input/Output LAB23 Input I/OCS16 Input/Output LAB22 Input...
Page 191: Sound Board Pin Assignments
A-16 Connector Pin Assignments SOUND BOARD PIN ASSIGNMENTS The pin assignments for the sound board are provided in Table Appendix A-14 through Table Appendix A-16. Table Appendix A-14 Sound Board Signal Connector Signal Signal Ground Data Bit 0 Ground Data Bit 1 Ground Data Bit 2 Ground...
Page 192: A-15 Audio Connector
Connector Pin Assignments A-17 Table Appendix A-15 Audio Connector Signal Ground Left channel signal Ground Right channel signal Table Appendix A-16 MIDI/Joystick Connector Signal +5 Vdc Joystick 1, Fire 1 Joystick 1, X Ground Ground Joystick 1, Y Joystick 1, Fire 2 +5 Vdc +5 Vdc Joystick 2, Fire 1...
Page 193: Appendix B Specifications
Appendix B Specifications This section provides the specifications for the system unit, power supply, diskette drives, and hard disk drives. SYSTEM UNIT SPECIFICATIONS Table Appendix B -1 lists system unit specifications. Table Appendix B -1 System Unit Specifications Item Specification Desktop Dimensions Width: 16.9 inches (42.9 cm) Depth: 16.2 inches (41.2 cm)
Page 194 Specifications Table Appendix B -1 System Unit Specifications Item Specification Peripheral Interface PS/2-style keyboard connector, rear panel PS/2-style mouse connector, rear panel Two RS-232C serial ports, rear panel Parallel printer port, rear panel VGA port, rear panel Front Panel Power button Power indicator lamp Hard disk drive busy indicator lamp Suspend button...
Page 195: Power Supply Specifications
Specifications Table Appendix B -1 System Unit Specifications Item Specification Sound Board Creative Labs 16-bit audio board with a Panasonic/Creative CD- ROM interface. Fully Adlib and Sound Blaster Compatible. Speakers 3-inch stereo speakers – Bass and treble boost controls – Built-in power booster –...
Page 196: Diskette Drive Specifications
Specifications Input voltage 90V - 135V ~ 5.0A 100 ~ 120V 8.0A 180V - 265V ~ 3.0A 200 ~ 240V 5.0A Table Appendix B -3 lists the output power specifications for the power supply. Table Appendix B -3 Power Supply Output Specifications 145 W 200 W +5V, 18A Max...
Page 197 Specifications Table Appendix B -4 Specifications for Diskette Drives Features OSDA-90C 1.44-MB FD-55GFR 1.2 MB Weight 1.0 lb (0.63 kg) 1.5 lb (0.67 kg) Operating Temperature 41° to 113°F (5° to 45°C) 39° to 115°F (4° to 46°C) Relative Humidity 20% to 80% 20% to 80% Tolerance Range...
Page 198: Hard Disk Specifications
Specifications HARD DISK SPECIFICATIONS Specifications for the hard disk drives are given in Table Appendix B -5. Table Appendix B -5 Specifications for 540-MB and 1.275-GB Hard Disk Drives Features 540-MB 1.275-GB Physical Configuration Formatted Capacity 540 MB 1278 MB Actuator Type Rotary Rotary...
Page 199: Appendix C Cd-Rom Reader Configuration
Appendix C CD-ROM Reader Configuration This appendix provides connector and jumper setting information for the quadruple speed CD- ROM reader. Use this information for removing, reconfiguring, or reinstalling the CD-ROM reader. The rear panel of the quadruple speed CD-ROM reader provides the connectors and jumpers for cabling and configuring the reader.
Page 200 CD-ROM Reader Configuration Use the following jumper setting information to set the quadruple speed CD-ROM reader to a Master or Slave configuration. NOTE: The quadruple speed CD-ROM reader jumpers are set correctly at the factory. Figure Appendix C -2 Quadruple Speed Reader Jumper Settings...
Page 201: Appendix D Sound Board Configuration
Appendix D Sound Board Configuration This appendix provides the configuration settings for the sound board. The factory default settings for the sound board are as follows: MIDI Interface Base I/O Address: 330H Audio Interface Base I/O Address: 220H Joystick Connector: Enabled Interrupt: IRQ 7 Low DMA channel: 1...
Page 202: D-1 Jumpers On The Sound Board
Sound Board Configuration Figure Appendix D-1 Jumpers on the Sound Board To change the configuration of jumpers: Power off the computer and all other peripheral devices. Remove the system’s cover and board from your system. Identify the jumpers to change. Select the settings for the board by placing the jumper blocks on the desired jumpers.
Page 203: Midi Base I/O Address
Sound Board Configuration MIDI Base I/O Address The base I/O address for the MPU-401 UART MIDI on the sound board can be changed using jumper MSEL. Two base I/O addresses, 300H and 330H (factory default settings), are avail- able. To change the base I/O address, enable the jumper corresponding to the setting shown in Figure Appendix D-2.
Page 204: Audio Interface Dma Channel
Sound Board Configuration Audio Interface DMA Channel The audio interface supports both low and high DMA channels for direct data transfer to the sys- tem’s memory. Low DMA channels 0, 1 (factory default setting), and 3 are used to transfer 8-bit data.
Page 205: D-5 High Dma Channel Settings
Sound Board Configuration High DMA channels 5 (factory default setting), 6, and 7 are used to transfer 16-bit data. The high DMA channel setting can be changed using jumpers DBS0 and DBS1, as shown in Figure Ap- pendix D-5. Figure Appendix D-5 High DMA Channel Settings...
Page 206: Audio Interface Base I/O Address
Sound Board Configuration Audio Interface Base I/O Address Four base I/O addresses are available for the audio interface: 220H (factory default setting), 240H, 260H, and 280H. To change the base I/O address, enable the jumpers corresponding to the settings shown in Figure Appendix D-6. Figure Appendix D-6 Base I/O Address Settings for the Audio Interface...
Page 207: Audio Interface Irq Line
Sound Board Configuration Audio Interface IRQ Line Four IRQ lines are available for the audio interface: IRQ 2, 5, 7 (factory default setting), and 10. The IRQ line setting can be changed using jumpers IS0 and IS1. To change the IRQ line, enable the jumpers corresponding to the setting shown in Figure Appendix D-7.
Page 208: Midi Interface
Sound Board Configuration MIDI Interface A jumper is available on the sound board to enable its MPU-401 UART MIDI Interface. The default setting of this jumper MPUEN is enabled (see Figure Appendix D-8). Remove the jumper block if it is necessary to disable the interface. Figure Appendix D-8 MPU-401 UART MIDI Settings...
Page 209 (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 210: Battery Replacement
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 Chapter 9 for battery replacement information. WARNING: There is a danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer.

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Vp75d Vp75mt

NEC PowerMate VP75 User Manual

Section 1 Technical Information

List of Tables

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

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Summary of Contents for NEC PowerMate VP75