Digital Equipment DECstation 212LP User manual

DECstation

212LP/316SX/320SX

ServiceGuide

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.

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

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 ............... 3–35

3–4 316SX Main Logic Board Jumper Settings ............... 3–37

3–5 DECstation 316SX Main Logic Board Switch Settings ...... 3–39

3–6 320SX Main Logic Board Jumper Settings ............... 3–41

3–7 DECstation 320SX Main Logic Board Switch Settings ...... 3–43

A–1 DECstation Base System Power Consumption ............ A–1

B–1 Parallel I/O Port Connector . . ........................ B–1

B–2 RS-232C Serial Port Connector ....................... B–2

B–3 Keyboard and Mouse Connectors ...................... B–2

B–4 Video Port Connector ............................... B–3

AboutThisGuide

This service guide is designed to help you diagnose and repair

the DECstation 212LP, DECstation 316SX and DECstation

320SX personal computers. This guide contains information on

servicing the base system only. Speciﬁc information on installing,

replacing, and conﬁguring options is covered in the individual

option installation guides supplied with those products and is

available to Customer Service personnel in a kit.

Guide Organization

The guide is organized as follows:

• Chapter 1 provides an overview of the DECstation systems.

• Chapter 2 details troubleshooting instructions.

• Chapter 3 contains procedures for removing and replacing

ﬁeld replaceable units.

For information about network troubleshooting, refer to the PCSA

Network Troubleshooting Guide. For additional information about

PC architecture and the Digital Ethernet Personal Computer Bus

Adapter (DEPCA) and DEC EtherWORKS option boards, refer to

the appropriate Service Guides.

Intended Audience

The procedures in this guide are for service technicians trained

only by Digital Equipment Corporation.

vii

viii About This Guide

Conventions

This document uses the following conventions:

Convention Meaning

Warning Provides information to prevent

personal injury

Caution Provides information to prevent

damage to equipment

Note Provides general information you

should be aware of

Ctrl Alt Del Press and hold Ctrl while you

press both Alt and Del. Control

key sequences have special

functions.

Strike the F1 key What the screen displays as a

prompt or an instruction is shown

in monospaced type.

Throughout this guide, DECstation refers to the DECstation

212LP, DECstation 316SX, and the DECstation 320SX. When

information applies to a speciﬁc DECstation, the full title is used.

The computer industry recognizes two open architectures as

industry standards: the IBM-PC/AT bus structure and the

Microsoft disk operating system, MS-DOS. The term industry-

standard refers to compatibility with these architectures. Support

for MS-DOS requires a deﬁned set of ROM-BIOS (read-only

memory basic I/O system services) which the DECstation offers.

Ordering Parts

Customers who maintain their own equipment can order spare

parts by either phone or mail, or through any Digital sales ofﬁce.

To order parts by phone, call 1-800-DIGITAL from 8:30 am to 8:00

pm (Eastern Standard Time).

To order parts by mail, send a purchase order to Digital

Equipment Corporation, P.O. Box CS2008, Nashua NH 03061.

About This Guide ix

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