Page 1 SPARCclassic/SPARCclassic X/ SPARCstation LX Service Manual A Sun Microsystems, Inc. Business 901 San Antonio Road Palo Alto, , CA 94303-4900 Part No: 801-2176-13 Revision A, November 1993...
Page 2 USA 650 960-1300 fax 650 969-9131...
Page 3 SPARCclassic/SPARCclassic X/ SPARCstation LX Service Manual Part No: 801-2176-13 Revision A, November 1993...
Page 4 52.227-14(g)(2)(6/87) and FAR 52.227-19(6/87), or DFAR 252.227-7015(b)(6/95) and DFAR 227.7202-3(a). Sun, Sun Microsystems, the Sun logo, and Solaris are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and in other countries. All SPARC trademarks are used under license and are trademarks or registered trademarks of SPARC International, Inc.
Page 5: Table Of Contents
Contents Preface x Product Description 1 System Unit 1 Main Logic Board 4 Memory Modules 5 Nonvolatile RAM (NVRAM) 6 Internal Hard Disk Drive 6 Internal Diskette Drive 7 Power Supply 7 Monitors, Keyboard, and Mouse 7 External Storage Devices 8 System Interconnections 8 Troubleshooting Overview 11 Default Boot Mode 11...
Page 6 Safety Requirements 41 Symbols 42 System Precautions 43 Tools Required 43 Power Off and On 45 Powering Off the System 45 Powering Off When the System Is Working Normally 45 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 7 Powering Off When the System Does Not Respond Normally Powering On the System 48 Internal Access 51 Disconnecting the External Cables 51 Opening the System Unit 52 Attaching the Wrist Strap 53 Closing the System Unit 55 Reconnecting the External Cables 57 Major Subassemblies 59 Power Supply 59 Removing the Power Supply 60...
Page 8 Removing the Main Logic Board 132 Installing the New Main Logic Board 136 Nonvolatile RAM (NVRAM) 138 Removing the NVRAM 138 Replacing the NVRAM 140 SPARCstation LX ISDN Jumper Settings 140 Illustrated Parts Breakdown 143 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 9 Illustrations of Selected CRUs 143 Replacement Part List 146 System Speciﬁcations 153 Input Power Requirements 153 Environmental Requirements 154 Physical Speciﬁcations 155 Regulatory Compliance 155 System Connectors 157 Attachment Unit Interface (AUI) Connector 158 Twisted-Pair Ethernet Connector 159 ISDN Terminal Endpoint Connector 159 ISDN Network Termination Connector 160 Keyboard/Mouse Connector 161 SCSI Connector (External) 161...
Page 10 Test <alias name>, Test <device path> 175 Test-all 176 Watch-clock 176 Watch-net, Watch-aui, Watch-tpe and Watch-net-all 176 Probe-scsi, Probe-scsi-all 178 Test-memory 178 Returning to the Monitor Prompt 179 Glossary 181 Index 185 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 11: Preface
This book is divided into seven parts. A table at the beginning of each part lists the chapters, sections and their page numbers. 4 Part 1, “System Information,“ describes an overview of the SPARCclassic SPARCclassic X/SPARCstation product line’s standard features, and its external options.
Page 12 Book titles, new words or terms, or Read Chapter 6 in User’s Guide. AaBbCc123 emphasized words These are called class options. You must be root to do this. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 13 Typographic Conventions TABLE P–1 (continued) Typeface or Symbol Meaning Example Code samples are included in boxes and may display the following: UNIX C shell prompt system% UNIX Bourne and Korn shell UNIX Bourne and Korn shell prompt prompt Superuser prompt, all shells Superuser prompt, all shells Mouse buttons are referred to in this way:...
Page 14 4 Desktop SPARC Hardware Owner’s Guide provides step-by-step instructions on how to install the system’s hardware and software. 4 Using a SPARCclassic X Terminal contains instructions on how to install the SPARCclassic X hardware. 4 Installing SPARCclassic/SPARCclassic X/SPARCstation LX SIMMs provides step-by-step information on how to install DSIMMs and VSIMMs in these systems.
Page 15: Product Description
4 “External Storage Devices” on page 8 4 “System Interconnections” on page 8 The SPARCclassic or the SPARCstation LX systems also can have an external storage device or other small computer system interface (SCSI), serial, or parallel port devices attached. The SPARCclassic X terminal software does not currently support external devices.
Page 16 Figure 1–1 Front Panel of the SPARCclassic and SPARCstation LX System Units 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:...
Page 17 Figure 1–2 Rear Panel of the System Unit Product Description...
Page 18: Main Logic Board
(see Figure 1–2). The different SPARCclassic/SPARCclassic X/SPARCstation LX MLB layouts are in Chapter 10. Figure 10–1 shows a simpliﬁed layout of the SPARCclassic and the SPARCclassic X main logic board, while Figure 10–2 and Figure 10–3 show the SPARCstation LX main logic boards.
Page 19: Memory Modules
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.
Page 20: Nonvolatile Ram (Nvram)
Figure 1–5 Typical SBus Card 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. 4 GX Graphics Accelerator Card – This card controls the video output from the system unit, and accelerates the generation of graphic images.
Page 21: Internal Diskette Drive
(types HD, 2HD, and 2DD) and supports densities of 720 kilobytes, 1.2 megabytes, and 1.44 megabytes. The diskette drive is optional on both SPARCclassic and SPARCstation LX systems. It is not available for the SPARCclassic X terminal. Power Supply The 70-watt power supply is housed in the unit top.
Page 22: External Storage Devices
Desktop SPARC Hardware Owner’s Guide or Using a SPARCclassic X Terminal. Note - The external drive in Figure 1–6 is not part of the SPARCclassic X terminal. See Figure 1–2 and Figure 1–3 for differences between the SPARCclassic X terminal and the SPARCclassic workstation.
Page 23 Figure 1–6 Connecting the Major System Components Product Description...
Page 24 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 25: Troubleshooting Overview
Default Boot Mode The ﬂowchart in Figure 2–1 outlines the roles played by various diagnostics during the default boot mode’s operation. Note - The operating system diagnostic tools, as indicated in Figure 2–1, do not apply to the SPARCclassic X terminal.
Page 26: Boot Prom Diagnostics
SCSI, memory, and diskette drive tests. See Appendix C,” for more information. Note - The SCSI and diskette drive controller tests do not apply to the SPARCclassic X terminal. The following sections describe the relationship between the various diagnostic tools and the role each tool plays during the default boot mode.
Page 27 Figure 2–1 Default Boot Mode Troubleshooting Overview...
Page 28: Low-Level Post Code
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. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 29 NVRAM Parameters Used During POST and Boot Sequence TABLE 2–1 NVRAM Parameter Description This parameter determines how many megabytes of selftest-#megs memory to test during high-level POST. The minimum Default = 1 is zero; the maximum is the amount actually installed in the system.
Page 30: Diagnostic Tools And When To Use Them
Table 2–3 provides a summary of the available diagnostic tools and describes when to use each tool. 1. The boot parameters represented here are default settings. The defaults may be changed by following the procedures listed in the Open Boot Command Summary. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 31 (The SCSI and diskette drive controller tests do not apply to the SPARCclassic X terminal.) You must be at the ok prompt (the Forth Toolkit) to run the On-Board Diagnostics. Enter n at the > prompt to enter the Forth Toolkit.
Page 32: Power-On Self-Test
For more information about the POST, see Chapter 3. Selected On-Board Tests For information about how to run the On-Board Diagnostics, see Appendix C. Table 2–4 lists speciﬁc on-board diagnostic tests for SPARCclassic and SPARCstation LX systems. On-Board Diagnostics TABLE 2–4...
Page 33: Sundiag System Exerciser
If the error messages are not descriptive enough, you may need to run POST or the SunDiagnostic Executive. Note - The Sundiag System Exerciser is not applicable to the SPARCclassic X terminal. Troubleshooting Overview...
Page 34: Forth Toolkit
POST, see “Power-On Self-Test (POST)” on page 21. The SunDiagnostic Executive is described in the SunDiagnostic Executive User’s Guide for the SPARCstations. Note - The SunDiagnostic Executive is not applicable to the SPARCclassic X terminal. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 35: Power-On Self-Test (Post)
CHAPTER 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. 4 “Power-On Self-Test (POST)” on page 21 4 “Normal Mode” on page 23 4 “Full Diagnostic Mode” on page 24 4 “Abbreviated Diagnostic Mode”...
Page 36 Num Lock LED is lit. Main logic board Scroll Lock LED is lit. NVRAM Compose LED is lit. DSIMM U0303 or U0304 Compose LED is lit Last installed memory bank (ROM 2.14 or later). SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 37: Normal Mode
The Caps Lock LED is not used as a failure indicator; it ﬂashes on and off to indicate that the POSTs are running. The keyboard LED diagnostics feature described here applies only to a SPARCclassic or SPARCstation LX system with a 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 38: Full Diagnostic Mode
Setting Up a tip Connection to Another Workstation You can use the serial port on your SPARCstation to connect to another Sun workstation (either the same type of SPARC system or a different type of Sun SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 39: Tests The Post Runs
workstation or server system). This connection lets you use a shell window on the Sun workstation as a terminal to the SPARCstation 10 being tested. The tip method is recommended, because it lets you use SunOS windowing and operating system features to help you work with the boot PROM. To make a tip connection, follow these steps: 1.
Page 40 SBus Read Time-out Test EBus Read Time-out Test D-Cache RAM NTA Test D-Cache TAG NTA Test I-Cache RAM NTA Test I-Cache TAG NTA Test Memory Address Pattern Test FPU Register File Test SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 41 Listing of POST Tests TABLE 3–2 (continued) FPU Misaligned Reg Pair Test FPU Single-precision Tests FPU Double-precision Tests FPU SP Invalid CEXC Test FPU SP Overflow CEXC Test FPU SP Divide-by-0 CEXC Test FPU SP Inexact CEXC Test FPU SP Trap Priority > Test FPU SP Trap Priority <...
Page 42: Post Error Messages
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. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 43: Status Lights (Leds) And Indicators
Status Lights (LEDs) and Indicators The LED at the front of the chassis lights up when the system is operating normally. Figure 3–3 shows the location of the system LED. Chapter 4,” shows ﬂow diagrams of actions to take when the system LED is not lit. Figure 3–3 System Power LED on Front of System This section describes the keyboard LED sequences displayed at power up when...
Page 44 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. See “System Board Test” on page 35, for troubleshooting information. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 45: Troubleshooting Procedures
CHAPTER 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. 4 “No Video Output on the System Monitor” on page 32 4 “Power-On Does Not Succeed”...
Page 46: No Video Output On The System Monitor
2. Verify that the wall outlet is supplying AC power to the monitor. Use a Volt Ohmmeter (VOM). 3. Verify that the video cable connection is secure between the monitor and the system video output port. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 47: Power-On Does Not Succeed
Use a VOM to perform the continuity test on the video cable. If the power cord and video cable connection are good and there is still no video output, reseat the video card for the monitor. 4. If the monitor power supply is internally fused, check the fuse. The fuse could be blown.
Page 48 Note - The power supply connector (J1401 for SPARclassic and SPARCclassic X or J1601 for SPARCstation LX) must remain connected to the system board. 2. Replace the power supply assembly if any of the voltages are not present. See “Power Supply” on page 59.
Page 49: System Board Test
Power Supply Connector Pin Assignments TABLE 4–2 (continued) Description Description Ground Ground +12 Vdc +12 Vdc -12 Vdc 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 “Setting Up a tip Connection to Another Workstation”...
Page 50: Disk Drive Errors
To test additional SCSI host adapters added to the system, use the probe-scsi-all command. Refer to “Probe-scsi, Probe-scsi-all” on page 178. 1. At the ok prompt, type probe-scsi. See the following example. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 51: Determining Faulty Dsimm Locations
ok probe-scsi Target 1 Unit 0 Disk SEAGATE ST1480 SUN0424 Copyright (c) 1991 Target 3 Unit 0 Disk SEAGATE ST1480 SUN0424 Copyright (c) 1991 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.
Page 52 U0304. Follow the instructions in “Removing a DSIMM” on page 120 for removing the defective DSIMM at that location. Then, to install the replacement, follow the instructions in “Replacing a DSIMM” on page 122. Figure 4–2 DSIMM Slot Locations SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 53 Physical Memory Address Ranges for 4-Mbyte and 16-Mbyte SIMMs TABLE 4–4 Physical Memory Address Ranges Bank SIMM # 4-Mbyte SIMMs 16-Mbyte SIMMs U0304 0000000 through 07FFFFF 0000000 through 1FFFFFF U0303 0000000 through 07FFFFF 0000000 through 1FFFFFF U0301 2000000 through 27FFFFF 2000000 through 3FFFFFF U0302 2000000 through 27FFFFF...
Page 54 Both DSIMMs in a memory bank have the same physical address range. The last digit in the physical address reported determines which of the two DSIMMs in a bank caused the memory error (see Table 4–6). SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 55: Safety And Tools Requirements
CHAPTER 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. 4 “Safety Requirements” on page 41 4 “Symbols” on page 42 4 “System Precautions”...
Page 56: Symbols
This equipment contains lethal voltages. Accidental contact can result in serious injury or death. Caution - Physical danger due to a non-electrical hazard or danger of irreversible damage to data or to the operating system. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 57: System Precautions
®® 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. Caution - Before you begin, carefully read each of the procedures in this manual. If you have not performed similar operations on comparable equipment, do not attempt to perform these procedures.
Page 58 4 Sun electrical static discharge (ESD) mat with Sun logo. Contact your Sun sales representative to purchase it. 4 Disposable ESD mat. You can purchase it through your Sun sales representative. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 59: Power Off And On
CHAPTER Power Off and On This chapter explains steps to perform before removing a customer replaceable unit (CRU). 4 “Powering Off the System” on page 45 4 “Powering On the System” on page 48 Powering Off the System Before you begin any removal or replacement procedure, you must halt the system in an orderly manner.
Page 60 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. The system responds with an OK> prompt. You can then skip to Step 5 of this procedure.
Page 61: Powering Off When The System Does Not Respond Normally
Then try pressing Stop-a once more. Note - Steps 3 through 6 are not necessary for the SPARCclassic X terminal. When the ok or > prompt appears, boot the operating system. Enter boot at the ok prompt or b at the > prompt.
Page 62: Powering On The System
This pause prevents possible damage to power supply components in your system unit. After turning off the power to replace a part, restarting the system is relatively simple: SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 63 1. Reconnect the cables. See “Reconnecting the External Cables” on page 57. 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.
Page 64 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 65: Internal Access
CHAPTER 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. 4 “Disconnecting the External Cables” on page 51 4 “Opening the System Unit” on page 52 4 “Attaching the Wrist Strap”...
Page 66: Opening The System Unit
Note - The unit top contains the power supply and disk drive, and is the heavier of the two sections. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 67: Attaching The Wrist Strap
Figure 7–1 Opening the System Unit 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. See “Closing the System Unit” on page 55 for instructions. Attaching the Wrist Strap A wrist strap (or grounding strap) provides grounding for static electricity between your body and the chassis of the system unit.
Page 68 1. Unwrap the grounding strap from your wrist. 2. Detach the end with the adhesive copper strip from the metal casing of the power supply in the top of the system unit. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 69: Closing The System Unit
Closing the System Unit To close the system unit: 1. Preparation. a. Check that there are no loose tools or screws in the unit. b. Check that all SBus cards and SIMMs are seated properly. c. Check that all internal cable connections are tight. d.
Page 70 Figure 7–3 Closing the System Unit SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 71: Reconnecting The External Cables
Reconnecting the External Cables Refer to Figure 7–4 to reconnect the system cables. Figure 7–4 Reconnecting System Components Internal Access...
Page 72 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 “Powering On the System” on page 48. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 73: Major Subassemblies
CHAPTER Major Subassemblies This chapter describes how to remove and replace the system unit’s major subassemblies. 4 “Power Supply” on page 59 4 “Speaker/Power LED Assembly” on page 62 4 “System I/O Board” on page 65 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).
Page 74: Removing The Power Supply
Lift the power supply straight up and out. If the power supply does not lift easily, be sure that it has cleared the hooks. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 75: Replacing The Power Supply
Figure 8–1 Removing and Replacing the Power Supply 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. Align the holes in the bottom of the power supply with the hooks in the system unit top (see Figure 8–1).
Page 76: Speaker/Power Led Assembly
(see Figure 8–8). Removing the Speaker/Power LED Assembly To remove the speaker/power LED assembly: 1. Prepare to work on the system as described in Chapter 6, and in Chapter 7. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 77 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 “Attaching the Wrist Strap” on page 53. Caution - The AC power cord should remain attached between the system unit and an AC wall outlet.
Page 78: Replacing The Speaker/Power Led Assembly
3. Reconnect the speaker/LED cable to its connector on the main logic board. The connector is keyed to ﬁt only one way. For the connector location, see Chapter 11. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 79: System I/O Board
4. Refer to Chapter 7 to perform the following procedures: 4 Detaching the wrist strap 4 Closing the system unit 4 Reconnecting system components 5. Refer to Chapter 6 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 Figure 8–3).
Page 80 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. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 81 Figure 8–3 System I/O Board and Unit Bottom 2. Place an antistatic mat, shiny side down, next to the system unit. 3. Remove any SBus cards installed in the system unit. See “SBus Cards” on page 107 for removal procedures. 4.
Page 82 (see Figure 8–6). Avoid handling any of the delicate electronic components or touching any of the circuit board traces. 4. Place the main logic board on an antistatic mat. Figure 8–4 Extracting the Main Logic Board SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 83 Figure 8–5 Raising the Speaker/LED Assembly Major Subassemblies...
Page 84 Removing and Replacing the Main Logic Board 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. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 85: 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 Figure 8–7). Take care to remember where each screw belongs. 3. Pull the system I/O board away from the back panel to remove it. Figure 8–7 Removing the System I/O Board Replacing the System I/O Board...
Page 86 Connect the LED/speaker cable to its mating connector on the main logic board. d. Connect the diskette drive and hard disk drive data cables to their connectors at the front of the main logic board. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 87 Figure 8–8 Plugging in the Main Logic Board 4. Reinstall any SBus cards (if applicable). See “Replacing SBus Cards” on page 110 for installation details. 5. Refer to Chapter 7” to perform the following procedures: 4 Detaching the wrist strap 4 Closing the system unit 4 Reconnecting system components 6.
Page 88 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 89: Storage Devices
CHAPTER Storage Devices This chapter includes information about how to replace the system storage drives. 4 “Hard Disk Drive” on page 75 4 “Disk Drive Bracket” on page 91 4 “Diskette Drive” on page 96 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 90: Removing A Hard Disk Drive
6. Remove the four screws securing the hard drive to the drive bracket. 7. Lift the hard drive straight up to remove it from the system unit. Place the drive on the antistatic mat. This completes the hard disk drive removal process. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 91: Preparing A Hard Drive For Installation
Figure 9–1 Hard Disk Drive in the Disk Drive Bracket Preparing a Hard Drive for Installation To prepare a hard drive for installation, you must ﬁrst verify that the SCSI ID jumpers on the drive controller board are set correctly. After you are satisﬁed that the SCSI ID jumpers are correct, follow the directions later in the chapter for installing the hard drive.
Page 92 Compare the jumper settings in the ﬁgure to the settings on your drive. c. If the settings are not the same, change them to match the settings in the ﬁgure. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 93 Figure 9–2 Jumper Settings for 207-Mbyte Drive With Jumpers on the Left-Hand Side Storage Devices...
Page 94 Figure 9–3 Jumper Settings for 207-Mbyte Drive With Jumpers on the Right-Hand Side SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 95 Figure 9–4 Jumper Settings for 424-Mbyte Drive Storage Devices...
Page 96 Figure 9–5 Jumper Settings for Conner 535-Mbyte Drive Table 9–1 describes the 535-megabyte Conner drive’s factory jumper settings. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 97 535-Mbyte Conner Drive Conﬁguration Jumpers TABLE 9–1 Pin Pair Description Factory Set SCSI ID address SCSI ID address SCSI ID address Wait spin disabled Disk power termination SCSI bus power termination Figure 9–6 Jumper Settings for Seagate 535-Mbyte Drive Storage Devices...
Page 98 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 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 99 Figure 9–7 Jumper Settings for 1.0-Gbyte Drive (Part 370-1546) Storage Devices...
Page 100 Table 9–3 describes the 1.0-gigabyte Seagate drive’s factory jumper settings. 1.0-Gbyte Seagate Drive Conﬁguration Jumpers TABLE 9–3 Abbreviation Description Factory Set (Reserved) Delayed start Motor enable Write protect Parity enable SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 101 1.0-Gbyte Seagate Drive Conﬁguration Jumpers TABLE 9–3 (continued) Abbreviation Description Factory Set Termination enable Termination power from drive Termination power to SCSI Figure 9–9 Jumper Settings for Connor 1.0-Gbyte Drive Table 9–4 describes the 1.0-gigabyte Connor drive’s factory jumper settings. Storage Devices...
Page 102: Installing A Hard Disk Drive
4. If the drive bracket has grommets, insert a shoulder screw into each grommet, leaving enough clearance for the drive to be lowered into the bracket. 5. Lower the hard drive into the bracket and tighten the four screws. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 103 Note - The drive may not sit perfectly ﬂat until it is completely fastened. Figure 9–10 Installing a Hard Disk Drive 6. Attach the hard drive data cable to the data cable connector on the disk drive. The location of the data connector on the disk drive is shown in Figure 9–10. The data cable connector is keyed to ﬁt only one way.
Page 104 See Figure 9–11 for the connector’s location. The connector is keyed to ﬁt only one way. Figure 9–11 Main Logic Board This completes the procedure for installing the disk drive. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 105: Disk Drive Bracket
Disk Drive Bracket The disk drive bracket resides in the top part of the system unit in front of the power supply (see Figure 9–13). It houses both the diskette drive and the hard disk drive. The hard drive may be removed independently of the disk drive mounting bracket, but you must remove the disk drive bracket before removing the diskette drive or power supply.
Page 106 (see Figure 9–12). Note - When pulling up the data cable’s pull tab, brace the main logic board near the socket to minimize board ﬂex. Figure 9–12 Open View of System Unit SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 107 4. Loosen the captive Phillips-head screw that secures the disk drive mounting bracket to the system chassis. See Figure 9–13 and Figure 9–14 for the screw’s location. Lift up the bracket as you loosen the screw until the bracket disengages from the unit top.
Page 108: Replacing The Disk Drive Mounting Bracket
3. Tighten the captive screw. Tighten the captive Phillips-head screw at the center rear of the bracket to secure it to the chassis. Be careful not to overtighten the screw or damage may result. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 109 Figure 9–15 Replacing the Disk Drive Mounting Bracket 4. Reconnect the cables (see Figure 9–15). Each connector is keyed to ﬁt only one way. For connector locations on the main logic board, see Chapter 11. a. Connect the power cable to the hard disk drive. b.
Page 110: Diskette Drive
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. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 111: Removing The Diskette Drive
Removing the Diskette Drive To remove the diskette drive: 1. Preparation. Follow the instructions for removing the disk drive mounting bracket in “Removing the Disk Drive Mounting Bracket” on page 91. 2. Remove the four Phillips-head screws holding the diskette drive to the disk drive mounting bracket (see Figure 9–16).
Page 112: Replacing The Diskette Drive
5. Replace the disk drive mounting bracket in the unit top. See “Replacing the Disk Drive Mounting Bracket” on page 94”. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 113: System Board Overview
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 114: Damage Prevention
Caution - Hot surface. Avoid contact. Surfaces are hot and may cause personal injury if touched. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 115 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: 4 Hold the system board only by the edges. 4 Do not place the system board on a hard surface.
Page 116: Main Logic Board Layouts
Main Logic Board Layouts The main logic board (MLB) resides in the bottom half of each system unit (see Figure 10–4). Figure 10–1 shows a simpliﬁed layout of the SPARCclassic and the SPARCclassic X terminal main logic board. Table 10–2 lists acronyms and abbreviations for certain components.
Page 117 Figure 10–2 Main Logic Board Layout—SPARCstation LX System (Part 270-2233) System Board Overview...
Page 118: Identifying Replaceable System Board Components
Main Logic Board Layout—SPARCstation LX System (Part 270-2474) Identifying Replaceable System Board Components Before you attempt to replace or install a new SPARCclassic/SPARCclassic X/ SPARCstation LX board or subassembly, make sure that you have the right unit. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 119 4 Speaker/power LED assembly 4 Main logic board 4 NVRAM 4 System I/O board Internal cables 4 Diskette drive data cable (Not applicable to SPARCclassic X terminal) 4 Hard disk drive data cable (Not applicable to SPARCclassic X terminal) System Board Overview...
Page 120 Note - As noted in the part labels shown in Figure 10–4, some items are not applicable to the SPARCclassic X terminal. Figure 10–4 View of Open System Unit SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 121: Main Logic Board And Component Replacement
CHAPTER 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. 4 “SBus Cards” on page 107 4 “Video SIMM (VSIMM)”...
Page 122 Caution - The plastic SBus card retainer is not a handle. Pulling on the SBus card retainer can cause it to break. 6. Place the SBus card on an antistatic mat. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 123 Figure 11–1 Removing the SBus Card 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 (Figure 11–2). Failure to do so can cause cooling problems inside the system unit.
Page 124: Replacing Sbus Cards
Pay particular attention to the section describing the jumper or switch settings, slot requirements, and tools needed. 3. Remove the replacement card from its antistatic bag. Hold the card by the edges. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 125 Place the SBus card on an antistatic surface (either an antistatic mat or the antistatic bag in which the card was shipped). 4. If required, set the jumpers or switches on the card. Refer to the manual supplied with the replacement SBus card. 5.
Page 126 11. Refer to Chapter 6 to turn the power on. 12. Refer to the guide for your SBus product to complete any required software installation, conﬁguration, or additional setup procedures. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 127: Video Simm (Vsimm)
This section describes the procedures for removing and replacing a faulty Video SIMM. The VSIMM is an option on SPARCstation LX systems only. Complete installation procedures can be found in Installing SPARCclassic/SPARCclassic X/ SPARCstation LX DSIMMs and VSIMMs. Removing the VSIMM...
Page 128 Grasp the VSIMM at its top corners and carefully wiggle it free from its connector (see Figure 11–6). Be careful not to touch any of the components on the VSIMM. 5. Place the VSIMM on the antistatic mat. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 129: Replacing The Vsimm
Figure 11–6 Removing the VSIMM Replacing the VSIMM 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 130 3. Refer to Chapter 7 to perform the following procedures: 4 Detaching the wrist strap 4 Closing the system unit 4 Reconnecting system components 4. Refer to Chapter 6 to turn the power on. Figure 11–7 Installing the VSIMM SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 131: Dram Single In-Line Memory Modules (Dsimms)
Typical DSIMM Figure 11–9 shows the DSIMM slot locations on the main logic board. Table 11–1 shows the conﬁguration matrix for the SPARCclassic X terminal using 1-,2-,4-, and 16-megabyte memory modules. Table 11–2 shows the conﬁguration matrix using 4- and 16-megabyte memory modules. The maximum memory conﬁguration is 96 megabytes using six 16-megabyte DSIMMs.
Page 132 4 MB 4 MB 4 MB 32 MB 16 MB — — 16 MB — — 36 MB 1 MB 1 MB 16 MB 1 MB 1 MB 16 MB SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 133 Memory Conﬁguration Matrix—SPARCclassic X Terminal TABLE 11–1 (continued) Total Slot Slot Slot Slot Slot Slot 36 MB 2 MB 16 MB — 2 MB 16 MB — 40 MB 2 MB 2 MB 16 MB 2 MB 2 MB 16 MB...
Page 134: Removing A Dsimm
AC wall outlet to provide a proper ground path. 2. Locate the DSIMM slots on the main logic board. See Figure 11–9. 3. Place an antistatic mat, shiny side up, next to the system unit. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 135 The mat is supplied with the replacement DSIMMs. 4. Locate and remove the faulty DSIMM. See “Determining Faulty DSIMM Locations” on page 37. The DSIMMs are held in their slots by metal clips. To release the modules, pry apart the clips with your ﬁngernails while pushing the top of the module gently forward about 30 degrees from the vertical position (see Figure 11–6).
Page 136: Replacing A Dsimm
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. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 137 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 138: Main Logic Board
See “Closing the System Unit” on page 55 for instructions. Main Logic Board This section explains how to remove and replace the main logic board (MLB). SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 139: Main Logic Board Voltage Test Points
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 Figure 11–12 and Figure 11–13). See “Before Replacing the Main Logic Board” on page 128 for the connector wiring and voltages.
Page 140 Figure 11–12 Main Logic Board Layout—SPARCclassic/SPARCclassic X SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 141 Figure 11–13 Main Logic Board Layout—SPARCstation LX (Part 270-2233) Main Logic Board and Component Replacement...
Page 142: Before Replacing The Main Logic Board
Figure 11–14 Main Logic Board Layout—SPARCstation LX (Part 270-2474) Before Replacing the Main Logic Board This section explains what steps to perform before removing and replacing the main logic board. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 143 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 144 Interrupt the boot sequence by pressing the Break key on the terminal keyboard. c. If you see the ok prompt, go to step 3-e. If you see the > prompt, continue with step 3-d. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 145 6. At the > or ok prompt, turn off the system’s power switch. 7. Disconnect the terminal and reconnect the graphics monitor, keyboard, and Ethernet connector. See the Desktop SPARC Hardware Owner’s Guide or Using a SPARCclassic X Terminal for installation instructions. Main Logic Board and Component Replacement...
Page 146: Removing The Main Logic Board
Note carefully the slot where each DSIMM resides so it may be installed in the same slot on the replacement main logic board. See “Removing a DSIMM” on page 120, for removal procedures. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 147 5. Remove the optional VSIMM (if present). See “Removing the VSIMM” on page 113, for removal procedures. 6. Disconnect all cables attached to the main logic board. For connector locations, refer to Figure 11–12 and Figure 11–13 in “Main Logic Board”...
Page 148 Figure 11–15 Extracting the Main Logic Board Figure 11–16 Raising the Speaker/LED Assembly SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 149 Figure 11–17 Removing and Replacing the Main Logic Board Main Logic Board and Component Replacement...
Page 150: Installing The New Main Logic Board
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 11–18). e. Lower the speaker assembly back to its original position. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 151 Figure 11–18 Plugging in the Main Logic Board 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 and Figure 11–13. a. Connect the 12-pin connector from the power supply harness to its mating connector on the main logic board.
Page 152: Nonvolatile Ram (Nvram)
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. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 153 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 154: Replacing The Nvram
The SPARCstation LX is conﬁgured for ISDN support. Shown in Figure 11–21 are the default jumper settings for the main logic board addresses J1801 and J1802, respectively. Table 11–3 fully describes these jumper settings. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 155 Figure 11–21 Default 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, see the Sun ISDN-BRI/SBI Hardware Conﬁguration Guide. SPARCstation LX ISDN Jumper Settings TABLE 11–3 Address Jumper Pins...
Page 156 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 157: Illustrated Parts Breakdown
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. 4 “Illustrations of Selected CRUs” on page 143 4 “Replacement Part List”...
Page 158 Figure 12–1 Exploded View of the Unit Top SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 159 Figure 12–2 Exploded View of the Unit Bottom Illustrated Parts Breakdown...
Page 160: Replacement Part List
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. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 161 501-2474 11 Main Logic Board (4 Mbyte)—SPARCclassic X 501-2079 12 Main Logic Board (8 Mbyte)—SPARCclassic X 501-2313 13 Upgrade (SPARCclassic X 4-Mbyte to Classic 16-Mbyte) 556-1774 14 Upgrade (SPARCclassic X 8-Mbyte to Classic 16-Mbyte) 556-1775 15 1-Mbyte DSIMM Module 501-2289...
Page 162 41 Holland/Dutch Type-5 Keyboard 320-1078 42 Norwegian Type-5 Keyboard 320-1079 43 Portuguese Type-5 Keyboard 320-1080 44 Spanish Type-5 Keyboard 320-1081 45 Swedish/French Type-5 Keyboard 320-1082 46 Swiss/French Type-5 Keyboard 320-1083 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 163 Part Number List—Customer Replaceable Units TABLE 12–1 (continued) Item Description Sun Part No. 47 Swiss/German Type-5 Keyboard 320-1084 48 U.K. Type-5 Keyboard 320-1085 49 Korean Type-5 Keyboard 320-1086 50 Taiwan Type-5 Keyboard 320-1087 51 Nihon-Go Type-5 Keyboard 320-1088 52 Finnish Type-5 Keyboard 320-1089 53 19"...
Page 164 Open Boot Command Reference 800-5675 Open Boot Command Summary SPARCstation LX Hardware Setup Instructions 801-2177 801-2210 SPARCclassic Hardware Setup Instructions 801-4250 SPARCclassic X Terminal Hardware Setup Instructions 801-4721 SPARCclassic X Upgrade Guide SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 165 Part Number List—Related Hardware Documentation TABLE 12–3 (continued) Item Description Sun Part No. 801-2211 Installing SPARCclassic/SPARCclassic X/SPARCstation LX SIMMs 800-6863 Sun ISDN-BRI/SBIH Hardware Conﬁguration Guide Illustrated Parts Breakdown...
Page 166 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 167: System Specifications
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 168: Environmental Requirements
5 g pk, 10 msec 1/2 sine wave Non-Operating Environment: Temperature 20 to 75 ˚ C (-4 to 167 ˚ F) Wet Bulb 46 ˚ C (115 ˚ F) maximum SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 169: Physical Specifications
Environmental Requirements TABLE A–2 (continued) Operating Environment: Vibration 5-22 Hz, 0.02 inches p-p; 22-500 Hz, 0.5 g p-p Shock 5 g pk, 10 msec 1/2 sine wave Physical Speciﬁcations Table A–3 lists the physical speciﬁcations for the system unit, keyboard, and optical mouse.
Page 170 FCC Class B German Federal DHHS, PTB CSA C22.2 No. 950 VDE Class B Republic ZH 1/618 IEC 950 NEMKO CB DOC Class B ISO 9241 EN60950-TÜV VCCI Class 2 EN41003-TÜV SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 171: System Connectors
APPENDIX System Connectors This appendix contains pinouts and illustrations of the various system connectors. The following connectors are described. 4 “Attachment Unit Interface (AUI) Connector” on page 158 4 “Twisted-Pair Ethernet Connector” on page 159 4 “ISDN Terminal Endpoint Connector” on page 159 4 “ISDN Network Termination Connector”...
Page 172: Attachment Unit Interface (Aui) Connector
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 ♦ Revision A, November 1993...
Page 173: Twisted-Pair Ethernet Connector
Twisted-Pair Ethernet Connector Figure B–2 Twisted-Pair Ethernet Connector Pinout for Twisted-Pair Ethernet Connector TABLE B–2 Description Description Transmit Data + Transmit Data - Receive Data - Receive Data + ISDN Terminal Endpoint Connector Figure B–3 ISDN Terminal Endpoint Connector System Connectors...
Page 174: Isdn Network Termination Connector
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 ♦ Revision A, November 1993...
Page 175: Keyboard/Mouse Connector
Keyboard/Mouse Connector Figure B–5 Keyboard/Mouse Connector 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. SCSI Connector (External) Figure B–6 External SCSI Connector...
Page 176 Ground sd5* Ground sd6* Ground sd7* Ground sdp* Ground Ground Ground Ground TermPWR Ground Ground Ground atn* Ground Ground Ground bsy* Ground ack* Ground rst* Ground msg* Ground sel* Ground SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 177: Serial Connector
Pinout for External SCSI Connector TABLE B–6 (continued) Description Description Ground req* Ground Note - Pin 38 is +5V, fused and supplied by a schottkey diode. Serial Connector Figure B–7 Serial Connector Pinout for Serial Connector TABLE B–7 Description Description 1 N /C B Transmit Data 2 A Transmit Data...
Page 178: 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 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 179: 13W3 Video Connector
Pinout for Parallel Connector TABLE B–8 (continued) Description Description Ground Busy Ground Ground Slct 13W3 Video Connector Figure B–9 13W3 Video Connector 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)
Page 180: Audio Ports And Audio Module
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). “Signals for the Audio Ports” on page 166 gives the signals for the audio ports.
Page 181: Audio Line-In Connector
Audio Line-In Connector Figure B–12 Audio Line-in Connector This connector is used to connect external sound sources such as a compact disc player or cassette tape player to the system. SCSI Connector (Internal) Figure B–13 Internal SCSI Connector Pinout for Internal SCSI Connector TABLE B–11 Description Description...
Page 182: Diskette Drive Connector (Internal)
Ground ack* sd6* Ground Ground rst* sd7* Ground Ground msg* sdp* Ground Ground sel* Ground Ground Ground Ground Ground reg* Ground Diskette Drive Connector (Internal) Figure B–14 Diskette Drive Connector SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 183 Pinout for Diskette Drive Connector TABLE B–12 Description Description eject direction Ground Ground step Ground Ground write data Ground Ground write gate Index Ground Ground track 0 drive select 0 Ground Ground write protect Ground Ground read data Ground Ground hd select motor Ground...
Page 184: Sbus Connector (Internal)
62 sb_d(15) 86 sb_pa(15) 15 sb_d(16) 39 sb_pa(16) 63 sb_d(17) 87 sb_pa(17) 16 sb_irq4* 40 sb_ack8* 64 +5 VDC 88 +5 VDC 17 sb_d(19) 41 sb_pa(18) 65 sb_d(18) 89 sb_pa(19) SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 185: Power Connector (Internal)
Pinout for SBus Connector TABLE B–13 (continued) Description Description Description Description 18 sb_d(21) 42 sb_pa(20) 66 sb_d(20) 90 sb_pa(21) 19 sb_d(23) 43 sb_pa(22) 67 sb_d(22) 91 sb_pa(23) 20 sb_irq5* 44 sb_ack32* 68 Ground 92 Ground 21 sb_d(25) 45 sb_pa(24) 69 sb_d(24) 93 sb_pa(25) 22 sb_d(27) 46 sb_pa(26)
Page 186 Pinout for Power Connector TABLE B–14 (continued) Description Description +12 Vdc +12 Vdc -12 Vdc SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 187: On-Board Diagnostics
APPENDIX On-Board Diagnostics This appendix explains On-Board Diagnostic tests. The following topics and tests are described. 4 “Running the On-Board Diagnostics” on page 173 4 “Test <alias name>, Test <device path>” on page 175 4 “Test-all” on page 176 4 “Watch-clock” on page 176 4 “Watch-net, Watch-aui, Watch-tpe and Watch-net-all”...
Page 188 1. Enter n at the > prompt to get to the ok prompt. 2. Enter reset at the ok prompt. 3. When you see the system banner, press Stop-a to access the Forth Toolkit. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 189 5. Enter the name of the test you wish to execute. 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...
Page 190 Type any key to stop......................SPARCclassic and SPARCstation LX systems have two types of on-board Ethernet interfaces, 10BaseT (also called twisted-pair Ethernet or TPE) and 10Base5 (also called thick Ethernet or AUI). Only one on-board interface may be connected at a time.
Page 191 The AUI port is ﬁrst tested by transmitting packets and checking for No Carrier or response packets. If the AUI test fails, the TPE port is then tested. Entering watch-net causes this automatic selection to take place. You may see these messages: ok watch-net Internal loopback test -- succeeded.
Page 192 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 193 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. When the test-memory diagnostic is running, the number of megabytes being tested is displayed and counted down to zero during the test.
Page 194 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993...
Page 195 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. See printed circuit board. board To load the system software into memory and start it running.
Page 196 DRAM Single In-line Memory Module. A small printed circuit card that contains dynamic random access memory (DRAM) chips. External Storage Module. An external unit that contains disk and/or tape drive(s) that can be connected to a Desktop SPARCstation. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993 Glossary-182...
Page 197 Forth A high-level programming language. A major feature of Forth is that user-deﬁned operators can be used as if they are primitives. Forth Toolkit An interactive command interpreter based on the Forth programming language. While in the Toolkit, you will see the ok prompt.
Page 198 A device that provides grounding for static electricity between your body and the system unit’s chassis. Electric current and voltage do not pass through the wrist strap. SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993 Glossary-184...
Page 199 Index Index-185...

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