Related Manuals for Digital Equipment DECpc LPv 425sx
Summary of Contents for Digital Equipment DECpc LPv 425sx
- Page 1 Service Maintenance Manual DECpc LPv/LPv+ K-MN-SD00000-18-JG00.A MCS LOGISTICS ENGINEERING Copyright Digital Equipment Corporation NIJMEGEN All rights reserved THE NETHERLANDS January 1996...
- Page 2 The information in this document is subject to change without notice and should not be construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that might appear in this document. The software, if any, described in this document is furnished under a license and may be used or copied only in accordance with the terms of such license.
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Page 3: Table Of Contents
Digital DECpc LPv/LPv+ Table of Contents Table of Contents REVISION HISTORY ............................7 PREFACE................................9 CHAPTER 1 PRODUCT DESCRIPTION ....................11 ...........................11 RODUCT NTRODUCTION ........................12 RODUCT ODELS NFORMATION DECpc LPv Models Information ........................12 DECpc LPv+ Models Information.........................13 CHAPTER 2 SYSTEM UTILITIES & CONFIGURATION..............15 ...............................15 YSTEM TILITIES... - Page 4 Table of Contents Digital DECpc LPv/LPv+ .............................37 EMOVAL ROCEDURES Removing a 5¼-Inch FDD..........................37 Removing a 3½-Inch FDD..........................38 Removing the Mounting Adapter ........................39 Removing the Internal Mounting Tray......................40 Removing the IDE Disk Drive from Mounting Tray ...................41 Removing the Main Logic Board ........................42 Main Logic Board Connections........................42 Removing the Power Supply .........................43 Removing the Filler Panels ..........................44...
- Page 5 Digital DECpc LPv/LPv+ Table of Contents Table of Figures Figure 3 - 1 Removing the Outside Cover......................30 Figure 3 - 2 LPv Computer Model Components....................31 Figure 3 - 3 LPv Main Logic Board Jumper Locations..................34 Figure 3 - 4 LPv and LPv+ SIMM Socket Locations..................36 Figure 3 - 5 Removing a 5¼-Inch FDD......................37 Figure 3 - 6 Removing a 3½-Inch FDD from the Top Bay ................38 Figure 3 - 7 Removing a 3½-Inch FDD from the Bottom Bay ................38...
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Page 6: Revision History
Digital DECpc LPv/LPv+ Revision History Revision History Revision Date Description of Change Januari 96 First release of the Service Maintenance Manual describing the Revision 1.0 DECpc LPv/LPv+ series computer. MCS Logistics Engineering - Nijmegen... -
Page 7: Preface
DECpc LPv/LPv+ line of PC’s. Digital Equipment Corporation reserves the right to make changes to the DECpc LPv/LPv+ series without notice. Accordingly, the diagrams and procedures in this document may not apply to the computer(s) to be serviced since many of the diagnostic tests are designed to test more than one product. -
Page 8: Chapter 1 Product Description
Digital DECpc LPv/LPv+ Product Description Chapter 1 Product Description Product Introduction DECpc LPv/LPv+ computers are a family of high-performance, low-profile personal computers equipped with the latest microprocessor and onboard video technology. They can be used as stand-alone computers, as clients, or as servers in an network environment. Developed using Intel speed-doubling CPUs and S3's 805 32-bit local-bus video architecture, along with a host of high-performance options, DECpc LPv/LPv+ computers are the most advanced low-profile desktop computers in their class. -
Page 9: Product Models Information
EC = English, French, German, Italian and Spanish. ED = Danish, Dutch, English, Finnish, French (France excluded), Norwegian and Swedish. DECpc LPv Models Information Product Model Memory Cache Options PC751-A9 None DECpc LPv 425sx PC751-WA 1.44MB 170MB None PC751-WB 1.44MB 240MB None DECpc LPv 433sx PC752-A9... -
Page 10: Decpc Lpv+ Models Information
Digital DECpc LPv/LPv+ Product Description DECpc LPv+ Models Information Product Model Memory Cache Options FR-741WW-A9 - None DECpc LPv+ 425sx FR-741**-WA 1.44MB 170MB None FR-741**-WF 1.44MB 340MB None FR-742WW-A9 - None DECpc LPv+ 433sx FR-742**-WA 1.44MB 170MB None FR-742**-WF 1.44MB 340MB None DECpc LPv+ 433dx FR-743WW-A9 -... -
Page 11: Chapter 2 System Utilities & Configuration
Digital DECpc LPv/LPv+ Utilities & Configuration Chapter 2 System Utilities & Configuration System Utilities This chapter describes how to use the two diskettes supplied with the DECpc LPv/LPv+ computer. Diskette 1: System and S3 86C805 VGA Utilities and DOS Video Drivers This diskette contains the following files: ♦... -
Page 12: Using The System Utilities Diskette
Utilities & Configuration Digital DECpc LPv/LPv+ Using the System Utilities Diskette The System and S3 86C805 VGA Utilities and DOS Video Drivers allow to: ♦ Access the computer's BIOS Setup utility. ♦ Set a keyboard and mouse password. ♦ Take full advantage of the enhanced video features. NOTE If this is the first time using the System Utilities diskette, it is recommended to follow the procedures in the order given. -
Page 13: Smtr.exe
Digital DECpc LPv/LPv+ Utilities & Configuration Remove the backup copy of the System Utilities diskette from drive A. Reboot the computer. SMTR.EXE The video controller's monitor type selection must match the monitor's available resolution and refresh rates. These monitor resolution and refresh rates are listed in the monitor's support documentation and in the SMTR.EXE utility on the System and S3 86C805 VGA Utilities and DOS Video Drivers diskette. -
Page 14: Dos Video Drivers
Utilities & Configuration Digital DECpc LPv/LPv+ If you want to Type SMODE followed by Example Display a non-standard VGA <hex mode #> VGA SMODE 55 VGA mode Emulate a non-VGA mode Either EGA, CGA, MDA, or Hercules SMODE MDA SMODE MDA allows the main logic board's video circuitry to emulate a monochrome adapter. If applicable, copy the SMODE.EXE file to a directory on the computer's hard disk drive. -
Page 15: Copying Kp.exe Onto Hard Disk
Digital DECpc LPv/LPv+ Utilities & Configuration Copying KP.EXE onto Hard Disk Turn on the computer and allow POST to complete without error. Insert the backup copy of the System Utilities diskette into drive A. At the MS-DOS prompt type a: then press [Enter] to access drive A. At the A:\>... -
Page 16: Setting High Resolution Mode For The Monitor Display
Utilities & Configuration Digital DECpc LPv/LPv+ Toggle through the Display option to select Other (Requires disk provided by hardware manufacturer). Place the S3 86C805 Windows 3.x Drivers diskette in drive A, then press [Enter]. A list of S3 video drivers appears in a box at the bottom the screen. Select the desired video resolution then press [Enter]. -
Page 17: Configuring The Computer
Digital DECpc LPv/LPv+ Utilities & Configuration Configuring the Computer The information listed below explains how to configure the computer using the BIOS Setup utility. If the computer was delivered with factory-installed software, it has already been configured. When familiar with utility programs and their uses, refer to the material in the options table while updating the computer. -
Page 18: Bios Setup Utility Options
Utilities & Configuration Digital DECpc LPv/LPv+ BIOS Setup Utility Options Menu Field Settings Comments System time Current time Displays the current time. Current date Displays the current date. System date English Sets the desired language. Language Français Deutsch Italiano Español 3.5", 1.44 MB Sets the size and density of diskette drives. - Page 19 Digital DECpc LPv/LPv+ Utilities & Configuration BIOS Setup Utility Options (continued) Menu Field Settings Comments Enabled Enables or disables the ROM base setup utility. ROM based setup Disabled Note: Disabling this option prevents unauthorized personnel from changing any computer's configuration parameters. Enabled Enables the mouse port and assigns IRQ12.
- Page 20 Utilities & Configuration Digital DECpc LPv/LPv+ BIOS Setup Utility Options (continued) Menu Field Settings Comments Enabled Enables or disables the onboard diskette drive controller. Diskette drive Disabled Exchange Disabled Allows to logically exchange physical diskette drive designations. Enabled diskette drives Enabled Enables or disables the onboard IDE disk drive controller.
- Page 21 Digital DECpc LPv/LPv+ Utilities & Configuration BIOS Setup Utility Options (continued) Menu Field Settings Comments Enabled Allows to enable or disable a caching request for the computer's Cache BIOS Disabled BIOS. Note: This option allows the computer's BIOS to be cached in the primary cache and secondary cache (if installed).
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Page 22: Chapter 3 Service Procedures
Digital DECpc LPv/LPv+ Service Procedures Chapter 3 Service Procedures Safety Requirements WARNING Static electricity collects on non-conductors such as paper, cloth, or plastic. A static discharge can be damaging even though you often cannot see or feel it. The following safety precautions must be observed to insure product and personal safety and prevent damage to circuit boards and/or components: ♦... -
Page 23: Recommended Tools
Service Procedures Digital DECpc LPv/LPv+ Recommended Tools The following tools will be needed for servicing Digital PC systems. Note that test equipment must be in calibration. ♦ Multimeter (4 1/2 digit) ♦ A philips screwdriver ♦ An antistatic wrist strap Other Needed Materials Cleaning agent should be an all purpose cleaner that is used in-house. -
Page 24: Eco/Fco Information
Digital DECpc LPv/LPv+ Service Procedures ECO/FCO Information BIOS version information. Refer to the Digital DECpc Bulletin Board Support , for the latest information on BIOS upgrades Network locations: North America, South America, Australia and New Zealand: PCBUHD::DKB300:[WC30.BBSFILES] Europe, Africa, Middle and Far East: SUTRA::D6:[PUBLIC]. -
Page 25: Unlocking And Removing Cover
Service Procedures Digital DECpc LPv/LPv+ Unlocking and Removing Cover WARNING You might injure yourself or damage the computer when attempting to remove the cover before unplugging ac and monitor power cords. Before removing the outside cover, do the following: Turn off power to all external devices connected to computer. Turn computer off. -
Page 26: Computer Components
Digital DECpc LPv/LPv+ Service Procedures Computer Components Legend Description Power supply (under the internal drive bay) Three ISA expansion slots Main logic board 3½-inch diskette drive Front access drive bays Internal drive bay ISA slots Figure 3 - 2 LPv Computer Model Components MCS Logistics Engineering - Nijmegen... -
Page 27: Main Logic Board Jumpers
Service Procedures Digital DECpc LPv/LPv+ Main Logic Board Jumpers Jumper pins allow to set specific computer parameters. They are set by changing the pin location of jumper blocks. Note that the square pin of each jumper block is pin 1. A jumper block is a small plastic-encased conductor (shorting plug) that slips over the pins. - Page 28 Digital DECpc LPv/LPv+ Service Procedures LPv Main Logic Board Jumper Settings (continued) Feature Description Setting Cache size select 0 KB J3, open J4, open J6, open J7, open 128 KB J3, pins 1 and 2 jumpered J4, pins 1 and 2 jumpered J6, pins 1 and 2 jumpered J7, pins 1 and 2 jumpered 256 KB...
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Page 29: Lpv Main Logic Board Jumper Locations
Service Procedures Digital DECpc LPv/LPv+ LPv Main Logic Board Jumper Locations Figure 3 - 3 LPv Main Logic Board Jumper Locations MCS Logistics Engineering - Nijmegen... -
Page 30: Computer Memory Configurations
Digital DECpc LPv/LPv+ Service Procedures Computer Memory Configurations Adding more memory allows the computer to run larger, more complicated software and to run it faster. LPv and LPv+ Memory Configurations The computer comes with at least 4 MB of memory. 4 MB or 16 MB single in-line memory modules (SIMMs) may be added. -
Page 31: Lpv And Lpv+ Simm Socket Locations
Service Procedures Digital DECpc LPv/LPv+ LPv and LPv+ SIMM Socket Locations Figure 3 - 4 LPv and LPv+ SIMM Socket Locations MCS Logistics Engineering - Nijmegen... -
Page 32: Removal Procedures
Digital DECpc LPv/LPv+ Service Procedures Removal Procedures Removing a 5¼-Inch FDD To remove a 5¼-Inch FDD: Turn off the computer. Remove two retaining screws from each side of bottom bay. Remove FDD from bay. Figure 3 - 5 Removing a 5¼-Inch FDD MCS Logistics Engineering - Nijmegen... -
Page 33: Removing A 3½-Inch Fdd
Service Procedures Digital DECpc LPv/LPv+ Removing a 3½-Inch FDD To remove a 3½-Inch FDD: Turn off the computer. Disconnect external devices, ac power and monitor power. Unlock and remove outside cover. Disconnect power and ribbon cables. From the top bay, remove two retaining screws from each side. Remove FDD from bay. -
Page 34: Removing The Mounting Adapter
Digital DECpc LPv/LPv+ Service Procedures Removing the Mounting Adapter To remove the Mounting Adapter: Remove one retaining screw. Remove mounting adapter from chassis. NOTE Mounting bracket is required when installing a 3½ inch device in the lower 5¼ inch drive bay. Figure 3 - 8 Removing the Mounting Adapter MCS Logistics Engineering - Nijmegen... -
Page 35: Removing The Internal Mounting Tray
Service Procedures Digital DECpc LPv/LPv+ Removing the Internal Mounting Tray To remove the Mounting Adapter: Loosen four retaining screws. Lift mounting tray out of chassis. Figure 3 - 9 Removing the Internal Mounting Tray MCS Logistics Engineering - Nijmegen... -
Page 36: Removing The Ide Disk Drive From Mounting Tray
Digital DECpc LPv/LPv+ Service Procedures Removing the IDE Disk Drive from Mounting Tray To remove the IDE Disk Drive from Mounting Tray: Remove four retaining screws. Pull drive from mounting tray. Figure 3 - 10 Removing the IDE Disk Drive from Mounting Tray MCS Logistics Engineering - Nijmegen... -
Page 37: Removing The Main Logic Board
Service Procedures Digital DECpc LPv/LPv+ Removing the Main Logic Board To remove the main logic board: Turn off the computer. Disconnect external devices, ac power and monitor power. Unlock and remove outside cover. Remove all connectors. Remove expansion boards riser card. Remove mounting screws and lift main logic board from computer. -
Page 38: Removing The Power Supply
Digital DECpc LPv/LPv+ Service Procedures Removing the Power Supply To remove the power supply: Disconnect power cord. Remove screw securing power on/off cable. Remove two screws securing power supply to chassis. Remove four screws securing power supply to rear panel. Remove power supply from computer. -
Page 39: Removing The Filler Panels
Service Procedures Digital DECpc LPv/LPv+ Removing the Filler Panels To remove the Filler Panels: Turn off the computer. Disconnect external devices, ac power and monitor power. Unlock and remove outside cover. Carefully place screwdriver through hole provided at side of front access drive bay. Release plastic locking tabs. -
Page 40: Installation Procedures
Digital DECpc LPv/LPv+ Service Procedures Installation Procedures Installing External Cache Memory The computer's main logic board supports up to 256 KB of direct-mapped write back secondary cache memory. Secondary cache memory is designed to improve the performance of the CPU and is installed in designated DIP sockets on the main logic board. -
Page 41: Figure 3 - 14 Installing External Cache Memory
Service Procedures Digital DECpc LPv/LPv+ Figure 3 - 14 Installing External Cache Memory MCS Logistics Engineering - Nijmegen... -
Page 42: Installing A Higher Performance Cpu
Digital DECpc LPv/LPv+ Service Procedures Installing a Higher Performance CPU To install a higher performance CPU: Disconnect power cord. Unlock and remove outside cover. Remove the CPU. Install new CPU. Set appropriate jumpers. Figure 3 - 15 Installing a Higher Performance CPU MCS Logistics Engineering - Nijmegen... -
Page 43: Replacement Procedures
Service Procedures Digital DECpc LPv/LPv+ Replacement Procedures Replacing the Computer Battery/Real Time Clock (RTC) WARNING Make sure pin 1 on battery is correctly aligned with location on socket (see figure). Incorrect installation can cause faulty computer operation. To replace the computer battery/real time clock: Record computer configuration settings. -
Page 44: Connecting Diskette And Ide Devices
Digital DECpc LPv/LPv+ Service Procedures Connecting Diskette and IDE Devices To connect diskette and IDE devices, perform the following: Connect supplied ribbon cable to appropriate device as shown. Connect appropriate power cable to device. Replace and lock outside cover. Connect external devices and restore power. NOTE Make sure the cable is connected with correct orientation. -
Page 45: Chapter 4 Troubleshooting
Digital DECpc LPv/LPv+ Troubleshooting Chapter 4 Troubleshooting The following pages provide initial troubleshooting procedures and tables listing specific problems, probable causesand recommended actions to take if the computer fails after configuration or after installation of optional hardware or software. Refer to the documentation supplied with additional options when experiencing problems with specific options that have been installed. -
Page 46: Beep Codes
Troubleshooting Digital DECpc LPv/LPv+ Beep Codes If the POST finds an error and cannot display a message, the computer's speaker emits a series of beeps to indicate the error and places a value in I/O port 80h. For example, a failure of bit 3 in the first 64 KB of RAM is indicated by a 2-1-4 beep code (a burst of two beeps, a single beepand a burst of four beeps). -
Page 47: Beep Codes For Non-Fatal Errors
Digital DECpc LPv/LPv+ Troubleshooting Beep Codes for Fatal Errors (continued) Beep Code Error Message Gate A20 failure 4-2-3 Unexpected interrupt in protected mode 4-2-4 4-3-1 RAM failure (above 0FFFFh) 4-3-3 Interval timer 2 failure Time-of-day clock failure 4-3-4 Serial port failure 4-4-1 Parallel port failure 4-4-2... - Page 48 Troubleshooting Digital DECpc LPv/LPv+ POST and Boot Messages (continued) Message Solution Replace main logic board. No timer tick Replace main logic board. Shutdown failure Timer 2 failure Replace main logic board. Keyboard stuck key Check the keyboard connection. If the connection is secure, the keyboard or keyboard controller might Keyboard controller Keyboard clock line have failed.
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Page 49: Computer Troubleshooting
Digital DECpc LPv/LPv+ Troubleshooting Computer Troubleshooting Problem Possible Cause Action No response Main logic board failure. Replace main logic board. when the computer is Main logic board jumpers Set all appropriate jumpers. incorrectly set. turned on Brightness and contrast controls Adjust the brightness and contrast controls. - Page 50 Troubleshooting Digital DECpc LPv/LPv+ Computer Troubleshooting (continued) Problem Possible Cause Action Operating system software is not Install the appropriate operating system. Computer does not boot from installed on the SCSI hard disk drive. an internal SCSI hard disk Requested partition does not Partition the SCSI hard disk drive and then reload drive exist.
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Page 51: Disk Drive Troubleshooting
Digital DECpc LPv/LPv+ Troubleshooting Computer Troubleshooting (continued) Problem Possible Cause Action Drive ID incorrectly set. Make sure the drive ID is correctly set (refer to the Computer does not boot from a documentation supplied with the diskette drive). target diskette drive Diskette drive not enabled. -
Page 52: Monitor Troubleshooting
Troubleshooting Digital DECpc LPv/LPv+ Monitor Troubleshooting Problem Possible Cause Action Monitor is turned off. Turn on the monitor. Monitor power indicator is not Power indicator is defective. Replace the failed component. Configuration error. Run the BIOS SETUP UTILITY to configure the No screen computer for VGA operation. -
Page 53: Qaplus/Fe Error Messages
Digital DECpc LPv/LPv+ Troubleshooting QAPlus/FE Error Messages Component Messages Solution Arithmetic Function Failed. Reset CPU. General Functions Failed. Replace CPU. Exception Interrupt in Protected Mode. Refresh Failure. Logic Functions Failed. Hard disk Butterfly Cylinder Access Test Low-level format hard disk. Failed. -
Page 54: Chapter 5 Device Mapping
Digital DECpc LPv/LPv+ Device Mapping Chapter 5 Device Mapping This section provides a series of tables listing mapping and address information related to computer memory and various main logic board devices (keyboard controller, interrupt controller, DMA controller, etc.). The computer's memory and address locations are allocated at the factory to operate within a standard PC environment. -
Page 55: I/O Address Map
Device Mapping Digital DECpc LPv/LPv+ I/O Address Map Range (hexadecimal) Function DMA controller one 000 - 00F Interrupt controller one 020 - 021 Index register (85C461) Data register (85C461) Interval timer 040 - 043 Keyboard controller 060 - 06F Real-time clock (RTC), NMI 070 - 07F 080 - 08F DMA page register... -
Page 56: Computer Interrupt Levels
Digital DECpc LPv/LPv+ Device Mapping Computer Interrupt Levels Priority Interrupt Controller Interrupt Number Interrupt Source IRQ0 Timer tick IRQ1 Keyboard controller IRQ2 Cascade interrupt IRQ8 Real-time clock (RTC) IRQ9 Reserved IRQ10 Reserved IRQ11 Reserved IRQ12 Mouse interrupt IRQ13 Math coprocessor IRQ14 Hard disk drive IRQ15... -
Page 57: Chapter 6 Pass / Fail Criteria
Digital DECpc LPv/LPv+ Pass / Fail Criteria Chapter 6 Pass / Fail Criteria As Final Acceptance Test the following tests should be run to meet the Pass/Fail criteria: Successful completion of the POST tests. Successful completion of the following QAPLUS/fe module tests (one pass): ♦... -
Page 58: Appendix A Service Notes
Digital DECpc LPv/LPv+ Service Notes Appendix A Service Notes This appendix contains the service notes for the DECpc LPv/LPv+ series computer. MCS Logistics Engineering - Nijmegen... -
Page 59: Appendix B Useful Information
Digital DECpc LPv/LPv+ Useful Information Appendix B Useful Information Related Documentation Description Order’s DECpc LPv/LPv+ Quick Reference Guide EK-A0882-RG EK-A0815-RG SMM Spares Catalogue ER-740WW-UA DECpc LPv/LPv+ User’s Guide ER-740WW-IA DECpc LPv/LPv+ Installation Card On-Line Bulletin Boards The most current product information and technical support is also available on line. The most current device drivers, Setup diskettes and technical tips can be found on all of these bulletin boards. -
Page 60: Document Feedback
We will do our best to make this document a valuable support to your service efforts for Digital. Please fill -out the reader feedback form and send or fax it to: Digital Equipment Parts Center b.v. Att: MCS Logistics Engineering Call Desk P.O. -
Page 61: Readers Comments
READERS COMMENTS DECpc LPv/LPv+ Service Maintenance Manual K-MN-SD00000-18-JG00.A This form is for documents only. Commitments submitted on this form are used at Digital’s direction. Did you find errors in this manual? If so, specify by page............................................................................................................. What is your general reaction to this manual (format, completeness, organisation etc.)? ....................................