Sun Microsystems SPARCstation 2 Service Manual
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Sun Microsystems SPARCstation 2 Service Manual

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SPARCstation2FieldServiceManual
Sun Microsystems, Inc.
2500 Garcia Avenue
Mountain View, CA 94043
U.S.A.
Part No: 800-5166-10
Revision A of February 1991

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  • Page 1 SPARCstation2FieldServiceManual Sun Microsystems, Inc. 2500 Garcia Avenue Mountain View, CA 94043 U.S.A. Part No: 800-5166-10 Revision A of February 1991...
  • Page 2 The product described in this manual may be protected by one or more U.S. patents, foreign patents, and/or pending applications. TRADEMARKS The Sun logo, Sun Microsystems, Sun Workstation, NeWS, and SunLink are registered trademarks of Sun Microsystems, Inc. in the United States and other countries. Sun, Sun-2, Sun-3, Sun-4, Sun386 , SunCD, SunInstall, SunOS, SunView, NFS, and OpenWindows are trademarks of Sun Microsystems, Inc.

  • Page 3: Table Of Contents

    Contents About This Book ......... . . xiii 1.
  • Page 4 SBus Boards ......... SPARCstation 2 Field Service Manual—February 1991...
  • Page 5 Power Supply ........Hard Disk Drive .
  • Page 6 Index ............125 SPARCstation 2 Field Service Manual—February 1991...
  • Page 7 Figures Figure 1-1 SPARCstation 2 Block Diagram......Figure 1-2 Top View of the System With the Cover Removed ..
  • Page 8 Figure B-1 System Interconnection ........viii SPARCstation 2 Field Service Manual—February 1991...
  • Page 9 Figure B-2 Exploded View of the System Unit......Figure B-3 Exploded View of the System Unit Showing Drive Bracket..Figure B-4 Exploded View of the Main Logic Board in the System Unit.
  • Page 10 SPARCstation 2 Field Service Manual—February 1991...
  • Page 11 Tables Table 1-1 Main Logic Board Parts Layout: Legend ....Table 1-2 List of Acronyms ........Table 1-3 Video Monitor Types .
  • Page 12 SPARCstation 2 Field Service Manual—February 1991...

  • Page 13: Aboutthisbook

    This book contains four chapters, four appendices and a glossary: • System Overview—Chapter 1 This chapter presents a high-level description of the SPARCstation 2 system, followed by brief descriptions of each subsystem. Read this chapter to gain a general familiarity with the hardware.
  • Page 14 Illustrated Parts Breakdown—Appendix B This appendix contains illustrations of global views of the system. • FRU list—Appendix C This appendix contains the FRU list for SPARCstation 2. • OpenBoot PROM—Appendix D This appendix contains the Alias and Boot Paths table and the Non-Volatile Random Access Memory (NVRAM) parameters used during reset.
  • Page 15 This book uses a number of typographic conventions: • This font is used for emphasis and for the title of a book. For example: The heart of the SPARCstation 2 is contained in a main chassis, or system unit. SPARCstation 2 Installation Guide •...
  • Page 16 SPARCstation 2. • Sun System User’s Guide covers the basics of using the SPARCstation 2 so that you can get to work quickly. It will introduce you to the mouse and ™...

  • Page 17: Systemoverview

    This chapter presents an overview of the SPARCstation 2 system’s hardware. This overview is helpful in servicing and maintaining hardware equipment. The heart of the SPARCstation 2 is contained in a main chassis or system unit. The system unit houses the main logic board. A power supply, two optional 3 1/2-inch hard disk drives, one optional 3 1/2-inch diskette drive, and the speaker are also contained in the system unit.

  • Page 18: Figure 1-1 Sparcstation 2 Block Diagram

    Figure 1-1 is a block diagram of one of the workstation’s configurations. Monitor Mouse Keyboard Power Tape Main logic board supply Hard disk Internal Internal diskette hard drive External storage drive device System unit Figure 1-1 SPARCstation 2 Block Diagram SPARCstation 2 Field Service Manual—February 1991...

  • Page 19: Figure 1-2 Top View Of The System With The Cover Removed

    Figure 1-2 shows the top view of the system with the cover removed. Boot Lithium Serial port PROM battery jumpers Back panel SPARC floating point unit (FPU) SPARC integer unit (IU) Power supply SBus slots SIMM SIMM slots slots Cache controller Hard Hard...

  • Page 20: Figure 1-3 The Workstation's Main Logic Board

    SBus Slot 3 SBus Slot 2 SBus Slot 1 J0704 J0701 SIMM SIMM Slots Slots J0703 J0402 HD1 SCSI J0702 J0401 HD2 SCSI J0602 J0501 Front Panel Figure 1-3 The Workstation’s Main Logic Board SPARCstation 2 Field Service Manual—February 1991...

  • Page 21: Table 1-1 Main Logic Board Parts Layout: Legend

    Table 1-1 Main Logic Board Parts Layout: Legend Figure 1-3 Definition SPARC Floating Point Unit SPARC Integer Unit Cache Controller Cache Data RAM (chip set) Cache Data RAM (chip set) Boot PROM NVRAM, Time-of-Day Clock, Lithium Battery RS-232 and RS-423 serial port mode jumpers DMA CTRL DMA Controller, S4 DMA+ E-NET...

  • Page 22: Table 1-2 List Of Acronyms

    Table 1-2 List of Acronyms Acronyms Full Expression Direct Memory Access MMU+ Memory Management Unit+ NVRAM Non-Volatile Random Access Memory PROM Programmable Read-Only Memory Random Access Memory SCSI Small Computer System Interface SIMM Single Inline Memory Module SPARCstation 2 Field Service Manual—February 1991...

  • Page 23: Figure 1-4 Block Level Diagram Of The Main Logic Board

    SPARC SPARC S4 MMU+ 64Kx8 Ethernet SCSI Cache+ S4 DMA+ Cache Cache data data SBus address SBus data Buffer Serial communication controllers S4 RAM SBus slots Boot PROM 16 SIMMs video NVRAM/TOD Diskette drive controller VRAM Audio SBus frame buffer board Figure 1-4 Block Level Diagram of the Main Logic Board System Overview...

  • Page 24: Major Components

    Desktop Storage Pack Installation Guide. Main Logic Board The major sections of the main logic board consist of the following: • CPU core • SBus slots • Memory Management Unit+ (MMU+) • S4 Direct Memory Access+ (DMA+) SPARCstation 2 Field Service Manual—February 1991...

  • Page 25: Cpu Core

    • Dynamic Random Access Memory (RAM) • Input/Output such as the Ethernet controller chip, the SCSI controller chip, and the diskette drive controller chip • Eight-bit devices CPU Core The CPU core consists of the following: • Integer Unit (IU) •...

  • Page 26: Sbus Slots

    The cache data RAM is filled with the information obtained from main memory and the IU is started again. The cache design implemented in the SPARCstation 2 is a 64 K write-through cache with one level of write buffering. The cache line size is 16 bytes, with one tag for each line.

  • Page 27: S4 Dma

    16 Single Inline Memory Module (SIMM) slots for 4 MB SIMMs in groups of 4. See “Single Inline Memory Modules (SIMMS)” in Chapter 4 and Installing SPARCstation 2 SIMMs for information on how to install SIMMS. Input/Output The following chips, which control input/output devices, are briefly discussed in this section: •...

  • Page 28: Eight Bit Devices

    The non-volatile RAM stores the default system configuration parameters. The default parameters are listed in Appendix D. This defines how the system will be set up at the lowest level. You can modify these parameters SPARCstation 2 Field Service Manual—February 1991...
  • Page 29 These serial ports are RS-423 or RS-232 ports and can connect peripheral equipment such as terminals, printers, and modems. The serial ports on the SPARCstation 2 are set to operate in synchronous or asynchronous RS-423 mode. The serial ports can be reconfigured by changing jumpers on the main logic board to run at RS-232 for users in the Federal Republic of Germany.

  • Page 30: Single Inline Memory Modules (Simms)

    Boards” in Chapter 4 for information on how to remove and replace SBus boards. The following is a list of some of SBus boards available for a SPARCstation 2. Note that this is not an inclusive list of all SBus boards available for the SPARCstation 2.

  • Page 31: Mass Storage Devices

    Mass Storage Devices The following is some of the mass storage devices available. Note that the following list is not necessarily an inclusive list of mass storage devices available for SPARCstation 2. • Hard disk drives Two optional 3 1/2-inch SCSI 207 MB hard disk drives (see Figure 1-2) can be installed in the system unit.

  • Page 32: Power Supply

    The External drive units have their own power supplies. The External Storage Module’s power supply provides +5, +12, and -12 volts DC. The Desktop Storage Pack’s power supply provides +5 and +12 volts DC. SPARCstation 2 Field Service Manual—February 1991...

  • Page 33: Monitors

    Monitors Each system accepts a keyboard, an optical mouse, and one of several types of video monitors. See Appendix C for the available monitors. See Table 1-3 for the supported monitors. Table 1-3 Video Monitor Types Monitor Type Voltage 16-inch color monitor (407 mm) 115 V 16-inch color monitor (407 mm) 240 V...
  • Page 34 SPARCstation 2 Field Service Manual—February 1991...

  • Page 35: Diagnosticsoverview

    DiagnosticsOverview This chapter describes the different types of diagnostic firmware and software tools available to you and how they are related. The main categories of diagnostics are: • Boot PROM diagnostics Power-On Self-Test (POST) ° On-Board Diagnostics ° • Sundiag System Exerciser •...

  • Page 36: Figure 2-1 Default Boot Mode

    > prompt or boot Yes (default) command at ok prompt Diag switch? No (default) Boot from Boot from Boot user- device path device path specified /sbus/esp /sbus/le program /sd@3,0 Figure 2-1 Default Boot Mode SPARCstation 2 Field Service Manual—February 1991...

  • Page 37: How It Fits Together

    How It Fits Together This section describes how the various diagnostic tools work together in the different power-on modes. This description assumes you are using a graphics monitor to view test results. The flowchart in Figure 2-1 outlines the roles played by various diagnostics during the default boot mode.

  • Page 38: When To Use Diagnostics

    When to Use Diagnostics You should use each type of diagnostic tool in the appropriate circumstances. Table 2-1 provides a summary of the available diagnostic tools, and lists when to use each diagnostic tool. SPARCstation 2 Field Service Manual—February 1991...

  • Page 39: Table 2-1 Summary Of Available Diagnostic Tool

    Table 2-1 Summary of Available Diagnostic Tool Diagnostic Tool When or why to use Power-On Self-Test Executes automatically at power-on. The POST code resides in the boot PROM and is driven by the Por signal from the power supply. POST tells you if the major hardware components of the main logic board, the frame buffer, and the hard disk fails.

  • Page 40: Boot Prom Diagnostics

    NVRAM configuration options specify not to do so. Power-On Self-Test Detailed Description This section describes the keyboard LED patterns as a result of POST and their meaning. Figure 2-2 shows the arrangement of keyboard LEDs. SPARCstation 2 Field Service Manual—February 1991...

  • Page 41: Figure 2-2 Arrangement Of Keyboard Leds

    Caps Scroll Lock Compose Lock Lock Figure 2-2 Arrangement of Keyboard LEDs Figure 2-3 shows the LED display patterns, the field replaceable units (FRUs) that fail power-on tests, and the meaning of the display patterns. Figure 2-4 shows the location of the SIMM slots in the system unit. Figure 2-5 shows how the SIMM slots are identified on the main logic board.

  • Page 42: Figure 2-3 Keyboard Led Diagnostic Codes

    SIMM U0309 failed, bank 0. U0309 SIMM SIMM U0307 failed, bank 0. U0307 SIMM SIMM U0322 failed, bank 0. U0322 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Figure 2-3 Keyboard LED Diagnostic Codes SPARCstation 2 Field Service Manual—February 1991...

  • Page 43: Figure 2-4 Location Of Simm Slots In System Unit

    Boot Lithium Serial port PROM battery jumpers Back panel SPARC floating point unit (FPU) SPARC integer unit (IU) Power supply SBus slots SIMM SIMM slots slots Cache controller Hard Hard drive drive Diskette drive Front panel System assembly speaker Figure 2-4 Location of SIMM Slots in System Unit Diagnostics Overview...

  • Page 44: Figure 2-5 Simm Slot Locations On Main Logic Board

    (U0314) U0315 U0319 U0316 (U0318) U0317 Note – Slots U0310, U0314, and U0318 are not identified on the board with any visible markings. These slots are shown in Figure 2-5 andTable 2-2 in parentheses. SPARCstation 2 Field Service Manual—February 1991...

  • Page 45: On-Board Diagnostics

    For further information about replacing the FRUs that fail, see “Removing and Replacing FRUs” in Chapter 4. If all POST tests pass, run the SunDiagnostic Executive with the cache disabled. The SunDiagnostic Executive is an independent operating system. It runs exhaustive subsystem tests independent of SunOS. See the latest version of SunDiagnostic Executive User’s Guide for the SPARCstations.

  • Page 46: Sundiag System Exerciser

    External Storage Modules. The Sundiag System Exerciser is run to verify that the system is functioning properly. The exerciser is shipped with SunOS and preinstalled on SPARCstation 2. If it has been selected during the SunInstall (operating system loading) procedure, it can be run at any time and is found in the directory /usr/diag/sundiag.

  • Page 47: Sundiagnostic Executive

    you can load it from tape or CD. For information on how to use the Sundiag System Exerciser, see the Sundiag User’s Guide. Appendix A, “Loopback Connectors” in the Sundiag User’s Guide explains how to connect the external loopback connectors required for some options. If Sundiag passes, the system is operating properly.
  • Page 48 For extensive information on tests you can run from the Forth Toolkit see Chapter 5 of the Open Boot PROM 2.0 Toolkit User’s Guide. To return to the Monitor > prompt, from the Forth Toolkit: ok old-mode > SPARCstation 2 Field Service Manual—February 1991...

  • Page 49: Preparingtoworkonthesystem

    PreparingtoWorkontheSystem This chapter explains steps you must perform before replacing field- replaceable-units (FRUs). Topics covered in this chapter include the following: • How to halt the system • Tools needed • How to disconnect the Desktop Storage Pack • How to disconnect the External Storage Module •...
  • Page 50 Do not disconnect the power cord from the system unit’s power outlet or the wall socket. This connection provides the ground path necessary to safely remove and install the printed circuit boards and components. SPARCstation 2 Field Service Manual—February 1991...
  • Page 51 To halt a system that is hung, or frozen, and unresponsive to commands: Margin note On some keyboards, L1 appears 1. Press L1-A. on the front face of the Stop key. On a system that has a terminal The system displays the system boot prompt. as a console, rather than a Sun keyboard and bitmapped monitor, 2.

  • Page 52: Tools Needed

    To disconnect the External Storage Module (ESM) from the system unit: 1. Press in on the finger clips on the connector connecting the ESM to the system unit and pull the connector off. This action disconnects the SCSI cable from the system unit. SPARCstation 2 Field Service Manual—February 1991...

  • Page 53: Removing The System Unit's Cover

    Warning – Before powering up your system again, be sure to replace the top cover. See “Replacing the System Unit’s Cover” towards the end of Chapter 4. It is not safe to operate the SPARCstation 2 without its top cover in place Preparing to Work on the System...

  • Page 54: Figure 3-1 System Unit Back Panel

    1 and 2. Do not remove screws 3, 4, and 5. Figure 3-1 System Unit Back Panel Security loop Plastic tabs Remove these two screws from back panel Figure 3-2 The System Unit’s Cover SPARCstation 2 Field Service Manual—February 1991...

  • Page 55: Attaching A Wrist Strap

    Attaching a Wrist Strap The wrist strap is a device that provides grounding between your body and the system unit’s chassis for static electricity. Electric current and voltage do not pass through the wrist strap. Attach the wrist strap to your wrist and to the system chassis.
  • Page 56 SPARCstation 2 Field Service Manual—February 1991...

  • Page 57: Frureplacement

    FRUReplacement This chapter explains how to remove defective FRUs and replace new ones. See “FRU list” in Appendix C for the part numbers and description of FRUs. The following units are field-replaceable: • Single Inline Memory Modules (SIMMs) • SBus boards •...

  • Page 58: Before You Begin

    Ordinary amounts of static from your clothes or work environment can destroy the boards. Handle boards only by the non-conducting edges. Do not touch the components themselves or any metal parts. Wear a grounding strap when handling the boards. SPARCstation 2 Field Service Manual—February 1991...

  • Page 59: Figure 4-1 Top View Of The System With The Cover Removed

    Do not disconnect the power cord from the system unit’s power outlet or from the wall socket. This connection provides the ground path necessary to safely remove and install the printed circuit boards and components. Make sure that the system unit’s power is turned off by checking to make sure that the green light-emitting diode (LED) at the front of the chassis is not lit and the fans are not running.

  • Page 60: Figure 4-2 Boards And Modules (Continued On Next Page)

    SBus Printer Card GS Graphics Accelerator Board Color Frame Buffer Board GX Graphics Accelerator Board Figure 4-2 Boards and Modules (continued on next page) SPARCstation 2 Field Service Manual—February 1991...

  • Page 61: Figure 4-2 Boards And Modules (Continued)

    Ethernet board Single Inline Memory Module Main logic board Figure 4-2 Boards and Modules (continued) FRU Replacement...

  • Page 62: Single Inline Memory Modules (Simms)

    Single Inline Memory Modules (SIMMs) SPARCstation 2 system units are equipped with a minimum of 16 megabytes of random access memory (RAM). Physically, RAM chips are grouped together in single inline memory modules (SIMMs). Each SIMM contains 4 megabytes of memory and plugs into a SIMM slot located on the main logic board of the system unit.
  • Page 63 Bank Physical Address Range Byte (Bits) SIMM 000000-ffffff 31-24 U0311 23-16 U0309 15-8 U0307 U0322 1000000-1 ffffff 31-24 U0312 23-16 (U0310) 15-8 U0308 U0321 31-24 U0313 2000000-2ffffff 23-16 (U0314) 15-8 U0315 U0320 31-24 U0319 3000000-3ffffff 23-16 (U318) 15-8 U0317 U0316 Bits Bits Bits...
  • Page 64 6. Insert the hooked end of the extraction tool (see Figure 4-3) into the left or right SIMM extraction hole. Use the hole that allows rotation of the tool to the left or right without encountering obstructions (see Figure 4-4) SPARCstation 2 Field Service Manual—February 1991...

  • Page 65: Figure 4-3 Simm Extraction Tool

    Figure 4-3 SIMM Extraction Tool SIMM slot (top view) Rotate tool in Rotate tool in this direction only this direction only Figure 4-4 Inserting the SIMM Extraction Tool 7. Rotate the tool in a sideways motion, prying the side of the SIMM upward.
  • Page 66 Do not remove the SIMMs from the anti-static container until told to do so. Handle the modules only by the edges. Do not touch components themselves or any metal parts. Always wear a grounding strap when handling the modules. SPARCstation 2 Field Service Manual—February 1991...

  • Page 67: Figure 4-6 Location Of Simm Slots In System Unit

    1. Read the parts of Chapter 3 about how to halt your system, tools needed, removing expansion units, attaching a wrist strap, and removing the system unit’s cover. 2. Check that the green LED at the front of the chassis is not lit. 3.

  • Page 68: Figure 4-7 Simm Slot Location On Main Logic Board

    U0320 (U0314) U0315 U0319 U0316 (U0318) U0317 Note: Slots U0310, U0314, and U0318 are not identified on the board with any visible markings. These slots are shown in Figure 4-7 andTable 4-1 in parentheses. SPARCstation 2 Field Service Manual—February 1991...

  • Page 69: Figure 4-8 4 Megabyte Simm: Horizontally-Mounted Chips

    6. Place an anti-static mat shiny side up, next to the system unit. The mat comes with your SIMMs. 7. Make sure the wrist strap is securely attached to your wrist and the metal casing of the power supply. 8. See Chapter 3 for instructions on how to attach a wrist strap. 9.

  • Page 70: Sbus Boards

    SBus slots on the main logic board. • Color Frame Buffer Board This board occupies one SBus slot. This board controls the video output from the system unit to a color monitor. SPARCstation 2 Field Service Manual—February 1991...
  • Page 71 Second Ethernet Board This board provides you with an extra Ethernet port. The Ethernet board is used in applications in which your SPARCstation 2 acts as a gateway between two physically distinct Ethernet networks. This board has two connectors: standard (thick) Ethernet and thin Ethernet, and occupies one SBus slot.
  • Page 72 Make sure that the mounting plate on the SBus board hooks upward into the Margin noteThe mounting slots are above the rectangular opening holes at the back panel of the system unit. for the connector in the back panel. SPARCstation 2 Field Service Manual—February 1991...
  • Page 73 Caution – When replacing the SBus board, do not press down on the SBus board retainer. The SBus board retainer is not a handle. Pressing down on it may break the retainer. Press on corners of board. Do not press on plastic SBus board retainer SBus board retainer Holes that receive...

  • Page 74: Power Supply

    6. Disconnect the cable from the white 12-pin connector (J0701) on the main logic board. 7. Grasp the power supply. Slide it forward toward the front of the chassis and lift it out of the chassis. SPARCstation 2 Field Service Manual—February 1991...
  • Page 75 To replace a new power supply follow these steps: 1. Align the new power supply correctly as shown in Figure 4-9 with the tabs and guides in the bottom of the chassis. 2. Position the power supply by pushing it firmly toward the rear of the chassis until it locks into the tabs.

  • Page 76: Hard Disk Drive

    A 50-pin SCSI data cable and a 4-pin power cable connect to the rear of each drive. Each drive and its plastic mounting bracket are secured to the chassis by four mounting tabs and two locking tabs that fit into slots in the bottom of the chassis. SPARCstation 2 Field Service Manual—February 1991...
  • Page 77 Caution – The hard disk drive contains electronic components that are extremely sensitive to static electricity. Ordinary amounts of static from your clothes or work environment can destroy the components Do not touch the components themselves or any metal parts. Wear a grounding strap when handling the drive.

  • Page 78: Table 4-2 Table Of Hard Disk Id Jumper Settings

    You now have access to the drive controller board. Go to the next step if you are replacing drive 1. Go to step 4 if you are replacing drive 2. SPARCstation 2 Field Service Manual—February 1991...
  • Page 79 3. Inspect the jumper settings. Compare them to the settings shown in Figure 4-10 or 4-12. If the settings are the same as in the figure that matches your drive, leave ° them as they are. If the settings are not the same, change them to match the settings in the °...

  • Page 80: Figure 4-10 Hard Disk Drive With 6 Jumpers-Jumper Setting For Drive

    Hard Disk Drive with 6 Jumpers—Jumper Setting for Drive Figure 4-10 SCSI device address EP (enable parity) WP (disable wait spin) (jumpers not labeled on drive) Figure 4-11 Hard Disk Drive with 5 Jumpers—Jumper Setting for Drive 1 SPARCstation 2 Field Service Manual—February 1991...

  • Page 81: Figure 4-13 Hard Disk Drive With 5 Jumpers-Jumper Setting For Drive

    SS (self test) EP (enable parity) WP (enable wait spin) Empty slot SCSI device address Figure 4-12 Hard Disk Drive with 6 Jumpers—Jumper Setting for Drive 2 SCSI device address EP (enable parity) WP (disable wait spin) (jumpers not labeled on drive) Hard Disk Drive with 5 Jumpers—Jumper Setting for Drive 2 Figure 4-13 FRU Replacement...
  • Page 82 7. Turn the system unit’s power on, and check for proper operation of the system unit and the replaced hard disk drives. See “How to Turn the Power Back On” towards the end of this chapter. SPARCstation 2 Field Service Manual—February 1991...

  • Page 83: Figure 4-14 Removing And Replacing The Hard Disk Drive

    Hard disk 2 Mounting bracket handle Mounting tab slots Hard disk 1 SCSI data cable and power connections on main logic board Removing and Replacing the Hard Disk Drive. Figure 4-14 FRU Replacement...

  • Page 84: Diskette Drive

    The drive and its mounting bracket are secured to the chassis by four mounting tabs and two locking tabs that fit into slots in the bottom of the chassis. SPARCstation 2 Field Service Manual—February 1991...
  • Page 85 Caution – The diskette drive contains electronic components that are extremely sensitive to static electricity. Ordinary amounts of static from your clothes or work environment can destroy the components. Do not touch the components themselves or any metal parts. Wear a grounding strap when handling the drive.

  • Page 86: Figure 4-16 Removing And Replacing The Diskette Drive

    3. Remove the replacement drive from its protective packaging. 4. Install the mounting bracket on the replacement drive. Fasten the bracket to the bottom of the hard drive by inserting and tightening the four screws through the bracket. SPARCstation 2 Field Service Manual—February 1991...
  • Page 87 5. Connect the data and "Y" power cables to the replacement drive (see Figure 4-17). The power and data connector are keyed so they will fit only one way. To replace the diskette drive: 1. Align the four mounting tabs on the bottom of the drive mounting bracket with the slots in the bottom of the chassis (see Figure 4-16).

  • Page 88: Fan Assembly

    Figure 4-17 Fan Assembly Each SPARCstation 2 contains two fan assemblies. One of them is built into the power supply. Although the power supply is a field replaceable-unit, the fan assembly resides in the power supply itself is not a field replaceable-unit.
  • Page 89 To remove the fan assembly: 1. Read the parts of Chapter 3 about how to halt your system, tools needed, removing expansion units, attaching a wrist strap, and removing the system unit’s cover. 2. Check that the green LED at the front of the chassis is not lit. 3.

  • Page 90: Figure 4-18 Removing And Replacing The Fan Assembly

    3. Place the fingerguard on top of the fan assembly. 4. Install both screws through the fingerguard, fan assembly and the chassis (Figure 4-18). 5. Replace the system units’s top cover. See “Replacing the System Unit’s Cover” near the end of this chapter. SPARCstation 2 Field Service Manual—February 1991...

  • Page 91: Main Logic Board

    6. Turn the system unit’s power back on, and check for proper operation of the system unit and the newly installed fan assembly. See “How to Turn the Power Back On” towards the end of this chapter. Connector P1 of the "Y" power cable (yellow, black, black, red) connects to J0704 (main logic board).

  • Page 92: Serial Port Jumpers

    4-21). The jumpers are preset from the factory in RS-423 mode. The ports can be set either as RS-232 mode (for users in the Federal Republic of Germany) or as RS-423 mode for the rest of the users. See SPARCstation 2 Installation Guide for more information on serial port mode jumpers.

  • Page 93: Figure 4-20 Top View Of System Unit's Internal Parts

    Boot Lithium Serial port PROM battery jumpers Back panel SPARC floating point unit (FPU) SPARC integer unit (IU) Power supply SBus slots SIMM SIMM slots slots Cache controller Hard Hard drive drive Diskette drive Front panel System assembly speaker Figure 4-20 Top View of System Unit’s Internal Parts FRU Replacement...

  • Page 94: Figure 4-21

    A Figure 4-21 Serial Port Jumpers RS232 RS423 Figure 4-22 Preset RS-423 Jumper Positions 6. Use a pair of needlenose pliers and move both jumpers from the RS-423 positions to the RS-232 positions. SPARCstation 2 Field Service Manual—February 1991...

  • Page 95: Main Logic Board Voltage Test Points

    RS232 RS423 Figure 4-23 RS-232 Jumper Positions 7. Replace the top cover of the system unit. To do this, see “Replacing the System Unit’s Cover” near the end of this chapter. 8. Turn the power of the system unit on, and check for proper operation of the system unit.

  • Page 96: Figure 4-24 Pin Location Of Power Supply Connector (J0701)

    +12V +12V -12V Power On Reset ocation of Power Supply Connector (J0701) Figure 4-24 Pin L SPARCstation 2 Field Service Manual—February 1991...

  • Page 97: Figure 4-25 Main Logic Board Layout

    Back Panel J0503 TTY B J0502 TTY A J0404 J0403 SCSI J0601 J0504 E-NET SPARC SCSI E-NET Ctlr SPARC CACHE MMU+ Ctlr J0705 MMU+ MMU+ Ctlr MMU+ MMU+ MMU+ MMU+ SBus Slot 3 SBus Slot 2 SBus Slot 1 J0704 J0701 SIMM SIMM...

  • Page 98: Table 4-3 Main Logic Board Parts Layout: Legend

    Audio Input/Output cable connector J0602 System Speaker and LED connector J0701 Power Supply connector J0702 Hard Drive 2 power connector J0703 Hard Drive 1 power connector J0704 Diskette drive power connector J0705 Memory/SBus expansion connector SPARCstation 2 Field Service Manual—February 1991...

  • Page 99: Before Replacing The Main Logic Board

    Table 4-4 List of Acronyms Acronyms Full Expression Direct Memory Access MMU+ Memory Management Unit+ NVRAM Non-Volatile Random Access Memory PROM Programmable Read-Only Memory Random Access Memory SCSI Small Computer System Interface SIMM Single Inline Memory Module Caution – Printed circuit boards are made of delicate electronic components that are extremely sensitive to static electricity.
  • Page 100 5. Connect a terminal to the system unit. For details, see the SPARCstation 2 Installation Guide. 6. This enables you to view output of the POST test results as they are run. 7. Disconnect the graphics monitor and the Ethernet connectors.
  • Page 101 The wire colors are the following: +5 V Blue +12 V Brown -12 V Gray Por (Power On Reset from the power supply) Black Ground Note – The Por Signal is a TTL open collector and pull up is on the main logic board.
  • Page 102 Figure 2-4). The other twelve SIMM Slots will be tested by the POST memory diagnostics and errors will be reported. Memory error messages on the system monitor display usually include a physical memory address SPARCstation 2 Field Service Manual—February 1991...
  • Page 103 24. At the > or ok prompts, turn off the system’s power switch. 25. Disconnect the terminal and reconnect the graphics monitor and the Ethernet connector. To reconnect the graphics monitor see “Installing Your Monitor” in Appendix C of the SPARCstation 2 Installation Guide. This completes the procedure. FRU Replacement...

  • Page 104: Removing The Main Logic Board

    (see Figures 4-25 and 4-26). 12. Disconnect the 34-line diskette data (J0501) and power cables (J0704) from the connectors on the main logic board (see Figures 4-27 and 4-26) and fold them out of the way. SPARCstation 2 Field Service Manual—February 1991...

  • Page 105: Preparing Main Logic Board For Replacement

    13. Disconnect the hard disk drive data (J0401 and J0402) and power cables (J0702 and J0703) from the data and power connectors on the main logic board (see Figures 4-25 and 4-26). Fold them out of the way. 14. With an IC extractor or a small flat-bladed screwdriver, remove the NVRAM chip (see Figure 4-25 and Table 4-3 for the location of the NVRAM chip) from its socket slowly and evenly.

  • Page 106: Replacing The Main Logic Board

    10. Connect the LED/Speaker cable assembly to connector J0602 in the right front corner of the main logic board (see Figures 4-25 and 4-26). 11. Re-install the SIMMs into their original sockets. See “SIMMs” earlier in this chapter for the correct locations. SPARCstation 2 Field Service Manual—February 1991...
  • Page 107 Note – Bank 0 must be filled with SIMMs or the system will not pass its power- on self test. 12. Re-install the SBus boards as directed in “SBus Boards” earlier in this chapter. 13. Connect all of the cables to the ports at the rear of the system unit. 14.

  • Page 108: Figure 4-26 Removing And Replacing The Main Logic Board

    530-1451 Hard drive 1 power cable 530-1453 Main logic board Front panel of system unit Securing screw Back panel of system unit Securing screw Removing and Replacing the Main Logic Figure 4-26 Board SPARCstation 2 Field Service Manual—February 1991...

  • Page 109: Boot Prom

    Boot PROM This section explains how to remove and replace the boot PROM on the main logic board. To remove and replace the boot PROM, follow these steps: 1. Before removing and replacing the boot PROM, you should have verified that the boot PROM needs to be replaced.

  • Page 110: Nvram/Tod

    7. Locate the NVRAM/TOD chip (see Figures 4-25 and 4-26). Remove the NVRAM/TOD chip. To do this use an IC extractor or a small flat-bladed screwdriver and remove the NVRAM/TOD chip from its socket slowly and evenly. SPARCstation 2 Field Service Manual—February 1991...

  • Page 111: Speaker

    8. Insert the new NVRAM/TOD chip in the socket. To do this, match the pin 1 indicator on the NVRAM/TOD chip with the indicator on the socket. Holding the NVRAM/TOD chip at the edges, carefully align the pins and insert the NVRAM/TOD chip in the socket. Note that inserting the chip backwards will damage the chip.
  • Page 112 If either of the sound tests pass, do not replace the speaker. Replace the LED/speaker assembly or the main logic board only if the LED does not light (see step 3). SPARCstation 2 Field Service Manual—February 1991...
  • Page 113 To remove the speaker, follow these steps: 1. Read the parts of Chapter 3 about how to halt your system, tools needed, removing expansion units, attaching a wrist strap, and removing the system unit’s cover. 2. Check that the green LED at the front of the chassis is not lit. 3.

  • Page 114: Replacing The System Unit's Cover

    (if equipped) and seats into the security loop slot on the bottom of the chassis. 4. Insert the two screws that hold the top cover to the back panel. 5. Tighten the two screws with a screwdriver SPARCstation 2 Field Service Manual—February 1991...

  • Page 115: Connecting The Desktop Storage Pack

    Plastic tabs Security loop Insert and tighten screws in back panel. Figure 4-27 Replacing the System Unit’s Cover Connecting the Desktop Storage Pack To connect the Desktop Storage Pack (DSP) to the system unit: 1. Connect the connector on the SCSI cable to the SCSI port on the system unit’s back panel.

  • Page 116: Video Monitors

    Video Monitors There are several different types of monitors and cabling. The color and grayscale monitors use cables with 13W3 connectors. See Appendix C of the SPARCstation 2 Installation Guide for more specific information on monitors and monitor cables. Mouse The optical mouse connects to one of two jacks in the back of the keyboard.
  • Page 117 Turn the power switches on in this order: • Monitor • External drive (if you have one) • System Unit After a minute or so, you should see the login prompt. system messages system messages system messages system messages system messages system messages system messages system messages...
  • Page 118 SPARCstation 2 Field Service Manual—February 1991...

  • Page 119: Systemspecifications

    SystemSpecifications This appendix contains system specifications, including dimensions, electrical and power requirements, environmental requirements, and compliance with electrical and safety regulations. Regulatory Compliance Table A-1 lists regulatory compliance information. Table A-1 Regulatory Compliance Information PRODUCT SAFETY UL 478 CSA C22.2 No. 154 IEC 380 FCC Class B VDE Class B...

  • Page 120: Input Power Requirements

    Input Power Requirements Table A-2 lists the input power requirements for the system unit. The maximum power dissipated is less than or equal to 120 watts. The power supply automatically selects the correct AC voltage range. Table A-2 Input Power Requirements and Power Dissipation for the System Unit Operating Maximum Maximum...

  • Page 121: Physical Specifications

    Physical Specifications Table A-4 lists the physical specifications for the system unit, the keyboard, the optical mouse, and selected monitors. Table A-4 Table of Physical Specifications Component Height Width Depth Net Weight System Unit 2.8 in (7.1 cm) 16 in (40.9 cm) 16 in (40.9 cm) 25 lbs (11 kg) Keyboard...
  • Page 122 SPARCstation Field Service Manual—February 1991...

  • Page 123: Illustratedpartsbreakdown

    IllustratedPartsBreakdown This appendix illustrates how to connect the system’s component parts and presents global views of the system. Parts Breakdown Figure B-1 illustrates system interconnection. Table B-1 gives part numbers of the system components. Figure B-2 shows exploded view of the system unit. Figure B-3 illustrates exploded view of the system unit showing drive brackets.

  • Page 124: Figure B-1 System Interconnection

    AC power cable (monitor) 180-1146 (115 V) or 180-1125 (240 V) Mouse and Mousepad 370-1170 and 370-1368 Monitors See “Video Monitors” in Chapter 4 AC power cable (system unit) 180-1179, 180-1177, 180-1178, 180-1176, 180-1097 SPARCstation 2 Field Service Manual—February 1991...
  • Page 125 Main logic board Cover 540-1993 501-1638 Main logic board (0MB) 501-1744 Figure B-2 Exploded View of the System Unit Illustrated Parts Breakdown...
  • Page 126 Drive 2 Drive 1 Screw 240-1531 Hard drive Hard drive Hard drive Screw data cable power cable plastic bracket 240-1141 530-1451 530-1453 330-1343 Figure B-3 Exploded View of the System Unit Showing Drive Bracket SPARCstation 2 Field Service Manual—February 1991...

  • Page 127: Figure 4-5

    From LED/speaker Hard drive 2 Hard drive 2 Chassis assembly data cable power cable 540-2071 540-2072 530-1451 530-1453 Diskette drive data cable 530-1452 12-pin cable from power supply 300-1038 Diskette drive power cable 530-1679 Hard drive 1 Frame buffer data cable board 530-1451 Hard drive 1...
  • Page 128 SPARCstation 2 Field Service Manual—February 1991...

  • Page 129: Frulist

    FRUList FRU List This appendix lists the part number and description of each FRU for the SPARCstation 2. Table C-1 lists the FRU by field replaceable unit, part number and description. Table C-1 FRU List (continued on next page) Field Replaceable Unit...
  • Page 130 Video Cable 4 ft. (1.2 m) 530-1451 Hard Disk Drive Data Cable 530-1452 Diskette Drive Data Cable 530-1453 Hard Disk Drive Power Cable 530-1509 Video Cable 14.8 ft. (4.5 m) 530-1679 Fan/Diskette Drive Power Cable ("Y" Power Cable) SPARCstation 2 Field Service Manual—February 1991...

  • Page 131: Openbootprom

    Random Access Memory (NVRAM) parameters used during reset. Open Boot PROM In comparison with the SPARCstation 1+ and the SPARCstation IPC, the SPARCstation 2 has different boot paths. See Table D-1 for details. Table D-2 shows the value and default value for each of the NVRAM parameter.
  • Page 132 Table of Alias and Boot Paths Alias SPARCstation 2 SPARCstation 1+ Boot paths and IPC Boot Paths disk0 /sbus/esp/sd@3,0 sd(0,0,0) disk1 /sbus/esp/sd@1,0 sd(0,1,0) disk2 /sbus/esp/sd@2,0 sd(0,2,0) disk3 /sbus/esp/sd@0,0 sd(0,3,0) tape0 /sbus/esp/st@4,0 st(0,0,0) tape1 /sbus/esp/st@5,0 st(0,1,0) cdrom /sbus/esp/sd@6,0:c sd(0,6,2) /sbus/le SPARCstation 2 Field Service Manual—February 1991...
  • Page 133 Table D-1 Table of NVRAM Parameters NVRAM Parameter Name Value Default Value name options options selftest-#megs oem-logo oem-logo? false false oem-banner oem-banner? false false output-device screen screen input-device keyboard keyboard sbus-probe-list 0123 0123 scsi-initiator-id keyboard-click? false false keymap diag-file diag-device boot-file boot-device disk...
  • Page 134 SPARCstation 2 Field Service Manual—February 1991...

  • Page 135: Glossary

    Amperes root mean square. RMS is often used in power measurements for electronic equipment. board See printed circuit board. In the SPARCstation 2, a board occupies one or more SBus slots. boot To load the system software into memory and start it running.
  • Page 136 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 SPARCstation 2. The external unit containing the tape drive is referred to as the Desktop Backup Pack. The external unit containing a disk drive is specifically referred to as the Desktop Disk Pack.
  • Page 137 Forth Toolkit. If disaster befalls your operating system, the Monitor automatically starts. Monitor 2) A video display unit that is part of the SPARCstation 2. It is not the same thing as a terminal. Memory Management Unit.
  • Page 138 On-Board Diagnostics Is a test that allows you to test the control registers, the network controller, the diskette drive system, memory, the cache, the system clock, and watch the network for valid packets Power-On reset TTL open collector signal from the power supply, which is activated after DC voltages have risen.
  • Page 139 A device that consists of a video display and keyboard that is used to type and display information. A terminal may be connected to either of the RS- 423/RS-232 serial interface ports on the back panel of the SPARCstation 2. It is not the same thing as a monitor.
  • Page 140 SPARCstation2 Field Service Manual—February 1991...

  • Page 141: Index

    14, 54 Color Frame Buffer Board input/output port component parts autoboot switch 3, 8 components connector power supply backpanel cover battery removing block diagram replacing SPARCstation 2 3, 9 block level diagram preparing for replacement boot mode...
  • Page 142 FRUs board on-board controller chip overview 8, 15 expansion modules when to use disconnecting diagram 8, 15 block, SPARCstation 2 expansion units 15, 60 disk drive external drive units preparing External Storage Module SPARCstation 2 Field Service Manual—February 1991...
  • Page 143 connecting halting the system disconnecting 3, 15, 60 hard disk drive preparing removing replacing fan assembly removing hung system replacing field replaceable units identification input power requirements replacement input/output field-replaceable units integer unit boards and module interior floating-point coprocessor system unit floating-point unit 16, 68 floppy disk drive...
  • Page 144 SIMM slots keyboard 14, 46 SIMMs ports installing serial ports A and B 48, 51 removing 21, 24 POST 14, 46 single inline memory modules power 48, 51 removing 34, 35 turning off SPARCstation 2 Field Service Manual—February 1991...
  • Page 145 SPARCstation 2 block diagram wrist strap 3, 95 speaker attaching removing replacing trouble shooting speaker clip standalone programs Sundiag system exerciser SunDiagnostic Executive system interconnection interior monitor unit unit’s cover removing replacing test points tools needed to replace FRUs...
  • Page 146 SPARCstation 2 Field Service Manual—February 1991...

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