Sun Microsystems SPARC classic Service Manual
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Sun Microsystems SPARC classic Service Manual

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SPARCclassic/SPARCclassic
X/SPARCstation LX Service
Manual
Sun Microsystems Computer Company
A Sun Microsystems, Inc. Business
901 San Antonio Road Palo Alto, CA 94303-4900 USA
650 960-1300
fax 650 969-9131
Part No.: 801-2176-13
Revision A, November 1993
Send comments about this document to: docfeedback@sun.com

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  • Page 1 X/SPARCstation LX Service Manual Sun Microsystems Computer Company A Sun Microsystems, Inc. Business 901 San Antonio Road Palo Alto, CA 94303-4900 USA 650 960-1300 fax 650 969-9131 Part No.: 801-2176-13 Revision A, November 1993 Send comments about this document to: docfeedback@sun.com...
  • Page 2 This product or document is protected by copyright and distributed under licenses restricting its use, copying, distribution, and decompilation. No part of this product or document may be reproduced in any form by any means without prior written authorization of Sun and its licensors, if any.

  • Page 3: Table Of Contents

    Contents Preface xv Product Description 1-1 System Unit 1-1 1.1.1 Main Logic Board 1-4 1.1.2 Memory Modules 1-5 1.1.2.1 Video SIMM 1-5 1.1.2.2 SBus Cards 1-5 1.1.3 Nonvolatile RAM (NVRAM) 1-6 1.1.4 Internal Hard Disk Drive 1-7 1.1.5 Internal Diskette Drive 1-7 1.1.6 Power Supply 1-7 Monitors, Keyboard, and Mouse 1-7...
  • Page 4 Power-On Self-Test 2-8 Selected On-Board Tests 2-8 Sundiag System Exerciser 2-9 Forth Toolkit 2-9 SunDiagnostic Executive 2-10 Power-On Self-Test (POST) 3-1 Power-On Self-Test (POST) 3-1 Normal Mode 3-4 Full Diagnostic Mode 3-4 Abbreviated Diagnostic Mode 3-4 3.4.1 Setting Up a tip Connection to Another Workstation 3-5 Tests the POST Runs 3-6 POST Error Messages 3-8 Status Lights (LEDs) and Indicators 3-8...
  • Page 5 Tools Required 5-3 Power Off and On 6-1 Powering Off the System 6-1 6.1.1 Powering Off When the System Is Working Normally 6-1 6.1.2 Powering Off When the System Does Not Respond Normally Powering On the System 6-4 Internal Access 7-1 Disconnecting the External Cables 7-1 Opening the System Unit 7-2 Attaching the Wrist Strap 7-3...
  • Page 6 9.1.3 Installing a Hard Disk Drive 9-13 Disk Drive Bracket 9-15 9.2.1 Removing the Disk Drive Mounting Bracket 9-16 9.2.2 Replacing the Disk Drive Mounting Bracket 9-19 Diskette Drive 9-21 9.3.1 Removing the Diskette Drive 9-22 9.3.2 Replacing the Diskette Drive 9-23 System Board Overview 10-1 10.1 Before You Begin 10-1...
  • Page 7 11.5 Nonvolatile RAM (NVRAM) 11-31 11.5.1 Removing the NVRAM 11-31 11.5.2 Replacing the NVRAM 11-33 11.6 SPARCstation LX ISDN Jumper Settings 11-33 Illustrated Parts Breakdown 12-1 12.1 Illustrations of Selected CRUs 12-1 12.2 Replacement Part List 12-4 A. System Specifications A-1 Input Power Requirements A-1 Environmental Requirements A-2 Physical Specifications A-3...
  • Page 8 B.13 Diskette Drive Connector (Internal) B-12 B.14 SBus Connector (Internal) B-13 B.15 Power Connector (Internal) B-14 C. On-Board Diagnostics C-1 Running the On-Board Diagnostics C-1 C.1.1 Test <alias name>, Test <device path> C-3 C.1.2 Test-all C-4 C.1.3 Watch-clock C-4 C.1.4 Watch-net, Watch-aui, Watch-tpe and Watch-net-all C-4 C.1.5 Probe-scsi, Probe-scsi-all C-7...
  • Page 9 Figures Front Panel of the SPARCclassic and SPARCstation LX System Units 1-2 FIGURE 1-1 Rear Panel of the System Unit 1-3 FIGURE 1-2 System Unit Internal Components 1-4 FIGURE 1-3 Typical DSIMM 1-5 FIGURE 1-4 Typical SBus Card 1-6 FIGURE 1-5 Connecting the Major System Components 1-9 FIGURE 1-6 Default Boot Mode 2-3...
  • Page 10 System I/O Board and Unit Bottom 8-8 FIGURE 8-3 Extracting the Main Logic Board 8-10 FIGURE 8-4 Raising the Speaker/LED Assembly 8-10 FIGURE 8-5 Removing and Replacing the Main Logic Board 8-11 FIGURE 8-6 Removing the System I/O Board 8-12 FIGURE 8-7 Plugging in the Main Logic Board 8-14 FIGURE 8-8...
  • Page 11 Positioning the SBus Card 11-5 FIGURE 11-3 Connecting the SBus Card 11-6 FIGURE 11-4 VSIMM Slot Location 11-8 FIGURE 11-5 Removing the VSIMM 11-9 FIGURE 11-6 Installing the VSIMM 11-10 FIGURE 11-7 Typical DSIMM 11-11 FIGURE 11-8 DSIMM Slot Locations 11-12 FIGURE 11-9 Removing a DSIMM 11-15 FIGURE 11-10...
  • Page 12 Serial Connector B-7 FIGURE B-7 Parallel Connector B-8 FIGURE B-8 13W3 Video Connector B-9 FIGURE B-9 Audio Ports B-10 FIGURE B-10 Audio Line-out Connector B-10 FIGURE B-11 Audio Line-in Connector B-10 FIGURE B-12 Internal SCSI Connector B-11 FIGURE B-13 Diskette Drive Connector B-12 FIGURE B-14 SBus Connector B-13 FIGURE B-15...
  • Page 13 Tables NVRAM Parameters Used During POST and Boot Sequence 2-5 TABLE 2-1 Summary of Autoboot and Diagnostic Switch Parameters TABLE 2-2 Diagnostic Tools 2-7 TABLE 2-3 On-Board Diagnostics TABLE 2-4 Interpreting the Keyboard Diagnostic LEDs 3-2 TABLE 3-1 Listing of POST Tests TABLE 3-2 Troubleshooting Tips TABLE 4-1...
  • Page 14 Memory Configuration Matrix—SPARCclassic X Terminal 11-12 TABLE 11-1 Configuration Matrix for Memory Modules 11-13 TABLE 11-2 SPARCstation LX ISDN Jumper Settings 11-34 TABLE 11-3 Part Number List—Customer Replaceable Units 12-5 TABLE 12-1 Part Number List—Miscellaneous Items 12-7 TABLE 12-2 Part Number List—Related Hardware Documentation 12-7 TABLE 12-3 Input Power Requirements and Power Dissipation...

  • Page 15: Preface

    The SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual describes how to: Identify system problems by running diagnostic programs Remove and replace customer replaceable units (CRUs) This book is written for Sun Field Service representatives, original equipment manufacturers (OEMs), value-added resellers (VARs), and other customers with self- maintenance contracts.

  • Page 16: Illustrated Parts Breakdown

    Part 6, “Illustrated Parts Breakdown,“ provides illustrations of the major replaceable parts and lists part numbers. Part 7, “Appendixes, Glossary, and Index,“ defines physical, electrical, and environmental specifications; lists connector pinouts and signal descriptions; explains how to run selected on-board diagnostics; and provides a glossary of technical terms, and an index.
  • Page 17 Typographic Conventions (Continued) TABLE P-1 Typeface or Symbol Meaning Example Superuser prompt, all shells Superuser prompt, all shells Mouse buttons are referred to in this way: SELECT Mouse ADJUST Buttons MENU Related Books The following books provide additional information, and are occasionally referenced in this manual: Open Boot Command Summary provides quick-reference information about the various functions of the Open Boot PROM.
  • Page 18 The SunDiagnostic Executive is the tool of choice when you need thorough diagnostics. With the SunDiagnostic Executive, you can determine which customer replaceable unit needs to be replaced. Sun ISDN-BRI/SBI Hardware Configuration Guide explains about configuring ISDN jumpers. Notes, Cautions, and Warnings Caution –...

  • Page 19: Product Description

    C H A P T E R Product Description This chapter presents an overview of the major components of the SPARCclassic, SPARCstation LX systems, and the SPARCclassic X terminal. Acquaint yourself with the overview before servicing and maintaining the hardware for these products. Section 1.1 “System Unit”...

  • Page 20: Figure 1-1 Front Panel Of The Sparcclassic And Sparcstation Lx System Units

    Diskette drive (optional) System power LED Front Panel of the SPARCclassic and SPARCstation LX System Units FIGURE 1-1 The SPARCclassic X terminal chassis looks identical to the chassis shown above, except that the components on the list below are either not available or are inactive, and are consequently covered by connector covers: Diskette drive slot SCSI port...
  • Page 21 Lock block Courtesy AC power outlet System unit AC power receptacle AC power switch SBus card connector openings ISDN network termination port * ISDN terminal endpoint port * Twisted-pair Ethernet port Keyboard Serial Audio Audio 13W3 video SCSI Parallel port ports A/B input jack output jack...

  • Page 22: Main Logic Board

    SBus card (system option) SBus slots UNIT BOTTOM VSIMM module (option on SPARCstation LX only) Main logic board System I/O board Speaker/Power LED assembly Keyboard soft power-on cable Main logic power cable Diskette drive data cable Diskette drive Power supply DSIMMs (fully populated) Hard drive data cable...

  • Page 23: Memory Modules

    1.1.2 Memory Modules SPARCclassic and SPARCstation LX system units come equipped with at least 16 megabytes of dynamic random access memory (DRAM), expandable to 96 megabytes. The X terminal comes with either 4 or 8 megabytes of DRAM, expandable to 96 megabytes. Physically, DRAM chips are grouped in single in-line memory modules (DSIMMs) that plug into DSIMM slots located on the main logic board of the system unit (see ).

  • Page 24: Nonvolatile Ram (Nvram)

    Typical SBus Card FIGURE 1-5 The following is a sampling of the SBus cards available for SPARCclassic and SPARCstation LX systems. Note that this is not an all-inclusive list. GX Graphics Accelerator Card – This card controls the video output from the system unit, and accelerates the generation of graphic images.

  • Page 25: Internal Hard Disk Drive

    Internal Diskette Drive The top half of the system unit accommodates a 3.5-inch, triple-density diskette drive, which is Sun™, IBM®, and NEC® compatible. It uses 3.5-inch (88.9-mm) diskettes (types HD, 2HD, and 2DD) and supports densities of 720 kilobytes, 1.2 megabytes, and 1.44 megabytes.

  • Page 26: External Storage Devices

    The main logic board has a built-in frame buffer that controls video output from the system unit and can drive either color or grayscale monitors. External Storage Devices You can add expansion storage devices to increase the mass storage capacity of the SPARCclassic and SPARCstation LX systems.
  • Page 27 Monitor SCSI terminator External drive External drive External drive SCSI cable AC power cable (optional) AC power cable (system unit) Monitor power 13W3 video Keyboard Keyboard Mouse and cable cable cable cable Thick Ethernet (via adapter cable) Audio input/ output jacks ISDN connectors (SPARCstation LX only)
  • Page 28 1-10 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...

  • Page 29: Troubleshooting Overview

    C H A P T E R Troubleshooting Overview This chapter describes the different types of diagnostic firmware and software tools available to you for troubleshooting, and explains how they are related and when to use them. Section 2.1 “Default Boot Mode” Section 2.2 “Boot PROM Diagnostics”...
  • Page 30 Power-On Self-Test On-Board Diagnostics The Power-On Self-Test (POST) tests the core CPU functionality. The progress of testing can be monitored using the keyboard LEDs, the video monitor, and the system’s serial port A. If there is system trouble, you may want to run the extended On-Board Diagnostics to take advantage of more extensive tests, including—but not limited to—Ethernet, SCSI, memory, and diskette drive tests.

  • Page 31: Figure 2-1 Default Boot Mode

    True Boot from device Boot from device Boot user-specified On-board diagnostics alias "net" alias "disk" device and program Normal Sun Diagnostic operating system Executive Sundiag System Exerciser Not applicable to the SPARCclassic X terminal Default Boot Mode FIGURE 2-1 Chapter 2...

  • Page 32: Low-Level Post Code

    Low-Level POST Code When you turn on the system power, the low-level POST is initiated if any of the following circumstances apply: Keyboard is disconnected. Stop-d keys are held down when you turn on the power. diag-switch? NVRAM parameter is set to True. The low-level POST code, which is stored in the boot PROM, is designed to test the most basic functions of the system hardware.
  • Page 33 Note – At any point during the high-level POST, you can abort the POST process and access the Forth Toolkit or system monitor by pressing the Stop and “a” keys simultaneously. NVRAM Parameters Used During POST and Boot Sequence TABLE 2-1 NVRAM Parameter Description This parameter determines how many megabytes of memory...
  • Page 34 1. The boot parameters represented here are default settings. The defaults may be changed by following the pro- cedures listed in the Open Boot Command Summary. Once the operating system is running, you can invoke the Sundiag System Exerciser if further diagnostic testing is warranted. Refer to Section 2.7 “Sundiag System Exerciser”...

  • Page 35: Diagnostic Tools And When To Use Them

    Diagnostic Tools and When to Use Them provides a summary of the available diagnostic tools and describes when TABLE 2-3 to use each tool. Diagnostic Tools TABLE 2-3 Diagnostic Tool When or Why to Use the Tool Power-On Self-Test (POST) Executes automatically at power-on when Stop-d keys are pressed or when the diag-switch? parameter is set to True.

  • Page 36: Power-On Self-Test

    Power-On Self-Test For more information about the POST, see Chapter 3 “Power-On Self-Test (POST).” Selected On-Board Tests For information about how to run the On-Board Diagnostics, see Appendix C “On- Board Diagnostics.” lists specific on-board diagnostic tests for TABLE 2-4 SPARCclassic and SPARCstation LX systems.

  • Page 37: Sundiag System Exerciser

    On-Board Diagnostics (Continued) TABLE 2-4 Test Description and Requirements test tape Tests the SCSI tape drive by executing the drive self-test program. (tape and tape0 = test tape0 SCSI target 4, tape1 = SCSI target 5.) test tape1 test ttya Test outputs an alphanumeric test pattern on the system serial ports.

  • Page 38: Sundiagnostic Executive

    For extensive information about tests you can run from the Forth Toolkit, see Open Boot Command Reference. SunDiagnostic Executive The SunDiagnostic Executive is an independent operating system. It runs exhaustive subsystem tests that are independent of the normal operating system. Run the SunDiagnostic Executive if all POSTs pass, but your system still has a problem.

  • Page 39: Power-On Self-Test (Post)

    C H A P T E R Power-On Self-Test (POST) This chapter describes the Power-On Self-Test (POST) for normal, full, and abbreviated modes, available with your SPARCclassic and SPARCstation LX. Section 3.1 “Power-On Self-Test (POST)” Section 3.2 “Normal Mode” Section 3.3 “Full Diagnostic Mode” Section 3.4 “Abbreviated Diagnostic Mode”...
  • Page 40 Four different LEDs on the keyboard are used to indicate the progress and results of the POST. These LEDs are on the Caps Lock, Compose, Scroll Lock, and Num Lock keys, as shown in . To indicate the beginning of the POSTs, the four LEDs FIGURE 3-1 briefly light all at once.

  • Page 41: Power-On Self-Test (Post)

    Sun Type-5 keyboard connected to its keyboard port. The LED diagnostics feature does not apply if a different keyboard is connected to the keyboard port, or if a terminal and its keyboard are used as a main console instead of a monitor and Sun Type-5 keyboard.

  • Page 42: Normal Mode

    Normal Mode Under Normal mode, when the system is turned on, control is sent to the Open Boot PROM. Depending on the options set in the Open Boot PROM, for example if autoboot is enabled (set to true), the operating system will load. Diagnostic testing is not run.

  • Page 43: Setting Up A Tip Connection To Another Workstation

    The Shell window is now a tip window directed to the Sun workstation serial port. 4. When you are finished running POST and want to disconnect the tip window, type kill -9 and the process ID number of the tip hardwire process.

  • Page 44: Tests The Post Runs

    Tests the POST Runs Following is a sample listing of the full diagnostic mode tests completed by POST. Listing of POST Tests TABLE 3-2 MMU Context Table Reg Test MMU Context Register Test MMU TLB Replace Ctrl Reg Tst MMU Sync Fault Stat Reg Test MMU Sync Fault Addr Reg Test MMU TLB RAM NTA Pattern Test MMU TLB CAM NTA Pattern Test...
  • Page 45 Listing of POST Tests (Continued) TABLE 3-2 FPU SP Inexact CEXC Test FPU SP Trap Priority > Test FPU SP Trap Priority < Test FPU DP Invalid CEXC Test FPU DP Overflow CEXC Test FPU DP Divide-by-0 CEXC Test FPU DP Inexact CEXC Test FPU DP Trap Priority >...

  • Page 46: Post Error Messages

    POST Error Messages The POST error messages returned to the terminal are self-explanatory. For example, if no DSIMM is installed in the system, POST will tell you that no DSIMM is installed and the slot number of the SIMM slot. Use the error messages returned by POST to troubleshoot the system.

  • Page 47: Figure 3-4 Arrangement Of The Type-5 Keyboard Leds

    Scroll Lock Num Lock Caps Lock LED Caps Lock Compose (UNIX keyboard) (U.S. keyboard) Arrangement of the Type-5 Keyboard LEDs FIGURE 3-4 If the Caps Lock key fails to flash on and off after you have pressed and held the Stop-d keys when you power on the system, POST failed.
  • Page 48 3-10 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...

  • Page 49: Troubleshooting Procedures

    C H A P T E R Troubleshooting Procedures This chapter describes how to troubleshoot SPARCclassic and SPARCstation LX system problems. Each problem is described, and a set of procedures is provided for a solution to the problem. Section 4.1 “No Video Output on the System Monitor” Section 4.2 “Power-On Does Not Succeed”...

  • Page 50: No Video Output On The System Monitor

    Troubleshooting Tips (Continued) TABLE 4-1 Problem Action Slow disk drive response. If many SCSI devices are connected to the same SCSI bus and if some of these devices are “fast SCSI” devices, you can install an FSBE/S SBus card to the “fast SCSI” devices to speed up performance. Read, write, or parity error Replace the disk drive indicated by the failure message.

  • Page 51: Power Supply Test

    2. Check that the system power cord is properly connected to the system rear panel power receptacle and to the wall outlet. 3. Verify with a VOM that the wall outlet is supplying AC power to the system. 4. Turn the system power switch on and observe the keyboard. The LEDs on the keyboard should briefly light.

  • Page 52: Figure 4-1 Power Supply Connector

    1 2 3 4 5 6 7 8 9 10 11 12 Power Supply Connector FIGURE 4-1 shows the pin assignments on the power supply connector. TABLE 4-2 Power Supply Connector Pin Assignments TABLE 4-2 Description Description +5 Vdc +5 Vdc +5 Vdc +5 Vdc Ground...

  • Page 53: System Board Test

    4.2.2 System Board Test 1. Connect a terminal to serial port A or use a tip connection to another workstation to receive additional POST failure information. To set up a tip connection to another workstation, see Section 3.4.1 “Setting Up a tip Connection to Another Workstation.”...

  • Page 54: Disk Drive Errors

    Disk Drive Errors presents disk drive error conditions and corrective actions. TABLE 4-3 Troubleshooting Disk Drive Errors TABLE 4-3 Symptom Corrective Action Read, write, or parity error Replace the disk drive indicated by the failure reported by the operating system message.

  • Page 55: Determining Faulty Dsimm Locations

    a. If the disk drive responds and a message is displayed, the system SCSI controller has successfully probed the devices. This indicates that the system board is working correctly. b. If a disk doesn’t respond: i. Verify that the SCSI target ID is set correctly. Make sure that every SCSI disk and other SCSI device on the SCSI bus has a different SCSI target ID.

  • Page 56: Figure 4-2 Dsimm Slot Locations

    For example, in a system using 16-Mbyte DSIMMs, if an error is detected at physical memory address 12fe958, shows that the error occurred in memory bank 1 TABLE 4-4 (DSIMMs U0304 and U0303). then shows that the defective DSIMM is in TABLE 4-6 slot U0304.
  • Page 57 Physical Memory Address Ranges for 1-Mbyte and 2-Mbyte SIMMs TABLE 4-5 Physical Memory Address Ranges Bank SIMM # 1-Mbyte SIMMs 2-Mbyte SIMMs U0304 0000000 through 01FFFFF 0000000 through 01FFFFF U0303 0000000 through 01FFFFF 0400000 through 05FFFFF U0301 2000000 through 21FFFFF 2000000 through 21FFFFF U0302 2000000 through 21FFFFF...
  • Page 58 4-10 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...

  • Page 59: Safety And Tools Requirements

    C H A P T E R Safety and Tools Requirements This chapter describes standards, safety procedures, and precautions you should follow whenever you need to replace or remove assemblies or subassemblies from your system. Section 5.1 “Safety Requirements” Section 5.2 “Symbols” Section 5.3 “System Precautions”...

  • Page 60: Symbols

    To protect both yourself and the equipment, observe the safety precautions listed in TABLE 5-1 Safety Precautions TABLE 5-1 Item Problem Precaution AC power cord Electric shock Unplug the AC cord from the AC wall socket before working on the power supply. Grounding Leave the AC power cord plugged into the AC wall outlet when replacing drives, SIMMs, chips, or the system board.

  • Page 61: System Precautions

    Procedures contained in this document must be performed by trained maintenance providers. Only people who have been trained at the Sun Microsystems® training facilities (or at Sun Microsystems affiliates) and have been certified as required by local and national laws are considered qualified.
  • Page 62 Shipping container that is used to package a Sun replacement part. Inner surface of the system unit cover. Sun electrical static discharge (ESD) mat with Sun logo. Contact your Sun sales representative to purchase it. Disposable ESD mat. You can purchase it through your Sun sales representative.

  • Page 63: Power Off And On

    C H A P T E R Power Off and On This chapter explains steps to perform before removing a customer replaceable unit (CRU). Section 6.1 “Powering Off the System” Section 6.2 “Powering On the System” Powering Off the System Before you begin any removal or replacement procedure, you must halt the system in an orderly manner.
  • Page 64 2. Return to the operating system environment. If you are in a windowing environment, exit from it and wait for the system prompt to appear. See the documentation supplied with your windowing system. Note – On a SPARCclassic X terminal, just click SELECT on the Halt button in the Terminal Controls window.

  • Page 65: Powering Off When The System Does Not Respond Normally

    3. Monitor 6.1.2 Powering Off When the System Does Not Respond Normally To halt a system that is hung, or frozen, and unresponsive to commands: 1. If your system is on a network, wait a few minutes before proceeding. Your system’s slow response may be due to network problems or delays. Check with the person in charge of your network.

  • Page 66: Powering On The System

    For example, to halt the system immediately type: nevada% su Password: welcome (Password does not appear on screen.) nevada# /usr/sbin/init 0 5. After halting the operating system, wait for either the > or ok prompt. The system displays system halt messages followed by either the > or ok prompt. When either prompt appears, you can safely turn off the power in the proper sequence.
  • Page 67 2. Turn on the power in this sequence: 1. External drive units (if any), starting with the unit that is furthest electrically from the system unit 2. Monitor (if you turned it off) 3. Desktop SPARCstation system unit 3. Boot the operating system. The operating system may start to boot automatically, or you may need to enter a command at the system prompt.
  • Page 68 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...

  • Page 69: Internal Access

    C H A P T E R Internal Access This chapter describes how to access the subassemblies inside the system unit, and how to close the system unit after you have finished. Section 7.1 “Disconnecting the External Cables” Section 7.2 “Opening the System Unit” Section 7.3 “Attaching the Wrist Strap”...

  • Page 70: Opening The System Unit

    Opening the System Unit Caution – Before opening the system unit, make sure the system power switch is in the Standby position. The green LED on the front of the system unit should not be lit, and the fan should not be running. When the system power switch is in the Standby position, and the AC power cord remains connected to a power outlet, hazardous AC voltage is still present in the power supply primary.

  • Page 71: Attaching The Wrist Strap

    Remove lock block from back panel System unit opens like a suitcase Opening the System Unit FIGURE 7-1 Caution – When you are finished installing parts inside the system unit, be sure to close the system unit before turning on the power. It is not safe to operate the system unit while it is open.

  • Page 72: Closing The System Unit

    To attach a wrist strap: 1. Wrap the grounding strap twice around your wrist. Make sure the adhesive side is against your skin. 2. Attach the end with the adhesive copper strip to the metal casing of the power supply in the top of the system unit. Attach end to metal case of power supply Wrap the wrist strap twice around...
  • Page 73 d. Check that the power supply wiring is tucked inside the system to avoid pinching the wiring when you close the system unit. 2. Detach and remove the wrist strap. 3. Grasp the unit top near the power supply (see FIGURE 7-3 Rotate the unit top at a 15-degree angle and rotate your hand position so that thumbs and fingers point up and the five interlock hooks can be aligned.

  • Page 74: Figure 7-3 Closing The System Unit

    Align hooks, push top toward rear, Interlock hooks and close Reattach lock block to back panel Closing the System Unit FIGURE 7-3 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...

  • Page 75: Reconnecting The External Cables

    Reconnecting the External Cables Refer to to reconnect the system cables. FIGURE 7-4 SCSI terminator External drive External drive External drive SCSI cable (optional) AC power cable Monitor AC power cable (system unit) Monitor power cable 13W3 video cable Keyboard cable Keyboard Mouse and cable Thick Ethernet...
  • Page 76 See the Desktop SPARC Hardware Owner’s Guide, or Using a SPARCclassic X Terminal for complete details about cabling. To turn on power to the system, See Section 6.2 “Powering On the System” on page 6-4. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...

  • Page 77: Major Subassemblies

    C H A P T E R Major Subassemblies This chapter describes how to remove and replace the system unit’s major subassemblies. Section 8.1 “Power Supply” Section 8.2 “Speaker/Power LED Assembly” Section 8.3 “System I/O Board” Power Supply The power supply is a self-contained metal assembly in the system unit top just behind the disk drive mounting bracket (see FIGURE 9-12 The power supply is held in place by four hooks in the unit top that mate with four...
  • Page 78 1. Prepare to work on the system as described in Chapter 7 “Internal Access. Halt the system and verify that the power LED is not lit and that the fan is not running. Then open the system unit and attach a wrist strap as described in Section 7.3 “Attaching the Wrist Strap”...

  • Page 79: Replacing The Power Supply

    Replace Remove Hooks Removing and Replacing the Power Supply FIGURE 8-1 8.1.2 Replacing the Power Supply To install a new power supply: 1. Remove the faulty power supply as described in the previous section. 2. Install the new power supply. 1.

  • Page 80: Speaker/Power Led Assembly

    4. Connect the AC power cord between the system unit and an AC wall outlet to provide the ground path for the wrist strap. 5. Reinstall the disk drive mounting bracket. Reinstall the disk drive mounting bracket in front of the power supply. For detailed instructions, see Section 9.2.2 “Replacing the Disk Drive Mounting Bracket”...
  • Page 81 Caution – The AC power cord should remain attached between the system unit and an AC wall outlet. This connection provides the ground path necessary to protect internal system components from harmful static discharges. Inside the system unit, be sure the power supply wiring harness is connected to the main logic board to complete the ground.

  • Page 82: Replacing The Speaker/Power Led Assembly

    Squeeze the two levers at the base of the assembly, and slide the assembly up. Removing and Replacing the Speaker/Power LED Assembly FIGURE 8-2 8.2.2 Replacing the Speaker/Power LED Assembly To replace the speaker/power LED assembly: 1. Remove the faulty speaker/power LED assembly as described in the previous section.

  • Page 83: System I/O Board

    Reconnecting system components 5. Refer to Chapter 6 “Power Off and On to turn the power on. System I/O Board The system I/O board is located in the bottom half of the system unit (see ). It provides all of the system’s I/O connectors through cutouts in the FIGURE 8-3 unit’s rear panel.
  • Page 84 Caution – When the system power switch is in the Standb position, and the AC power cord remains connected to a power outlet, hazardous AC voltage is still present in the power supply primary. Do not attempt to service the power supply under these conditions.
  • Page 85 4. Disconnect all cables attached to the main logic board. For connector locations, choose the appropriate board illustration in Chapter 11 “Main Logic Board and Component Replacement. 1. Disconnect the 12-pin power supply cable from its mating connector by squeezing the clip at the end of the cable and pulling straight up.
  • Page 86 Speaker/power LED assembly System I/O board Main logic board Main logic board extractor Extracting the Main Logic Board FIGURE 8-4 Squeeze the two levers at the base of the assembly, and slide the assembly up. Raising the Speaker/LED Assembly FIGURE 8-5 8-10 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual •...
  • Page 87 Main logic board Speaker/power LED assembly System I/O board UNIT BOTTOM Main logic board extractor lever Removing and Replacing the Main Logic Board FIGURE 8-6 6. Remove the system I/O board. 1. On the SPARCclassic X terminal, pull the plastic connector covers off the inactive ports to gain access to the screws.

  • Page 88: Replacing The System I/O Board

    2. Use a small flat-blade screwdriver to remove the 10 screws that secure the system I/O board to the system unit chassis (see ). Take care to remember FIGURE 8-7 where each screw belongs. 3. Pull the system I/O board away from the back panel to remove it. Remove screws (10 places) Removing the System I/O Board...
  • Page 89 b. Tilt the board to avoid the speaker assembly and lower it onto the floor of the system unit. c. Align the board’s edge connector with its mating connector on the system I/O board. d. Push the main logic board extractor lever toward the rear of the system unit to plug the main logic board into the system I/O board (see FIGURE 8-8 e.
  • Page 90 Speaker/power LED assembly System I/O board Main logic board Main logic board extractor lever Plugging in the Main Logic Board FIGURE 8-8 4. Reinstall any SBus cards (if applicable). See Section 11.1.2 “Replacing SBus Cards” on page 11-4 for installation details. 5.

  • Page 91: Storage Devices

    C H A P T E R Storage Devices This chapter includes information about how to replace the system storage drives. Section 9.1 “Hard Disk Drive” Section 9.2 “Disk Drive Bracket” Section 9.3 “Diskette Drive” Hard Disk Drive One 3.5-inch hard disk drive can be installed in the top section of the system chassis. A 50-pin SCSI data cable and a 4-pin power cable connect to the rear of the drive.

  • Page 92: Removing A Hard Disk Drive

    Caution – Verify that the system power switch is in the Standby position. The green LED at the front of the system unit should not be lit and the fan should not be running. When the system power switch is in the Standby position, and the AC power cord remains connected to a power outlet, hazardous AC voltage is still present in the power supply primary.

  • Page 93: Preparing A Hard Drive For Installation

    Diskette drive data cable Pull tab Keyboard soft power-on cable Pull tab Main logic power cable Hard drive power cable Cable Hard drive management data cable guides Power supply Hard disk drive Disk drive mounting bracket Drive screw holes UNIT TOP Disk drive bracket Disk drive bracket without grommet...

  • Page 94: Verifying The Jumper Settings

    9.1.2.1 Verifying the Jumper Settings The SCSI ID jumpers must be set to SCSI address 3. This is the factory default setting, but you should verify the jumper settings. The location of the SCSI ID jumpers depends on the type of drive shipped with your system.
  • Page 95 SS (enable self-seek) EP (enable parity checking) WS (enable wait spin) SCSI device address Power Data connector connector Jumper Settings for 207-Mbyte Drive With Jumpers on the Right-Hand Side FIGURE 9-3 Chapter 9 Storage Devices...
  • Page 96 SCSI Internal term power device address Term power to Bus Delay spin-up Parity EN Remote spin-up Factory default Jumper Settings for 424-Mbyte Drive FIGURE 9-4 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...
  • Page 97 A0 = E1 0, or 1 when jumpered SCSI device A1 = E2 2 when jumpered address jumpers A2 = E3 4 when jumpered Serial port jumpers SCSI address 3 (not jumpered) (E1 and E2 jumpered) SCSI power terminator (E5 jumpered) Power connector SCSI power terminator (E6 not jumpered)
  • Page 98 535-Mbyte Conner Drive Configuration Jumpers (Continued) TABLE 9-1 Pin Pair Description Factory Set Wait spin disabled Disk power termination SCSI bus power termination Motor enabled (ME jumpered) Parity disabled (PE jumpered) Manufacturing header pins SCSI address 3 (A0 and A1 jumpered) Power connector Data connector...
  • Page 99 describes the 535-megabyte Seagate drive’s factory jumper settings. TABLE 9-2 535-Mbyte Seagate Drive Configuration Jumpers TABLE 9-2 Abbreviation Description Factory Set Reserved Motor start delay Motor start is enabled at unit’s start command Write protect disabled Parity disabled Reserved Drive does not supply power termination to itself Drive does not supply power termination to the SCSI bus...
  • Page 100 SCSI ID jumpers Data connector Power connector SCSI device address Power and data connectors Jumper Settings for 1.0-Gbyte Drive (Part 370-1546) FIGURE 9-7 9-10 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...
  • Page 101 Drive configuration jumpers Motor enable (ME jumpered) Parity enable (PE jumpered) Manufacturing header pins (not used) Power SCSI ID jumpers Data connector SCSI address set to 3, connector (A0 and A1 jumpered) Jumper Settings for Seagate 1.0-Gbyte Drive FIGURE 9-8 describes the 1.0-gigabyte Seagate drive’s factory jumper settings.
  • Page 102 1.0-Gbyte Seagate Drive Configuration Jumpers (Continued) TABLE 9-3 Abbreviation Description Factory Set Termination enable Termination power from drive Termination power to SCSI bus SCSI ID device A0 E1—0, or 1 when jumpered address jumpers A1 E2—2 when jumpered A2 E3—4 when jumpered SCSI ID address 3 (E0 and E1 jumpered) Motor Enable...

  • Page 103: Installing A Hard Disk Drive

    describes the 1.0-gigabyte Connor drive’s factory jumper settings. TABLE 9-4 1.0-Gbyte Conner Drive Configuration Jumpers TABLE 9-4 Pin Pair Description Factory Set SCSI ID address SCSI ID address SCSI ID address (Reserved) Motor enable Delay spin Disable parity SCSI bus power termination 9.1.3 Installing a Hard Disk Drive...
  • Page 104 Keyboard soft power-on cable Hard drive power cable Main logic power cable Cable management Pull tab guides Hard drive data cable Data cable connector Power supply Hard disk drive Disk drive screw holes Disk drive mounting bracket UNIT TOP Standard screw If the mounting bracket has If the mounting bracket has no grommets, follow step 3.

  • Page 105: Disk Drive Bracket

    7. Locate the disk drive power cable coming from the power supply and connect it to the disk drive. The disk drive power cable has a small 4-pin connector. The power connector on the hard drive is located next to the data connector, and is shown in .

  • Page 106: Removing The Disk Drive Mounting Bracket

    9.2.1 Removing the Disk Drive Mounting Bracket To remove the disk drive mounting bracket: 1. Prepare to work on the system as described in Chapter 6 “Power Off and On,” and in Chapter 7 “Internal Access. Halt the system and verify that the power LED is not lit and the fan is not running. Then open the system unit and attach a wrist strap as described in Section 7.3 “Attaching the Wrist Strap”...
  • Page 107 UNIT BOTTOM SBus card SBus slots (system option) VSIMM module (option on SPARCstation LX only) Main logic board System Speaker/Power LED assembly I/O board Keyboard soft power-on cable Main logic power cable Diskette drive data cable (optional) Cable management guides Diskette drive (optional) Power supply...
  • Page 108 Main logic power cable Diskette drive data cable Keyboard soft Pull tab power-on cable Diskette drive Pull tab power cable (hidden from view) Hard drive Power supply power cable Hard drive data cable Hard disk drive Drive bracket screw holes Drive mounting bracket Captive...

  • Page 109: Replacing The Disk Drive Mounting Bracket

    Captive screw Disk drive mounting bracket Detail of Disk Drive Mounting Bracket FIGURE 9-14 9.2.2 Replacing the Disk Drive Mounting Bracket To replace the disk drive mounting bracket: 1. Preparation. Before setting the disk drive bracket flat in the unit top, connect the power cable to the diskette drive (if present) and the data cable to the hard drive (see FIGURE 9-15 FIGURE 9-16...
  • Page 110 Main logic power cable Diskette drive data cable Keyboard soft Pull tab power-on cable Diskette drive Pull tab power cable (hidden from view) Hard drive Power supply power cable Hard drive data cable Hard disk drive Drive bracket screw holes Drive mounting bracket Captive...

  • Page 111: Diskette Drive

    Reconnecting system components 6. Refer to Chapter 6 “Power Off and On to turn the power on. Diskette Drive The diskette drive is in the unit top at the front right side (see ). A 34-pin FIGURE 9-12 data cable and a 4-pin power cable connect to the rear of the drive. Four Phillips- head screws attach the diskette drive to the mounting bracket.

  • Page 112: Removing The Diskette Drive

    9.3.1 Removing the Diskette Drive To remove the diskette drive: 1. Preparation. Follow the instructions for removing the disk drive mounting bracket in Section 9.2.1 “Removing the Disk Drive Mounting Bracket. 2. Remove the four Phillips-head screws holding the diskette drive to the disk drive mounting bracket (see FIGURE 9-16 3.

  • Page 113: Replacing The Diskette Drive

    This completes the diskette drive removal process. 9.3.2 Replacing the Diskette Drive To replace the diskette drive: 1. Remove the defective diskette drive as instructed in the preceding section. 2. On the replacement drive, verify the proper setting of the drive select switch. Make sure the switch position matches that of the defective drive.
  • Page 114 9-24 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...

  • Page 115: System Board Overview

    C H A P T E R System Board Overview This chapter describes how to prepare for replacing the system board and its components and assemblies when you are replacing parts. Each SPARCclassic/ SPARCclassic X/SPARCstation LX system board is illustrated and their customer replaceable units (CRUs) identified.

  • Page 116: Damage Prevention

    10.2 Damage Prevention Caution – Use an antistatic mat (the part number is listed in Chapter 12 “Illustrated Parts Breakdown) when working with the system board. An antistatic mat contains the amount of cushioning needed to protect the underside components, to prevent board flexing, and to provide antistatic protection.
  • Page 117 Caution – Hot surface. Avoid contact. Surfaces are hot and may cause personal injury if touched. Caution – The system board and related modules and cards have surface-mount components which may break when the board is flexed. To minimize the amount of board flexing, observe the following precautions: Hold the system board only by the edges.

  • Page 118: Main Logic Board Layouts

    10.4 Main Logic Board Layouts The main logic board (MLB) resides in the bottom half of each system unit (see shows a simplified layout of the SPARCclassic and the FIGURE 10-4 FIGURE 10-1 SPARCclassic X terminal main logic board. lists acronyms and TABLE 10-2 abbreviations for certain components.
  • Page 119 Power supply Diskette drive Hard drive connector Video SIMM slot data connector data connector Keyboard soft power-on connector SIMM slot U0401 Bank 3 SIMM slot U0302 Bank 2 SIMM slot U0303 Bank 1 SIMM slot U0402 Bank 3 SIMM slot U0301 Bank 2 SIMM slot U0304 Bank 1...

  • Page 120: Identifying Replaceable System Board Components

    Power supply Diskette drive Hard drive connector Video SIMM slot data connector data connector Keyboard soft power-on connector SIMM slot U0401 Bank 3 SIMM slot U0302 Bank 2 SIMM slot U0303 Bank 1 SIMM slot U0402 Bank 3 SIMM slot U0301 Bank 2 SIMM slot U0304 Bank 1...
  • Page 121 Visually identify each CRU by looking at the appropriate system board layout illustration from , or , and by looking at the unit FIGURE 10-1 FIGURE 10-2 FIGURE 10-3 bottom illustration in lists acronyms and abbreviations for FIGURE 10-4 TABLE 10-2 certain components of the MLB.
  • Page 122 SBus card (system option) SBus slots VSIMM module (option on SPARCstation LX only) UNIT BOTTOM Main logic board System Speaker/Power LED assembly I/O board Keyboard soft power-on cable Main logic power cable Diskette drive data cable DSIMMs (fully populated) Hard drive data cable Hard drive power cable UNIT TOP Not applicable to the...

  • Page 123: Main Logic Board And Component Replacement

    C H A P T E R Main Logic Board and Component Replacement This chapter describes procedures for removing and replacing the main logic board and its components. In addition, the default SPARCstation LX ISDN jumper settings are also described. Section 11.1 “SBus Cards”...
  • Page 124 1. Prepare to work on the system as described in Chapter 6 “Power Off and On, and in Chapter 7 “Internal Access. Halt the system and verify that the power LED is not lit and the fan is not running. Then open the system unit and attach a wrist strap as described in Section 7.3 “Attaching the Wrist Strap.
  • Page 125 Lift card at front corners. SBus card retainer Do not use plastic SBus card retainer as a handle. Removing the SBus Card FIGURE 11-1 7. Replace the SBus slot filler panel (if necessary). If you will not be installing a replacement SBus card, install the filler panel before closing the system unit ( ).

  • Page 126: Replacing Sbus Cards

    11.1.2 Replacing SBus Cards Caution – Verify that the system power switch is in the Standby position. The green LED at the front of the system unit should not be lit and the fan should not be running. When the system power switch is in the Standby position, and the AC power cord remains connected to a power outlet, hazardous AC voltage is still present in the power supply primary.

  • Page 127: Figure 11-3 Positioning The Sbus Card

    Back plate Hole Positioning the SBus Card FIGURE 11-3 6. Connect the SBus card to its slot. Align the connector on the card with the SBus slot on the main logic board. Press gently on the corners of the SBus card until the connection is secure (see FIGURE 11-4 Do not force the card.

  • Page 128: Video Simm (Vsimm)

    SBus card retainer Press down on corners of card. Do not press on the plastic SBus card retainer. Connecting the SBus Card FIGURE 11-4 10. Refer to Chapter 7 “Internal Access to perform the following procedures: Detaching the wrist strap Closing the system unit Reconnecting system components 11.

  • Page 129: Removing The Vsimm

    11.2.1 Removing the VSIMM Caution – Printed circuit boards are made of delicate electronic components that are extremely sensitive to static electricity. Ordinary amounts of static from your clothes or work environment can destroy the boards. Handle boards only by the nonconducting edges.

  • Page 130: Figure 11-5 Vsimm Slot Location

    VSIMM slot VSIMM Slot Location FIGURE 11-5 3. Place an antistatic mat, shiny side up, next to the system unit. The mat is supplied with the replacement VSIMM. 4. Remove the faulty VSIMM. Grasp the VSIMM at its top corners and carefully wiggle it free from its connector (see ).

  • Page 131: Replacing The Vsimm

    Caution – The SIMMs installed in your system must be specifically designed to operate in it. Do not transfer a SIMM from a different Sun system unless you are sure it is compatible with your system.

  • Page 132: Dram Single In-Line Memory Modules (Dsimms)

    1. Remove the faulty VSIMM. See Section 11.2.1 “Removing the VSIMM” on page 11-7. Make sure you use the wrist strap and antistatic mat. 2. Install the new VSIMM. The VSIMM is keyed so it can be installed only in one way. Grasp the VSIMM by its top corners and align it with its connector (see ).

  • Page 133: Dsimm Configurations

    11.3.1 DSIMM Configurations The main logic board contains six DSIMM slots capable of accepting either 1-, 2-, 4-, or 16-megabyte DSIMMs. The six DSIMM slots are logically grouped into three memory banks, with two DSIMM slots to a bank. Each slot is labeled 1, 2, or 3 to indicate its corresponding memory bank.
  • Page 134 SIMM slot U0401 Bank 3 SIMM slot U0302 Bank 2 SIMM slot U0303 Bank 1 SIMM slot U0402 Bank 3 SIMM slot U0301 Bank 2 SIMM slot U0304 Bank 1 DSIMM Slot Locations FIGURE 11-9 Memory Configuration Matrix—SPARCclassic X Terminal TABLE 11-1 Total Slot...

  • Page 135: Removing A Dsimm

    Memory Configuration Matrix—SPARCclassic X Terminal (Continued) TABLE 11-1 Total Slot Slot Slot Slot Slot Slot 48 MB 4 MB 4 MB 16 MB 4 MB 4 MB 16 MB 64 MB 16 MB 16 MB — 16 MB 16 MB —...
  • Page 136 Caution – The AC power cord should remain attached between the system unit and an AC wall outlet. This connection provides the ground path necessary to protect internal system components from harmful static discharges. Inside the system unit, be sure the power supply wiring harness is connected to the main logic board to complete the ground.

  • Page 137: Replacing A Dsimm

    Note – The DSIMMs are closely spaced. In order to remove a DSIMM, you may need to remove adjacent DSIMMs first. Keep track of which DSIMMs are installed in which slots. If you are removing a defective DSIMM, take care not to get it mixed up with the other DSIMMs.
  • Page 138 Caution – The SIMMs installed in your system must be specifically designed to operate in it. Do not transfer a SIMM from a different Sun system unless you are sure it is compatible with your system. Caution – Verify that the system power switch is in the Standby position. The green LED at the front of the system unit should not be lit and the fan should not be running.

  • Page 139: Main Logic Board

    Note – Each DSIMM is keyed so it can only be installed in one way. Notched corner ensures proper insertion. Installing a DSIMM FIGURE 11-11 5. Refer to Chapter 7, “internal Access,” to perform the following procedures: Detaching the wrist strap Closing the system unit Reconnecting system components 6.

  • Page 140: Main Logic Board Voltage Test Points

    11.4.1 Main Logic Board Voltage Test Points There are no voltage test points on the main logic board. If you need to measure voltages, the safest place is at the power supply connection on the main logic board (see ). See Section 11.4.2 “Before Replacing the Main FIGURE 11-12 FIGURE 11-13 Logic Board”...
  • Page 141 Keyboard soft Power supply Diskette drive Hard drive power-on connector data connector data connector connector SIMM slot U0401 Bank 3 SIMM slot U0302 Bank 2 SIMM slot U0303 Bank 1 SIMM slot U0402 Bank 3 Monitor control connector SIMM slot U0301 Bank 2 (used by SBus frame buffer cards)
  • Page 142 Power supply Diskette drive Hard drive connector Video SIMM slot data connector data connector Keyboard soft power-on connector SIMM slot U0401 Bank 3 SIMM slot U0302 Bank 2 SIMM slot U0303 Bank 1 SIMM slot U0402 Bank 3 SIMM slot U0301 Bank 2 SIMM slot U0304 Bank 1...

  • Page 143: Before Replacing The Main Logic Board

    Power supply Diskette drive Hard drive connector Video SIMM slot data connector data connector Keyboard soft power-on connector SIMM slot U0401 Bank 3 SIMM slot U0302 Bank 2 SIMM slot U0303 Bank 1 SIMM slot U0402 Bank 3 SIMM slot U0301 Bank 2 SIMM slot U0304 Bank 1...
  • Page 144 Note – Removing and replacing the main logic board is a drastic step to take. Therefore, it is important to try to troubleshoot all other possibilities before removing and replacing the main logic board. To check for and eliminate other possible problems before you replace the main logic board, do the following: 1.
  • Page 145 Caution – Voltage measurements will be inaccurate if the power supply wiring harness is not connected to the main logic board. Without load, the power supply will not regulate. The colored wires of the power harness supply the following signals and voltages: Red: +5V Blue: +12V Brown: -12V...

  • Page 146: Removing The Main Logic Board

    e. Use the commands shown below to set the diagnostic switch to True, set the autoboot switch to False, and reset the system. ok setenv diag-switch? true ok setenv auto-boot? false ok reset As the POSTs run, view the results on the terminal screen. f.
  • Page 147 Note – Removing and replacing the main logic board is a drastic step to take. See Section 11.4.2 “Before Replacing the Main Logic Board” on page 11-21 for troubleshooting information. To remove the main logic board: 1. Prepare to work on the system as described in Chapter 6 “Power Off and On,” and in Chapter 7 “Internal Access.”...
  • Page 148 6. Disconnect all cables attached to the main logic board. For connector locations, refer to in Section 11.4 “Main FIGURE 11-12 FIGURE 11-13 Logic Board” on page 11-17. a. Disconnect the 12-pin power supply cable from its mating connector by squeezing the clip at the end of the cable and pulling straight up.

  • Page 149: Figure 11-15 Extracting The Main Logic Board

    Speaker/power LED assembly System I/O board Main logic board Main logic board extractor lever Extracting the Main Logic Board FIGURE 11-15 Squeeze the two levers at the base of the assembly, and slide the assembly up. Raising the Speaker/LED Assembly FIGURE 11-16 Chapter 11 Main Logic Board and Component Replacement...

  • Page 150: Figure 11-17 Removing And Replacing The Main Logic Board

    Main logic board Speaker/power LED assembly System I/O board UNIT BOTTOM Main logic board extractor lever Removing and Replacing the Main Logic Board FIGURE 11-17 11-28 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...

  • Page 151: Installing The New Main Logic Board

    11.4.4 Installing the New Main Logic Board This section explains how to install a replacement main logic board in the system unit. To install the main logic board: 1. Remove the defective main logic board as described in the previous section. 2.

  • Page 152: Figure 11-18 Plugging In The Main Logic Board

    Speaker/power LED assembly System I/O board Main logic board Main logic board extractor lever Plugging in the Main Logic Board FIGURE 11-18 6. Reconnect all cables that attach to the main logic board. Each connector is keyed to fit one way only. For connector locations, see FIGURE 11-12 FIGURE 11-13 a.

  • Page 153: Removing The Nvram

    Detaching the wrist strap Closing the system unit Reconnecting system components 9. Refer to Chapter 6 “Power Off and On” to turn the power on. 11.5 Nonvolatile RAM (NVRAM) This section describes the removal and replacement procedures for the NVRAM chip.

  • Page 154: Figure 11-19 Locating The Nvram

    under these conditions. Disconnect the AC power cord prior to handling the power supply. When servicing any other system component, the AC power cord should remain connected and poses no safety hazard. 2. Locate the NVRAM chip carrier on the main logic board. FIGURE 11-19 3.

  • Page 155: Figure 11-21 Default Sparcstation Lx Isdn Jumper Settings

    11.5.2 Replacing the NVRAM To install the NVRAM on the main logic board: 1. Hold the NVRAM chip on both sides of the carrier. 2. Carefully align the pins and insert the NVRAM chip into its socket. The carrier is keyed so the NVRAM can be installed only one way. 3.

  • Page 156: Table 11-3 Sparcstation Lx Isdn Jumper Settings

    The SPARCstation LX system board is delivered with the jumpers set for termination on the system board. For more information about setting these jumpers, the Sun ISDN-BRI/SBI Hardware Configuration Guide. SPARCstation LX ISDN Jumper Settings TABLE 11-3 Address Jumper Pins...

  • Page 157: Illustrations Of Selected Crus

    C H A P T E R Illustrated Parts Breakdown This chapter provides an illustrated parts breakdown (IPB) of the major parts that comprise the SPARCclassic, SPARCclassic X, and SPARCstation LX systems, and a list of customer replaceable units and their part numbers. Section 12.1 “Illustrations of Selected CRUs”...

  • Page 158: Figure 12-1 Exploded View Of The Unit Top

    Hard drive data cable Diskette drive Diskette drive data cable (hidden) Hard drive power connect Keyboard soft power-on cable Main logic power cable Drive mounting bracket Hard disk drive Diskette drive power cable Power supply Hard drive power cable Exploded View of the Unit Top FIGURE 12-1 12-2 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual •...

  • Page 159: Figure 12-2 Exploded View Of The Unit Bottom

    NVRAM/TOD Keyboard soft power-on cable Main logic power cable Diskette drive Security loop data cable Hard drive data cable Internal speaker and power LED assembly System I/O board Main logic board extractor lever UNIT BOTTOM Exploded View of the Unit Bottom FIGURE 12-2 Chapter 12 Illustrated Parts Breakdown...
  • Page 160 Screw holes Drive select switch (hidden from view) Diskette drive power cable Diskette drive data cable Pull tab Screw holes Diskette drive Cable management guides Captive screw Drive mounting bracket Exploded View of the Disk Drive Mounting Bracket FIGURE 12-3 12.2 Replacement Part List provides the part numbers for customer replaceable units,...

  • Page 161: Table 12-1 Part Number List-Customer Replaceable Units

    Note – Although the part numbers are correct as of the publication date of this document, they are subject to change. Consult your authorized Sun sales representative or service provider to confirm part numbers before you order new or replacement parts.
  • Page 162 Part Number List—Customer Replaceable Units (Continued) TABLE 12-1 Item Description Sun Part No. AUI/Audio Adapter Cable 530-1856 AUI Adapter Cable 530-2021 Serial Interface Y-Cable 530-1869 SunMicrophone 370-1414 ISDN Cable (4.0 m) 530-1871 Twisted-Pair Ethernet Cable 530-1871 Keyboard Cable 530-1442 Type-4 Mouse/Type-4 Pad...

  • Page 163: Table 12-2 Part Number List-Miscellaneous Items

    Description Sun Part No. Wrist Strap 250-1007 Vertical Stand (side piece) 330-1455 Vertical Stand (base piece) 330-1458 Antistatic Mat with Sun Logo 250-1088 Disposable Antistatic Mat 330-1145 ISDN Enabling Kit 595-2459 Disk Drive Bracket Shoulder Screw 240-2145 Part Number List—Related Hardware Documentation...
  • Page 164 Part Number List—Related Hardware Documentation (Continued) TABLE 12-3 Item Description Sun Part No. SPARCclassic X Upgrade Guide 801-4721 Installing SPARCclassic/SPARCclassic X/SPARCstation LX SIMMs 801-2211 Sun ISDN-BRI/SBIH Hardware Configuration Guide 800-6863 12-8 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...

  • Page 165: Table A-1 Input Power Requirements And Power Dissipation

    A P P E N D I X System Specifications This appendix contains system specifications, including input power requirements, environmental requirements, physical specifications, and regulatory compliance information. All specifications are applicable to both SPARCclassic and SPARCstation LX systems. Not all specifications will be applicable to the SPARCclassic X terminal, which does not come equipped with a diskette drive or hard disk drive.

  • Page 166: Table A-2 Environmental Requirements

    1. Maximum input current with accessory connected to accesory outlet is 6A Environmental Requirements lists the environmental requirements for both operating and non-operating TABLE A-2 environments. Environmental Requirements TABLE A-2 Operating Environment: Temperature 10 to 40˚C (50 to 104˚F) Humidity 20 to 80% relative noncondensing at 40˚C (104˚F) Wet Bulb...

  • Page 167: A.3 Physical Specifications

    Physical Specifications lists the physical specifications for the system unit, keyboard, and optical TABLE A-3 mouse. Physical Specifications TABLE A-3 Height Width Depth Net Weight Component inches (mm) inches (mm) inches (mm) lbs (kg) System Unit 4.6 (118) 9.6 (245) 10.4 (264) 11.0 (4.95) Keyboard, Type 5...
  • Page 168 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993...

  • Page 169: System Connectors

    A P P E N D I X System Connectors This appendix contains pinouts and illustrations of the various system connectors. The following connectors are described. Section B.1 “Attachment Unit Interface (AUI) Connector” Section B.2 “Twisted-Pair Ethernet Connector” Section B.3 “ISDN Terminal Endpoint Connector” Section B.4 “ISDN Network Termination Connector”...

  • Page 170: Figure B-1 Attachment Unit Interface (Aui) Connector

    Attachment Unit Interface (AUI) Connector Attachment Unit Interface (AUI) Connector FIGURE B-1 Pinout for Attachment Unit Interface (AUI) Connector TABLE B-1 Description Description AUI_DO_L AUI_DO AUI_DI AUI_DI_L AUI_CI_L AUI_CI ENET_PWR EMCTL RESET_SENSE_L CHIDX CHIDR CHI_CLK CHIDFS CODFS CODCK Codec_PWR_DN_L MIDI_OUT MIDI_IN MIDI_IN_L SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual •...

  • Page 171: Figure B-2 Twisted-Pair Ethernet Connector

    Twisted-Pair Ethernet Connector Twisted-Pair Ethernet Connector FIGURE B-2 Pinout for Twisted-Pair Ethernet Connector TABLE B-2 Description Description Transmit Data + Transmit Data - Receive Data - Receive Data + ISDN Terminal Endpoint Connector ISDN Terminal Endpoint Connector FIGURE B-3 Pinout for ISDN Terminal Endpoint Connector TABLE B-3 Description Description...

  • Page 172: Figure B-4 Isdn Network Termination Connector

    ISDN Network Termination Connector ISDN Network Termination Connector FIGURE B-4 Pinout for ISDN Network Termination Connector TABLE B-4 Description Description Transmit Data - PS1- Receive Data - Receive Data + PS2- Transmit Data + Note – The +5 Volt line is fuse-protected. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual •...

  • Page 173: Figure B-5 Keyboard/Mouse Connector

    Keyboard/Mouse Connector Keyboard/Mouse Connector FIGURE B-5 Pinout for Keyboard/Mouse Connector TABLE B-5 Description Description Ground Keyboard Out Ground Keyboard In +5 Vdc KBD_PWR_ON_L Mouse In +5 Vdc Note – All signals are standard TTL levels. The +5V supply is fuse-protected. Appendix B System Connectors...

  • Page 174: Figure B-6 External Scsi Connector

    SCSI Connector (External) External SCSI Connector FIGURE B-6 Pinout for External SCSI Connector TABLE B-6 Description Description Ground sd0* Ground sd1* Ground sd2* Ground sd3* Ground sd4* Ground sd5* Ground sd6* Ground sd7* Ground sdp* Ground Ground Ground Ground TermPWR Ground Ground Ground...

  • Page 175: Figure B-7 Serial Connector

    Pinout for External SCSI Connector (Continued) TABLE B-6 Description Description Ground Ground req* Ground Note – Pin 38 is +5V, fused and supplied by a schottkey diode. Serial Connector Serial Connector FIGURE B-7 Pinout for Serial Connector TABLE B-7 Description Description B Transmit Data A Transmit Data...

  • Page 176: Figure B-8 Parallel Connector

    Parallel Connector Parallel Connector FIGURE B-8 Pinout for Parallel Connector TABLE B-8 Description Description Strobe AutoFxDt Data 0 (LSB) Error Data 1 Init Data 2 SlctIn Data 3 Ground Data 4 Ground Data 5 Ground Data 6 Ground Data 7 Ground Ground Busy...

  • Page 177: Figure B-9 13W3 Video Connector

    13W3 Video Connector 13W3 Video Connector FIGURE B-9 Pinout for 13W3 Video Connector TABLE B-9 Description Description Video-Red Composite Sync Video-Green Ground Video-Blue Ground Ground Sense(1) Ground Sense(0) Sense(2) Ground Ground B.10 Audio Ports and Audio Module B.10.1 Audio Ports The audio ports are on all models with the SPARCclassic/SPARCclassic X/ SPARCstation LX system board (on the SPARCclassic X terminal the ports are covered and inactive).

  • Page 178: Figure B-10 Audio Ports

    Audio Ports FIGURE B-10 Audio Ports TABLE B-10 Line-Out Line-In Left Channel Left Channel Right Channel Right Channel Return Return B.11 Signals for the Audio Ports B.11.1 Audio Line-Out Connector Audio Line-out Connector FIGURE B-11 This connector is used to connect the system audio output to a stereophonic amplifier and external loudspeakers.

  • Page 179: Figure B-13 Internal Scsi Connector

    This connector is used to connect external sound sources such as a compact disc player or cassette tape player to the system. B.12 SCSI Connector (Internal) Internal SCSI Connector FIGURE B-13 Pinout for Internal SCSI Connector TABLE B-11 Description Description Ground +5 VDC sd0*...
  • Page 180 Pinout for Internal SCSI Connector (Continued) TABLE B-11 Description Description Ground Ground Ground reg* Ground B.13 Diskette Drive Connector (Internal) Diskette Drive Connector FIGURE B-14 Pinout for Diskette Drive Connector TABLE B-12 Description Description eject direction Ground Ground step Ground Ground write data Ground...

  • Page 181: Figure B-15 Sbus Connector

    Pinout for Diskette Drive Connector (Continued) TABLE B-12 Description Description Ground Ground hd select motor Ground Ground disk change B.14 SBus Connector (Internal) SBus Connector FIGURE B-15 Pinout for SBus Connector TABLE B-13 Description Description Description Description Ground sb_d(31) sb_clk sb_d(30) sb_br* sb_siz(0)

  • Page 182: Figure B-16 Power Connector

    Pinout for SBus Connector (Continued) TABLE B-13 Description Description Description Description sb_irq4* sb_ack8* +5 VDC +5 VDC sb_d(19) sb_pa(18) sb_d(18) sb_pa(19) sb_d(21) sb_pa(20) sb_d(20) sb_pa(21) sb_d(23) sb_pa(22) sb_d(22) sb_pa(23) sb_irq5* sb_ack32* Ground Ground sb_d(25) sb_pa(24) sb_d(24) sb_pa(25) sb_d(27) sb_pa(26) sb_d(26) sb_pa(27) sb_d(29) N.C.
  • Page 183 A P P E N D I X On-Board Diagnostics This appendix explains On-Board Diagnostic tests. The following topics and tests are described. Section C.1 “Running the On-Board Diagnostics” Section C.1.1 “Test <alias name>, Test <device path>” Section C.1.2 “Test-all” Section C.1.3 “Watch-clock”...
  • Page 184 2. Return to the operating system environment. If you are in a windowing environment, exit from it and wait for the operating system prompt to appear. See the documentation supplied with your windowing system. 3. Halt the operating system. See the documentation supplied with your operating system for instructions on how to halt it.
  • Page 185 The following example shows a list of On-Board Diagnostic tests. Note – There are no “SCSI device” or “floppy disk drive” tests for the SPARCclassic X terminal. ok help diag Category: Diag (diagnostic routines) test device-specifier ( -- ) run selftest method for specified device Examples: test /memory - test memory...
  • Page 186 C.1.2 Test-all The test-all command tests all devices in the system that have a self-test program. Tests are executed in order, using the device tree (viewed with the show-devs command) as reference. Disks, tapes, and CD-ROMs are not tested by test-all. C.1.3 Watch-clock This test reads a register in the NVRAM/TOD (Nonvolatile RAM/Time of Day) chip...
  • Page 187 For example: ok watch-net Internal loopback test -- succeeded. External loopback test -- Auto-selecting Ethernet cable I/F Trying AUI Received packet on AUI Select cable - AUI succeeded. Looking for Ethernet packets. ’.’ is a good packet. "X" is a bad packet. Type any key to stop.
  • Page 188 For example: ok watch-tpe Internal loopback test -- succeeded. External loopback test -- succeeded. Looking for Ethernet packets. ‘.’ is a good packet. ‘X’ is a bad packet. Type any key to stop..............The watch-net-all command monitors Ethernet packets on any Ethernet interface installed in the system.
  • Page 189 C.1.5 Probe-scsi, Probe-scsi-all The probe-scsi test sends an inquiry command to internal and external SCSI devices connected to the system’s on-board SCSI. This test is not applicable to the SPARCclassic X terminal. If a SCSI device is connected and powered up, the target address, unit number, device type, and manufacturer name should be displayed.
  • Page 190 To change the amount of memory tested using the selftest-#megs parameter, type this command: ok setenv selftest-#megs 16 This sets the desired memory size to 16 megabytes. Any whole number may be used as long as it does not exceed the actual size of memory (in megabytes) installed in the system.
  • Page 191 Glossary Attachment Unit Interface is an Ethernet adapter cable. address A location within a computer system’s memory. The word location is a synonym. Reference is usually made to an address for the purpose of retrieving or storing information. board See printed circuit board. boot To load the system software into memory and start it running.
  • Page 192 Desktop Storage Module An external data storage that contains a disk drive or a tape drive. Desktop Storage Pack (DSP) A generic name for an external unit containing a tape drive, a disk drive, or a CD-ROM drive that can be connected to a Desktop SPARCstation. The external unit containing the tape drive is referred to as the Desktop Backup Pack.
  • Page 193 Light-Emitting Diode. monitor (1) Indicated by the > prompt. From the > prompt, you can boot the system, continue the execution of a halted program, or enter the Forth Toolkit. If disaster befalls your operating system, the monitor automatically starts. monitor (2) A video display unit that is part of a Desktop SPARCstation.
  • Page 194 terminal A device comprising a video display and keyboard that are used to type and display information. A terminal may be connected to either of the RS-232 serial interface ports on the back panel of the SPARCstation system unit. It is not synonymous with the term monitor.
  • Page 195 Index SYMBOLS color frame buffer board, 1-6 connectors /etc/remote, 3-5 audio ports, B-9 external audio line-in, B-11 audio line-out, B-10 access, to subassemblies, 7-1 internal attachment unit interface (AUI), See AUI diskette drive pinout, B-12 audio ports connector, B-9 power pinout, B-14 AUI, C-5 SBus pinout, B-13 autoboot switch, 2-5...
  • Page 196 internal, 1-4, 10-4 diskette drive, 1-7 Forth Toolkit, 2-7 hard disk drive, 1-7 frame buffer board, 1-6 Diagnostic Executive, 2-10 diagnostics boot PROM, 2-1 default boot mode, 2-1 defective CRUs, 2-10 graphics I/O devices, 1-7 firmware, 2-1 grounding strap, 7-4 on-board, C-1 GX graphics accelerator board, 1-6 SBus device probe, 2-4...
  • Page 197 scsi, 2-8 tape0, 2-9 light emitting diode (LED), 8-4 ttya, 2-9 ttyb, 2-9 opening, system unit, 7-2 operating system, halting, 6-3 main logic board (MLB), See MLB options, 1-7 memory, 1-5 address ranges, 4-8 configuration, 1-5 error reporting, 4-7 part numbers location "U"...
  • Page 198 requirements power supply, 4-3 environmental, A-2 test points, 11-18 input power, A-1 test<device path>, C-3 test-all, C-3, C-4 test-memory, C-7 thick Ethernet, C-5 tip, 3-5 safety precautions (table), 10-3 tip window, 3-5 SBus tools needed to replace CRUs, 5-3 boards, 1-5 troubleshooting, 2-1 cards, 1-5 turning off power, 6-2, 6-4...

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