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Decstation 212LP/316/320SX Service Manual

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Decstation 212LP/316/320SX Service Manual DECstation 212LP/ 316SX/ 320SX Service Guide Order Number EK-PC44A-SV-002 Digital Equipment Corporation Second Edition, October 1990 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 may appear in this document. The software described in this document is furnished under a license and may be used or copied only in accordance with the terms of such license. No responsibility is assumed for the use or reliability of software on equipment that is not supplied by Digital Equipment Corporation or its affiliated companies. Restricted Rights: Use, duplication, or disclosure by the U. S. Government is subject to restrictions as set forth in subparagraph ( c ) ( 1 ) ( ii ) of the Rights in Technical Data and Computer Software clause at DFARS 252.227–7013. Copyright © Digital Equipment Corporation 1990 All Rights Reserved. Printed in U.S.A. FCC NOTICE: The equipment described in this manual has been certified to comply with the limits for a Class B computing device, pursuant to Subpart J of Part 15 of FCC Rules. Only peripherals (computer input/output devices, terminals, printers, etcetera) certified to comply with the Class B limits may be attached to this computer. Operation with noncertified peripherals may result in interference to radio and television reception. This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio and television reception. It has been type tested and found to comply with the limits for a Class B computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: – Reorient the receiving antenna. – Move the computer away from the receiver. – Plug the computer into a different outlet so that computer and receiver are on different branch circuits. If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user may find the following booklet prepared by the Federal Communications Commission helpful: How to Identify and Resolve Radio-TV Interference Problems. This booklet is available from the US Government Printing Office, Washington, DC 20402, Stock No. 004–000– 00398–5 The following are trademarks of Digital Equipment Corporation: DEC DIBOL UNIBUS DEC/CMS EduSystem VAX DEC/MMS IAS VAXcluster DECnet MASSBUS VMS DECsystem–10 PDP VT DECSYSTEM–20 PDT DECUS RSTS DECwriter RSX dt MS-DOS is a registered trademark of Microsoft Corporation. Velcro is a trademark of VELCRO USA Inc. IBM and IBM-PC/AT are registered trademarks of International Business Machines Corporation. Intel is a trademark of Intel Corporation. This document was prepared and published by Educational Services Development and Publishing, Digital Equipment Corporation. Contents About This Guide vii 1 Overview 1.1 Introduction ...................................... 1–1 1.2 DECstation Base System ............................ 1–2 1.3 DECstation Options ................................ 1–3 1.3.1 System Unit Layout .............................. 1–4 1.4 DECstation System Configurations .................... 1–4 1.4.1 DECstation 212LP Main Logic Board . ............... 1–6 1.4.2 DECstation 316SX Main Logic Board . ............... 1–6 1.4.3 DECstation 320SX Main Logic Board . ............... 1–6 1.4.4 Power Supply . ................................ 1–7 1.4.5 Monitors ....................................... 1–7 1.4.6 Enhanced Keyboards ............................. 1–9 1.4.6.1 101-Key Enhanced Keyboard ..................... 1–9 1.4.6.2 LK250 Keyboard .............................. 1–9 1.4.7 Math Coprocessor ................................ 1–10 2 Troubleshooting 2.1 Special Tools ..................................... 2–1 2.2 Diagnostics ....................................... 2–2 2.3 Normal Power Up . ................................ 2–3 2.4 Troubleshooting Procedures . ........................ 2–3 2.4.1 Getting Started . ................................ 2–4 2.4.2 No Power ...................................... 2–5 2.4.3 System Does Not Boot ............................ 2–6 2.4.4 System Boots . ................................ 2–6 iii iv Contents 2.5 Error Codes and Messages . ........................ 2–7 2.5.1 Power Up Beep Codes ............................ 2–7 2.5.2 Test Messages . ................................ 2–11 2.6 Troubleshooting by Symptom . ........................ 2–13 2.6.1 System Unit Problems ............................ 2–13 2.6.2 Disk Related Problems ............................ 2–16 2.6.3 Monitor Problems ................................ 2–17 2.7 Troubleshooting Problems Occurring During System Operation ........................................ 2–20 2.8 Using the System Utilities Diskette .................... 2–21 2.8.1 Running the Setup Program ....................... 2–21 3 FRU Replacement 3.1 Introduction ...................................... 3–1 3.1.1 Before Replacing FRUs . ........................ 3–5 3.2 Replacing FRUs . ................................ 3–5 3.2.1 Keyboard Replacement ............................ 3–8 3.2.2 Monitor Replacement............................. 3–8 3.2.3 Mouse Replacement .............................. 3–8 3.2.4 System Cover Removal ............................ 3–9 3.2.5 Opening the System Unit . ........................ 3–10 3.2.6 Option Board Replacement ........................ 3–12 3.2.7 Option Slot Printed Circuit Board Replacement . ....... 3–13 3.2.8 Speaker Replacement ............................. 3–15 3.2.9 Battery Replacement ............................. 3–15 3.2.10 Reset Button Removal ............................ 3–17 3.2.11 Single-In-Line Memory Module Replacement ........... 3–19 3.2.12 Math Coprocessor Replacement ..................... 3–22 3.2.13 Main Logic Board Replacement ..................... 3–26 3.2.14 Floppy Drive Replacement . ........................ 3–30 3.2.15 Replacing An Optional Floppy Drive . ............... 3–30 3.2.16 Replacing an Optional Hard Disk or Tape Drive . ....... 3–30 3.2.17 DECstation Power Supply Removal . ............... 3–32 3.3 Main Logic Board Jumpers . ........................ 3–34 3.3.1 212LP Main Logic Board Jumpers ................... 3–34 3.3.2 316SX Main Logic Board Jumpers ................... 3–36 Contents v 3.3.3 DECstation 316SX Main Logic Board Switch Settings .... 3–38 3.3.4 320SX Main Logic Board Jumpers ................... 3–40 3.3.5 DECstation 320SX Main Logic Board Switch Settings .... 3–42 A Power Consumption B Peripheral Interface Index Figures 1–1 DECstation Personal Computer ....................... 1–1 1–2 System Unit Layout ................................ 1–4 3–1 Exploded View of DECstation Chassis . ............... 3–6 3–2 Exploded View of DECstation Main Logic Board and Options 3–7 3–3 Removing the DECstation System Cover . ............... 3–9 3–4 Opening the DECstation System Unit . ............... 3–11 3–5 Removing the Bus Adapter Board ..................... 3–14 3–6 Removing the DECstation 212LP Battery ............... 3–16 3–7 Removing the DECstation 316SX/ 320SX Battery . ....... 3–17 3–8 Removing the Reset Button . ........................ 3–18 3–9 Removing and Replacing the 212LP SIMM .............. 3–20 3–10 Removing and Replacing the 316SX/320SX SIMM . ....... 3–21 3–11 Replacing the 212LP Math Coprocessor . ............... 3–23 3–12 Replacing the 316SX Math Coprocessor . ............... 3–24 3–13 320SX Math Coprocessor Replacement . ............... 3–25 3–14 Removing the 212LP Main Logic Board . ............... 3–27 3–15 Removing the 316SX Main Logic Board . ............... 3–28 3–16 Removing the 320SX Main Logic Board . ............... 3–29 3–17 Replacing the Floppy Disk Drive ...................... 3–31 3–18 Removing the DECstation Power Supply . ............... 3–33 3–19 212LP Main Logic Board Jumper Locations .............. 3–34 3–20 316SX Main Logic Board Jumper Locations .............. 3–36 3–21 DECstation 316SX Main Logic Board Switch Location ...... 3–38 vi Contents 3–22 320SX Main Logic Board Jumper Locations .............. 3–40 3–23 DECstation 320SX Main Logic Board Switch Location ...... 3–42 Tables 1–1 Base System Configurations . ........................ 1–5 1–2 Monitors . ........................................ 1–7 1–3 Math Coprocessors . ................................ 1–10 2–1 Troubleshooting Tools ............................... 2–2 2–2 Primary Beep Codes ................................ 2–8 2–3 Secondary Beep Codes .............................. 2–9 2–4 BIOS Error Messages ............................... 2–11 2–5 System Unit Troubleshooting Procedures . ............... 2–13 2–6 Hard Disk and Diskette Drive Troubleshooting Procedures . 2–16 2–7 Monitor Troubleshooting Procedures ................... 2–17 3–1 DECstation Standard Field Replaceable Units ........... 3–1 3–2 DECstation Optional Field Replaceable Units ............ 3–2 3–3 212LP Main Logic Board Jumper Settings ..............
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