Table of Contents
Troubleshooting
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Summary of Contents for Digital Equipment CELEBRIS 486
- Page 1 Service Maintenance Manual CELEBRIS 486 LOGISTICS ENGINEERING K-MN-SD00000-08-JG00.A Copyright Digital Equipment Corporation NIJMEGEN All rights reserved THE NETHERLANDS November 1995...
- 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
............................. 9 RODUCT NTRODUCTION ........................10 RODUCT ODELS NFORMATION CELEBRIS 486 PC Family Models ......................10 CHAPTER 2 SYSTEM UTILITIES & CONFIGURATION ..............11 ............................... 11 YSTEM TILITIES PHLASH.EXE ..............................11 Before Using PHLASH.EXE ......................... 11 Creating a Crisis Recovery Diskette......................12 Using the Crisis Recovery Diskette....................... - Page 4 Table of Contents Table of Contents Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC ........................ 31 EMOVAL AND EPLACEMENT Opening the Device Bay & Power Supply Subassembly ................31 Removing the 3½-Inch Diskette Drive......................32 Removing the Main Logic Board ........................33 Removing the Power Supply .........................
- Page 5 Figure 3 - 3 Removing the Cover ........................24 Figure 3 - 4 CELEBRIS 486 PC Family models ....................25 Figure 3 - 5 CELEBRIS 486 PC Family Models Expansion slots ..............26 Figure 3 - 6 Main Logic Board Jumpers Locations ..................28 Figure 3 - 7 CELEBRIS 486 PC Family SIMM Sockets Locations..............
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Page 6: Preface
Preface The Digital CELEBRIS 486 Service Maintenance Manual is a troubleshooting guide that can be used for reference when servicing the CELEBRIS 486 line of PC’s. Digital Equipment Corporation reserves the right to make changes to the Digital CELEBRIS 486 series without notice. -
Page 7: Chapter 1 Product Description
Product Description Product Introduction Digital CELEBRIS 486 computers are high-performance personal computers equipped with the latest computing technology. They can be used as standalone computers, as client, or as servers in a network environment. Developed using the following state-of-the-art technology, theses computers are the most value packed low-profile (Slimline) desktop computers in their class. -
Page 8: Roduct Odels Nformation
Digital CELEBRIS 48 6 PC 6 PC Product Models Information EC = English, French, German, Italian and Spanish. ED = Danish, Dutch, English, Finnish, French (France excluded), Norwegian and Swedish. CELEBRIS 486 PC Family Models Product Model Memory Cache Options... -
Page 9: Chapter 2 System Utilities & Configuration
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Utilities & Configuration Utilities & Configuration Chapter 2 System Utilities & Configuration System Utilities The following sections provide detailed instructions on running the MS-DOS utilities contained on the supplied utilities diskettes. PHLASH.EXE All computers have BIOS software in a read-only, non-volatile memory (ROM) chip. -
Page 10: Creating A Crisis Recovery Diskette
Utilities & Configuration Utilities & Configuration Digital CELEBRIS 48 Digital CELEBRIS 48 6 PC 6 PC Before attempting to upgrade the flash BIOS, ensure that J24 is set correctly. To perform a flash BIOS upgrade, J24 must be set to enable. After the upgrade, make sure J24 is set back to disable as a security measure. -
Page 11: Upgrading The Computer Bios
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Utilities & Configuration Utilities & Configuration Upgrading the computer BIOS These utilities and video drivers enable to upgrade or restore the computer's BIOS and take full advantage of its enhanced video features. -
Page 12: Bios Setup Utility Options
Utilities & Configuration Utilities & Configuration Digital CELEBRIS 48 Digital CELEBRIS 48 6 PC 6 PC Helpful Hints ♦ Several keyboard function keys and numeric keypad keys are assigned to help selecting menus and options, changing option values, and displaying help information. These keys are displayed at the bottom of the main menu and from the General Help pop-up screen. -
Page 13: Boot Options
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Utilities & Configuration Utilities & Configuration Boot Options Menu Fields Settings Comments Boot sequence A: then C: Each time the computer boots, it will load the operating system from C: then A: the sequence selected. -
Page 14: Extended Features
Utilities & Configuration Utilities & Configuration Digital CELEBRIS 48 Digital CELEBRIS 48 6 PC 6 PC Extended Features Menu Fields Settings Comments Auto Turns Numlock on or off each time the computer boots. Numlock Keyboard 2/sec Sets the number of times a second to repeat a keystroke while holding auto-repeat 6/sec the key down. -
Page 15: Memory And Cache Options
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Utilities & Configuration Utilities & Configuration Memory and Cache Options Menu Fields Settings Comments Enabled Enables or disables the computer's external cache. External Disabled cache Write through Set’s the external cache to either write through or write back mode. -
Page 16: Security And Anti-Virus Options
Utilities & Configuration Utilities & Configuration Digital CELEBRIS 48 Digital CELEBRIS 48 6 PC 6 PC Advanced Chip Set Control (continued) Menu Fields Settings Comments Disabled Enables or disables the CPU to DRAM write buffer option. CPU to Enabled Enabling this option causes CPU data to be stored in buffers before DRAM write buffers writing to DRAM. -
Page 17: Power Options
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Utilities & Configuration Utilities & Configuration Power Options Menu Fields Settings Comments Sets the hard disk drive’s inactivity period required before standby Hard Disk 10 through 20 (motor off). timer Sets the monitor inactivity period required before standby (clear... -
Page 18: Chapter 3 Service Procedures
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Service Procedures Service Proced ures 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. -
Page 19: Recommended Tools
Service Procedures Service Procedures Digital CELEBRIS 4 Digital CELEBRIS 4 86 PC 86 PC Recommended Tools The following tools are needed for servicing Digital PC systems: ♦ Multimeter (4 1/2 digit) ♦ A philips screwdriver ♦ An antistatic wrist strap Other Materials Needed Cleaning agent should be an all purpose cleaner that is used in-house. -
Page 20: Eco/Fco Information
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Service Procedures Service Proced ures ECO/FCO Information BIOS Version Information Refer to the Digital DECpc Bulletin Board Support (telephone number: xx33 92960312) for the latest information on BIOS upgrades. MCS Logistics Engineering - Nijmegen... -
Page 21: Unlocking And Removing Cover
Service Procedures Service Procedures Digital CELEBRIS 4 Digital CELEBRIS 4 86 PC 86 PC Unlocking and Removing Cover WARNING You might injure yourself or damage the computer if you attempt to remove the cover before unplugging ac and monitor power cords. The computer's cover must be removed prior to installing any hardware option. -
Page 22: Computer Components
Riser card (two PCI & and one ISA or two ISA & one PCI). Rear internal drive bay (under power supply). Figure 3 - 4 CELEBRIS 486 PC Family models MCS Logistics Engineering - Nijmegen MCS Logistics Engineering - Nijmegen... -
Page 23: Expansion Slots
86 PC Expansion Slots The CELEBRIS 486 PC Family computer models contain six expansion slots for installing both Plug-and- Play and non-Plug-and-Play expansion boards. Four of the slots are located on the computer’s riser card. The remaining two “Personality” slots, located on the computer’s main logic board, are reserved for a dedicated low-profile PCI video adapter and a optional low-profile ISA board. -
Page 24: Main Logic Board Jumpers
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Service Procedures Service Proced ures 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 25: Main Logic Board Jumper Locations
Service Procedures Service Procedures Digital CELEBRIS 4 Digital CELEBRIS 4 86 PC 86 PC Main Logic Board Jumper Locations Figure 3 - 6 Main Logic Board Jumpers Locations MCS Logistics Engineering - Nijmegen MCS Logistics Engineering - Nijmegen... -
Page 26: Computer Memory Configurations
Computer Memory Configurations Adding more memory allows the computer to run larger, more complicated software and run it faster. The CELEBRIS 486 PC Family computer comes with at least 8 MB of memory. This amount can be increased up to 128 MB. -
Page 27: Simm Sockets Locations
Service Procedures Service Procedures Digital CELEBRIS 4 Digital CELEBRIS 4 86 PC 86 PC SIMM Sockets Locations Figure 3 - 7 CELEBRIS 486 PC Family SIMM Sockets Locations MCS Logistics Engineering - Nijmegen MCS Logistics Engineering - Nijmegen... -
Page 28: Opening The Device Bay & Power Supply Subassembly
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Service Procedures Service Proced ures Part Removal and Replacement Opening the Device Bay & Power Supply Subassembly Open the device bay & power supply subassembly in order to install, remove, and/or connect certain components and peripheral devices. -
Page 29: Removing The 3½-Inch Diskette Drive
Service Procedures Service Procedures Digital CELEBRIS 4 Digital CELEBRIS 4 86 PC 86 PC Removing the 3½-Inch Diskette Drive. To remove the 3½-inch diskette drive: Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove cover. Remove two screws securing the right side of diskette drive to chassis. -
Page 30: Removing The Main Logic Board
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Service Procedures Service Proced ures 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 cover. -
Page 31: Removing The Power Supply
Service Procedures Service Procedures Digital CELEBRIS 4 Digital CELEBRIS 4 86 PC 86 PC Removing the Power Supply To remove the power supply: Perform the steps necessary to open the device bay and power supply subassembly. Remove power supply, IDE, and diskette cabling from main logic board noting their proper orientation. -
Page 32: Removing The Riser Card & Bracket
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Service Procedures Service Proced ures Removing the Riser Card & Bracket To remove the riser card and bracket: Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove cover. -
Page 33: Procedures
Installation Procedures Installing a Higher Performance CPU The CELEBRIS 486 PC Family main logic board is equipped with an Intel Pentium Processor OverDrive Ready Socket (Socket 3 ZIF). This socket is capable of supporting faster Intel i486 processors as well as future Pentium OverDrive processors. -
Page 34: Installing External Cache Memory
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Service Procedures Service Proced ures Installing External Cache Memory CAUTION Installing external cache memory incorrectly might cause the computer to malfunction. The computer is equipped with a socket for installing a 256 KB external cache module. This module is designed to improve the performance of the installed CPU. -
Page 35: Replacement Procedures
Replacing the Computer Battery The CELEBRIS 486 PC battery runs the computer clock and retains setup information when it is turned off. If the computer fails to retain the correct date, time, or configuration settings when it is turned on, replace the computer’s battery. -
Page 36: Connecting Diskette And Ide Devices
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Service Procedures Service Proced ures Connecting Diskette and IDE Devices To connect diskette and IDE devices, perform the following: Connect supplied ribbon cable to appropriate device as shown. Make sure cable is connected with correct orientation. Most cables and sockets are keyed so they cannot be connected backwards. -
Page 37: Figure 3 - 17 Connecting Diskette And Ide Devices
Service Procedures Service Procedures Digital CELEBRIS 4 Digital CELEBRIS 4 86 PC 86 PC Connecting Diskette and IDE Devices (continued) Figure Legend Component Power Supply Power Connections Diskette Drive Connection IDE Drive Connection Diskette Drive Hard Disk Drive Optional Storage Devices Figure 3 - 17 Connecting diskette and IDE devices MCS Logistics Engineering - Nijmegen MCS Logistics Engineering - Nijmegen... -
Page 38: Chapter 4 Troubleshooting
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Troubleshooting Troubleshoo ting Chapter 4 Troubleshooting The following pages provide initial troubleshooting procedures and tables listing specific problems, probable causes, and recommended actions to take if the computer fails after configuring it or after installing optional hardware or software. -
Page 39: Beep Codes
Troubleshooting Troubleshooting Digital CELEBRIS 48 Digital CELEBRIS 48 6 PC 6 PC Beep Codes When POST finds an error and cannot display a message, the computer's speaker emits a series of beeps to indicate the error. During POST, if the video configuration fails or if an external ROM module fails a checksum test, then the computer beeps three times (one long beep, and two short beeps). - Page 40 Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Troubleshooting Troubleshoo ting POST and Boot Error Messages (continued) Message Description/Solution nnnn Cache SRAM Passed Where nnnn is the amount of computer cache (in kilobytes) that tested successfully. Diskette drive A error Run the BIOS SETUP UTILITY.
- Page 41 Troubleshooting Troubleshooting Digital CELEBRIS 48 Digital CELEBRIS 48 6 PC 6 PC POST and Boot Error Messages (continued) Message Description/Solution Real-time clock failed BIOS test. Real time clock error Replace the battery and run the BIOS SETUP UTILITY to restore previous configuration information.
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Page 42: Computer Troubleshooting
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Troubleshooting Troubleshoo ting Computer Troubleshooting Problem Possible Cause Action Main logic board failure. Replace main logic board. No response when the computer is Main logic board jumpers Set all appropriate jumpers (Refer to “Main logic incorrectly set. - Page 43 Troubleshooting Troubleshooting Digital CELEBRIS 48 Digital CELEBRIS 48 6 PC 6 PC Computer Troubleshooting (continued) Problem Possible Cause Action Computer battery has failed. Replace computer battery. Computer fails to retain setup information Computer does Operating system software is not Install the appropriate operating system. not boot from installed on the IDE hard disk drive.
- Page 44 Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Troubleshooting Troubleshoo ting Computer Troubleshooting (continued) Problem Possible Cause Action SCSI device jumpers incorrectly Refer to the supplied SCSI device kit installation Computer does set. instructions. not recognize an internal or SCSI cable not terminated.
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Page 45: Disk Drive Troubleshooting
Troubleshooting Troubleshooting Digital CELEBRIS 48 Digital CELEBRIS 48 6 PC 6 PC Disk Drive Troubleshooting Problem Possible Cause Action Incorrect disk drive jumper Refer to the supplied kit installation instructions. IDE/SCSI hard settings. disk drive cannot read or Loose or incorrectly installed Make sure all cables are correctly installed. -
Page 46: Monitor Troubleshooting
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Troubleshooting Troubleshoo ting Monitor Troubleshooting Problem Possible Cause Action Monitor is turned off. Turn on the monitor. Monitor power indicator is not No power at wall outlet. Use another outlet. Power indicator is defective. -
Page 47: Qaplus/Fe Error Messages
Troubleshooting Troubleshooting Digital CELEBRIS 48 Digital CELEBRIS 48 6 PC 6 PC 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. -
Page 48: Chapter 5 Device Mapping
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Device Mapp 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.). -
Page 49: Cpu Memory Address Map (Pc Compatibility Range)
Device Mapping Device Mapping Digital CELEBRIS 486 Digital CELEBRIS 486 PC CPU Memory Address Map (PC Compatibility Range) Address Range Size Function 512 KB Main memory 0000 to 7FFFF 80000 to 9FFFF 128 KB Main/PCI/ISA memory A0000 to BFFFF 128 KB... -
Page 50: Computer Interrupt Levels
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Device Mapp Device Mapping Computer Interrupt Levels Interrupt Number Interrupt Source Keyboard controller IRQ1 IRQ3 COM2 (if enabled) IRQ4 COM1 (if enabled) Diskette drive (if enabled) IRQ6 LPT1, LPT2, LPT3 (if enabled) -
Page 51: Chapter 6 Pass / Fail Criteria
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Device Mapp Device Mapping 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 52: Appendix A Service Notes
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Service Notes Service Notes Appendix A Service Notes Service Note 1 On all IDE Hard Disk Drives error on boot data corruption and loss of data. Problem: Make sure that the drive is set up correctly as follows. - Page 53 Device Mapping Device Mapping Digital CELEBRIS 486 Digital CELEBRIS 486 PC 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 ♦...
- Page 54 Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Service Notes Service Notes SUTRA::D6:[PUBLIC]. MCS Logistics Engineering - Nijmegen MCS Logistics Engineering - Nijmegen...
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Page 55: Appendix B Useful Information
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Useful Infor Useful Information mation Appendix B Useful Information Related Documentation Order Number Description. EK-A0832-RG CELEBRIS 466Quick reference Guide EK-A0815-SV Service Maintenance Manual Spares Catalogue ER-820WW-IA CELEBRIS 466/4100 Quick Setup Guide (English) -
Page 56: On-Line Bulletin Boards
Useful Information Useful Information Digital CELEBRIS 486 Digital CELEBRIS 486 PC 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 57: Document Feedback
Digital CELEBRIS 486 PC Digital CELEBRIS 486 PC Document Feedback Document Feed back Document Feedback If you have comments on the contents or layout of this document we highly appreciate your feedback. We will do our best to make this document a valuable support to your service efforts for Digital.
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