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 licen- sors, as appropriate, reserve all patent, copyright and other proprietary rights to this docu- ment, 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 ..........................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 ....................1-5 Flash ROM ......................1-6 Power Management ....................1-7 I/O Addressing......................1-8 System Memory......................
Page 3 Contents Field Help Window ....................2-11 General Help Window................... 2-12 Main Menu Options ....................2-12 IDE Adapters......................2-13 Memory Shadow....................2-14 Boot Sequence...................... 2-15 Numlock....................... 2-15 Advanced Menu......................2-16 Integrated Peripherals Menu.................. 2-16 Parity ........................2-17 Large Disk Access Mode ..................2-18 Security Menu ......................
Page 4 Hard Disk Drive Troubleshooting ................3-37 NEC SVGA Monitor....................3-39 Connecting the Monitor.................... 3-40 Front Control Panel ....................3-42 Rear Control Panel ....................3-43 NEC SVGA Monitor Troubleshooting..............3-44 Section 4 Maintenance and Troubleshooting Maintenance ........................4-2 System Unit........................ 4-2 Keyboard........................4-3 Mouse ........................
Page 5 viii Contents Front Panel Assembly Removal................... 5-7 Power Button Cover Removal ..................5-9 Speaker Assembly Removal ..................5-10 SIMM Removal......................5-11 3 1/2-inch Diskette and Hard Disk Drive Removal ............ 5-12 Optional 5 1/4-Inch Device Removal ................ 5-14 5 1/4-Inch Device Cage Removal................5-15 Power Supply Removal.....................
Page 6 System Unit Specifications..................... B-1 Power Supply Specifications..................B-3 Diskette Drive Specifications ..................B-4 Hard Disk Specifications....................B-5 NEC SVGA Monitor Specifications................B-6 List of Figures PowerMate Desktop System Unit Features............1-1 PowerMate Minitower System Unit Features ............1-2 Desktop Voltage Selector Switch................ 2-2 Desktop Peripheral Connections................
Page 7 Minitower 5 1/4-Inch Hard Disk Drive Cables........... 3-36 3-31 Monitor Connections ..................3-41 3-32 NEC SVGA Monitor Front Control Panel............3-42 Removing the Keyboard Enclosure..............4-3 Removing the Mouse Ball Cover................. 4-4 Top Cover Screws ....................5-3 Removing the Top Cover ..................5-4 Expansion Slot Screw ..................
Page 8 Contents Speaker Tabs ...................... 6-9 SIMM Socket ....................6-10 6-10 3 1/2-Inch Diskette Drive Cables............... 6-11 6-11 Diskette Drive Bracket Screws................6-12 6-12 3 1/2-Inch Hard Disk Drive Cables..............6-13 6-13 Right Side Device Screws ................. 6-14 6-14 Left Side Device Screw Access Holes ............... 6-15 6-15 5 1/4-Inch Device Cage Screws.................
Page 9 Video Cache RAM Chip Problems and Solutions ..........3-22 Optional 5 1/4-Inch Device Problems and Solutions .......... 3-38 NEC SVGA Monitor Problems and Solutions ........... 3-44 NEC Service and Information Telephone Numbers..........4-1 BIOS Update Utility Error Messages ..............4-5 Problems and Solutions ..................
Page 10 Contents xiii...
Page 11: Preface
Section 4, Maintenance and Troubleshooting, includes recommended maintenance in- formation and lists possible problem and solutions for computer. Section 5, Desktop Repair, includes a list of NEC service information and telephone num- bers that provide access to the NEC Bulletin Board System (BBS), FastFacts, and Techni- cal Information Bulletins.
Page 12: Abbreviations
Abbreviations ampere DMAC DMA controller alternating current disk operating system advanced technology DRAM dynamic RAM (IBM PC) data terminal equipment Bulletin Board System error checking and correction binary-coded decimal Enhanced Graphics Adapter BIOS Customized Utility EPROM erasable and programmable BIOS basic input/output system binary digit EVGA...
Page 13 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 milliamps...
Page 14: Section 1 Technical Information
Section 1 Technical Information The PowerMate Series includes the PowerMate 433D, PowerMate 466D, Power- Mate 466M, and PowerMate 4100M. The information in this manual applies to all models except where indicated. Models differ primarily in the chassis, and microprocessor. This section provides an overview of the PowerMate Series hardware. The basic hardware for the system includes a system unit, keyboard, and mouse.
Page 15: Minitower System Unit
Technical Information MINITOWER SYSTEM UNIT The minitower chassis provides an enclosure for the system board, power supply, five stor- age device slots, and five-expansion-slot ISA/VL-Bus backboard. The storage device slots accommodate a 3 1/2-inch diskette drive, a 3 1/2-inch hard disk (1-inch height), and three 5 1/4-inch storage devices (1.6-inch height).
Page 16: System Board
Technical Information 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). Key features of the system board are listed below. processor Intel486SX™-33 –...
Page 17 Technical Information energy saving features: system switches to power save mode when idle for an es- tablished amount of time 3 1/2-inch, 1.44-MB diskette drive ISA/VL-Bus backboard providing four ISA and one ISA/VL-Bus expansion slots external connectors providing an interface for the following external devices: VGA-compatible monitor ®...
Page 18: Processor
Technical Information Processor The PowerMate systems use the following processors. PowerMate 433D – uses the 486SX with a 33 MHz clock speed PowerMate 466D and 466M – use the 486DX2 with a 66-MHz internal clock speed and a 33-MHz external clock speed. PowerMate 4100M –...
Page 19: Flash Rom
Technical Information Flash ROM Machine language programs are stored in a 28F010 Flash ROM known as the system's ROM BIOS. The system BIOS and video BIOS are contained in the ROM. The Flash ROM is 128 KB, which consists of 64 KB of system BIOS, and 32 KB of video BIOS. The Flash ROM allows the BIOS to be upgraded with the BIOS Update utility without re- moving the ROM (see Section 2, Setup and Configuration).
Page 20: Power Management
Technical Information Flash ROM supports the reprogramming of the system and built-in video BIOS. Software controls this feature via port 94h. Flash ROM programming writes to location 0F0000h- 0FFFFFh. This range allows access to 64 KB of the 128 KB ROM. To write to the rest of the ROM, bit 3 of port 94h must be set.
Page 21: I/O Addressing
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) 0A0-0BF Interrupt controller 2 0C0-0DF...
Page 22: System Memory
Technical Information Table Section 1-3 I/O Address Map Address (Hex) I/O Device Name 3D0-3DF Color/Graphics Adapter (CGA and EGA) 3F0-3F7 Diskette Controller 3F8-3FF Asynchronous Adapter Port 1 System Memory The PowerMate 433D, 466D, and 466M system boards come standard with 4 MB of RAM. The PowerMate 4100M system board comes standard with 8 MB of RAM.
Page 23: Video Controller
1-10 Technical Information The interrupt levels are described in Table Section 1-4. Interrupt-level assignments 0 through 15 are in order of decreasing priority. See Section 2, Setup and Configuration, for information on changing the interrupts using Setup and jumpers. Table Section 1-4 Interrupt Level Assignments Interrupt Priority Interrupt Device IRQ00...
Page 24 Technical Information 1-11 The 64300 video controller supports XRAM Accelerator Cache, power management, flash ROM, and a linearly mapped display. The XRAM Accelerator Cache is a breakthrough in performance technology. By using one standard 256K x 4 fast page DRAM, a proprietary algorithm implemented in the 64300 sig- nificantly increases graphics system performance.
Page 25: Video Memory
1-12 Technical Information Video Memory The 1 MB of on-board video DRAM is expandable to 2 MB and provides graphic resolu- tions of or 640 x 480 with 16.8 million colors, 800 x 600 with 64K colors, 1024 x 768 with 256 colors, or 1280 x 1024 with 16 colors.
Page 26: Graphic Modes
Technical Information 1-13 Table Section 1-6 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: Isa/Vl-Bus Backboard
1-14 Technical Information Table Section 1-6 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 charactor size...
Page 28: Parallel Interface
Technical Information 1-15 Parallel Interface The system has a 25-pin parallel port on the system board. Specifications for this port con- form 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 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 1-8. The interrupt is selectable via Setup to either IRQ3 or IRQ4.
Page 30: Power Supply
Technical Information 1-17 POWER SUPPLY The power supply is mounted inside the system unit. It supplies power to the system board, option boards, diskette drives, hard disks, keyboard, and mouse. Two connectors connect the power supply to the system board. A fan inside the power supply provides proper ven- tilation for the system.
Page 31: Section 2 Setup And Operation
Section 2 Setup and Operation This section provides information on hardware setup for PowerMate Series computers. Setup includes unpacking, cabling, and powering up the system. It also includes configuring the system with the system setup programs. Section 3 provides information for installing options.
Page 32: Desktop Voltage Selector Switch
Setup and Operation 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). At the rear of the system, set the voltage selector switch to 115V or 230V and in- sert the power cord into the system power socket (see Figure 2-1).
Page 33: Desktop Peripheral Connections
Setup and Operation Connect the keyboard and mouse cables to the back of the system unit (see Figure 2-2). Connect the, monitor and any other peripherals to the rear panel (see Figure 2-2). Detailed monitor connections a given in Sections 3, Options. 15-Pin VGA Monitor Connector...
Page 34 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 35: Minitower Setup
Setup and Operation Minitower Setup Set up the minitower systems by making the following connections. (See the preceding sub- section, 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 (see Figure 2-5).
Page 36: Minitower Peripheral Connections
Setup and Operation Connect the keyboard and mouse cables to the back of the system unit (see Figure 2-6). Connect the monitor and any other peripherals to the rear panel (see Figure 2-6). Detailed monitor connections a given in Sections 3, Options. Expansion Slot Covers 15-Pin VGA...
Page 37 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 38: System Configuration
Setup and Operation SYSTEM CONFIGURATION This subsection 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 configura- tion. Unless adding optional hardware, Setup does not need to be run.
Page 39: How To Start Setup
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 sys- tem.
Page 40: Menu Bar
2-10 Setup and Operation The legend bar — the area at the bottom of the screen. The legend bar provides a summary of command keys for using Setup. The General Help window — a window that appears any time during Setup after pressing Alt H .
Page 41: Legend Bar
Setup and Operation 2-11 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 alter- nates.
Page 42: General Help Window
2-12 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 43: Ide Adapters
Setup and Operation 2-13 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 44: Memory Shadow
2-14 Setup and Operation Table Section 2-4 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 45: Boot Sequence
Setup and Operation 2-15 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 46: Advanced Menu
2-16 Setup and Operation Table Section 2-7 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 47: Parity
Setup and Operation 2-17 NOTE: A Supervisor password might be re- quired to select parameters from the Integrated Peripherals menu. Use the legend keys to make the selections and exit to the Main Menu. Use the following table to configure the peripherals: Table Section 2-8 Integrated Peripherals Parameters Feature Options...
Page 48: Large Disk Access Mode
2-18 Setup and Operation Large Disk Access Mode Select the Large Disk Access Mode parameter when configuring a large disk (see Table Section 2-9). Use the legend keys to make the selections and exit to the Main Menu. Table Section 2-9 Large Disk Parameters Parameter Options Description...
Page 49: System Security Options
Setup and Operation 2-19 See Table Section 2-11 for a description of the security features. Use the legend keys to make the selections and exit to the Main Menu. Table Section 2-11 System Security Options Feature Options Description Supervisor Password Disabled (default) Must set to enabled to set a Supervisor password.
Page 50: Power Menu
2-20 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 51: Exit Menu
Setup and Operation 2-21 Exit Menu Selecting “Exit” from the menu bar displays the following exit options: Save values & Exit Discard values & Exit Get Default Values Load Previous Values Save Current Values. The following sections describe each of the options on the Exit Menu. Note that does not exit this menu.
Page 52: Save Current Values
2-22 Setup and Operation 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 Press <F1> to resume, <F2> to Setup The CMOS values have been corrupted or modified incorrectly, perhaps by an application program that changes data stored in CMOS.
Page 53: 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 54: System Board Jumpers
2-24 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 Figure Section 2-7 shows the factory settings and locations of the system board jumpers.
Page 55: System Configuration Jumpers
Setup and Operation 2-25 Table Section 2-14 shows the factory settings of the system configuration jumpers and ex- plains the function of each position. Table Section 2-14 System Configuration Jumpers Jumper Function Factory Setting Clear CMOS jumper – Reset CMOS to factory settings. 2–3 Shorted 1–2 Shorted: Clears and resets CMOS to factory settings 2–3 Shorted: Normal operation...
Page 56 2-26 Setup and Operation Table Section 2-14 System Configuration Jumpers Jumper Function Factory Setting JP9E Printer port DACK jumpers – Selects the DMA acknowledge- 19–20 Shorted ment for the parallel port. 17–18 Shorted: DACK1 19–20 Shorted: DACK3 JP11 Sleep mode power saver jumper – Selects the processor clock 1–2 Shorted (4100M) speed in sleep mode.
Page 57: Section 3 Options
DRAM module, video cache chip, 5 1/4-inch devices, and a monitor option. 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. INTERNAL OPTIONS All internal options require the top cover to be removed.
Page 58: 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 shown in Figure Section 3-1. Screws Figure Section 3-1 Desktop Cover Screws Slide the top cover toward the rear about one inch.
Page 59: 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 shown in Figure Section 3-4. Screws Figure Section 3-4 Minitower Cover Screws...
Page 60: Expansion Board(S)
Options Slide the top cover toward the rear about one inch (see Figure Section 3-6). Lift the top cover up and aff the system unit. Figure Section 3-6 Removing the Minitower Cover Expansion Board(s) There are five ISA 8/16-bit expansion slots on the ISA backboard. One of the five is an ISA/VL-Bus expansion slot.
Page 61: 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 (see Figure Section 3-8). 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 ISA/VL-Bus backboard, remove the backside expansion slot screws shown in Figure Section 3-10.
Page 62: Removing The Inside Expansion Slot Bracket
Options Slot Cover Slot Cover Screw (for top slot) Figure Section 3-10 Inside Expansion Slot Screw When removing an expansion slot cover from the inside of the ISA/VL-Bus back- board, separate the inside expansion slot L-bracket from the expansion slot cover by removing the screw shown in Figure Section 3-12.
Page 63: Minitower Expansion Board Installation
Options Reinstall the expansion slot screw to secure the expansion board. Connect any expansion board cables. Replace the top cover. 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 (see Figure Section 3-14).
Page 64: Expansion Board Troubleshooting
Options Expansion Board Troubleshooting If a fault occurs at power-on, verify that the expansion board installation was performed correctly. One beep indicates that the computer has completed its power-on self-test. If in- termittent beeping occurs, turn off the computer and try again. If the beeping persists, see “Troubleshooting”...
Page 65: System Board Options
Options System Board Options The following system board options are available for all the desktop and minitower systems. OverDrive processor SIMM memory Secondary cache Video DRAM module Video cache chip Once the top cover is removed (as previously described), use Figure Section 3-16 to locate each of the system board option sockets.
Page 66: Overdrive Processor Installation
CAUTION: Heatsinks are required for micro- processors, math coprocessors, and OverDrive processors installed in the systems. Heatsinks are available through NEC. Install a OverDrive processor into the system board as follows. Remove the top cover and any expansion boards covering the PGA/OverDrive socket as previously described.
Page 67: Overdrive Processor Alignment
Options 3-11 Insert the OverDrive processor by aligning the knotch corner with inner alignment hole of the socket (see Figure Section 3-20). Notched Corner of Chip (heatsink not shown) Alignment Hole Figure Section 3-20 OverDrive Processor Alignment Set the jumper settings for the installed OverDrive processor (see Section 2, Setup and Operation).
Page 68: Overdrive Processor Troubleshooting
Section 3 Options OverDrive Processor Troubleshooting If a fault occurs at power-on, verify that the installation was performed correctly. One beep indicates that the computer has completed its power-on self-test. If intermittent beeping oc- curs, turn off the computer and try again. If the beeping persists, see Section 4, Mainte- nance and Troubleshooting.
Page 69: Simm Memory Installation
3-12 Options SIMM Memory Installation The system board comes standard with 4 MB of memory. Memory over the first megabyte of RAM is extended RAM. SIMM 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 70: Simm Configurations
Options 3-13 Table Section 3-3 SIMM Configurations Memory Bank 0 Bank 1 Bank 2 Bank 3 4 MB 4-MB SIMM Empty Empty Empty 8 MB 4-MB SIMM 4-MB SIMM Empty Empty 8 MB 8-MB SIMM Empty Empty Empty 12 MB 4-MB SIMM 4-MB SIMM 4-MB SIMM...
Page 71: Simm Installation
3-14 Options SIMM Installation Install SIMM sticks into the system board as follows. Remove the top cover and any expansion boards covering the socket as previ- ously described. Insert the SIMM into the SIMM socket at an angle, then push the SIMM upright so that the clips hold the SIMM in place (see Figure Section 3-1).
Page 72: Simm Upgrade Kit Troubleshooting
Options 3-15 SIMM Upgrade Kit Troubleshooting If a fault occurs at power-on, verify that the reassembly was performed correctly. One beep indicates that the computer has completed its power-on self-test. If intermittent beeping oc- curs, turn off the computer and try again. If the beeping persists, see Section 4, Mainte- nance and Troubleshooting.
Page 73: Secondary Cache Installation
3-16 Options Secondary Cache Installation The system board comes standard with 8 KB of cache integrated into the Intel486SX-33 and the Intel486DX2-66 CPUs. The Intel486DX4-100 has 16 KB of integrated cache. The CPU cache is called the primary cache and any cache not integrated into the CPU is call secondary cache.
Page 74: Secondary Cache Kit Troubleshooting
Options 3-17 Secondary Cache Kit Troubleshooting If a fault occurs at power-on, verify that the reassembly was performed correctly. One beep indicates that the computer has completed its power-on self-test. If intermittent beeping oc- curs, turn off the computer and try again. If the beeping persists, see Section 4, Mainte- nance and Troubleshooting.
Page 75: Video Dram Module Installation
3-18 Options Video DRAM Module Installation The system board comes standard with 1 MB of video DRAM integrated into the system board. The optional video DRAM kit consists of two 256K x 16 (512 KB) modules which adds 1 MB of video DRAM, and a video cache chip. The cache chip must be installed when installing the video DRAM modules.
Page 76: Video Dram Module Troubleshooting
Options 3-19 Video DRAM Module Troubleshooting If a fault occurs at power-on, verify that the reassembly was performed correctly. One beep indicates that the computer has completed its power-on self-test. If intermittent beeping oc- curs, turn off the computer and try again. If the beeping persists, see Section 4, Mainte- nance and Troubleshooting.
Page 77: Video Cache Ram Chip Installation
3-20 Options Video Cache RAM Chip Installation The video cache chip enhances the video performance when installed with the optional video DRAM modules. The cache chip provides 128 KB (256K x 4)of cache to the video controller. The optional video cache chip is installed into the video cache socket on the system board shown in Error! Reference source not found..
Page 78: Video Cache Ram Chip Troubleshooting
Options 3-21 Video Cache RAM Chip Troubleshooting If a fault occurs at power-on, verify that the reassembly was performed correctly. 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.
Page 79: Optional 5 1/4-Inch Slot Devices
OPTIONAL 5 1/4-INCH SLOT DEVICES This subsection provides the procedures for installing an optional 5 1/4-inch device into the system unit. The optional NEC diskette and hard disk drives are described first, then proce- dures for installing the devices follow.
Page 80: Hard Disk Drives
Options 3-23 PCB (connectors and jumpers are attached to back of PCB) Power Connector Terminating Resistor Jumper Not Used Drive Address (0, 1, 2, 3) Signal Connector Front of Drive Figure Section 3-11 FD1158C, 1.2-MB Diskette Drive Hard Disk Drives There are two IDE interface connectors on the system board.
Page 81 3-24 Options NOTE: All NEC hard disk drives are shipped with the jumpers set for: master, one drive in- stalled. One drive installed- (Factory Setting) Power Connector Two drives installed- Slave Two drives installed- Master Cable Select Configuration Signal Connector...
Page 82: Desktop 5 1/4-Inch Device Installation
Options 3-25 DESKTOP 5 1/4-INCH DEVICE INSTALLATION To install a 5 1/4-inch device into the desktop system, the top cover, 5 1/4-inch blank panel, and the 3 1/2-inch drive bracket must first be removed. “Minitower 5 1/4-inch Device In- stallation” instructions are provided later in this section. When device option kits come with rails preattached.
Page 83: Desktop Blank Panel Removal
3-26 Options Desktop Blank Panel Removal 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. Unplug the following cables from their connectors (see Figure Section 3-19). Power lamp (connector P15) Hard disk drive busy lamp (connector P7) Reset button (connector P5)
Page 84: Desktop 5 1/4-Inch Device Placement
Options 3-27 From the inside of the front panel, release the blank panel tabs and remove the panel from the front panel (see Figure Section 3-21). Front Panel Cover (inside view) Blank Panels 2 of 4 Tabs Figure Section 3-21 Desktop Blank Panel Removal NOTE: The system unit chassis may also re- quire a slot cover punch-out to be removed.
Page 85: 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). Drive Cage 2 of 4 Screws Figure Section 3-23 Desktop 5 1/4-Inch Device Screws Continue to desktop 5 1/4-inch device cabling.
Page 86: Desktop 5 1/4-Inch Hard Disk Drive Cabling
Options 3-29 Locate the power connector coming from the power supply and plug correct fit- ting power cable into the device power connector (see Figure Section 3-25). 1.2-MB Diskette Drive Connector Red Edge Power Cable Diskette Drive Signal Cable Figure Section 3-25 Desktop 5 1/4-Inch Diskette Drive Cables Desktop 5 1/4-Inch Hard Disk Drive Cabling Cable the hard disk drive per Figure 3-18 and the following steps.
Page 87: Finishing Desktop 5 1/4-Inch 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 3-27). Power Cable Cable Figure Section 3-27 Desktop 5 1/4-Inch Hard Disk Drive Cables Finishing Desktop 5 1/4-Inch Device Installation Replace the assemblies removed earlier and reconfigure the system as follows.
Page 88: Minitower Blank Panel Removal
Options 3-31 NOTE: Do not remove the 5 1/4-inch blank panel when installing a hard disk drive. The 3 1/2-inch hard disk drives must be mounted in a 5 1/4-inch bracket. Minitower Blank Panel Removal Remove the front panel assembly from the desktop chassis as follows. Remove the minitower cover as previously described.
Page 89: Device Cage Slot Cover
3-32 Options Remove the metal slot cover from the device cage by pushing the slot cover out from the inside of the cage (see Figure Section 3-31). Slot Covers Figure Section 3-31 Device Cage Slot Cover...
Page 90: Minitower 5 1/4-Inch Device Placement
Options 3-33 Minitower 5 1/4-Inch Device Placement Install the device into the 5 1/4-inch device slot as follows. Remove the top cover, front panel 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 91: Minitower 5 1/4-Inch Diskette Drive Cabling
3-34 Options Minitower 5 1/4-Inch Diskette Drive Cabling Cable an optional 5 1/4-inch diskette drive as follows. Locate the diskette drive signal cable (connected to the 3 1/2-inch diskette drive) and plug middle connector into the 5 1/4-inch diskette drive signal connector (see Figure Section 3-35).
Page 92: Minitower 5 1/4-Inch Hard Disk Drive Cabling
Options 3-35 Minitower 5 1/4-Inch Hard Disk Drive Cabling Cable the hard disk drive per Figure 3-18 and 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 3-37).
Page 93: Finishing Minitower 5 1/4-Inch Device Installation
3-36 Options Finishing Minitower 5 1/4-Inch Device Installation Replace the assemblies removed earlier and reconfigure the system as follows. Reinstall the 3 1/2-inch drive bracket 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 94: Optional 5 1/4-Inch Device Problems And Solutions
Options 3-37 Table Section 3-12 summarizes problems that may develop after installing a hard disk drive and lists in sequential order suggested corrective actions. Table Section 3-12 Optional 5 1/4-Inch Device Problems and Solutions Problem Symptom Solution No power Power lamp on computer 1.
Page 95: Nec Svga Monitor
6. Replace system board. NEC SVGA MONITOR This subsection explains how to connect an NEC SVGA Monitor and perform all adjust- ments, switch settings, and external controls. Because each system board has an integrated video controller, the monitor does not require a video controller board. Use the following guidelines to set up the monitor.
Page 96: Connecting The Monitor
Options 3-39 Control panels for the NEC SVGA Monitor are on the front and rear. The monitor offers a maximum horizontal resolution of 1024 pixels by a maximum vertical resolution of 768 pix- els. The NEC SVGA Monitor provides system compatibility via the following features: provides automatic adjustment to vertical and horizontal frequencies including VGA, SVGA, EVGA, and VESA VGA.
Page 97: Monitor Connections
3-40 Options Connect one end of the power cord to the monitor. Plug the other end into the AC wall outlet. NOTE: Figure Section 3-39 shows the monitor connection in the minitower orientation. If the system unit in the figure were in the desktop position, attach the monitor to the same connector.
Page 98: Front Control Panel
Options 3-41 Front Control Panel The front control panel on the NEC SVGA Monitor is shown in Figure Section 3-41. Ex- planations of the individual controls follow the figure. Power Indicator Power Switch Horizontal Vertical Height Brightness Contrast Width Control...
Page 99: Rear Control Panel
3-42 Options Rear Control Panel The rear control panel on the NEC SVGA Monitor is shown in Figure Section 3-43. Expla- nations of the individual controls follow the figure. The tilt/swivel feature allows proper po- sitioning of the monitor. Vertical Center...
Page 100: Nec Svga Monitor Troubleshooting
Options 3-43 NEC SVGA Monitor Troubleshooting Use Table Section 3-14 to help isolate and repair NEC SVGA monitor malfunctions. NEC Services and Information telephone numbers are listed in Section 4, Table 4-1. NOTE: The monitor and cable together are considered a whole-unit, field-replaceable assem- bly.
Page 101: Section 4 Maintenance And Troubleshooting
Section 4 Maintenance and Troubleshooting This section provides information on maintaining and troubleshooting PowerMate 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 102: Maintenance
Maintenance and Troubleshooting MAINTENANCE This subsection contains general information for cleaning and checking the computer's sys- tem 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 103: 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 4-1). NOTE: The keyboard and cable together are considered a whole-unit, field-replaceable assem- bly.
Page 104: 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 105: 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. Table Section 4-2 BIOS Update Utility Error Messages...
Page 106: 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 4-4. Table Section 4-3 summarizes problems that may develop during computer operation and lists (in sequential order) suggested corrective actions.
Page 107 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 108 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 109 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 110: Diagnostic Output And Beep Codes
4-10 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 4-4 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 111 Maintenance and Troubleshooting 4-11 Table Section 4-4 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 112: Diagnostic Output And Beep Codes Looped On Post
4-12 Maintenance and Troubleshooting Table Section 4-5 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. Oth- erwise, these errors are reported via the screen and POST continues. Use of the manufac- turing jumper requires working correctly configured CMOS.
Page 113: Disassembly And Reassembly
Section 5 Desktop Repair DISASSEMBLY AND REASSEMBLY This section contains step-by-step disassembly procedures for the desktop systems. The 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 114 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 115: Top Cover Removal
Desktop Repair Top Cover Removal Remove the top cover per as follows. 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 116: Expansion Board Removal
Desktop Repair Slide the top cover toward the front 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 the sound board, fax/modem board and any other installed expansion board(s) us- ing Figure Section 5-4 through Figure Section 5-7 and the following steps.
Page 117: Expansion Slot Screw
Desktop Repair ISA/VL-Bus Backoard Expansion Board Screw Expansion Board (installed in ISA/VL-Bus slot) Figure Section 5-4 Expansion Slot Screw Inside Expansion Slot Screw Figure Section 5-4 Inside Expansion Slot Screw Remove the board from the expansion slot.
Page 118: Removing The Expansion Slot L-Bracket
Desktop Repair When removing an expansion board from the backside of the ISA/VL-Bus back- board separate the inside expansion slot L-bracket from the expansion board by removing the screw shown in Figure Section 5-7. Expansion Board Bracket Screw L-Bracket Figure Section 5-7 Removing the Expansion Slot L-Bracket...
Page 119: Isa/Vl-Bus Backboard Removal
Desktop Repair ISA/VL-BUS Backboard Removal Remove the ISA/VL-Bus backboard from the system board as follows. Remove the top cover and all expansion slot boards as previously described. Remove the two ISA/VL-Bus backboard screws (see Figure Section 5-7). Lift the backboard away from the bracket and out of the system unit. ISA/VL-BUS Bracket Backboard...
Page 120: Indicator Panel Connectors
Desktop Repair Remove the five front panel screws (see Figure Section 5-9). Feed the two lamp and reset cables through the hole in the front of system unit chassis when removing the front panel assembly. Lamp and Reset Button Front Panel Blank Panels Connectors (not shown) Five Screws...
Page 121: Power Button Cover Removal
Desktop 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 and push the tabs through the front panel. Remove the power button from the front of the panel.
Page 122: Speaker Assembly Removal
5-10 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 P6 on the system board. Remove the speaker screw from the side of the device cage (see Figure Section 5- 12).
Page 123: Simm Removal
Desktop Repair 5-11 SIMM Removal Remove SIMM sticks from the system board as follows. 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 124: 1/2-Inch Diskette And Hard Disk Drive Removal
5-12 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 5-15).
Page 125: Inch Diskette And Hard Disk Drive Screws
Desktop Repair 5-13 Remove the four 3 1/2-inch diskette drive screws; two on each side of the drive bracket (see Figure Section 5-17). Remove the two 3 1/2-inch hard disk drive screws; two on each side of the drive bracket (see Figure Section 5-17). Pull the drives out from the front of the bracket.
Page 126: 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- 19, and the following steps. Remove the top cover, front panel, and 3 1/2-inch drive bracket as previously de- scribed.
Page 127: 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.
Page 128: 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 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 5-23).
Page 129: System Board Removal
Desktop Repair 5-17 Remove the four screws holding the power supply to the system unit (see Figure Section 5-25). 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 130: System Board Connectors And Screws
5-18 Desktop Repair Remove and label all cables connected to the system board Figure Section 5-27 provides the general locations of the connectors for the system board. Appendix A provides the pin assignments for each connector; Table Section 5-3 identifies the correct connector.
Page 131: Battery Removal
Desktop Repair 5-19 Battery Removal Remove the battery per and the following steps. Remove the top cover and 3 1/2-inch drive bracket as previously described. Locate the battery socket on the system board shown in Figure Section 5-27. Lift the battery spring clip securing the battery in (see Figure Section 5-29). CAUTION: When replacing the battery be sure to insert the battery so that the positive side is facing up.
Page 132: Illustrated Parts Breakdown
Desktop Repair Illustrated Parts Breakdown This subsection contains the illustrated parts breakdown (IPB) and NEC part numbers for the PowerMate desktop computer. Table Section 5-5 lists the field-replaceable parts for the computer. Figure Section 5-31 is the illustrated parts breakdown.
Page 133 5 1/4-inch Blank Panel (2) 158-050685-010 PowerMate 433D Logo 158-030580-000 PowerMate 466D Logo 158-030580-002 NEC Mouse (PS/2-compatible) 158-050484-002 3 1/2-inch x 1-inch, 270-MB Hard Disk 158-050693-000 3 1/2-inch x 1-inch, 340-MB Hard Disk 158-050693-001 3 1/2-inch x 1-inch, 420-MB Hard Disk...
Page 134: Powermate Desktop Illustrated Parts Breakdown
5-22 Desktop Repair Figure Section 5-31 PowerMate Desktop Illustrated Parts Breakdown* ____________ * This data was prepared May 1994. For an up-to-date listing of spare parts, please call FastFacts (800) 366-0476 and order document number 42180968.
Page 135: Powermate Desktop Options
1.2-MB Diskette Drive Kit 158-053476-000 270-MB Hard Disk Drive Kit 158-053407-011 340-MB Hard Disk Drive Kit 158-053437-008 420-MB Hard Disk Drive Kit 158-053407-013 NEC SVGA Monitor 158-053605-000 08119705 MultiSync 3FGe Color Monitor MultiSync 4FGe Color Monitor 08119709 MultiSync 5FGe Color Monitor 08119343...
Page 136: Powermate Desktop Documentation And Packaging
5-24 Desktop Repair Table Section 5-9 lists PowerMate desktop documentation and packaging. Table Section 5-9 PowerMate Desktop Documentation and Packaging* Description Part Number PowerMate Series System User's Guide 819-180950-000 PowerMate Series Quick Setup 819-180955-000 PowerMate Series Service and Reference Manual 819-180968-000 PowerMate Desktop Shipping Carton 158-040442-000...
Page 137: Powermate Minitower Disassembly Sequence
Section 6 Minitower Repair DISASSEMBLY AND REASSEMBLY This section contains step-by-step disassembly procedures for the minitower systems. The 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 138 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 139: Top Cover Removal
Minitower Repair Top Cover Removal Remove the top cover as follows. 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 140: Removing The Top Cover
Minitower Repair Slide the top cover toward the front about one inch (see Figure Section 6-2). Lift the top cover up and off the system unit chassis. Figure Section 6-2 Removing the Top Cover...
Page 141: Expansion Board Removal
Minitower Repair Expansion Board Removal Remove any installed expansion board(s) using Figure Section 6-3 and the following steps. Remove the top cover as previously described. Disconnect any cables leading from the expansion board(s). Remove the screw from the expansion slot bracket (see Figure Section 6-3). 1 of 5 Expansion Slot Screws...
Page 142: Isa/Vl-Bus Backboard Bracket Screws
Minitower Repair ISA/VL-BUS Backboard Removal Remove the ISA/VL-Bus backboard as follows. Remove the top cover and all expansion slot boards as previously described. Remove the two ISA/VL-Bus backboard bracket screws (see Figure Section 6-4). Pull the backboard and bracket and out of the system unit. ISA/VL-Bus Backboard ISA/VL-Bus...
Page 143: Front Panel Assembly Removal
Minitower Repair Front Panel Assembly Removal Remove the front panel assembly per Figure Section 6-6 and the following steps. Remove the top cover as previously described. Remove the seven front panel screws from inside the top cover (see Figure Sec- tion 6-6).
Page 144: Power Button Tabs
Minitower Repair Power Button Cover Removal Remove the power button cover per Figure Section 6-7 and the following steps. 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.
Page 145: Speaker Assembly Removal
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 connector P6 on the system board. Slide the speaker over the raised spot and out from the speaker tabs (see Figure Section 6-8).
Page 146: Simm Socket
6-10 Minitower Repair SIMM Removal Remove the SIMM sticks per Figure Section 6-9 and the following steps. 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 147: 1/2-Inch Diskette Drive Removal
Minitower Repair 6-11 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 6-13). NOTE: When reinstalling the diskette drive, note that all power cables are keyed to fit only in the correct position.
Page 148: Diskette Drive Bracket Screws
6-12 Minitower Repair Remove the two 3 1/2-inch diskette drive bracket screws shown in Figure Section 6-11. 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 149: 1/2-Inch Hard Disk Drive Removal
Minitower Repair 6-13 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 cable and signal cable from the hard disk drive (see Figure Section 6-12).
Page 150: Right Side Device Screws
6-14 Minitower Repair Remove the four 3 1/2-inch hard disk drive screws; two on each side. The two right side 3 1/2-inch hard disk drive shown in Figure Section 6-13. The two left side 3 1/2-inch hard disk drive screws shown in Figure Section 6-14. 2 of 4 3 1/2-Inch Diskette Drive Screws...
Page 151: 1/4-Inch Device Removal
Minitower Repair 6-15 5 1/4-Inch Drive Screw Access Holes 2 of 4 3 1/3-Inch Hard Disk Drive Screws (not shown) Figure Section 6-14 Left Side Device Screw Access Holes Remove the 3 1/2-inch hard disk drive out from inside the chassis. 5 1/4-Inch Device Removal Remove a 5 1/4-inch device from the 5 1/4-inch device cage as follows.
Page 152: 1/4-Inch Device Cage Removal
6-16 Minitower Repair 5 1/4-Inch Device Cage Removal Remove the 5 1/4-inch device cage from the system unit as follows. NOTE: Devices installed the device cage can be removed from the device cage without removing the device cage. See the previous procedure. Remove the top cover as previously described.
Page 153: Power Button Screws
Minitower Repair 6-17 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 6-16).
Page 154: Power Supply Screws
6-18 Minitower Repair Remove the five screws securing the power supply to the system unit and remove the power supply (see Figure Section 6-17). Power Supply Screws Power Supply Screw (not shown) Figure Section 6-17 Power Supply Screws System Board Removal Remove the system board per Figure Section 6-18 and the following steps.
Page 155: Connector Identifiers
Minitower Repair 6-19 Remove the seven screws that hold the system board to the system unit chassis (see Figure Section 6-18). Remove the system board out the side of the system unit. Secondary Cache SIMM Socket Sockets 1 of 7 Screws Reset Button Connector Hard Disk...
Page 156: Battery Removal
6-20 Minitower Repair Battery Removal Remove the battery per Figure Section 6-19 and the following steps. Remove the top cover and as previously described. Remove the two 3 1/2-inch diskette drive bracket screws from the front of the system unit (see Figure Section 6-15). Slide the 3 1/2-inch diskette drive with bracket out of the system unit.
Page 157: Powermate Minitower Field-Replaceable Parts List
Minitower Repair 6-21 Illustrated Parts Breakdown This subsection contains the illustrated parts breakdown (IPB) and NEC part numbers for the PowerMate minitower computer. Table Section 6-3 lists the field-replaceable parts for the computer. Figure Section 6-20 is the illustrated parts breakdown.
Page 158 6-22 Minitower Repair Table Section 6-3 PowerMate Minitower Field-Replaceable Parts List* Item Description Part Number Battery 158-056137-000 Power Supply 158-050699-000 Minitower Chassis 158-050698-002 NEC Mouse (PS/2-compatible) 158-050484-002 Keyboard 158-050707-000 Speaker Assembly 158-050698-003 Power Cord 158-050697-000 ISA/VL-Bus Backboard Bracket 158-050698-006...
Page 159: Powermate Minitower Illustrated Parts Breakdown
Minitower Repair 6-23 Figure Section 6-20 PowerMate Minitower Illustrated Parts Breakdown* ____________ * This data was prepared May 1994. For an up-to-date listing of spare parts, please call FastFacts (800) 366-0476 and order document number 42180968.
Page 160: Powermate Minitower Options
1.2-MB Diskette Drive Kit 158-053476-000 270-MB Hard Disk Drive Kit 158-053407-011 340-MB Hard Disk Drive Kit 158-053437-008 420-MB Hard Disk Drive Kit 158-053407-013 NEC SVGA Monitor 158-053605-000 MultiSync 3FGe Color Monitor 08119705 MultiSync 4FGe Color Monitor 08119709 MultiSync 5FGe Color Monitor 08119343...
Page 161: Powermate Minitower Documentation And Packaging
Minitower Repair 6-25 Table Section 6-5 lists PowerMate minitower documentation and packaging. Table Section 6-5 PowerMate Minitower Documentation and Packaging* Description Part Number PowerMate Series System User's Guide 819-180950-000 PowerMate Series Quick Setup 819-180955-000 PowerMate Series Service and Reference Manual 819-180968-000 PowerMate Minitower Series Shipping Carton 158-040446-000...
Page 162 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 con- nector function with the connector number. Descriptions of the connectors are provided in the following subsections.
Page 163 Connector Pin Assignments Table Appendix A-1 System Board Connector Descriptions Function Connector Number Type Keyboard 6-pin PS/2 style connector Mouse 6-pin PS/2 style connector Speaker 1 x 4 pin header Monitor (VGA interface) 15 pin female sub D-shell Serial interface COM1/COM2 P11/P12 9 pin D-shell Parallel interface...
Page 164: 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 165: 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-4. Figure Appendix A-4 Parallel Interface (P10)
Page 166: 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 Appendix A-2 shows the connector pin locations and pin assignments. Table Appendix A-2 Video Connector (P8) Pin Assignments Signal...
Page 167: Power Supply Connectors
Connector Pin Assignments Power Supply Connectors Voltages from the power supply are input to the system board through the power supply connector. Figure Appendix A-6 shows the connector pin locations and pin assignments. Power Good Signal Figure Appendix A-6 Power Supply Connector (P3/P4) Pin Assignments Keyboard and Mouse Connectors The keyboard and mouse use standard PS/2 connectors.
Page 168: Power Lamp Connector
Connector Pin Assignments Power Lamp Connector Power connector pin assignments are given in Table Appendix A-8. Table Appendix A-8 Power Lamp Connector (P5) Pin Assignments Signal Lamp Power Not used Lamp return Hard Disk Drive Lamp Connector Hard disk drive lamp connector pin assignments are given in Table Appendix A-10. Table Appendix A-10 Hard Disk Drive Busy Lamp Connector (P7) Pin Assignments Signal...
Page 169: Diskette Drive Interface Pin Assignments
Connector Pin Assignments Diskette Drive Interface Pin Assignments Table Appendix A-14 provides the pin assignments for the diskette drive interface. Table Appendix A-14 Diskette Drive Connector (P13) Pin Assignments Ground Signal Signal Name –WCCTRL — Not used — Not used —...
Page 170 Connector Pin Assignments IDE Interface Connectors All signal levels in the IDE interface are TTL compatible. A logic 1 is a signal whose volt- age level is between 2.0 and 5.0 V. A logic 0 is a signal measuring between 0.00 V and 0.70 V.
Page 171 A-10 Connector Pin Assignments SIMM Sockets Table Appendix A-18 provides the U1, U2, U10, and U11 SIMM pin assignments. Table Appendix A-18 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 * CAS0 = Bank 0 CAS1 = Bank 1...
Page 172 Connector Pin Assignments A-11 Secondary Cache Socket Table Appendix A-20 provides the secondary cache socket pin assignments. Table Appendix A-20 Secondary Cache Pin Assignments (U49) Signal Signal Signal IA11...
Page 173 A-12 Connector Pin Assignments ISA Expansion Bus Connector Pin Assignments The expansion slots have the following specifications: I/O port addresses 378 through 37F, 2F8 through 2FF, and 3F8 through 3FF are used by the system board (can be disabled). 8 MHz bus timing. 8/16-bit data transfer, DMA controlled.
Page 174 Connector Pin Assignments A-13 Table Appendix A-22 ISA Expansion Slot Pin Assignments Direction Signal Direction Signal Input/Output SA15 Input DRQ3 Input/Output SA14 Output DACK1 Input/Output SA13 Input DRQ1 Input/Output SA12 Input/Output REFRESH Input/Output SA11 Output BCLK Input/Output SA10 Input IRQ07 Input/Output SA09 Input...
Page 175 A-14 Connector Pin Assignments Table Appendix A-22 ISA Expansion Slot Pin Assignments Direction Signal Direction Signal Input/Output SD14 Input MASTER Input/Output SD15 Ground...
Page 176 Connector Pin Assignments A-15...
Page 177 Appendix B Specifications This section provides the specifications for the system unit, power supply, diskette drives, hard disk drives, and NEC SVGA Monitor. SYSTEM UNIT SPECIFICATIONS Table B-1 lists system unit specifications. Table Appendix B -1 System Unit Specifications Item...
Page 178 Specification 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 Reset button...
Page 179 Specifications Table Appendix B -1 System Unit Specifications Item Specification Administrative Compliance UL 1950 - safety CSA C22.2 No. 950-m89 TUV EN60950: 1988 FCC part 15, Subpart J, Class B - emissions FCC part 68 C.R.C., c.1374 IEC 950 - safety VDE 0871/6.78, Class B - emissions POWER SUPPLY SPECIFICATIONS Table B-2 lists the input power specifications for the power supply.
Page 180 Specification DISKETTE DRIVE SPECIFICATIONS Table B-4 lists the specifications for the diskette drives. Table Appendix B -4 Specifications for Diskette Drives Features OSDA-90C 1.44-MB FD1158C 1.2 MB Storage Capacity Unformatted 2.0 MB 1.67 MB Formatted 1.44 MB 1.2 MB Recording Density Bit density 17,434 bpi 9870 bpi max...
Page 181 Specifications HARD DISK SPECIFICATIONS Specifications for the hard disk drives are given in Table Appendix B -5. Table Appendix B -5 Specifications for 270-, 340-, 420-, and CFS420-MB Hard Disk Drives Features 270-MB 340-MB 420-MB CFS420-MB Physical Configuration Formatted Capacity 270.4 MB 341.3 MB 425.3 MB...
Page 182 Specification NEC SVGA MONITOR SPECIFICATIONS Table Appendix B -6 lists the NEC SVGA Monitor specifications. Table Appendix B -6 NEC SVGA Monitor Specifications Item Specification Picture Tube 14-inch, 90 degree deflection, 0.28 mm trio dot pitch Input Signal Video: Analog 0.7 Vp-p/75 ohms positive Sync.:...
Page 183 (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 184 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.

This manual is also suitable for:

Powermate 433d Powermate 466d Powermate 466m

NEC POWERMATE 4100M Service Manual

Section 1 Technical Information

List of Tables

Section 2 Setup and Operation

Appendix B Specifications

Section 3 Options

Section 4 Maintenance and Troubleshooting

Section 5 Desktop Repair

Section 6 Minetower Repair

Appendix A Connector Pin Assignments

Quick Links

Troubleshooting

Related Manuals for NEC POWERMATE 4100M

Summary of Contents for NEC POWERMATE 4100M