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Digital Equipment DECstation 212LP Service Manual

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DECstation
212
/ 316
/ 320
LP
SX
SX
Service Guide
Order Number EK-PC44A-SV-002
Digital Equipment Corporation

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Summary of Contents for Digital Equipment DECstation 212LP

  • Page 1 DECstation / 316 / 320 Service Guide Order Number EK-PC44A-SV-002 Digital Equipment Corporation...
  • Page 2 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.
  • Page 3 The following are trademarks of Digital Equipment Corporation: DIBOL UNIBUS DEC/CMS EduSystem DEC/MMS VAXcluster DECnet MASSBUS DECsystem–10 DECSYSTEM–20 DECUS RSTS DECwriter 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.

  • Page 4: Table Of Contents

    Contents About This Guide Overview Introduction ........1–1 DECstation Base System .
  • Page 5 iv Contents Error Codes and Messages ......2–7 2.5.1 Power Up Beep Codes ......2–7 2.5.2 Test Messages .
  • Page 6 Contents v 3.3.3 DECstation 316 Main Logic Board Switch Settings ..3–38 3.3.4 Main Logic Board Jumpers ....3–40 3.3.5 DECstation 320 Main Logic Board Switch Settings .
  • Page 7 vi Contents 3–22 320 Main Logic Board Jumper Locations ....3–40 3–23 DECstation 320 Main Logic Board Switch Location ..3–42 Tables 1–1 Base System Configurations .

  • Page 8: About This Guide

    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.

  • Page 9: Ordering Parts

    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 Press and hold while you Ctrl Alt Del Ctrl...

  • Page 10: Related Documentation

    DECconnect System Installation and EK-DECSY-VG Verification Guide Digital personnel may order documents with part numbers beginning with either ER or EK from: Digital Equipment Corporation 444 Whitney Street Northboro, MA 01532 Attn: Publishing and Circulation Services (NRO2-2) Order Processing Section On-line orders can be sent ALL-IN-1 mail to Order @NRO or VMS mail to NEST::ORDER.
  • Page 11 About This Guide Digital personnel may order documents with part numbers beginning with AA from: Digital Equipment Corporation Digital Drive Westminster MA 01473-0471 Attn: Attention: Order Administration Digital self-maintenance customers may order documents with part numbers beginning with either EK, ER, or AA by mail or...

  • Page 12: Overview

    Overview 1.1 Introduction The DECstation (Figure 1–1) is a desktop computer. It can be used as a standalone personal computer or as a node on a network to a VAX computer or another DECstation with network server software. The DECstation runs Digital and other industry- standard applications.

  • Page 13: Decstation Base System

    1–2 Overview As a node on a Personal Computing System Architecture (PCSA) network, the DECstation is the user’s interface with the applications and services that the PCSA family of products provides. As part of a network, the DECstation communicates with other computers on the network and shares the various resources and services offered by Digital computers and servers.

  • Page 14: Decstation Options

    Overview 1–3 1.3 DECstation Options The following are options available for the DECstation base system: • Color or monochrome VGA analog monitor • 40, 80, 170, or 320 Mbyte SCSI hard disk drive • 150 Mbyte SCSI Tape cartridge system •...

  • Page 15: System Unit Layout

    1–4 Overview 1.3.1 System Unit Layout Figure 1–2 shows the location of both standard and optional equipment within the system unit. Standard equipment (the equipment that is included in the base system) is represented by solid lines. Optional equipment is represented by dotted lines. LJ-1712 Figure 1–2 System Unit Layout...

  • Page 16: Base System Configurations

    Overview 1–5 Additionally, customers can order one of several packaged systems which offer optional system memory configurations, mass storage devices and video adapters installed at the factory. The base system configurations are listed in Table 1–1. The packaged systems are listed in Table 1–2. Table 1–1 Base System Configurations Model Number...

  • Page 17: Decstation 212 Lp Main Logic Board

    1–6 Overview Table 1–1 (Cont.) Base System Configurations Model Number Description PC443-A3 Same as PC443-A2, but with the power supply factory set at 240 Vac, 50 Hz. 1.4.1 DECstation 212 Main Logic Board The DECstation 212 main logic board contains a 12 MHz Intel 80286 CPU microprocessor, a socket for an optional Intel 80287 math coprocessor, floppy disk drive controller, serial and parallel ports, PS/2 compatible mouse port, IDE drive connector, 16-bit...

  • Page 18: Power Supply

    Overview 1–7 1.4.4 Power Supply The DECstation is supplied with a 100 watt power supply that includes an auxiliary ac power output (IEC) connector. The power supply is switch selectable between either 115 Vac, 60 Hz or 230 Vac, 50/60 Hz power input. 1.4.5 Monitors The DECstation supports both color and monochrome VGA analog monitors.
  • Page 19 1–8 Overview Table 1–2 (Cont.) Monitors Model Number Part Number Description PC4XV-A5 30-32318-01 VGA monochromatic 14" international version, 120 Vac 60 Hz, with 640 x 480 resolution, South Hemisphere (IEC plug) PC4XV-A6 30-33966-01 VGA monochromatic RGB 14" international version, 240 Vac 50 Hz, with 640 x 480 resolution, North Hemisphere (IEC plug) PC4XV-A7...

  • Page 20: Enhanced Keyboards

    Overview 1–9 Table 1–2 (Cont.) Monitors Model Number Part Number Description PC4XV-B6 30-33968-01 SVGA color RGB 14" international version, 240 Vac 50 Hz, with 1024 x 768 resolution, North Hemisphere (IEC plug) PC4XV-B7 30-33969-01 SVGA color RGB 14" international version, 240 Vac 50 Hz, with 1024 x 768 resolution, South Hemisphere (IEC plug) 1.4.6 Enhanced Keyboards...

  • Page 21: Math Coprocessor

    1–10 Overview 1.4.7 Math Coprocessor The math coprocessors listed in Table 1–3 plug into the main logic board and allow each DECstation to process numeric data faster. Table 1–3 Math Coprocessors Model Number Description PC44P-AA 10 MHz optional Intel 80287 coprocessor for the DECstation 212 PC46P-BB 16 MHz optional Intel 80387 coprocessor for the...

  • Page 22: Troubleshooting

    Troubleshooting This chapter provides troubleshooting instructions for the DECstation systems. It is divided into the following sections: • Special tools • Diagnostics • Normal power up • Troubleshooting procedures • Error codes and how to use them • Troubleshooting by symptom •...

  • Page 23: Diagnostics

    2–2 Troubleshooting Table 2–1 Troubleshooting Tools Tool Part Number Definition Diagnose 29-27462-01 These standalone diagnostics Diagnostics are available separately. For information about using these diagnostics, refer to the accompanying manual. Tri-wrap FD-10164-00 This triple connector consists Loopback of a male 25-pin parallel Connector loopback connector, a female 25-pin serial loopback...

  • Page 24: Normal Power Up

    Troubleshooting 2–3 2.3 Normal Power Up In a normal system power up the following takes place. 1. Power to the monitor and system unit is turned on. Both power indicators are on. 2. The system executes its power-up tests, displays the BIOS ROM version, assorted copyright information, and the memory size.

  • Page 25: Getting Started

    2–4 Troubleshooting 2.4.1 Getting Started The following steps prepare you for troubleshooting a DECstation. 1. Ask the customer to describe the problem. You need to find out: — When the problem started — If any new hardware options were added to the system around the time the problem started and if the options are Digital certified or third party —...

  • Page 26: No Power

    Troubleshooting 2–5 — If the system powers up and boots see Section 2.4.4, System Boots. 2.4.2 No Power This procedure is to help determine the cause of the problem when the DECstation does not power up. Before starting this procedure be sure you have done the steps in Section 2.4.1.

  • Page 27: System Does Not Boot

    2–6 Troubleshooting 6. If the system powers up and does not boot refer to Section 2.4.3. 7. If the system powers up and boots refer to Section 2.4.4. 2.4.3 System Does Not Boot This procedure is to help determine why the DECstation does not boot.

  • Page 28: Error Codes And Messages

    Troubleshooting 2–7 1. Determine what the failure is. Refer to Section 2.5 for a list of possible error messages. If there are no error messages refer to Section 2.6 for a list of symptoms and possible causes. 2. Run the Diagnose diagnostics. 3.

  • Page 29: Primary Beep Codes

    2–8 Troubleshooting Table 2–2 Primary Beep Codes Possible Beep Code Problem Corrective Action Two short Keyboard Be sure the keyboard cable is firmly beeps failure connected. Hard disk Be sure the drive cables are firmly failure connected and all drive and adapter jumpers are set correctly.

  • Page 30: Secondary Beep Codes

    Troubleshooting 2–9 When several bursts of beeps are generated, listen carefully and remember the numeric beep code pattern. This pattern establishes the secondary level of beep codes. Table 2–3 lists the secondary beep codes and the test in-progress or test failure that corresponds to the numeric beep code pattern.
  • Page 31 2–10 Troubleshooting Table 2–3 (Cont.) Secondary Beep Codes Beep Code Description of Test or Failure 2-2-4 1st 64K RAM chip or data line failure - bit 7 2-3-1 1st 64K RAM chip or data line failure - bit 8 2-3-2 1st 64K RAM chip or data line failure - bit 9 2-3-3 1st 64K RAM chip or data line failure - bit A...

  • Page 32: Test Messages

    Troubleshooting 2–11 2.5.2 Test Messages After screen initialization and verification, the built-in diagnostics send non-fatal error messages to video memory and the system displays the messages on the monitor. Table 2–4 lists the BIOS error numbers and the corresponding error messages that displays on the screen.
  • Page 33 2–12 Troubleshooting Table 2–4 (Cont.) BIOS Error Messages Error Number Error Message Time-of-day not set - please run SETUP program Keyboard is locked - please unlock Optional ROM bad checksum = xx Strike the F1 key to continue Diskette read failure - Not a boot diskette - No boot device available - Hard disk read failure -...

  • Page 34: Troubleshooting By Symptom

    Troubleshooting 2–13 2.6 Troubleshooting by Symptom This section describes causes and corrective actions for minor system problems that you can fix. The troubleshooting procedures are separated into system unit, hard disk and diskette drives, monitor, and pointing device problems. 2.6.1 System Unit Problems Table 2–5 lists some common problems with the system unit, possible causes, and suggested corrective actions.
  • Page 35 2–14 Troubleshooting Table 2–5 (Cont.) System Unit Troubleshooting Procedures Problem Possible Cause Corrective Action Main logic board Make sure the VGA failure. jumper is enabled on the main logic board. If so, replace the main logic board. An Ethernet network Using a diskette Press Ctrl Alt Del...
  • Page 36 Troubleshooting 2–15 Table 2–5 (Cont.) System Unit Troubleshooting Procedures Problem Possible Cause Corrective Action System does not boot Diskette is not in the Insert a diskette from the diskette diskette drive. containing bootable drive. system software. Drive switch is set Make sure the drive incorrectly.

  • Page 37: Disk Related Problems

    2–16 Troubleshooting 2.6.2 Disk Related Problems Table 2–6 lists some common disk related problems, possible causes, and suggested corrective actions. If the corrective action does not work, run the Diagnose diagnostics to further isolate the problem and then replace the failing FRU. Table 2–6 Hard Disk and Diskette Drive Troubleshooting Procedures Problem...

  • Page 38: Monitor Problems

    Troubleshooting 2–17 Table 2–6 (Cont.) Hard Disk and Diskette Drive Troubleshooting Procedures Problem Possible Cause Corrective Action Diskette is worn or Try another damaged. diskette. 2.6.3 Monitor Problems Table 2–7 lists some common monitor problems, possible causes, and suggested corrective actions. If the corrective action does not work and it is possible to run the Diagnose diagnostics, use them to further isolate the problem and then replace the failing FRU.
  • Page 39 2–18 Troubleshooting Table 2–7 (Cont.) Monitor Troubleshooting Procedures Problem Possible Cause Corrective Action Main logic board Replace the monitor. failure. If that doesn’t fix the problem make sure the VGA jumper is enabled on the main logic board. If it is enabled, replace the main logic board.
  • Page 40 Troubleshooting 2–19 Table 2–7 (Cont.) Monitor Troubleshooting Procedures Problem Possible Cause Corrective Action Screen display Monitor cable Straighten pins or distorted, rolling, connector pins bent replace the monitor. flickering, or wrong or broken. or uneven color. Electromagnetic Move any interference exists. electromechanical device away from the monitor or move the...

  • Page 41: Troubleshooting Problems Occurring During System Operation

    2–20 Troubleshooting 2.7 Troubleshooting Problems Occurring During System Operation Sometimes problems occur during system operation. Use the following list to help isolate a problem to a specific subsystem by determining how or when the problem occurs. The problem occurs during diskette drive access. •...

  • Page 42: Using The System Utilities Diskette

    Troubleshooting 2–21 The problem seems to be heat related. • Make sure there is sufficient air flow around the system. • The system unit may be clogged with dust. 2.8 Using the System Utilities Diskette The menu driven System Utilities diskette (shipped with the system and required as a Customer Service tool) must be used when options are added to the system.
  • Page 43 2–22 Troubleshooting • Expansion memory size (displayed on the screen at power-up). • Primary video adapter type (VGA). • CPU and BUS clock speeds. CPU speed is the CPU processing speed, and BUS speed is the I/O expansion bus transmission speed. The Setup utility is run as follows: 1.

  • Page 44: Fru Replacement

    FRU Replacement 3.1 Introduction This chapter contains procedures for removing and replacing each DECstation field replaceable unit (FRU). To install many of the FRUs, perform the reverse of the procedure when so noted. Only qualified service technicians should remove and replace FRUs. Use only Digital supplied spares.

  • Page 45: Sx / 320 Sx

    3–2 FRU Replacement Table 3–1 (Cont.) DECstation Standard Field Replaceable Units Digital Part Number Actuator with LED assembly 29-28116-01 Reset button assembly 29-28117-01 DECstation 212 battery and real time clock 29-28242-01 DECstation 316 /320 battery 29-27439-01 Floppy drive ribbon cable assembly 29-28108-01 Floppy drive, 3.5 inch, 1.44 Mbyte 30-30942-01...
  • Page 46 FRU Replacement 3–3 Table 3–2 (Cont.) DECstation Optional Field Replaceable Units Digital Part Number 14" Color monitor 120V South Hemisphere 30-32314-01 14" Color monitor 240V North Hemisphere 30-32315-01 14" Color monitor 240V South Hemisphere 30-32316-01 14" Color monitor 120V North Hemisphere 30-32317-01 14"...
  • Page 47 3–4 FRU Replacement Table 3–2 (Cont.) DECstation Optional Field Replaceable Units Digital Part Number IDE hard disk drive, 105 Mbyte, 3.5" 30-34429-01 IDE hard disk drive, 120 Mbyte, 3.5" 30-32344-01 IDE dual drive ribbon cable assembly 29-27912-01 2400 BPS integral modem 30-31072-01 1200 BPS integral modem 30-31073-01...

  • Page 48: Before Replacing Frus

    FRU Replacement 3–5 3.1.1 Before Replacing FRUs The following criteria apply when removing or installing DECstation FRUs. CAUTION After you turn power to the system off, do not disconnect the power cord from the system unit or wall outlet for at least 20 seconds.

  • Page 49: Exploded View Of Decstation Chassis

    3–6 FRU Replacement New Illustration LJ-1711 Figure 3–1 Exploded View of DECstation Chassis...

  • Page 50: Exploded View Of Decstation Main Logic Board And Options

    FRU Replacement 3–7 New Illustration LJ-1710 Figure 3–2 Exploded View of DECstation Main Logic Board and Options...

  • Page 51: Keyboard Replacement

    3–8 FRU Replacement 3.2.1 Keyboard Replacement Replace the keyboard as follows: 1. Turn power to the system unit and monitor off. 2. Disconnect the keyboard cable from the system unit. 3. Connect the cable from the new keyboard to the system unit. 4.

  • Page 52: System Cover Removal

    FRU Replacement 3–9 3.2.4 System Cover Removal Remove the system cover as follows: 1. Turn power to the system unit and monitor off. CAUTION To avoid damage to the hard disk, do not move or perform the following procedure for at least 20 seconds after you turn power to the system off.

  • Page 53: Opening The System Unit

    3–10 FRU Replacement 3.2.5 Opening the System Unit Open the system unit as follows (Figure 3–4): 1. Using the key, unlock the system box. 2. Remove the two shake-proof fittings that secure the system unit option cover and carriage (metal fold-outs). 3.

  • Page 54: Opening The Decstation System Unit

    FRU Replacement 3–11 New Illustration LJ-1708 Figure 3–4 Opening the DECstation System Unit...

  • Page 55: Option Board Replacement

    3–12 FRU Replacement 3.2.6 Option Board Replacement The procedure for replacing an option board in the DECstation is similar for the different options in the system. 1. Remove the cover (Section 3.2.4) and open the system unit (Section 3.2.5). 2. Note the position of all cables (if any) connected to the option board and disconnect them.

  • Page 56: Option Slot Printed Circuit Board Replacement

    FRU Replacement 3–13 3.2.7 Option Slot Printed Circuit Board Replacement Remove the option slot printed circuit board (PCB) as follows: 1. Remove the cover (Section 3.2.4) and open the system unit (Section 3.2.5). 2. Remove the two screws that secure the chassis support to the system unit, one in the front of the system unit and one in the rear of the chassis support (Figure 3–5).

  • Page 57: Removing The Bus Adapter Board

    3–14 FRU Replacement New Illustration LJ-1707 Figure 3–5 Removing the Bus Adapter Board...

  • Page 58: Speaker Replacement

    FRU Replacement 3–15 3.2.8 Speaker Replacement Replace the speaker as follows: 1. Remove the cover (Section 3.2.4) and open the system unit (Section 3.2.5). 2. Disconnect the speaker cable from the main logic board (Figure 3–1). 3. Remove two 5/16-inch nuts and lock washers securing the speaker to the bottom of the chassis (Figure 3–1).

  • Page 59: Removing The Decstation

    3–16 FRU Replacement New Illustration LJ-1706 Figure 3–6 Removing the DECstation 212 Battery...

  • Page 60: Reset Button Removal

    FRU Replacement 3–17 New Illustration LJ-1705 Figure 3–7 Removing the DECstation 316 / 320 Battery 3.2.10 Reset Button Removal Remove the reset button as follows: 1. Remove the cover (Section 3.2.4) and open the system unit (Section 3.2.5). 2. Remove all option boards from the system unit (if any) (Section 3.2.6).
  • Page 61 3–18 FRU Replacement 3. Disconnect the reset button cable from the main logic board (Figure 3–8). 4. Depress the option board card guide clip (Figure 3–8). 5. Slide the card guide to the left and remove it from the system unit (Figure 3–8).

  • Page 62: Single-In-Line Memory Module Replacement

    FRU Replacement 3–19 3.2.11 Single-In-Line Memory Module Replacement Replace the Single-In-Line Memory Modules (SIMMs) as follows: 1. Remove the cover (Section 3.2.4) and open the system unit (Section 3.2.5). 2. Remove any option boards that might obstruct the removal and installation of SIMMs. 3.

  • Page 63: Removing And Replacing The

    3–20 FRU Replacement Insert version LJ-1703 Figure 3–9 Removing and Replacing the 212 SIMM...
  • Page 64 FRU Replacement 3–21 Insert version LJ-1784 Figure 3–10 Removing and Replacing the 316 /320 SIMM...

  • Page 65: Math Coprocessor Replacement

    3–22 FRU Replacement 3.2.12 Math Coprocessor Replacement Replace the math coprocessor as follows: 1. Remove the cover (Section 3.2.4) and open the system unit (Section 3.2.5). 2. Locate the math coprocessor on the main logic board (Figure 3–11 and Figure 3–12). 3.

  • Page 66: Replacing The

    FRU Replacement 3–23 Insert version LJ-1701 Figure 3–11 Replacing the 212 Math Coprocessor...
  • Page 67 3–24 FRU Replacement New Illustration LJ-1700 Figure 3–12 Replacing the 316 Math Coprocessor...

  • Page 68: Math Coprocessor

    FRU Replacement 3–25 New Illustration LJ-1785 Figure 3–13 Math Coprocessor Replacement...

  • Page 69: Main Logic Board Replacement

    3–26 FRU Replacement 3.2.13 Main Logic Board Replacement Replace the main logic board as follows: 1. Remove the cover (Section 3.2.4) and open the system unit (Section 3.2.5). 2. Remove all option boards and their cables, if any, (Section 3.2.6). 3.

  • Page 70: Removing The 212 Lp

    FRU Replacement 3–27 12. Replace the main logic board by reversing the steps used to remove the board. NOTE There is a mylar insulator under the main logic board. Make sure it is installed and in position when replacing the main logic board (Figure 3–14 and Figure 3–15). New Illustration LJ-1699 Figure 3–14 Removing the 212...
  • Page 71 3–28 FRU Replacement New Illustration LJ-1698 Figure 3–15 Removing the 316 Main Logic Board...
  • Page 72 FRU Replacement 3–29 New Illustration LJ-1786 Figure 3–16 Removing the 320 Main Logic Board...

  • Page 73: Floppy Drive Replacement

    3–30 FRU Replacement 3.2.14 Floppy Drive Replacement Replace the floppy drive as follows (Figure 3–17): 1. Remove the cover (Section 3.2.4) and open the system unit (Section 3.2.5). 2. Remove the ribbon cable from the back of the drive. 3. Remove the three mounting screws that hold the drive in place.
  • Page 74 FRU Replacement 3–31 New Illustration LJ-1697 Figure 3–17 Replacing the Floppy Disk Drive...

  • Page 75: Decstation Power Supply Removal

    3–32 FRU Replacement 3.2.17 DECstation Power Supply Removal Remove the DECstation power supply as follows (Figure 3–18): 1. Remove the cover (Section 3.2.4) and open the system unit (Section 3.2.5). 2. Remove the ribbon cable from the back of the drive. 3.

  • Page 76: Removing The Decstation Power Supply

    FRU Replacement 3–33 New Illustration LJ-1696 Figure 3–18 Removing the DECstation Power Supply...

  • Page 77: Main Logic Board Jumpers

    3–34 FRU Replacement 3.3 Main Logic Board Jumpers 3.3.1 212 Main Logic Board Jumpers Figure 3–19 shows the location of the jumpers on the main logic board. Table 3–3 describes the jumper configurations and provides a recommended default setting for the jumpers. New Illustration LJ-1695 Figure 3–19 Main Logic Board Jumper Locations...

  • Page 78: Main Logic Board Jumpers

    FRU Replacement 3–35 Table 3–3 212 Main Logic Board Jumper Settings Feature Description Jumper Setting Video interrupt Standard E12 and E13, No connection IRQ9 E12 and E13, installed On-board video Enabled E15 and E16, installed Disabled E14 and E15, installed BIOS ROM type 4 Mbyte or 8 Mbyte E10 and E11, installed...

  • Page 79: 316 Sx Main Logic Board Jumpers

    3–36 FRU Replacement 3.3.2 316 Main Logic Board Jumpers Figure 3–20 shows the location of the jumpers on the main logic board. Table 3–4 describes the jumper configurations and provides a recommended default setting for the jumpers. New Illustration LJ-1694 Figure 3–20 Main Logic Board Jumper Locations...

  • Page 80: Math Coprocessor

    FRU Replacement 3–37 Table 3–4 316 Main Logic Board Jumper Settings Feature Description Jumper Setting Math 80387 installed E30 and E31, installed coprocessor 80387 not installed E31 and E32, not installed BIOS ROM type 128 Kbyte (16 KB) E2 and E3, installed E5 and E6, installed 256 Kbyte (32 KB) E1 and E2, installed...

  • Page 81: Decstation 316 Sx

    3–38 FRU Replacement 3.3.3 DECstation 316 Main Logic Board Switch Settings Figure 3–21 shows the location of the switch on the main logic board. Table 3–5 describes the switch configurations and provides a recommended default setting for each switch. New Illustration LJ-1693 Figure 3–21 DECstation 316 Main Logic Board Switch...

  • Page 82: Main Logic Board Switch Settings

    FRU Replacement 3–39 Table 3–5 DECstation 316 Main Logic Board Switch Settings Switch Feature Description Setting Parallel Port Enabled SW1, on Enable (SW1) Disabled SW1, off Parallel Port LPT1= 378-37F HEX SW2, on Address(SW2) LPT2= 278-27F HEX SW2, off Serial Port Enabled SW3, on Enable (SW3)
  • Page 83 3–40 FRU Replacement 3.3.4 320 Main Logic Board Jumpers Figure 3–22 shows the location of the jumpers on the main logic board. Table 3–6 describes the jumper configurations and provides a recommended default setting for the jumpers. New Illustration LJ-1787 Figure 3–22 Main Logic Board Jumper Locations...
  • Page 84 FRU Replacement 3–41 Table 3–6 320 Main Logic Board Jumper Settings Feature Description Jumper Setting BIOS ROM Type 256 Kbyte E5 and E6, installed (32 KBx8) E1 and E2, installed Reserved for Reserved for future Reserved for future use future use Parallel port IRQ5 E13 and E14, installed...

  • Page 85: Decstation 320 Sx

    3–42 FRU Replacement 3.3.5 DECstation 320 Main Logic Board Switch Settings Figure 3–23 shows the location of the switch on the main logic board. Table 3–7 describes the switch configurations and provides a recommended default setting for each switch. New Illustration LJ-1788 Figure 3–23 DECstation 320 Main Logic Board Switch...

  • Page 86: Main Logic Board Switch Settings

    FRU Replacement 3–43 Table 3–7 DECstation 320 Main Logic Board Switch Settings Switch Feature Description Setting Parallel port Enabled SW1, on Disabled SW1, off Parallel port LPT1= 378-37F HEX SW2, on address LPT2= 278-27F HEX SW2, off Serial port Enabled SW3, on Disabled SW3, off...

  • Page 87: Power Consumption

    Power Consumption The following table lists the power consumption for the DECstation base systems. NOTE The reserve current row indicates the amount of current available for options and may be distributed between the other slots as needed. Table A–1 DECstation Base System Power Consumption +5 Volts Volts Volts...

  • Page 88: Peripheral Interface

    Peripheral Interface The following tables list the pin assignments and function of each peripheral interface connector on the rear panel of the DECstation systems. Table B–1 Parallel I/O Port Connector Pin Number Function Strobe Data bit 0 Data bit 1 Data bit 2 Data bit 3 Data bit 4...

  • Page 89: Rs-232C Serial Port Connector

    B–2 Peripheral Interface Table B–1 (Cont.) Parallel I/O Port Connector Pin Number Function Select in 18 to 25 Ground Table B–2 RS-232C Serial Port Connector Pin Number Function Carrier detect Receive data Transmit data Data terminal ready Signal ground Data set ready Request to send Clear to send Ring indicator...

  • Page 90: Video Port Connector

    Peripheral Interface B–3 Table B–4 Video Port Connector Pin Number Function Red video Green video Blue video Monitor ID bit 2 (not used) Ground Red return (ground) Green return (ground) Blue return (ground) Key (no pin) Sync return (ground) Monitor ID bit 0 (not used) Monitor ID bit 1 (not used) Horizontal sync Vertical Sync...

This manual is also suitable for:

Decstation 316sxDecstation 320sx

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