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SPARCstation 20 Service Manual

1. 10 1112 13 14 15 16 17 8 FIGURE 4 1 Power Supply Connector Pinouts 30 SPARCstation 20 Service Manual July 1996 Power supply connector Power supply External power cord FIGURE 4 2 Power Supply and Power Supply Connector Location TABLE 4 2 Power Supply Connector Pin Assignments Pin Color Description Pin Color Description 1 Blue 12 10 Black Ground 2 Brown 12 11 Black Ground 3 Red 5 12 Black Ground 4 Red 5 13 Black Ground 5 Red 5 14 Black Ground 6 Red 5 15 Black Ground 7 Red 5 16 Green AC Outlet 8 Red 5 17 Purple Fan 9 Grey Power Off 18 Yellow Power On Note All voltages are correct if they are within the 5 or 5 range System Board Test To test the system board Chapter 4 Troubleshooting Procedures 1 32 Connect a terminal to serial port A or use a tip connection to another workstation to receive additional POST failure information See Setting Up a tip Connection on page 19 Press and hold the keyboard Stop L1 and D keys While holding the keys down turn the system power switch on Release the keys Watch the keyboard LEDs m The Caps Lock key on the keyboard should flash indicating that the system is executing the POST m Ifthe Caps Lock key
2. q AANA amannan Key notches FIGURE 11 24 NVSIMM Battery Side Removing a SIMM Refer to FIGURE 11 25 and proceed as follows Caution The installed SIMMs are specifically designed to operate in the SPARCstation 20 system Do not remove DSIMMs VSIMMs or NVSIMMs from different Sun systems and install them in a SPARCstation 20 system Chapter 11 System Board and Component Replacement 161 connector Be sure the power cord is connected to a grounded wall receptacle and that the system unit power switch is set to standby Verify that the green LED at the chassis front is off Caution Do not disconnect the power cord from the system unit back panel SIMMs location 00201 bank 0 00202 bank 2 00203 bank 5 J0301 bank 3 J0302 bank 6 ee J0303 bank 1 j VSIMM 0 J0407 J0304 bank 7 ll VSIMM 1 20406 J0305 bank 4 J0304 can be used for VSIMMs or DSIMMs J0305 can be used for DSIMMs VSIMM or a NVSIMM 00 FIGURE 11 25 SIMM Slot Locations 1 Remove power from the system See Removing Power from the System on page 45 2 Remove the cover and attach the wrist strap See Chapter 7
3. Notch location FIGURE 11 30 Aligning the NVSIMM in the Slot Back View Note The notched part of the NVSIMM should be near the center of the system board Caution Use care when aligning the NVSIMM center notch with the connector frame If the center notch is not properly aligned the NVSIMM could be damaged when inserted 8 Place the grooved surface of the insertion tool at a 90 degree angle on the upper edge of the SIMM FIGURE 11 31 and FIGURE 11 32 166 SPARCstation 20 Service Manual July 1996 Grooved surface a FIGURE 11 31 Inserting a DSIMM Grooved surface 4 FIGURE 11 32 Inserting a VSIMM NVSIMM 9 Put the heel of each hand on each side of the insertion tool pushing surface Press firmly with both hands on the tool until the SIMM snaps into place Note When installing a VSIMM in slot J0305 an AVB must also install See Auxiliary Video Board on page 168 10 Remove the insertion tool Chapter 11 System Board and Component Replacement 167 11 Remove the wrist strap and replace the cover See Chapter 7 12 Turn on system power See Chapter 6 168 Auxiliary Video Board To remove and install an auxiliary video board AVB proceed as follows Note If installing a VSIMM in slot 10305 an AVB must be installed to provide video output for the second VSIMM The SPARCstation 20 system can accommodate one AVB Removing an AVB
4. System board Speaker LED connector FIGURE 8 7 Speaker LED Cable Installing the LED Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Position the LED near the tabs and light pipe at the corner of the system FIGURE 8 6 Use the tip of a small flatblade screwdriver to work the shrink wrapped LED wires through the tabs FIGURE 8 6 Route the LED wires along the top front edge of the chassis and connect them to the Speaker LED in line connector FIGURE 8 7 Chapter 8 Removing and Installing Subassemblies 3 4 Detach the wrist strap and replace the cover See Chapter 7 5 Power on the system See Turning On the Power on page 47 gt Speaker To remove and install the internal speaker proceed as follows Removing the Speaker Remove power from the system See Removing Power from the System on page 45 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Caution Avoid damaging the speaker surface use care when working near or handling the speaker
5. 0 0 0 0 07M 00000 0 0 0 00 0 0 0 0 0 0 ayo jojo 0 ojoj jojjo DC input FIGURE 9 6 SunCD 2Plus Rear View and Jumper Settings SCSI data interface connector aes o o of 1 DC input Parity Prevent Allow FIGURE 9 7 SunCD 4 Drive Rear View and Jumper Settings 2 Place the CD ROM drive above the drive bracket slots Chapter9 Storage Devices 125 Note The drive grommets slide into the drive bracket slots The drive sits on a shelf above the diskette drive 3 Install the CD ROM drive as follows FIGURE 9 8 a Connect the SCSI data cable and the DC power cable to the CD ROM drive b Push the CD ROM drive down and toward the center of the unit so that the drive is properly seated in the drive bracket 4 Detach the wrist strap and replace the cover See Chapter 7 5 Power on the system See Turning On the Power on page 47 CD ROM drive Bracket Drive bracket FIGURE 9 8 Installing 8 CD ROM Drive Diskette Drive The optional internal diskette drive is located below the CD ROM drive adjacent to the power supply 126 SPARCstation 20 Service Manual July 1996 To remove and install a diskette drive proceed as follows Note If a CD ROM drive is installed it must be removed before a diskette drive can be remo
6. Autoboot true No true default No Boot from Boot from Probe SBus POST device alias device alias devices and net disk interpret their passed drivers Display errors on keyboard LEDs and serial port A FIGURE 2 1 10 SPARCstation 20 Service Manual July 1996 Default Boot Mode OpenBoot PROM Version 2 14 or Later ok prompt Boot user specified device and program Diagnostic Tools Diagnostic tools include power on self test POST OpenBoot PROM diagnostics SunDiag system exerciser and Sun verification test suite GSunVTS A description of the POST is provided in Chapter 3 TABLE 2 1 lists the diagnostic tools and provides a description of each TABLE 2 2 lists switch settings and results for the autoboot switch and the diagnostic switch Descriptions of the OpenBoot PROM diagnostics the SunDiag system exerciser and SunVTS are provided in the following sections TABLE 2 1 Diagnostic Tools Diagnostic Description Power On Self Test OpenBoot PROM SunDiagSystem Exerciser Solaris 1 1 1 Rev B 1 1 2 2 3 2 4 SunVTS Solaris 2 5 and later Locates and diagnoses trouble in system board DSIMM in slot 0 MBus modules and NVRAM Resides in the OpenBoot PROM Initialized at power on when the keyboard Stop L1 d keys are pressed and held or if the diag switch parameter is set to tru
7. TOD Registers Test System Counter Test MSI MSBI Control Reg Tests IOMMU CAM NTA Pattern Test IOMMU TLB NTA Pattern Test IOMMU CAM TLB Comparator Test IOMMU TLB Flush Tests DMA2 MACIO ID Register Test DMA2 MACIO E_CSR Reg Test ANCE Address Port Tests ANCE Data Port Tests DMA2 MACIO D_CSR Reg Test DMA2 MACIO D_ADDR Reg Test DMA2 MACIO D_BC Reg Test DMA2 MACIO D_NADDR Reg Test ESP Registers Tests DMA2 MACIO P_CSR Reg Test DMA2 MACIO P_ADDR Reg Test DMA2 MACIO P_BC Reg Test PPORT Registers Tests DMA2 MACIO PPORT IO Lpbck Tst DMA2 MACIO PPORT XFR Lpbck Tst SPARCstation 20 Service Manual July 1996 POST Error Messages Most POST error messages are displayed at the system monitor and are self explanatory Use the error messages returned by POST to troubleshoot the system CODE EXAMPLE 3 4 lists typical POST error messages CODE EXAMPLE 3 4 Typical POST Error Messages STATUS Power On SelfTest FAILED SIMM lt J0201 gt Not Installed STATUS Power On SelfTest FAILED Replace MBUSO Module STATUS Power On SelfTest FAILED Replace MBUS1 Module STATUS Power On SelfTest FAILED Replace Main Logic Board STATUS TMS3902Z55 and 15390250 Modules can NOT be mixed No POST run Note In CODE EXAMPLE 3 4 the last error message indicates that an MBus processor module with external cache has been installed into the system with an MBus module wi
8. Note Do not force the drive handle If the drive handle does not move easily into the latched position remove the drive and repeat Steps 3 and 4 If a hard disk drive is not installed in the top position SCSI address 1 can be used by an external peripheral connected to the SCSI bus However if a hard disk drive is installed at the top position the top position disk drive assumes SCSI address 1 and the external peripheral must either be re jumpered to a new SCSI address or disconnected from the SCSI bus Remove the wrist strap and replace the cover See Chapter 7 Power on the system See Turning On the Power on page 47 Chapter9 Storage Devices 121 FIGURE 9 4 Installing a Hard Disk Drive 122 SPARCstation 20 Service Manual July 1996 CD ROM Drive The SPARCStation 20 system is configured with one of two types of CD ROM drives a 1 inch SunCD 2Plus drive and a 1 6 inch SunCD 4 drive To remove and install a CD ROM drive proceed as follows Note After removing a SunCD 2Plus or a SunCD 4 CD ROM drive be sure that the same drive type is installed Removing a CD ROM Drive Remove power from the system See Removing Power from the System on page 45 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in ant
9. 3 Remove the wrist strap and replace the cover See FIGURE 11 33 4 Turn on system power See Chapter 6 Back panel AVB connector FIGURE 11 35 Installing the Auxiliary Video Board 170 SPARCstation 20 Service Manual July 1996 System Board The following sections describe how to remove and install the system board and verify jumper settings Removing the System Board Remove power from the system See Removing Power from the System on page 45 Remove the cover and attach the wrist strap See FIGURE 11 33 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Remove the following MBus modules see MBus Module on page 143 SBus cards see SBus Card on page 152 SIMMs see DSIMMs VSIMMs and NVSIMMs on page 159 AVB see Auxiliary Video Board on page 168 NVRAM TOD see Removing a NVRAM TOD on page 180 Note The NVRAM TOD contains system configuration parameters the Ethernet address and host ID numbers Install the removed NVRAM TOD on the replacement system board to preserve this information Disconnect the following from the system board FIGURE 11 36 Diskette connector optional SCSI connector DC power connector Speaker LED connector Chapter 11 System Board and Component Replac
10. an antistatic wrist strap and use an ESD protected mat Store ESD sensitive Caution Use proper ESD grounding techniques when handling components Wear components in antistatic bags before placing it on any surface 3 Place an antistatic surface next to the system Caution Hot surface Avoid contact Surfaces are hot and may cause personal injury if touched 162 SPARCstation 20 Service Manual July 1996 4 Using the eraser end of a pencil move the ejection lever away from the SIMM to be removed FIGURE 11 26 1 ia el Ejection levers FIGURE 11 26 SIMM Ejection Levers Note Ejection levers are enlarged to show detail 5 Grasp the upper comers of the SIMM and lift to remove the SIMM from the slot 6 Place the SIMM on an antistatic surface Installing a SIMM Note Inspect the contents of the shipping box Verify that a SIMM is in an antistatic bag and an antistatic wrist strap is supplied After unpacking the contents of the shipping box store the shipping box and packing material for future use Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 1 Locate the SIMM slots on the system board FIGURE 11 25 Slot 0201 must have a DSIMM installed for the system to function pr
11. Remove power from the system See Removing Power from the System on page 45 Remove the cover and attach the wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Locate the AVB FIGURE 11 33 If an SBus card is installed above the AVB remove the SBus card See Removing an SBus Card on page 152 Grasp the upper corners of the AVB and lift to remove the AVB from the slot FIGURE 11 33 Place the AVB on an antistatic surface SPARCstation 20 Service Manual July 1996 1 33 AVB Installed FIGURE 1 Back panel 1 34 Removing the AVB FIGURE 1 169 Chapter 11 System Board and Component Replacement Installing an AVB Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 1 Locate the AVB slot 2 Install the AVB as follows FIGURE 11 35 a Insert the back edge of the AVB between the tabs on the back panel b Push the AVB connector into the slot c Hold the corners of the AVB d Press down firmly until the AVB connector is firmly seated in the slot Caution Excessive force may bend or damage the pins
12. rest Lease Tests Pair Test Tests Tests EXC Test FPU SP Overflow CEXC Test FPU SP Underflow 0 EXC Test Sample Listing of the Full Diagnostic Mode Test POST version xxx 1Mb External cache 5390255 3 1Mb External cache 5390255 3 CPU_ 1 NOT installed PU_ 3 NOT installed lt lt lt CPU_00000000 on MBus 5106 00000000 lt lt lt IS RUNNING MID 0000008 ESDATA RAM MXCC_CSR 00000000 Chapter 21 22 CODE EXAMPLE 3 3 5 5 5 5 5 D PU DP D D D D D D PU DP emory tem gt n O Hh EE ea m a e a a a g g a agoret ta 2 2 0 O Sample Listing of the Full Diagnostic Mode Test Continued P Divide by 0 CEXC Test Inexact CEXC Test UE Trap Priority gt rap Priority lt Trap Priority Test lest lest Invalid CEXC Test Overflow C Underflow Divide by 0 0 XC Test EXC Test CEXC Test Inexact CEXC Test UE CE Trap Priority gt rap Priority gt rap Priority rap Priority Address Pattern lest rest Test Test rest Interrupt Regs Tests ROCO Interrupt Regs Tests t Interrupts OFF Test Interrupts ON Test ROCO User Timer Test ROCO Counter Timer Test
13. Active low signal 13W3 Connector TABLE C 7 lists the pin assignments and signal descriptions for the 13W3 connector Note Connector 13W3 is not enabled unless a VSIMM is installed into SIMM slot 304 FIGURE 0 7 13W3 Connector TABLE 0 7 13W3 Connector Pin Assignments Pin Function 1 0 Level Signal Description Al Red O Analog Video A2 Green O Analog Video A3 Blue O Analog Video 1 Serial Read I TTL Serial read 2 Vert Sync O TTL Vertical sync 3 Sense gt 0 lt I TTL Sense 4 Ground O GND Ground Appendix C System Board Connector Pinouts 215 TABLE 0 7 13W3 Connector Pin Assignments Pin Function VO Level Signal Description 5 Comp Sync O GND Composite sync 6 Hort Sync 0 TTL Horizontal sync 7 Serial Write O TTL Serial write 8 Sense lt 1 gt I TTL Sense 9 Sense lt 2 gt I TTL Sense 10 Ground None GND Ground Audio Ports The audio ports include headphone connector microphone connector audio line in connector and audio line out connector TABLE C 8 lists the pin assignments and signal descriptions for the audio ports 0 FIGURE 0 8 Back Panel Audio Ports and Icons TABLEC 8 Audio Port Signals Headphone Microphone old Microphone new Line Out Line In Tip Left Channel Mono In Left Channel Left Channel Left Channel Ring Right Channel Microphone power Right Channel Right Channel Right Channel Center Shield Return Ground Return Return Return 216 SPARCstation
14. CHAPTER 3 Power On Self Test POST The Power on self test POST diagnostics reside in the OpenBoot PROM which is located on the system board There are three POST modes normal full diagnostic and abbreviated diagnostic The following is a list of the POST diagnostic topics presented in this chapter Normal Mode When the system is turned on in normal mode the POST is not executed and control is sent to the OpenBoot PROM If autoboot is enabled set to true the operating system is loaded If autoboot is disabled system initialization stops when the ok prompt is displayed Full Diagnostic Mode Full diagnostic mode tests the system board components and the installed MBus modules POST is executed if one of two actions occur m Press and hold the Stop L1 and D keys while system power is being applied m Set the diag switch NVRAM parameter to true in the OpenBoot PROM 18 CODE EXAMPLE 3 1 provides a typical POST progress message that is displayed through serial port A CODE EXAMPLE 3 1 Typical POST Progress Message n CC SPARCstation 10 20 UP MP POST version xxx Q PU_ 0 TI TMS390Z55 3 x 1Mb External cache PU_ 2 TI TMS390Z55 3 x 1Mb External cache Q Q PU_ 1 NOT installed PU 3 lt NOT installed SEFERE Q lt lt lt CPU_00000000 on MBus 5106 00000000 lt lt lt IS RUNNING MID 0000008 oO MMU Context Table Reg
15. Removing Power from the System on page 45 2 Remove the cover and attach the wrist strap See Chapter 7 117 an antistatic wrist strap and use an ESD protected mat Store ESD sensitive Caution Use proper ESD grounding techniques when handling components Wear components in antistatic bags before placing it on any surface 3 Determine which drive to remove FIGURE 9 1 the system supports up to two internal hard disk drives Note Remove the top disk drive before removing the bottom disk drive Note The disk drive position determines the assigned SCSI address When installed the bottom disk drive is assigned SCSI address 3 and the top disk drive is assigned SCSI address 1 FIGURE 9 1 Location of Hard Disk Drives Caution When installing the hard disk drive do not change the disk drive position The system software expects the disk drive to be at a specific SCSI address 4 Press the plastic latch located beneath the handle at the rear of the drive to release the handle FIGURE 9 2 118 SPARCstation 20 Service Manual July 1996 Handle partially lifted Single connector pivot point FIGURE 9 2 Single Connector Hard Disk Drive Lift the drive handle up FIGURE 9 3 Note When lifted the drive handle pivots to disconnect the drive from the socket on the SCSI backplane Grasp the drive handle and lift the drive straight up and out of the chassis Pl
16. SPARCstation 20 Service Manual July 1996 1 2 3 4 5 5 5 6 52 o Ji T Qoo C 5 y gt PP a o o j o 0 od 14 13 12 11 10B 9 8 6 Legend 1 Power On Standby switch 7D Audio line in 2 AC power outlet 8 SCSI 3 Lock block 9 Twisted pair Ethernet 4 MBus 10A Parallel 5 SBus 10B AUI Ethernet 6 AVB 13W3 video 11 Keyboard 7A Audio headphone 12 Serial port A B 7B Audio microphone 13 13W3 video 7C Audio line out 14 AC power receptacle FIGURE 1 4 SPARCstation 20 System Unit Rear View Chapter 1 Product Description 5 6 Software Requirements TABLE 1 1 lists the various system configurations and the corresponding software requirements TABLE 1 1 SPARCstation 20 System Configurations and Software Requirements Configuration Software Requirements Basic System Solaris 1 1 1 Version B software environment SunOS 4 1 3_U1 Version B or later Solaris 1 x releases Solaris 2 3 SunOS 5 3 software environment and Solaris 2 3 Supplement Revision B or later Solaris 2 x releases Multiprocessor Solaris 2 3 SunOS 5 3 software environment and Solaris 2 3 versions Supplement Revision B or later Solaris 2 x releases Systems Solaris 2 3 SunOS 5 3 software environment with Solaris 2 3 configured with Supplement Revision B or later Solaris 2 x rel
17. 1 Position the system board over the back of the chassis so that the SIMM slots are facing the drive siderails and the chassis front 2 Lift the back edge of the system board slightly ensuring that the foot on the underside of the system board does not catch the metal edge of the chassis FIGURE 11 40 Drive bracket System board FIGURE 11 40 Installing the System Board 3 Position the system board edges into the plastic card guides slide the system board toward the chassis front 4 Tighten the captive screws at the back of the chassis FIGURE 11 41 Chapter 11 System Board and Component Replacement 175 176 Note Do not overtighten captive screws Ensure that the configuration of the replacement system board is identical to the removed system board Remove any SBus or MBus filler panels from the replacement system board as necessary Replace the following NVRAM TOD see Installing a NVRAM TOD on page 181 AVB see Auxiliary Video Board on page 168 SIMMs see DSIMMs VSIMMs and NVSIMMs on page 159 SBus cards see SBus Card on page 152 MBus modules see MBus Module on page 143 JI e 0 70000 p 5 Captive screw Captive screw FIGURE 11 41 System Board Captive Screws Note It is not necessary to remove the OpenBoot PROM from the defe
18. SunCD 2Plus drive type chassis 110 double wide MBus module 150 SBus card 157 fan 67 grommets 131 hard disk drive 120 122 NVRAM TOD 181 SBus card 156 SCSI data cable SunCD 2Plus drive type chassis 91 SunCD 4 drive type chassis 96 single wide MBus module 146 SBus card 157 speaker 66 subassemblies 55 system board 175 interior view of system 3 internal access 49 cables SunCD 2Plus drive type chassis 89 99 SunCD 4 drive type chassis 94 104 236 SPARCstation 20 Service Manual July 1996 internal options 6 J jumper serial port 174 setting 121 clock speed 173 serial port 173 SunCD 2Plus 125 SunCD 4 drive 125 K kernel SunVTS 15 keyboard 14 keyboard connector 209 keyboard mouse pin assignments 209 L LED 23 cable 60 Caps Lock 25 Compose 25 in line connector 60 61 light pipe 61 Num Lock 25 removing 60 Scroll Lock 25 shrink wrapped wires 61 states and meaning 25 tabs 61 LED light pipe detail 62 light pipe 61 lithium battery 42 location diskette drive 127 lock block screw 49 locking MBus module retainers 152 M MACIO ASIC 202 functional block diagram 203 major components system board 188 mat antistatic 40 MBus module 143 backplane screws 148 backplane washers 148 card extractor 144 locking retainers 152 retainers 144 147 memory 1 35 198 messages boot 47 microphone connector 217 module info 14 228 mouse connector 209
19. installing 170 removing 168 169 B back panel audio ports 216 captive screws 90 100 104 icons 216 SBus slots 90 100 battery lithium 42 block diagram system board 197 boards 2 boot messages 47 bracket drive 121 C cable fan DC power 70 74 guide detail 92 null modem 19 serial connection 19 trough 77 80 cables attaching SPARCstation 20 135 captive screw 56 58 backpanel 175 system board 172 176 cautions xx CD ROM drive 123 connector optional 74 DC power connector 70 filler panel 128 installing 124 126 removing 123 124 Index 3 clock chip 204 command output message multiprocessor module info 228 probe scsi 227 probe scsi all 227 test 222 test all 222 uniprocessor module info 228 watch clock 223 watch net 224 watch net all 226 watch tpe 225 completing POST 25 component replacement 143 components 2 connecting DC power connector 177 diskette connector 177 SCSI connector 177 speaker LED connector 177 connector 13W3 215 audio line in 217 line out 217 audio line in 217 audio line out 217 AUI 207 CD ROM optional 74 headphone 217 keyboard 209 LED in line 60 61 microphone 217 mouse 209 parallel 205 SCSI 212 serial ports A and B 210 single 117 speaker 66 speaker spade 65 system back panel 4 twisted pair Ethernet 211 controller SCSI 34 corner screw 49 cover removing 50 replacing 51 speaker 64 234 SPARCstation
20. DSIMM DSIMM DSIMM FIGURE 8 2 DSIMM Memory System The SPARCstation 20 system may contain one or more 32 Mbyte DSIMMs The Solaris 1 1 1 Version B or later software environment for the SPARCstation 20 system supports up to eight 32 Mbyte DSIMMs or any combination of 16 Mbyte 32 Mbyte and 64 Mbyte DSIMMs The Solaris 2 3 software environment requires kernel patch 101318 34 or later to support certain 32 Mbyte DSIMM configurations Install patch 101318 34 available from your local Answer Center if additional DSIMMs are installed to create one of the following memory combinations One 32 Mbyte DSIMM and seven 16 Mbyte or seven 64 Mbyte DSIMMs Two 32 Mbyte DSIMMs and five or more 16 Mbyte or 64 Mbyte DSIMMs Three 32 Mbyte DSIMMs and three or more 16 Mbyte or 64 Mbyte DSIMMs Four 32 Mbyte DSIMMs and one or more 16 Mbyte 32 Mbyte or 64 Mbyte DSIMMs Note Install the patch before installing the DSIMMs or the operating system will fail to boot 200 SPARCstation 20 Service Manual July 1996 VSIMM Two versions of the SPARCstation 20 VSIMM are available 4 Mbyte and 8 Mbyte The maximum available VSIMM memory capacities based upon possible memory allocations are as follows One VSIMM with seven DSIMMS 8 Mbytes Two VSIMMs with six DSIMMS 16 Mbytes The VSIMM contains a memory display interface MDI chip a video buffer chip VBC and a digital to analog converter DAC There is also
21. DSIMM 22 DSIMM1 DSIMM 3 DSIMM2 DSIMM J0301 DSIMM3 DSIMM 2 DSIMM4 DSIMM J0303 DSIMM5 J0407 VSIMMO J0304 default DSIMM6 J0406 VSIMM1 or NVSIMM J0305 DSIMM7 SPARCstation 20 Service Manual July 1996 Note A DSIMM must be installed in 10201 for the system to function properly Chapter 4 Troubleshooting Procedures 7 38 SPARCstation 20 Service Manual July 1996 CHAPTER 5 Safety and Tools Requirements This chapter provides a description of safety requirements symbols safety precautions and required tools Safety Requirements For your protection observe the following safety requirements Follow all cautions warnings and instructions marked on the equipment m Ensure that the voltage and frequency rating of the power outlet to be used matches the electrical rating labels on the system Use properly grounded power outlets To protect both yourself and the equipment observe the safety precautions listed in TABLE 5 1 39 TABLE 5 1 Safety Precautions Item Problem Precaution AC power cord Electric shock Unplug the AC cord from the AC wall socket before working on the power supply Grounding Leave the AC power cord plugged into the AC wall Power On Standby switch Wrist strap ESD ESD mat ESD Printed circuit ESD boards Cover System damage and overheating SBus and MBus System damage and slot filler panels overheating Heat sinks on Heat burns MBus module and system boa
22. Disconnect the power cable from the diskette drive FIGURE 9 11 128 SPARCstation 20 Service Manual July 1996 Disk drive power cable P4 FIGURE 9 11 Diskette Drive Power Cable 8 Disconnect the diskette drive data cable FIGURE 9 12 Chapter9 Storage Devices 129 Diskette drive data cable FIGURE 9 12 Diskette Drive Data Cable 9 Lift the diskette drive from the chassis place the diskette drive on an antistatic surface FIGURE 9 13 10 Remove the Phillips screws and grommets set screws and grommets aside FIGURE 9 13 130 SPARCstation 20 Service Manual July 1996 Diskette Diskette drive power cable Diskette drive data cable Diskette drive mounts Grommet 4 Diskette drive switch FIGURE 9 14 Installing Grommets and Setting the Diskette Drive Switch Chapter9 Storage Devices 131 Diskette drive Drive bracket slot Grommet FIGURE 9 15 Unseating the Diskette Drive Grommets Installing a Diskette Drive Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 1 Install the grommets and Phillips screws that were set aside in Step 4 of Removing a Diskette Drive on page 127 2 Set the diskette drive switch perform either Step 3a or Step 3b a If the diskette drive ha
23. Removing an SBus Card on page 152 Use a DIP IC extractor tool or a small flat blade screwdriver to remove the OpenBoot PROM FIGURE 11 43 Place the OpenBoot PROM on an antistatic surface OpenBoot PROM FIGURE 11 43 OpenBoot PROM Location SPARCstation 20 Service Manual July 1996 Installing an OpenBoot PROM Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Hold the OpenBoot PROM by the edges and align the notch on the OpenBoot PROM with the notch on the socket FIGURE 11 44 Caution Do not touch the OpenBoot PROM pins Align the OpenBoot PROM pins with the sockets insert the pins into the socket Note Press down firmly until the pins are seated into the socket Replace any SBus cards See Installing an SBus Card on page 156 Remove the wrist strap and replace the cover See Chapter 7 Turn on system power See Chapter 6 Chapter 11 System Board and Component Replacement 9 OpenBoot PROM notch Socket notch FIGURE 11 44 OpenBoot PROM Orientation NVRAM TOD To remove and install a NVRAM TOD proceed as follows Removing a NVRAM TOD 1 Remove power from the system See Removing Power from the
24. connected see Power Supply Test on page 29 and System Board Test on page 31 Shut down the system The SCSI controller or disk drive may be defective See Disk Drive Errors on page 33 and Power On Does Not Succeed on page 29 see also Chapter 9 Shut down the system Verify that every disk drive on the SCSI bus is set to a different SCSI address System internal drives are automatically assigned SCSI addresses as follows 3 bottom drive 1 top drive See Chapter 9 Verify that the power cord is connected to the monitor and the monitor is turned on Use a VOM to check voltages See Video Output Failure on page 28 27 System Problem TABLE 4 1 Troubleshooting Tips Corrective Action Read write or parity error reported by the Replace the disk drive indicated by the failure message operating system or applications The operating system identifies the bottom drive SCSI address 3 as 560 or 606360 The top drive SCSI address 1 is identified as sd1 0 Power on does not succeed keyboard key LEDs The power supply may be defective See Power Supply do not light and there is no tone from the Test on page 29 keyboard when system power is applied Power on does not succeed the system fails to The system board may be defective See System Board initialize but the keyboard key LEDs light and Test on page 31 there is a tone from the keyboard Video Output Failure T
25. multiprocessor 6 multiprocessor module info command output message 228 N null modem cable 19 NVRAM TOD installing 181 removing 180 NVSIMM 159 161 aligning in slot back view 166 battery side 161 165 inserting 167 0 ok prompt 2 on board diagnostics tests 12 OpenBoot PROM 177 diagnostics 12 location 178 orientation 180 removing 178 operating system requirements 6 Solaris 6 SunOS 6 optional CD ROM drive connector 74 external cables 190 options external 7 internal 6 SCSI 7 SX graphics 6 output voltage 29 overview system 195 system board 139 troubleshooting 9 P parallel connector 205 pin assignments 206 interface 202 PCB 40 physical memory 35 specifications 191 pin assignments 13W3 connector 215 AUI connector 207 keyboard mouse connector 209 parallel connector 206 SCSI connector 212 serial ports A B connector 210 twisted pair Ethernet 212 port audio 1 POST 11 abbreviated 19 does not test drives 47 error messages 23 error messages typical 23 error free message abbreviated typical 19 modes full diagnostic 17 normal 17 progress message typical 18 tests 20 power cable diskette drive 129 cord 40 DC harness 57 Index 7 harness 58 off 45 on 45 supply 55 captive screws 56 58 chassis mounts 56 connector pin assignments 31 connector pinouts 30 disconnecting 56 98 output voltages 29 removing 57 test 29 sw
26. 20 Service Manual July 1996 Headphone Connector The headphone is connector is for connecting a set of stereophonic headphones to the system for private listening of audio output C FIGURE C 9 Microphone Icon The microphone connector allows connection to the Sun Microphone 11 microphone FIGURE C 10 Audio Line Out Icon The audio line out connector allows connection to a stereophonic amplifier and external loudspeakers FIGURE C 11 Audio Line In Icon The audio line in connector allows connection to external sound sources compact disc player or cassette tape player FIGURE C 12 Audio Line in Icon Appendix C System Board Connector Pinouts 217 218 SPARCstation 20 Service Manual July 1996 APPENDIX D SCSI Addresses This appendix describes the SCSI addresses for the two internal hard disk drives Also described are the SCSI address conventions for optional SCSI peripherals For complete SCSI address information regarding optional SCSI peripherals see the installation manual for the particular SCSI peripheral Note Assign each SCSI device on the SCSI chain a unique SCSI address Disk Drives TABLE D 1 lists SCSI device addresses for the Solaris 1 1 1 Version B operating environment TABLE D 2 lists SCSI device addresses for the Solaris 2 3 and later versions operating environment TABLE D 1 SCSI Addresses Solaris 1 1 1 Version B SunOS 4 1 3_U1 Version B Operating Environment SCSI Device
27. 8 total One for the scalable memory controller SMC One for the MBus to SBus interface MSBI One for each pair of the eight memory SIMMs 4 total One for the SBus to external bus interface SEC One for the SBus to DBRI Interface DBRI One for the SBus to external data interface MACIO One for SBus slots 0 and 1 One for SBus slots 2 and 3 SPARCstation 20 Service Manual July 1996 APPENDIX 6 System Board Connector Pinouts This appendix provides signal descriptions for the SPARCStation 20 system unit back panel connectors TABLE C 1 through TABLE C 8 lists connector pin assignments and signal descriptions An illustration of each connector is also provided Parallel Connector TABLE C 1 lists connector pin assignments and signal descriptions for the parallel connector Parallel Top u0c000000000001 2000000000000 014 30000 0000000001 2000000000000 014 FIGURE C 1 Parallel Connector 205 TABLE 0 1 Parallel Connector Pin Assignments Pin Function 1 0 Level Signal Description 1 DataStrobe I O 24 mA OC Data valid strobe 2 Data Bit 0 1 O 24 mA OC Data Bit 0 3 Data Bit 1 1 O 24 mA OC Data Bit 1 4 Data Bit 2 1 O 24 mA OC Data Bit 2 5 Data Bit 3 1 O 24 mA OC Data Bit 3 6 Data Bit 4 1 O 24 mA OC Data Bit 4 7 Data Bit 5 I O 24 mA OC Data Bit 5 8 Data Bit 6 I O 24 mA OC Data Bit 6 9 Data Bit 7 I O 24 mA OC Data Bit 7 10 Ack I TTL Data acknowledge 11 Busy I TTL Busy 12 PE
28. AVB connector MBus slots NVRAM TOD OpenBoot PROM FIGURE 10 1 System Board System Board FRUs The following are system board FRUs DSIMM VSIMM NVSIMM AVB SBus card MBus module OpenBoot PROM NVRAM TOD Chapter 10 System Board Overview 141 Chapter 11 provides procedures for removing and replacing these components See FIGURE 10 2 Auxiliary video board DSIMM SBus card MBus module Mbus clock speed jumper Serial port jumpers OpenBoot PROM FIGURE 10 2 Exploded View of the System Board 142 SPARCstation 20 Service Manual July 1996 CHAPTER 1 1 System Board and Component Replacement This chapter describes how to remove replace and configure the replacement parts MBus Module The following paragraphs provide procedures for removing and installing a single wide and a double wide MBus module To remove and install a single wide and a double wide MBus module proceed as follows Removing a Single Wide MBus Module Caution Hot surface Avoid contact Surfaces are hot and may cause personal injury if touched 1 Remove power from the system See Removing Power from the System on page 45 2 Remove the cover and attach the wrist strap See Chapter 7 an antistatic wrist strap and use an ESD protected mat Store ESD sensitive Caution Use proper ESD grounding techniques when handling components Wear components in antistatic bags before pla
29. DC Power Connector 73 Securing the Fan Assembly DC Power Connector 74 Fan DC Power Harness 75 Fan DC Power Harness and Cable Restraint 76 Disconnecting the Fan Power Connector from the DC Power Connector 77 Lifting Fan DC Cable from the Cable Trough 78 Disconnecting the Fan Power Connector 79 CD ROM Drive DC Power Connector Location 80 Connecting the Fan DC Power Connector 81 Routing Excess Cables in Cable Trough 82 Fan DC Power Connector 83 SCSI Backplane Sockets and Connectors 85 SCSI Backplane Screws 6 SCSI Backplane Bracket Tabs 7 SPARCstation 20 Service Manual July 1996 GURE 8 29 GURE 8 30 GURE 8 31 GURE 8 32 GURE 8 33 GURE 8 34 GURE 8 35 GURE 8 36 GURE 8 37 GURE 8 38 GURE 8 39 GURE 8 40 GURE 8 41 GURE 8 42 GURE 8 43 GURE 8 44 GURE 8 45 GURE 8 46 GURE 9 1 GURE 9 2 GURE 9 3 GURE 9 4 GURE 9 5 GURE 9 6 GURE 9 7 GURE 9 8 GURE 9 9 GURE 9 10 Internal Cables and DC Power Connector SunCD 2Plus Drive Type Chassis 89 Back Panel SBus Slots and Captive Screws 90 SCSI Backplane SCSI Data and DC Power Connectors 90 Cable Guide Detail 92 Internal Cables and DC Power Connector SunCD 4 Drive Type Chassis 94 Removing the System Board 95 Attaching a Wrist Strap to Back Panel and Removing the Power Supply 98 Internal Cables and DC Power Connector SunCD 2Plus Drive Type Chassis 99 Back Panel SBus Slots and Captive Screws 100 Detail of Cable Guide 1 SCS
30. Desktop SunCD 2Plus Desktop SunCD 4 Disk expansion unit with variety of SCSI disk drive capacities External double speed 644 Mbyte CD ROM drive EXternal quad speed 644 Mbyte CD ROM drive Chapter 1 Product Description 7 8 TABLE 1 3 External SCSI Options Unit Desktop storage module SCSI expansion pedestal Multiple disk pack Description Disk drive 1 3 Gbyte disk drive 5 0 Gbyte disk drive Up to eight SCSI disks CD ROM drive tape drive other non disk units Requires a minimum of two SCSI controllers if all three trays are used No more than seven SCSI devices on each SCSI bus Desktop enclosure containing a disk array of SCSI disk drives SPARCstation 20 Service Manual July 1996 CHAPTER 2 Troubleshooting Overview This chapter describes how to diagnose a problem and execute diagnostic tests Default Boot Mode FIGURE 2 1 is a flow diagram of the default boot mode for OpenBoot PROM Version 2 14 or later The default boot mode initiates the power on self test POST diagnostics if any one of the following conditions exists Keyboard Stop L1 and D keys are pressed and held down diag switch parameter is set to true m Keyboard is disconnected Power on Diag switch true Run abbreviated POST top L 1 Yes b keys Run full POST Diag switch Display banner and run high level tests Display Testing Memory
31. Dual 50 MHz SuperSPARC with SuperCache 501 2780 SM61 60 MHz SuperSPARC with SuperCache 501 2825 SM71 75 MHz SuperSPARC II with SuperCache 501 3001 HS11 100 MHz hyperSPARC 370 1866 HS12 Dual 100 MHz hyperSPARC 370 1867 11521 125 MHz hyperSPARC 370 1865 51151 150 MHz hyperSPARC 370 2162 Power supply 300 1279 644 Mbyte SCSI 2 SunCD 2Plus drive SunCD 2Plus drive type 540 2500 chassis 644 Mbyte SCSI 2 SunCD 4 drive SunCD 4 CD ROM drive type 540 2852 chassis 1 44 Mbyte diskette drive SunCD 2Plus drive type chassis 370 1419 1 44 Mbyte diskette drive slim floppy SunCD 4 CD ROM drive 540 2854 type chassis 535 Mbyte SCSI 2 disk drive w mounting kit 540 2443 1 05 Gbyte SCSI 2 disk drive w mounting kit 540 2560 2 1 Gbyte SCSI 2 disk drive w mounting kit 540 2699 Speaker 370 1579 184 SPARCstation 20 Service Manual July 1996 TABLE 12 1 Replacement Parts List and Part Numbers Replaceable Parts Part Numbers Fan 540 2640 Power harness SunCD 2Plus drive type chassis 530 2066 Power harness SunCD 4 CD ROM drive type chassis 530 2279 Speaker LED cable SunCD 2Plus drive type chassis 530 2080 Speaker LED cable SunCD 4 CD ROM drive type chassis 530 2291 Fan cable 530 2159 SCSI data cable SunCD 2Plus drive type chassis 530 2053 SCSI data cable SunCD 4 CD ROM drive type chassis 530 2278 Diskette drive cable SunCD 2Plus drive type chassis 530 2067 Diskette drive cable SunCD 4 CD R
32. I TTL Paper error 13 Select I TTL Select 14 AutoFeed O 24 mA TTL AutoFeed 15 Error I TTL Error 16 Reset O 24 mA TTL Initialize 17 SlctIn O 24 mA TTL Select in 18 Shield None GND Shield 19 Shield None GND Shield 20 Shield None GND Shield 21 Shield None GND Shield 22 Shield None GND Shield Active low signal 206 SPARCstation 20 Service Manual July 1996 TABLEC 1 Parallel Connector Pin Assignments Continued Pin Function 1 0 Level Signal Description 23 Shield None GND Shield 24 Shield None GND Shield 25 Shield None GND Shield 26 Shield None GND Shield Active low signal AUI Connector The AUI connector is the bottom connector in the stacked pair of 26 pin connectors on the SPARCstation 20 system TABLE C 2 lists connector pin assignments and signal descriptions for the parallel connector 0 0 0 0 00 0 0 0 0 0 10 014 2000000000000 00 000000000 30 014 2000000000000 AUI bottom FIGURE C 2 AUI Connector TABLE 0 2 AUI Connector Pin Assignments Pin Function 1 0 Level Signal Description 1 AUI_DO 0 Analog Data out negative 2 AUI_DI I Analog Data out positive 3 AUL_CI I Analog AUI collision negative 4 12 VDC O DC Power Appendix C System Board Connector Pinouts 207 TABLE 0 2 AUI Connector Pin Assignments Continued Pin Function 1 0 Level Signal Description 5 CoR None GND Not connected 6 7 None GND
33. Not connected 7 0 y None GND Not connected 8 So None GND Not connected 9 Con None GND Not connected 10 IG ts None GND Not connected 11 Toa None GND Not connected 12 Cs None GND Not connected 13 6 None GND Not connected 14 AUI_DO O Analog Data out positive 15 AUI_DI_ I Analog Data out negative 16 AUI_CI I Analog AUI collision positive 17 Ground None GND Ground 18 IG es None GND Not connected 19 Cy x None GND Not connected 20 So None GND Not connected 21 0 None GND Not connected 22 6 None GND Not connected 23 LE y None GND Not connected 24 ee os None GND Not connected 25 5 None GND Not connected 26 Ground None GND Ground 208 SPARCstation 20 Service Manual July 1996 Keyboard and Mouse Connector TABLE C 3 lists connector pin assignments and signal descriptions for the keyboard and mouse connector 00 FIGURE C 3 Keyboard and Mouse Connector TABLE C 3 Keyboard Mouse Connector Pin Assignments Pin Function Level Signal Description 1 Ground O GND Ground 2 Ground 0 GND Ground 3 5 VDC O VCC Power 4 Mouse In I TTL Input from mouse 5 KeyBd Out O TTL Keyboard output 6 KeyBd In I TTL Keyboard input 7 PowerOn I TTL Power on key 8 5VDC O VCC Power Active low signal Appendix C System Board Connector Pinouts 209 Serial Ports A and B Connector TABLE C 4 lists connector pin assignments and signal descriptions for the serial port A and serial port B con
34. SCSI Address Internal disk lower position first internal disk drive 3 Internal disk upper position second internal disk drive 1 External disk drives 0 2 1 219 220 TABLE D 1 SCSI Addresses Solaris 1 1 1 Version B SunOS 4 1 3_U1 Version B Operating Environment Continued SCSI Device SCSI Address External tape drives 4 5 External CD ROM drive 6 Assign the external disk drive to SCSI address 1 only if a single disk drive is installed TABLE D 2 SCSI Addresses Solaris 2 3 SunOS 5 3 Operating Environment and Later Versions SCSI Device SCSI Address Internal disk lower position first internal disk drive 3 Internal disk upper position second internal disk drive 1 External disk drives 0 2 6 External tape drives 0 2 6 External CD ROM drive 0 2 6 Assign the external disk drive to SCSI address 1 only if a single disk drive is installed Note Do not change the physical position of the internal drive Doing so may cause an operating system initialization failure The internal disk drives are assigned an SCSI address number based on the drive bay disk drive position The lower drive bay disk drive position is automatically assigned SCSI address 3 The upper drive bay disk drive position is assigned SCSI address 1 These addresses cannot be changed With the Solaris 2 3 operating environment and later operating environment releases any SCSI device disk tape CD ROM etc may
35. Test MMU Context Register Test The uniprocessor POST tests one MBus module The multiprocessor POST tests all installed MBus modules POST detects only major failures In a fully configured system with two or more processors POST may take several minutes to be completed To view POST progress and error messages connect a terminal to serial port A or use a tip connection to another Workstation See Setting Up a tip Connection If a terminal is not connected to serial port A or a tip connection is not implemented the screen will be blank during the POST diagnostic test mode In this case the keyboard LEDs are used to determine error conditions See Status LEDs and Indicators SPARCstation 20 Service Manual July 1996 Abbreviated Diagnostic Mode POST is executed if the keyboard is disconnected and the diag switch NVRAM parameter is set to false in the OpenBoot PROM During the abbreviated diagnostics no progressive test messages are displayed and are not printed If errors occur during the abbreviated POST error messages are transferred through serial port A and are viewed by connecting a terminal or tip connection If no errors occur a message similar to CODE EXAMPLE 3 2 is displayed through serial port A CODE EXAMPLE 3 2 Typical Abbreviated POST Error Free Message SMCC SPARCstation 10 20 UP MP POST version 3 1 11 19 93 CPU_ 0 TI TMS390255 3 x 1 External cache CPU_ 1 NOT i
36. anda tape must be installed Attach a terminal to the serial port to observe the output Keyboard must be connected Set diag switch to true or set selftest megs to the desired parameter Set the diag switch parameter to true None A cable must be connected to the back panel Ethernet port A cable must be connected between the rear panel AUI Ethernet port and the Ethernet transceiver A cable must be connected between the rear panel TPE port and a TPE hub Cables must be connected to all Ethernet ports being tested Chapter 2 Troubleshooting Overview 3 Type of Test TABLE 2 3 OpenBoot PROM Diagnostic Tests Continued Description Preparation probe scsi probe scsi all power off module info Returns the SCSI device address SCSI devices must be connected to the SCSI internal and external and respective bus SCSI devices must be powered on SCSI targets connected to the built in SCSI port Returns the SCSI device address and SCSI devices must be connected to the SCSI respective SCSI targets connected to bus SCSI device must be powered on all SCSI ports both the built in SCSI port and any additional SCSI host adapter cards Powers off the system Must have a Type 5 keyboard Identifies the installed MBus module None type s and clock speed identifies installed SBus clock speed SunDiag System Exerciser The SunDiag system exerciser is used to test and exercise system resource
37. command is active the quantity of memory being tested is displayed in megabytes and sequentially decrements to zero during the test If the diag switch parameter is set to false the test memory command uses theselftest megs parameter in NVRAM to determine the quantity of memory to test The default setting for the selftest megs parameter is 1 thus testing one megabyte of memory To change the amount of memory to test use the selftest megs parameter and enter the example command where XX is any whole number that does not exceed the actual size of memory in megabytes Appendix E Selected On Board Diagnostics 227 Example ok setenv selftest megs XX power off The power off command turns off the system power A Type 5 keyboard must be attached for this command to work module info The module info command is used to display the installed MBus module type and MBus module and SBus card clock speeds If multiple MBus modules are installed the module info command identifies each module individually CODE EXAMPLE E 9 identifies the module info command output message for a uniprocessor CODE EXAMPLE E 10 identifies the module info command output message for multiprocessor CODE EXAMPLEE 9 Uniprocessor module info Command Output Message ok module info MBus 40 00 MHz SBus 20 00 MHz CPU 0 50 00 MHz SuperSPARC SuperCache CODE EXAMPLE E 10 Multiprocessor module info Command Output Message lt 0 gt o
38. fails to flash after the keyboard Stop L1 and D keys have pressed and held POST failed MBus module 0 or the system board may be defective To further troubleshoot the system board see Caps Lock Key Fails to Flash During the POST on page 32 Observe the keyboard LEDs If a failure occurs during POST an LED may light up TABLE 3 1 in Chapter 3 describes types of problems that occur when an LED on the keyboard lights up Observe serial port A diagnostic information This may provide additional failure information Replace the defective part indicated Caps Lock Key Fails to Flash During the POST If the Caps Lock key fails to flash during the POST Remove optional SBus cards and all NVSIMMs VSIMMs and DSIMMs except 10201 which is required Initiate POST again with only MBus module in slot 0 a DSIMM in slot J0201 the power supply assembly and the keyboard installed Observe serial port A diagnostic information This may provide additional failure information Replace the defective part indicated If POST passes with the optional parts removed install the optional parts one at a time Initiate POST after each optional part is installed observe the diagnostic output on serial port A and the keyboard LEDs SPARCstation 20 Service Manual July 1996 Disk Drive Errors The following procedure verifies the built in SCSI controller TABLE 4 3 lists disk drive error cond
39. handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Caution Avoid damaging the speaker surface use care when working near or handling the speaker Do not touch the speaker diaphragm with tools or fingers Grasp the speaker by the metal edges Slide the spade connectors onto the speaker terminals FIGURE 8 9 Note Connectors and terminals are keyed to ensure proper connection Install the speaker in the opening on the system front Replace the two screws that secure the speaker to the chassis and proceed as follows FIGURE 8 8 SPARCstation 20 Service Manual July 1996 a Align the tabs on the speaker cover with the slots in the chassis b Press the speaker cover against the chassis snap the speaker cover in place 4 Detach the wrist strap and replace the cover See Chapter 7 5 Power on the system See Turning On the Power on page 47 Fan Assembly The proceeding paragraphs provide instructions for removing and installing the fan and the fan DC power harness To remove and install the fan or the fan DC power harness proceed as follows Note If installed the CD ROM drive must be removed before the fan assembly can be removed or installed see Removing a CD ROM Drive on page 123 Removing the Fan 1 Remove power from the system See Removing Power from the Syst
40. may explode if mistreated Do not dispose of the battery in fire Do not disassemble it or attempt to recharge it Required Tools You will need the following tools and equipment Antistatic mat Wrist strap Long needlenose pliers Phillips screwdriver Flat blade screwdriver SIMM installation tool Conductive foam to store chips DIP IC extraction tool Fan installation tool Card extractor AN Electrostatic Discharge ESD Precautions Caution The system chassis power must be set to standby and the AC power cord must remain plugged in to ensure a proper ground To minimize electrostatic discharge observe the following precautions Hold the system board SBus cards MBus modules SIMMs or system components only by the edges 42 SPARCstation 20 Service Manual July 1996 When removing a board card or module from an antistatic bag lay it on an antistatic surface such as a Sun ESD mat an antistatic bag or a disposable antistatic mat Transport boards cards or modules in an antistatic bag Always wear an antistatic wrist strap connected to a metal surface on the chassis when working on system components and parts Do not place the boards cards or modules on an unprotected surface Use a cushioned antistatic mat or antistatic bag Connectors and components have very thin pins that bend easily Do not use an oscilloscope or VOM Volt Ohm meter probe on the comp
41. parallel controllers Appendix Functional Description 197 198 MBus Module The MBus module provides a high speed interface between the processor modules the physical memory and the I O devices The MBus module operates at a clock rate starting at 40 MHz Interface features of the MBus module include Synchronous operation Automatic switching m 64 bit multiplexed address and data m 64 Gbyte physical address space Multiple master Centralized arbitration reset interrupt and clock distribution Overlapped arbitration with parking Shared memory multiprocessor signals and transactions Write invalidate cache coherency protocol In the SPARCstation 20 system the MBus module can automatically switch from a 40 MHz frequency to a 50 MHz frequency depending on the type of MBus module installed Changing jumpers on the system board is not required MBus to SBus Interface The MBus to SBus interface MSBI is located in the MSBI chip The MSBI contains a IOMMU m Base address register IOMMU control register a Arbiter enable register MBus to SBus asynchronous fault status and address registers The IOMMU is used to perform address translations when SBus masters request the SBus Memory Various memory allocations are configured in up to eight SIMM slots Allocations include a combination of DSIMMs VSIMMs and NVSIMMSs TABLE B 1 lists the possible memory allocations using the three SIM
42. placing it on any surface 152 SPARCstation 20 Service Manual July 1996 3 Unlock the retainers at the back edge of the SBus card FIGURE 11 11 SBus card FIGURE 11 11 SBus Card Retainers 4 Remove the screws and washers from the SBus card back plate FIGURE 11 12 Note Save the screws and washers for later use System back panel cutaway Washer 2 Screw 2 4 SBus card back plate FIGURE 11 12 SBus Card Back Plate Screws and Washers Chapter 11 System Board and Component Replacement 3 5 Insert the extractor into the SBus card FIGURE 11 13 or insert two extractors into double wide Sbus card FIGURE 11 14 e gt 5 x lt Lu FIGURE 11 13 Installing the Card Extractor Double wide SBus card se FIGURE 11 14 Removing a Double Wide SBus Card July 1996 SPARCstation 20 Service Manual 154 6 Hold each end of the extractor and pull up slowly until the connector is removed from the slot Note There are single wide and double wide SBus cards FIGURE 11 15 shows a double wide SBus card being removed 7 Remove the card extractor from the SBus card as follows a Bend one leg of the extractor slightly to the outside until the hook clears the hole in the SBus card FIGURE 11 15 b Remove the other side of the extractor which should come out easily without bending 8 Place the SBus card on an antistatic surface FIGURE 11 15 Removing th
43. securing the power supply to the rear panel Power supply screw Lock block screw Corner screw 6 C OOO C O 9000 o o a FIGURE 7 1 Lock Block Screw and Corner Screw 3 Loosen the screw securing the lock block to the cover Remove the lock block and place it aside FIGURE 7 1 49 4 Grasping the rear of the cover lift the cover up and toward the system front When the cover is at a 60 degree angle to the chassis push the cover away from the front panel to free the cover hinge tabs from the chassis slots 5 Put the cover aside FIGURE 7 2 Rear of cover FIGURE 7 2 Removing the Cover Attaching the Wrist Strap To attach the wrist strap handling components When removing components other than the power supply leave the power cord connected to both the system and the wall receptacle When removing the power supply attach the copper end of the wrist strap to the system chassis Store ESD sensitive components in antistatic bags before placing it on any surface Caution Wear an antistatic wrist strap and use an ESD protected mat when 1 Unwrap the first two folds of the wrist strap Wrap the adhesive side firmly around the wrist FIGURE 7 3 2 At the opposite end of the wrist strap peel the liner from the copper foil Attach the copper foil to the power
44. the metal chassis Note Push on the rear edge of the diskette drive chassis only Do not push on exposed disk drive motors or connectors 134 SPARCstation 20 Service Manual July 1996 4 Attach the diskette drive power and data cables to the diskette drive in the following sequence a Connect P4 FIGURE 9 20 Diskette drive power cable P4 FIGURE 9 20 Connecting the Diskette Drive Power Cable Note The top faces up when connected to the drive b Connect the data cable by routing it over the diskette drive FIGURE 9 21 Chapter9 Storage Devices 135 Diskette drive data cable FIGURE 9 21 Connecting the Diskette Drive Data Cable 5 If applicable replace the CD ROM drive see Installing a CD ROM Drive on page 124 or replace the CD ROM drive filler panel as follows a Align the filler panel such that the filler panel base is on top of the diskette drive filler panel FIGURE 9 22 b Verify that the two posts align with the chassis holes c Squeeze the two tabs together and rotate the filler panel inward until the tabs snap into the chassis slots 136 SPARCstation 20 Service Manual July 1996 Post 2 FIGURE 9 22 Installing the CD ROM Drive Filler Panel 6 Detach the wrist strap and replace the cover See Chapter 7 7 Power on the system See Chapter 6 Chapter 9 Storage Devices 137 138 SPARCstation 20 Service Manual July 1996 CHAPTER 10 System Board O
45. 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 in the United States and in other countries Products bearing SPARC trademarks are based upon an architecture developed by Sun Microsystems Inc The OPEN LOOK and Sun Graphical User Interfaces were developed by Sun Microsystems Inc for its users and licensees Sun acknowledges the pioneering efforts of Xerox Corporation in researching and developing the concept of visual or graphical user interfaces for the computer industry Sun holds a nonexclusive license from Xerox to the Xerox Graphical User Interface which license also covers Sun s licensees who implement OPEN LOOK GUIs and otherwise comply with Sun s written license agreements THIS PUBLICATION IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE OR NON INFRINGEMENT Copyright 1997 Sun Microsystems Inc 901 San Antonio Road Palo Alto Californie 94303 4900 U S A Tous droits r serv s Ce produit ou document est prot g par un copyright et distribu avec des licences qui en restreignent l utilisation la copie et la d compilation Aucune partie de ce produit ou de sa documentation associ e ne peut tre reproduite sous aucune forme par quelque
46. wrist strap to the upper edge of the back panel 4 Remove any SBus cards See Removing an SBus Card on page 152 5 Disconnect the diskette data cable optional SCSI data cable DC power connector and the speaker LED cable from the system board FIGURE 8 36 98 SPARCstation 20 Service Manual July 1996 Diskette data cable SCSI data cable DC power connector Metal cable guide 2 Speaker LED pay se cable 1 System board Note Figure illustrates SunCD 2Plus drive type 1 inch drive chassis only FIGURE 8 36 Internal Cables and DC Power Connector SunCD 2Plus Drive Type Chassis 6 Loosen the two captive screws that secure the system board back panel to the chassis FIGURE 8 37 7 Slide the system board back slightly to access the cables 8 Remove the power supply See Removing the Power Supply on page 55 9 Remove the CD ROM drive See Removing a CD ROM Drive on page 123 Chapter 8 Removing and Installing Subassemblies 99 SBus slots 2and3 2 o Caso O L 6 Pp OOOO Captive screw Captive screw FIGURE 8 37 Back Panel SBus Slots and Cap
47. 108 Installing the Diskette Drive Cable SunCD 2Plus Drive Type Chassis 110 Removing the Diskette Drive Cable SunCD 4 Drive Type Chassis 111 Installing the Diskette Drive Cable SunCD 4 Drive Type Chassis 2 Storage Devices 117 Hard Disk Drive 117 Removing 8 Hard Disk Drive 117 Installing a Hard Disk Drive 120 CD ROM Drive 123 Removing 8 CD ROM Drive 123 Installing a CD ROM Drive 124 Diskette Drive 126 Removing a Diskette Drive 127 Installing a Diskette Drive 2 System Board Overview 139 Preventing Damage 139 Handling System Boards and Assemblies 9 System Board Description 140 System Board FRUs 1 SPARCstation 20 Service Manual July 1996 11 System Board and Component Replacement 3 MBus Module 143 Removing a Single Wide MBus Module 143 Installing a Single Wide MBus Module 146 Removing a Double Wide MBus Module 7 Installing a Double Wide MBus Module 9 SBus Card 2 Removing an SBus Card 2 Installing an SBus Card 6 DSIMMs VSIMMs and NVSIMMs 159 DSIMM 159 VSIMM 160 NVSIMM 161 Removing 8 SIMM 161 Installing a SIMM 163 Auxiliary Video Board 168 Removing an AVB 168 Installing an AVB 170 System Board 171 Removing the System Board 171 Jumper Settings 173 Installing the System Board 175 OpenBoot PROM 177 Removing an OpenBoot PROM 178 Installing an OpenBoot PROM 179 NVRAM TOD 180 Removing a NVRAM TOD 180 Contents vii Installing a NVRAM TOD 181 12 Illustrated Parts Breakdown 183 Replacement Parts List 183 Illustrati
48. 20 Service Manual July 1996 D data cable diskette drive 130 DC power connector SunCD 2Plus drive type chassis 89 99 SunCD 4 drive type chassis 94 104 harness 97 default boot mode 9 description functional 195 product 1 system board 140 desktop enclosure disk drive 8 tape 8 detail cable guides 101 diagnostic tools 11 disconnecting DC power connector 172 diskette connector 172 fan DC power connector 68 SCSI connector 172 speaker LED connector 172 disk drive error 33 errors troubleshooting 34 handle 119 jumper settings not required 121 position 118 121 single connector 117 disk expansion unit 7 diskette drive 126 connecting data cable 136 connecting power cable 135 data cable 130 filler panel 128 grommet 128 grommets 128 132 installing 132 134 location 127 power cable 129 power cable P4 134 removing 127 131 setting microswitch 133 setting switch 131 unseating grommets 132 diskette drive cable 107 location 109 plastic tab 109 proper fold 111 pulling through drive bracket opening 110 document organization xix documentation SunVTS 15 double wide MBus module installing 150 removing 147 149 SBus card installing 157 removing 154 DRAM densities 199 drive address 220 bracket 121 positions 220 tape 7 test manually 47 DSIMM 1 159 199 back view 160 164 determining failed 35 front view 159 inserting 167 memory system 200 E electri
49. 3 Major Components of the System Board 188 SPARCstation 20 Service Manual July 1996 External power cable Al 8 Twisted pair Ethernet cable JI i l j Li Video cable Keyboard cable Microphone and cable FIGURE 12 4 Standard External Cables Chapter 12 Illustrated Parts Breakdown 9 A gt 9 IBM parallel printer cable amp DD RAMA Centronics parallel printer cable AB ee S g TASEEN Serial port Y breakout cable SCSI cable PEC 7 ci 1 a Thick Ethernet AUI adapter cable FIGURE 12 5 Optional External Cables 190 SPARCstation 20 Service Manual July 1996 APPENDIX A Product Specifications This appendix provides
50. 46 removing 143 145 SBus card installing 157 software requirements 6 Solaris 1 1 1 Version B 6 2 3 6 spade connectors 66 speaker 65 SPARCstation 20 system 2 basic 6 configurations 6 exploded view 3 multiprocessor 6 Index 9 operating 6 overhead interior view 4 software requirements 6 SX graphics option 6 video SIMMs 6 speaker 1 connectors 66 cover 64 cover detail 65 cover tabs 64 installing 66 removing 64 spade connectors 65 surface 64 66 terminals 65 66 speaker LED cable 63 speaker LED cable detail 61 specifications electrical 17 inch monitor 192 electrical 20 inch monitor 193 electrical system unit 192 environmental 194 physical 191 product 191 standard external cables 189 features 1 standby power switch 45 switch 40 static electricity 159 storage devices 117 subassemblies 2 3 SunCD 2Plus jumper settings 125 rear view 125 SunCD 4 drive jumper settings 125 rear view 125 SunDiag system exerciser 11 14 SunOS 4 13 1 6 5 3 6 SunVTS documentation 15 kernel 15 tty 16 240 SPARCstation 20 Service Manual July 1996 user interface 15 SX graphics option 6 symbols 40 system architecture 195 interior view 3 overview 195 power 45 SCSI options external 7 system board 171 196 block diagram 197 captive screws 172 176 connector pinouts 205 description 140 exploded view 142 FRUs 141 installing 175 jumper settings 174 majo
51. 6 Disconnect the fan DC power connector from the CD ROM drive power connector FIGURE 8 21 Chapter 8 Removing and Installing Subassemblies 77 Fan power Note Cable restraints and SCSI data DO power connector cables are not illustrated Right side FIGURE 8 20 Lifting Fan DC Cable from the Cable Trough 78 SPARCstation 20 Service Manual July 1996 Fan DC power connector CD ROM drive Fan DC power connector power connector Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 21 Disconnecting the Fan Power Connector Installing the Fan DC Power Harness an antistatic wrist strap and use an ESD protected mat Store ESD sensitive Caution Use proper ESD grounding techniques when handling components Wear components in antistatic bags before placing it on any surface 1 Locate the CD ROM drive DC power connector FIGURE 8 22 Chapter 8 Removing and Installing Subassemblies 9 CD ROM drive DC power connector Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 22 CD ROM Drive DC Power Connector Location 2 Connect the fan DC power connector to the CD ROM drive DC power connector FIGURE 8 23 Note Connectors and terminals are keyed to ensure proper connection 3 Place the excess cable into the cable trough along the front of the chassis FIGURE 8 24 Note Be sure an adequate amount of two wire fan DC cable i
52. 9 F 40 C to 65 C Humidity 93 RH at 104 F 40 C Altitude 0 to 40 000feet 0 to 12 km SPARCstation 20 Service Manual July 1996 APPENDIX B Functional Description This chapter describes the system architecture for the SPARCstation 20 See Chapter 1 for illustrations of the back panel System Overview The SPARCstation 20 supports a system board a power supply up to two hard disk drives a SunCD 2Plus or a SunCD 4 drive and a diskette drive A variety of SBus cards and MBus modules can be installed on the system board Memory is installed using DSIMMs A maximum of eight DSIMMs may be installed Available DSIMMs capacities include 16 Mbyte 32 Mbyte and 64 Mbyte Additionally the SPARCstation 20 system supports up to two VSIMMs or one VSIMM and one NVSIMM The VSIMM output is provided through the 13W3 connector that is built into the back panel Optional installation of a second VSIMM is permitted but requires an AVB with a dedicated 13W3 video output Although the second VSIMM with AVB combination provides a second video output for the SPARCstation 20 system it reduces the number of I O connectors from four to three System Architecture The SPARCstation 20 system provides the following SPARC architecture scalable processor architecture Memory management unit MMU a MBus based system processor architecture SBus based system bus architecture 195 The following are located on the
53. Boot 2 x Command Reference Manual Reading Boot Messages After POST completes the system self test a message similar to the following is displayed listing hardware detected in the system SPARCstation 20 Series 2 X ROM Rev ory MB Memory installed Serial Ethernet address fe ee ee Host ID Turning On the Power 1 Turn on the power as follows a External SCSI peripheral with the SCSI terminator attached b External SCSI peripheral daisy chained to the SCSI peripheral with the SCSI terminator attached Chapter6 Power On and Off 47 c SCSI peripherals ending with the SCSI peripheral directly connected to the computer system d Monitor e Power on Standby switch on the system back panel FIGURE 6 2 2 The operating system should load or the ok prompt should appear on the monitor 6099900 C O gt Cc 70000 Power FIGURE 6 2 Power On Switch 48 SPARCstation 20 Service Manual July 1996 CHAPTER 7 Internal Access This chapter explains how to remove the cover attach the wrist strap and replace the cover Removing the Cover To remove the cover 1 Remove power from the system See Removing Power from the System on page 45 2 Loosen the screw on the corner of the back panel FIGURE 7 1 Note Do not loosen the screw
54. CDROMs are not tested by test a11 Tests are executed in the device tree the device tree may be viewed with the show devs command To execute the test all program type the test all command CODE EXAMPLE E 2 test all Command Output Message ok test all SPARCstation 20 Service Manual July 1996 watch clock watch clock reads a register in the NVRAM TOD chip and displays the result as a seconds counter During normal operation the seconds counter repeatedly increments from 0 to 59 until interrupted by pressing any key on the keyboard CODE EXAMPLE E 3 identifies the wat ch clock command output message CODE EXAMPLE E 3 watch clock Command Output Message ok watch clock Watching the seconds register of the real time clock chip It should be ticking once a second Type any key to stop 41 Appendix E Selected On Board Diagnostics 223 224 watch net waten aui watch tpe watch net all The watch net watch aui watch tpe and watch net all commands monitor broadcast Ethernet packets on the Ethernet cable s connected to the system Good packets received by the system are displayed by a period Erroneous packets received by the system are indicated with an X and the error description CODE EXAMPLE E 4 identifies the wat ch net command output message CODE EXAMPLE E 4 watch net Command Output Message ok watch net Internal loopback test succeeded External loopback test Auto se
55. DC power connector SCSI data cable a Diskette data cable optional Detach the wrist strap and replace the cover See Chapter 7 Power on the system See Turning On the Power on page 47 Removing the SCSI Data Cable SunCD 4 Drive Type Chassis Remove power from the system See Removing Power from the System on page 45 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Disconnect the following from the system board FIGURE 8 33 DC power cable SCSI data cable Diskette data cable Speaker LED cable Chapter 8 Removing and Installing Subassemblies 93 Cable clip 2 chassis floor Sb H Speaker LED located on IAN ii ee cable PA DC power harness Cable clip 3 SCSI data located on cable chassis wall SCSI backplane Cd Diskette data Es TT connector L M Card guide pem cable clip 2 E connector s s DC power connector g Speaker LED connector L L Note Figure illustrates SunCD 4 drive type 1 6 inch drive chassis only FIGURE 8 33 Internal Cables and DC Po
56. Do not touch the speaker diaphragm with tools or fingers Grasp the speaker by the metal edges Remove the triangular shaped speaker cover from the unit front as follows Note The speaker cover is secured by three tabs one tab is on the cover top and two tabs are on the cover bottom see FIGURE 8 8 a Insert the tip of a small flat blade screwdriver between the speaker cover and the chassis Press the top cover tab outward slightly to release it from the chassis slot 64 SPARCstation 20 Service Manual July 1996 b Insert the screwdriver tip in one of the slots on the bottom of the speaker cover and press the lower cover tab up to release it from the chassis slot Repeat this step to release the second lower cover tab 4 Remove the two screws that secure the speaker to the chassis Set the screws aside FIGURE 8 8 Top cover tab Speaker cover a Screw 2 y FIGURE 8 8 Speaker Cover Detail 5 Grasp the metal speaker rim and lift the speaker slightly to free it from the chassis 6 Grasping the speaker in one hand disconnect the spade connectors from the speaker terminals on the back of the speaker FIGURE 8 9 Chapter 8 Removing and Installing Subassemblies 65 66 Back of speaker N 0 0 0 8 0 Small spade 0 connector N O X Large spade connector FIGURE 8 9 Speaker Connectors Installing the Speaker Caution Use proper ESD grounding techniques when
57. Each SIMM card has horizontally mounted intergrated circuits ICs on both sides of the card The part of the card that plugs into the memory slot has a scalloped edge with a conductive surface that is known as gold fingers Removing and installing all capacities and types of SIMMs DSIMM VSIMM NVSIMM is identical The following sections provide a brief discussion of DSIMMs VSIMMs and NVSIMMs and is followed by procedures for removing and installing a SIMM Caution A SIMM is made of delicate electronic components that are extremely sensitive to static electricity Handle a SIMM only by the edges Ordinary amounts of static from clothes or work environment can damage a SIMM Do not touch the components on a SIMM or any metal parts Wear a grounding strap before unpacking a SIMM and while handling a SIMM DSIMM FIGURE 11 20 and FIGURE 11 21 show front and back views respectively of a DSIMM When installed the key notch should be near the DSIMM ejector levers Key notch m 0 pannan annann FIGURE 11 20 DSIMM Front View Chapter 11 System Board and Component Replacement 9 Key notch j 2 an FIGURE 11 21 DSIMM Back View VSIMM SPARCstation 20 systems with the SX graphics option are equipped with a minimum of 4 Mbytes of video random access memor
58. I Backplane SCSI Data and DC Power Connectors 102 Internal Cables and DC Power Connector SunCD 4 Drive Type Chassis 104 Back Panel Captive Screws 104 Removing the System Board 105 Diskette Drive Cable Location 109 Diskette Drive Cable Plastic Tab 109 Pulling the Diskette Drive Cable Through the Drive Bracket Opening 110 System Board Cable Routing SunCD 4 Drive Type Chassis 112 Location of Hard Disk Drives 8 Single Connector Hard Disk Drive 9 Removing a Hard Disk Drive 120 Installing a Hard Disk Drive 2 Removing the CD ROM Drive 124 SunCD 2Plus Rear View and Jumper Settings 5 SunCD 4 Drive Rear View and Jumper Settings 5 Installing a CD ROM Drive 126 Diskette Drive Location 127 CD ROM Drive Filler Panel 128 Figures xiii FIGURE 9 11 FIGURE 9 12 FIGURE 9 13 FIGURE 9 14 FIGURE 9 15 FIGURE 9 16 FIGURE 9 17 FIGURE 9 18 FIGURE 9 19 FIGURE 9 20 FIGURE 9 21 FIGURE 9 22 FIGURE 10 1 FIGURE 10 2 FIGURE 11 1 FIGURE 11 2 FIGURE 11 3 FIGURE 11 4 FIGURE 11 5 FIGURE 11 6 FIGURE 11 7 FIGURE 11 8 FIGURE 11 9 FIGURE 11 10 n GURE 11 11 GURE 11 12 FIGURE 11 13 GURE 11 14 Diskette Drive Power Cable 129 Diskette Drive Data Cable 130 Removing the Diskette Drive 1 Installing Grommets and Setting the Diskette Drive Switch 1 Unseating the Diskette Drive Grommets 2 Setting the Diskette Drive Microswitch 133 Moving the SCSI Disk Cable and the CD
59. M types SPARCstation 20 Service Manual July 1996 The following sections provide brief descriptions of DSIMMs VSIMMs and NVSIMMs and identifies the maximum available memory capacities based on possible memory allocations TABLE 8 1 Memory Allocations Memory DSIMM VSIMM NVSIMM Allocation max 0 0 7 1 0 7 0 1 max 6 2 max 0 6 1 1 DSIMM The SPARCstation 20 memory system has a 144 bit wide data path The 144 bit wide path is divided into a 128 bit wide data path and 16 bits of error correcting code ECC Through the Scalable Memory Controller SMC the 60 nanosecond DSIMMs receive control address information and data The maximum available DSIMM memory capacities based upon possible memory allocations are as follows Eight DSIMMs zero VSIMMs zero DVSIMMS 8 64 Mbytes or 512 Mbytes Seven DSIMMS with one VSIMM or one DVSIMM 7 x 64 Mbytes or 448 Mbytes Six DSIMMS with two VSIMMs or one VSIMM and one DVSIMM 6 x 64 Mbytes or 384 Mbytes TABLE B 2 lists the DSIMM DRAM densities supported by the SMC FIGURE B 2 illustrates the DSIMM memory system TABLE 2 DSIMM DRAM Densities RAM Density Number of RAMs Capacity Type 4 Mbit 1Mx4 36 16 Mbytes ECC DRAM 8 Mbit 2M x 4 36 32 Mbytes ECC DRAM 16 Mbit 4M x 4 36 64 Mbytes ECC DRAM Appendix Functional Description 199 DATA 144 ADDR 12 SIMM slot 8 SMC CONTROL DSIMM DSIMM
60. MM 159 160 201 back view 161 165 front view 160 inserting 167 memory system 201 WwW warnings xx watch aui 13 clock 13 net 13 net all 13 tpe 13 watch aui 224 watch clock 223 watch clock command output message 223 watch net 224 watch net command output message 224 watch net all 224 watch net all command output message 226 watch tpe 224 watch tpe command output message 225 wrist strap 40 Index 241 wrist strap attaching 50 242 SPARCstation 20 Service Manual July 1996
61. OM drive type chassis 530 2277 AUI adapter cable 530 2021 Serial port splitter cable 530 1869 IBM parallel port adapter cable 530 1861 Centronics parallel port adapter cable 530 1857 Illustration of Selected FRUs FIGURE 12 1 shows a top view of selected FRUs FIGURE 12 2 shows an exploded view of the SPARCstation 20 system FIGURE 12 3 shows the major components of the system board FIGURE 12 4 shows standard external cables and FIGURE 12 5 shows optional external cables Chapter 12 Illustrated Parts Breakdown 185 CD ROM drive top NVSIMM VSIMM module slots Power supply MBus module slots Diskette drive bottom Hard disk drive 2 stacked DSIMM module slots SBus card slots AVB slot System board NVRAM TOD OpenBoot PROM FIGURE 12 1 Selected FRUs 186 SPARCstation 20 Service Manual July 1996 CD ROM drive DC power harness SCSI data cable Diskette drive Speaker LED Diskette cable Disk drive 2 External power cord FIGURE 12 2 SPARCstation 20 System Exploded View Chapter 12 Illustrated Parts Breakdown 7 AVB SBus card I I MBus module DSIMM module N N VSIMM or l f NVSIMM module AY Clock speed A jumper i X a Al WS 1 v Serial port NVRAM TOD jumpers OpenBoot PROM Note NVRAM TOD carrier not illustrated FIGURE 12
62. RE 11 27 DSIMM Back View If installing a VSIMM position the VSIMM with the plastic cover facing the system unit front panel The notched portion of the VSIMM should be near the center of the system board FIGURE 11 28 SPARCstation 20 Service Manual July 1996 Plastic cover O 3 1 a PN Notch location FIGURE 11 28 VSIMM Back View Caution Once the battery is turned on do not move or remove the jumper Any data in the NVSIMM memory will be lost if the jumper is moved 6 If installing an NVSIMM proceed as follows FIGURE 11 29 a Turn on the battery b Locate the jumper on the battery side of the NVSIMM c Move the jumper to the battery On position Battery FIGURE 11 29 NVSIMM Battery Side Chapter 11 System Board and Component Replacement 165 7 Hold the NVSIMM by the edges and align the notch with the area between the two SIMM slots The surface with the battery must face the system unit back panel FIGURE 11 30 Z Vy Ejection lever noo
63. ROM drive DC power connector and a power connector for the optional CD ROM drive connector FIGURE 8 17 SPARCstation 20 Service Manual July 1996 Fan DC power connector CD ROM drive DC power connector CD ROM drive connector optional FIGURE 8 17 Fan DC Power Harness 1 Remove power from the system See Removing Power from the System on page 45 2 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 3 Detach the fan DC power harness from under the cable restraint near the CD ROM drive data cable FIGURE 8 18 Chapter 8 Removing and Installing Subassemblies 75 Fan DC power harness Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 18 Fan DC Power Harness and Cable Restraint 4 Disconnect the fan power connector from the DC power connector FIGURE 8 19 76 SPARCstation 20 Service Manual July 1996 Fan assembly Fan power connector DC power connector Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 19 Disconnecting the Fan Power Connector from the DC Power Connector 5 Lift the excess fan DC cable from the cable trough along the front of the chassis remove the fan DC power harness FIGURE 8 20
64. ROM Drive Power Cable 3 Diskette Drive Power Cable P4 134 Installing the Diskette Drive 4 Connecting the Diskette Drive Power Cable 5 Connecting the Diskette Drive Data Cable 6 Installing the CD ROM Drive Filler Panel 7 System Board 141 Exploded View of the System Board 142 MBus Module Retainers 144 Extractor Installation on a Single Wide MBus Module 5 Removing a Single Wide MBus Module 5 Installing a Single Wide MBus Module 6 MBus Module and SBus Card Retainers 147 MBus Module Back Panel Screws and Washers 8 Removing a Double Wide MBus Module 149 Installing a Double Wide MBus Module 0 Seating a Double Wide MBus Module back Plate Side View 151 Locking the MBus Module Retainers 2 SBus Card Retainers 153 SBus Card Back Plate Screws and Washers 3 Installing the Card Extractor 154 Removing a Double Wide SBus Card 154 xiv SPARCstation 20 Service Manual July 1996 GURE 11 15 GURE 11 16 GURE 11 17 GURE 11 18 GURE 11 19 GURE 11 20 GURE 11 21 GURE 11 22 GURE 11 23 GURE 11 24 GURE 11 25 GURE 11 26 GURE 11 27 GURE 11 28 GURE 11 29 GURE 11 30 GURE 11 31 GURE 11 32 GURE 11 33 GURE 11 34 GURE 11 35 GURE 11 36 GURE 11 37 GURE 11 38 GURE 11 39 GURE 11 40 GURE 11 41 GURE 11 42 Removing the SBus Card Extractor 155 Removing the SBus Card Adapter Bracket 156 Installing a Double Wide SBus Card 157 Installing a Single Wide SBus Card 7 SBus Card Back Panel Scre
65. SI data cable P1 connector is connected to the SCSI backplane with the tape aligned between the card guide plastic cable clips see FIGURE 8 38 The SCSI data cable P3 connector is connected to the system board and threaded through the chassis wall metal cable guides The SCSI data cable P2 connector is routed through the gap between the hard disk drive and the chassis wall P2 connects to the SunCD 4 drive if installed or is secured under the chassis floor metal cable clips Secure the SCSI data cable under the plastic card guide cable clips Note The taped portion of the SCSI data cable should be positioned directly between the plastic card guide cable clips as shown in FIGURE 8 38 Connect the SCSI data cable to the SCSI backplane Connect the DC power harness to the SCSI backplane Insert the front edge of the system board into the card guide Lift the rear of the board slightly and slide it along the card guide until it is fully inserted FIGURE 8 30 Connect the DC power cable SCSI data cable diskette data cable and speaker LED cable to the system board Note Thread the SCSI data cable through the chassis wall metal cable clips after the SCSI data cable is connected to the system board FIGURE 8 33 Replace the SBus card See Installing an SBus Card on page 156 Tighten the two captive Phillips head screws that secure the system board to the chassis rear FIGURE 8 30 SPARCs
66. SI host adapter card to the fast SCSI devices and put these fast SCSI devices on a separate SCSI bus to accelerate disk drive response SPARCstation 20 Service Manual July 1996 VSIMM or NVSIMM Slot Location SIMM Errors If the operating system diagnostic program or POST does not display a SIMM location J number as part of the memory error message and the only available information is a physical memory address use TABLE 4 4 to locate the failing SIMM TABLE 4 4 SIMM Slots and Physical Address VSIMMO J0407 VSIMM1 or NVSIMM J0406 DSIMM Slot Physical Memory Physical Memory Location Address Start Address End 10201 bank 0 0000 0000 16 O3ff ffff 16 10202 bank 2 0800 0000 16 Obff ffff 16 10203 bank 5 1400 0000 16 17ff ffff 16 10301 bank 3 0600 0000 16 Offf ffff 16 10302 bank 6 1800 0000 16 10 ffff 16 10303 bank 1 0400 0000 16 O7ff ffff 16 10304 bank 7 1c00 0000 16 1fff ffff 16 10305 bank 4 1000 0000 16 13ff ffff 16 FIGURE 4 3 shows the SIMM locations in the system Note The banks listed in TABLE 4 4 do not correspond to the physical order of the DSIMM slots on the system board The physical order of the slots is based upon an alternating bank pattern bank 0 bank 2 bank 5 bank 3 bank 6 bank 1 bank 7 and bank 4 Each bank allows enough address space to accommodate a 64 Mbyte DSIMM If a 16 Mbyte or 32 Mbyte DSIMM is installed in a bank the unused a
67. SPARCstation 20 Service Manual Sun microsystems THE NETWORK IS THE COMPUTER Sun Microsystems Computer Company A Sun Microsystems Inc Business 901 San Antonio Road Palo Alto CA 94303 4900 USA 650 960 1300 fax 650 969 9131 Part No 801 6189 12 Revision A July 1996 Send comments about this document to docfeedback sun com 1997 Sun Microsystems Inc 901 San Antonio Road Palo Alto California 94303 4900 U S A All rights reserved This product or document is protected by copyright and distributed under licenses restricting its use copying distribution and decompilation No part of this product or document may be reproduced in any form by any means without prior written authorization of Sun and its licensors if any Portions of this product may be derived from the UNIX system licensed from Novell Inc and from the Berkeley 4 3 BSD system licensed from the University of California UNIX is a registered trademark in the United States and in other countries and is exclusively licensed by X Open Company Ltd Third party software including font technology in this product is protected by copyright and licensed from Sun s suppliers RESTRICTED RIGHTS Use duplication or disclosure by the U S Government is subject to restrictions of FAR 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
68. SPARCstation 20 Service Manual July 1996 Route the diskette drive cable in the system chassis Note The diskette drive cable should pass under the first metal cable clip in the chassis floor Connect the diskette drive cable to the system board FIGURE 8 46 Install the diskette drive See Installing a Diskette Drive on page 132 Install the CD ROM drive See Installing a CD ROM Drive on page 124 Detach the wrist strap and replace the cover See Chapter 7 Power on the system See Turning On the Power on page 47 Chapter 8 Removing and Installing Subassemblies 3 114 SPARCstation 20 Service Manual July 1996 Chapter 8 Removing and Installing Subassemblies 5 116 SPARCstation 20 Service Manual July 1996 CHAPTER 9 Storage Devices This chapter contains procedures for removing and installing storage devices The following is the list of storage devices Hard Disk Drive The SPARCstation 20 system uses 535 Mbyte 1 05 Gbyte and 2 0 Gbyte single connector hard disk drives Each disk drive connects to the SCSI backplane A handle on each single connector drive helps to install the hard disk drive into the SCSI backplane socket To remove and install a hard disk drive proceed as follows Note Do not remove the handle from the hard disk drive it is part of the field replaceable unit FRU Removing a Hard Disk Drive 1 Remove power from the system See
69. Subassemblies Boards and Components The SPARCstation 20 system contains the following subassemblies boards and components see FIGURE 1 2 System board SIMMs DSIMMs eight maximum VSIMMs two maximum Non volatile SIMM NVSIMM one SBus card four maximum MBus module two maximum Hard disk drive 3 5 inch 88 0 mm single connector two maximum SunCD 2Plus drive or SunCD 4 drive optional Diskette drive 3 5 inch optional Power supply 150 watt two fan SPARCstation 20 Service Manual July 1996 CD ROM drive SunCD 2Plus or SunCD 4 DC power harness FIGURE 1 2 SPARCstation 20 System Exploded View Interior View FIGURE 1 3 shows an interior view of the major subassemblies and the system board Chapter 1 Product Description 3 4 CD ROM drive i i Di kette arive Hard disk drive s top unit bottom unit T J MBus DSIMMs co 1 VSIMMs NVSIMM Power supply 1 System board J SBus NVRAM TOD OpenBoot PROM FIGURE 1 3 SPARCstation 20 System Overhead Interior View Rear View FIGURE 1 4 shows a rear view of the system Appendix C provides additional information The appendix describes each connector on the back panel lists pin assignments signal descriptions and shows detailed connector illustrations
70. System on page 45 2 Remove the cover and attach the wrist strap See Chapter 7 an antistatic wrist strap and use an ESD protected mat Store ESD sensitive Caution Use proper ESD grounding techniques when handling components Wear components in antistatic bags before placing it on any surface 180 SPARCstation 20 Service Manual July 1996 3 Remove any SBus cards See Removing an SBus Card on page 152 4 Locate the NVRAM TOD chip on the system board FIGURE 11 45 NVRAM TOD socket FIGURE 11 45 NVRAM TOD Location 5 Grasp the NVRAM TOD by the tabs on the NVRAM TOD carrier and pull up on the carrier to extract the NVRAM TOD 6 Place the NVRAM TOD on an antistatic surface Installing a NVRAM TOD Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 1 Locate the NVRAM TOD socket on the system board FIGURE 11 46 Chapter 11 System Board and Component Replacement 1 2 Insert the NVRAM TOD into the carrier Insert the NVRAM TOD carrier into the socket ensuring that the notches on the socket and the carrier are aligned properly FIGURE 11 46 NVRAM notch Socket notch Note NVRAM TOD carrier not illustrated FIGURE 11 46 N
71. VRAM TOD Orientation 3 Push the NVRAM TOD carrier into the socket Note Press down firmly until the pins are seated in the socket 4 Replace any SBus cards removed earlier See Installing an SBus Card on page 156 5 Detach the wrist strap and replace the cover See Chapter 7 6 Power on the system See Chapter 6 182 SPARCstation 20 Service Manual July 1996 CHAPTER 12 Illustrated Parts Breakdown This chapter lists the authorized replaceable parts for the SPARCstation 20 system Note The listed part numbers are correct as of the service manual publication date but are subject to change without notice Consult your authorized Sun sales representative or service provider to confirm a part number prior to ordering a replacement part Replacement Parts List The following table lists the FRUs and associated part numbers TABLE 12 1 Replacement Parts List and Part Numbers Replaceable Parts Part Numbers System board 0 Mbytes 0 CPU 501 2924 SCSI backplane 501 2462 OpenBoot PROM 525 1377 NVRAM TOD chip 525 1378 NVSIMM 2 Mbyte 501 2001 VSIMM 4 Mbyte 501 2481 VSIMM 8 Mbyte 501 2482 183 TABLE 12 1 Replacement Parts List and Part Numbers Replaceable Parts Part Numbers DSIMM 16 Mbyte 501 2479 DSIMM 32 Mbyte 501 2622 DSIMM 64 Mbyte 501 2480 Auxiliary video board 501 2488 SM50 50 MHz SuperSPARC 501 2708 SM51 50 MHz SuperSPARC with SuperCache 501 2754 SM52
72. ace the drive on an antistatic surface Repeat Step 4 through Step 7 to remove the bottom disk drive if installed Chapter9 Storage Devices 119 FIGURE 9 3 Removing a Hard Disk Drive Installing a Hard Disk Drive an antistatic wrist strap and use an ESD protected mat Store ESD sensitive Caution Use proper ESD grounding techniques when handling components Wear components in antistatic bags before placing it on any surface 120 SPARCstation 20 Service Manual July 1996 Note The disk drive position determines the assigned SCSI address When installed the bottom disk drive is assigned SCSI address 3 and the top disk drive is assigned SCSI address 1 Note No jumper settings are required for the hard disk drives Position the hard disk drive as follows FIGURE 9 4 a Release the handle latch near the rear of the drive and lift the handle to the vertical position b While grasping the drive handle with one hand use the other hand to hold the drive steady carefully lower the drive into the chassis Note Ensure that the drive is properly seated in the mounting slots of the drive bracket and that the SCSI connector on the hard drive is pointed toward the SCSI backplane c Push the drive handle down away from the connector until the handle locks into the latch Note When lowered the drive handle acts as a mechanism to engage the drive connector with the SCSI backplane socket
73. anel Captive Screws 104 SPARCstation 20 Service Manual July 1996 5 Pull the system board from the chassis back until the system board clears the plastic card guide FIGURE 8 42 Card guide FIGURE 8 42 Removing the System Board Caution Place the system board on an antistatic surface 6 Remove the SunCD 4 drive See Removing a CD ROM Drive on page 123 7 Disconnect the DC power harness from the diskette drive 8 Remove the DC power harness from the SCSI backplane as follows FIGURE 8 26 a Free the SCSI data cable from the metal cable clips on the chassis wall and from the card guide plastic cable clips b Disconnect the SCSI data cable from the SCSI backplane Chapter 8 Removing and Installing Subassemblies 5 106 9 10 c Remove the DC power harness labeled P3 from the card guide clips and disconnect the DC power harness from the SCSI backplane Remove the power supply See Removing the Power Supply on page 55 Disconnect the DC power harness labeled P1 from the power supply and carefully remove the harness from the system chassis Installing the DC Power Harness SunCD 4 Drive Type Chassis Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Note Visual markers are placed on the DC power h
74. arnesses to aid cable alignment When properly installed the two colored tape marks on the P1 power supply harness should straddle the chassis wall metal cable clips that are nearest to the system board The P2 CD ROM drive harness should lie under the second chassis floor metal cable clip The second colored tape mark farthermost from the P3 connector of the P3 SCSI backplane harness should be centered under the second plastic cable guide clip The P4 diskette drive harness should be threaded through the chassis wall with the diskette data cable and located under the first metal chassis floor cable clip Place the power supply harness SCSI backplane DC power harness diskette drive DC power harness CD ROM DC power harness and SCSI data cable as follows FIGURE 8 29 a Route the power supply harness labeled P1 through the metal cable clips on the chassis wall Note The two colored tape marks on the DC power harness should straddle the cable clips b Route the SCSI backplane DC power harness labeled P3 under the plastic cable clips on the card guide to the SCSI backplane c Thread the diskette drive DC power harness labeled P4 through the hole in the chassis wall with the diskette data cable SPARCstation 20 Service Manual July 1996 10 d Locate the CD ROM DC power harness labeled P2 under the second metal cable clip on the chassis floor e Route the SCSI data cable labeled P1 between the pl
75. assembly power connector to the two pin fan DC power connector FIGURE 8 15 Note Connectors and terminals are keyed to ensure proper connection 5 Secure the fan DC harness beneath the cable restraint FIGURE 8 15 Note Store any excess cabling under the cable restraint 6 If a CD ROM drive was removed install it now See Installing a CD ROM Drive on page 124 72 SPARCstation 20 Service Manual July 1996 7 Detach the wrist strap and replace the cover See Chapter 7 8 Power on the system See Section Turning On the Power on page 6 47 Fan connector DC power connector Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 15 Connecting the Fan Assembly DC Power Connector Chapter 8 Removing and Installing Subassemblies 3 Note Cable restraints and SCSI data 74 Fan DC harness cables are not illustrated FIGURE 8 16 Securing the Fan Assembly DC Power Connector Removing the Fan DC Power Harness Note Some units have built in fan DC power cables in the system DC power harness and the separate fan DC harness is not used For systems having the fan DC connector built into the system DC power harness see DC Power Harness on page 97 If the system has a separate fan DC power harness the fan DC power harness must be removed from the CD ROM drive DC power connector The separate fan DC power harness has a two wire fan DC power connector a CD
76. astic clips at the rear of the card guide Connect SCSI data cable to the SCSI backplane f Connect the DC power harness labeled P3 to the SCSI backplane g Connect the DC power harness labeled P1 to the rear of the power supply Install the power supply See Installing the Power Supply on page 58 Connect the DC power harness labeled P4 to the diskette drive Insert the front edge of the system board into the card guide then lift the rear of the board slightly and slide it along the card guide until it is fully inserted FIGURE 8 34 Connect the DC power cable diskette data cable SCSI data cable and speaker LED cable to the system board FIGURE 8 40 Note Thread the SCSI data cable through the metal cable clips on the chassis wall after it is connected to the system board Install the SBus card See Installing an SBus Card on page 156 Tighten the two captive Phillips head screws that secure the system board to the chassis rear FIGURE 8 34 Install the CD ROM drive See Installing a CD ROM Drive on page 124 Detach the wrist strap and replace the cover See Chapter 7 Power on the system See Turning On the Power on page 47 Diskette Drive Cable The SPARCstation 20 system is configured with one of two chassis types Chapter 8 Removing and Installing Subassemblies 107 108 A chassis that supports the SunCD 2Plus drive 1 inch driv
77. aussi les licenci s de Sun qui mettent en place les utilisateurs d interfaces graphiques OPEN LOOK et qui en outre se conforment aux licences crites de Sun CETTE PUBLICATION EST FOURNIE EN L ETAT SANS GARANTIE D AUCUNE SORTE NI EXPRESSE NI IMPLICITE Y COMPRIS ET SANS QUE CETTE LISTE NE SOIT LIMITATIVE DES GARANTIES CONCERNANT LA VALEUR MARCHANDE L APTITUDE DES PRODUITS A REPONDRE A UNE UTILISATION PARTICULIERE OU LE FAIT QU ILS NE SOIENT PAS CONTREFAISANTS DE PRODUITS DE TIERS co Ca Adobe PostScript Contents Product Description 1 Standard Features 1 Subassemblies Boards and Components 2 Interior View 3 Rear View 4 Software Requirements 6 Internal Options 6 External Options 7 Troubleshooting Overview 9 Default Boot Mode 9 Diagnostic Tools 11 OpenBoot PROM Diagnostics 12 SunDiag System Exerciser 14 Sun VTS 15 Power On Self Test POST 17 Normal Mode 7 Full Diagnostic Mode 17 Abbreviated Diagnostic Mode 19 Contents iii Setting Up a tip Connection 19 POST Tests 20 POST Error Messages 23 Status LEDs and Indicators 3 Completing POST 25 4 Troubleshooting Procedures 27 Video Output Failure 8 Power On Does Not Succeed 29 Power Supply Test 9 System Board Test 31 Caps Lock Key Fails to Flash During the POST 2 Disk Drive Errors 33 SIMM Errors 35 5 Safety and Tools Requirements 39 Safety Requirements 39 Symbols 40 System Precautions 41 Lithium Battery 42 Required Tools 2 Electrostatic Dischar
78. be assigned any SCSI address from 0 to 6 Note SCSI address 7 is reserved for the SCSI processor of the computer system or the SCSI host adapter card SPARCstation 20 Service Manual July 1996 APPENDIX E Selected On Board Diagnostics This appendix describes the OpenBoot PROM on board diagnostics To execute the on board diagnostics the system must be at the ok prompt Caution To execute the OpenBoot PROM on board diagnostics from the ok prompt the system must be shut down in an orderly manner When the operating system or any other stand alone application is booted do not use the keyboard Stop L1 and a keys to halt the system Abruptly aborting the operating system may cause damage to data files test device alias test device pathname The test command combined with a device alias or device path name initializes the self test program for that device 221 222 To execute the self test program for a device type the test command followed by the device alias or device pathname If a device has no self test program the following is displayed No selftest method for device name CODE EXAMPLE E 1 identifies the test output message CODE EXAMPLE E 1 test Command Output Message ok test floppy Testing floppy disk system A formatted disk should be in the drive Test succeeded test all The 665 811 command tests all devices in the system that have a self test program Disks tapes and
79. c wriststrap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Individuals who service this equipment must observe all safety precautions and ensure compliance with skill level requirements certification and all applicable local and national laws Procedures in this document must be performed by trained maintenance providers Only people who have been trained by the Sun MicrosystemsTM training facilities or by Sun Microsystems affiliates and have been certified as required by local and national laws are considered qualified Note Prior to performing service or repair carefully read the associated procedure If a similar repair has not been performed on comparable equipment do not attempt to perform the procedure Preface xxi Typographic Conventions The following table lists typographic conventions used within this service manual TABLE P 2 Typographic Conventions Typeface or Symbol AaBbCc123 AaBbCc123 AaBbCc123 AaBbCc123 Meaning The names of commands files and directories on screen computer output What you type contrasted with on screen computer output Command line placeholder replace with a real name or value Book titles new words or terms or words to be emphasized Example Edit your login file Use ls a to list all files machine_name S You have mail machine_name S suPassword To delete a file t
80. cal specifications 17 inch monitor 192 electrical specifications 20 inch monitor 193 electrical specifications system unit 192 electricity static 159 electrostatic discharge 42 ESD 40 environmental specifications 194 error disk drive 33 messages POST 23 parity 28 34 read 28 34 write 28 34 ESD 40 Ethernet interface 202 expansion unit disk 7 exploded view SPARCstation 20 system 3 187 system board 142 external cables optional 190 standard 189 options 7 F fan assembly 70 clip 68 70 connector 67 72 DC power 67 68 70 74 connector 72 harness 67 74 76 housing 67 installation tool 71 mounting clip 70 removing 69 features standard 1 floppy disk drive switch setting 132 functional block diagram MACIO ASIC 203 SEC ASIC 204 description 195 G grommet diskette drive 128 H handle disk drive 119 latch 119 121 hard disk drive 117 installing 120 122 removing 117 120 single connector 119 harness fan 74 headphone connector 217 Index 235 heat sinks 40 illustrated parts breakdown 183 in line connector LED 61 inserting DSIMM 167 NVSIMM 167 VSIMM 167 install SIMMs 35 installing AVB 170 card extractor 154 CD ROM drive 124 126 filler panel 137 DC power harness SunCD 2Plus drive type chassis 102 SunCD 4 drive type chassis 106 diskette data cable SunCD 4 drive type chassis 112 diskette drive 132 134 diskette drive cable
81. cing it on any surface 143 144 3 Unlock both MBus module retainers FIGURE 11 1 MBus module single wide Retainer 2 FIGURE 11 1 MBus Module Retainers 4 If the system contains two MBus modules slot 1 upper slot 0 lower and the MBus module being removed is in the lower slot slot 0 remove the slot 1 MBus module first 5 Install the card extractor on the MBus module FIGURE 11 2 6 Holding each side of the card extractor pull the MBus module up until the connector is out of the slot FIGURE 11 3 7 Remove the card extractor from the MBus module Note Save the extractor for future use 8 Place the MBus module on an antistatic surface SPARCstation 20 Service Manual July 1996 Card extractor Hot surface FIGURE 11 2 Extractor Installation on a Single Wide MBus Module MBus module Hot surface FIGURE 11 3 Removing a Single Wide MBus Module 145 Chapter 11 System Board and Component Replacement AN Installing a Single Wide MBus Module Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Push the MBus module retainers to the unlocked position Position the MBus module so that the MBus module connector faces the appropriate slot FIGURE 11 4 Back panel MBus slot 0 FIGURE 11 4 I
82. ctive board The new system board already has the correct OpenBoot PROM installed Connect the following to the system board FIGURE 11 42 Diskette connector optional SCSI connector DC power connector Speaker LED connector Remove the wrist strap and replace the cover See Chapter 7 Turn on system power See Chapter 6 SPARCstation 20 Service Manual July 1996 Diskette connector optional SCSI connector DC power connector Speaker LED connector FIGURE 11 42 Connecting Diskette SCSI DC Power and Speaker LED Connectors OpenBoot PROM To remove and install an OpenBoot PROM proceed as follows Note It is not necessary to transfer the OpenBoot PROM from an existing system board to a replacement system board Chapter 11 System Board and Component Replacement 7 178 Removing an OpenBoot PROM Remove power from the system See Removing Power from the System on page 45 Remove the cover and attach the wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Remove any SBus cards See
83. ctor hard drives plug into the SCSI backplane The SCSI single connector drive sockets provide SCSI data SCSI addressing and power Remove power from the system See Removing Power from the System on page 45 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Remove the hard disk drive s See Removing a Hard Disk Drive on page 117 Disconnect the SCSI backplane sockets and connectors as follows FIGURE 8 26 a Press the clip on the DC power connector b Disconnect the DC power connector from the SCSI backplane socket c Disconnect the DC power connector clip from the DC power socket d Disconnect the SCSI data connector from the SCSI data socket SPARCstation 20 Service Manual July 1996 SCSI data socket DC power socket Single connector drive sockets SCSI data connector DC power connector clip FIGURE 8 26 SCSI Backplane Sockets and Connectors Remove the two Phillips head screws that secure the SCSI backplane to the plastic mounting bracket FIGURE 8 27 Note The DC power socket and the SCSI data socket are located on the right side of the SCSI backplane This part of the SCSI backplane e
84. d Component Replacement Chapter 12 Illustrated Parts Breakdown Provides system board description and damage prevention identifies replaceable system board components Provides step by step procedures to remove and replace the system board and to remove and replace various components associated with system board operation Lists replaceable parts for the SPARCstation 20 system Part 7 Appendixes Glossary and Index Appendix A B and C Glossary Index Provides physical electrical and environmental specifications a functional description of the SPARCstation 20 system connector pinouts and signal descriptions and information on SCSI targeting Provides a listing of acronyms terms and definitions Provides a quick reference to specific topics Warnings and Cautions Caution This equipment contains lethal voltage Accidental contact can result in serious injury or death SPARCstation 20 Service Manual July 1996 gt gt lt Caution The surface of the SuperSsPARC and hyperSPARC CPU chips may be hot and cause personal injury if touched Avoid contact Caution Improper handling by unqualified personnel can cause serious damage to this equipment Unqualified personnel who tamper with this equipment may be held liable for any resultant damage to the equipment Caution Use proper ESD grounding techniques when handling components Wear an antistati
85. ddresses are mapped out by the memory management hardware The physical memory starting address of any capacity DSIMM installed will always be as listed in TABLE 4 4 TABLE 4 4 lists SIMM slot layout and installation sequence Chapter 4 Troubleshooting Procedures 35 SIMM locations J0201 bank 0 J0202 bank 2 J0203 bank 5 J0301 bank 3 J0302 bank 6 i j J0303 bank 1 VSIMM 0 J0407 J0304 bank 7 d j VSIMM 1 J0406 J0305 bank 4 L oo J0304 can be used for a VSIMM or DSIMM J0305 can be used for a DSIMM VSIMM or NVSIMM y 0 36 FIGURE 4 3 System Board SIMM Slot Locations Note The order of the banks listed in TABLE 4 4 are not the same as the physical order of the DSIMM slots on the system board TABLE 4 5 shows the physical order of the slots A DSIMM must always be installed in J0201 DSIMM0 slot The first VSIMM is always installed in J0304 DSIMM6 slot If a second VSIMM is installed in J0305 DSIMM7 slot an Auxiliary Video Board AVB must be installed on the system board Only one NVSIMM is supported If used it is installed 5 DSIMM7 slot TABLE 4 5 SIMM Slot Layout and Installation Sequence VSIMMs and or NVSIMM Installation Sequence Slot Layout DSIMM J0201 DSIMMO
86. e Achassis that supports the SunCD 4 drive 1 6 inch drive Removing and installing the diskette data cable varies depending on the chassis The following sections provide diskette data cable removal and installation for each chassis type Removing the Diskette Drive Cable SunCD 2Plus Drive Type Chassis Remove power from the system See Removing Power from the System on page 45 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Remove the CD ROM drive See CD ROM Drive on page 123 Perform Step 1 through Step 3 in Removing a Diskette Drive on page 127 Locate the diskette drive cable FIGURE 8 43 SPARCstation 20 Service Manual July 1996 Diskette drive cable FIGURE 8 43 Diskette Drive Cable Location 6 Pull the plastic cable tab to disconnect the diskette drive cable from the system board FIGURE 8 44 Plastic tab i Connect to Diskette drive system board connector Diskette drive cable Plastic tab f emea FIGURE 8 44 Diskette Drive Cable Plastic Tab Chapter 8 Removing and Installing Subassemblies 9 7 Carefully pul
87. e or if the keyboard is disconnected See Chapter 3 Includes Ethernet diskette drive controller and other tests Must be at the ok prompt to execute on board diagnostics See OpenBoot PROM Diagnostics on page 12 Initiated under the operating system Tests system resources and peripherals See SunDiag User s Guide for more information See SunDiag System Exerciser on page 14 Executes multiple diagnostic hardware tests from a single user interface and is used to verifying configuration and functionality of most hardware controllers and devices See SunVTS 2 0 User s Guide for more information See Section Sun VTS on page 2 15 Chapter 2 Troubleshooting Overview 11 TABLE 2 2 Autoboot and Diagnostic Switch Settings Autoboot Switch Diagnostic Switch Result False Either true or false ok prompt OpenBoot PROM commands True False Boot operating system from disk default True True Boot operating system from network default OpenBoot PROM Diagnostics On board diagnostics are executed from the ok prompt If there is a problem with the operating system the system will default to the ok prompt The ok prompt can also be accessed by shutting down the operating system TABLE 2 3 describes selected OpenBoot PROM diagnostic tests and what must occur before each test can be executed Some of the tests verify the proper operation of the network controller while other tests verify the diskette drive syst
88. e SBus Card Extractor Chapter 11 System Board and Component Replacement 5 Installing an SBus Card Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 1 Place the SBus card on an antistatic surface 2 If required set the card jumpers or switches See the manual for the SBus product 3 If the SBus card has tabs on the back plate remove the two small Phillips screws that attach the adapter bracket to the back plate and remove the adapter bracket FIGURE 11 16 Adapter bracket FIGURE 11 16 Removing the SBus Card Adapter Bracket 4 Remove the card extractor from the SBus card as follows a Bend one leg of the extractor outward slightly until the hook clears the hole in the SBus card FIGURE 11 17 b Remove the other side of the extractor which should come out easily without bending 5 Push the rear card retainers back on the system board FIGURE 11 17 and FIGURE 11 18 156 SPARCstation 20 Service Manual July 1996 Note FIGURE 11 17 and FIGURE 11 18 show a double wide SBus card and a single wide SBus card respectively being installed FIGURE 11 17 Installing a Double Wide SBus Card SBus card SBus card connector Side view back panel Retainers Card back plate SBus slot FIGURE 11 18 Installing a Sing
89. e power supply toward the drive bracket and free of the chassis mounts d Lift the power supply from the chassis 56 SPARCstation 20 Service Manual July 1996 Power supply Power supply rear view DC power AY harness Captive screw 2 N D System unit backplane metal edge Wriststrap FIGURE 8 1 Attaching a Wrist Strap to Back Panel and Removing the Power Supply 5 Disconnect the DC power harness from the rear of the power supply FIGURE 8 2 6 Set the power supply aside Chapter8 Removing and Installing Subassemblies 57 A Power supply rear view DC power harness AN DC power connector FIGURE 8 2 Power Supply and DC Power Harness Installing the Power Supply Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Grasp the power supply with one hand with the other hand connect the DC power harness to the rear of the power supply FIGURE 8 2 Lower the power supply into the chassis at an angle such so the DC power harness fits under the edge of the chassis drive bracket Slide the power supply toward the rear of the chassis until it locks in the power supply chassis mounts Caution Do not use a power driver to tighten the captive screws Do not overtighten the captive screws Tighten
90. eases VSIMMs Internal Options TABLE 1 2 lists the internal options of the SPARCstation 20 system TABLE 1 2 Internal Options Quantity Option max Description SBus card 4 System board contains four SBus slots 32 bit wide data bus 25 MHz bus speed MBus module 2 Provides additional microprocessor modules 64 bit wide data bus Hard disk drive 2 Supports up to two 3 5 inch 535 Mbyte or 1 05 Gbyte 2 1 Gbyte formatted single connector disk drives SunCD 2Plus 1 Internal double speed 644 Mbyte CD ROM drive SunCD 4 1 Internal quad speed 644 Mbyte CD ROM drive SPARCstation 20 Service Manual July 1996 TABLE 1 2 Internal Options Continued Option Diskette drive AVB DSIMM VSIMM NVSIMM Quantity max 1 Description Internal diskette drive triple density MS DOS IBM compatible Operates with the second VSIMM option provides second 13W3 video output Supports up to 512 Mbytes of DSIMMs DSIMM capacities are 16 32 and 64 Mbyte Supports up to 2 VSIMMs VSIMM capacities are 4 and 8 Mbyte Provides non volatile disk I O storage for file system acceleration occupies one VSIMM slot External Options TABLE 1 3 lists the external SCSI options TABLE 1 3 External SCSI Options Unit Desktop backup pack Description Tape drive 150 Mbyte 25 inch QIC 150 2 5 Gbyte 5 Gbyte 8 mm 10 Gbyte 14 Gbyte 5 Gbyte 4 mm 20 Gbyte 4 mm DAT Desktop disk pack
91. em on page 45 2 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 3 Disconnect the fan DC power connector FIGURE 8 10 4 Detach the fan DC power cable free from beneath the metal cable restraint 5 Remove the fan as follows a Grasp the fan housing firmly Chapter 8 Removing and Installing Subassemblies 7 b Place the tip of a small flat blade screwdriver under the fan side mounting clip and pry it up to free the fan clip from the chassis metal drive bracket c While prying the clip up pull the fan housing toward the center of the system to free the bottom clip from the chassis FIGURE 8 11 d Set the fan aside Fan DC power connector Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 10 Disconnecting the Fan DC Power Connector 68 SPARCstation 20 Service Manual July 1996 Side mounting clip Fan assembly Metal drive bracket Bottom mounting clip Chassis bottom slot Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 11 Removing the Fan Installing the Fan Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD s
92. em memory and system clock Appendix E provides a detailed description of each test TABLE 2 3 OpenBoot PROM Diagnostic Tests Type of Test Description Preparation test screen Tests the video graphics hardware and The diag switch NVRAM parameter must monitor be set to true test floppy Tests the diskette drive response to Insert a formatted diskette into the drive commands test scsi Tests the system board SCSI interface The diag switch NVRAM parameter must logic be set to true test net aui Performs an internal and external A cable must be connected between the rear loopback test on the AUI Thick panel AUI Ethernet port and the Ethernet Ethernet interface transceiver test net tpe Performs an internal and external A cable must be connected between the rear loopback test on the TPE interface panel TPE port and a TPE hub If the tpe link test parameter is false disabled the external loopback test will appear to pass even if a cable is not connected test net Performs an internal and external A cable must be connected between the system loopback test on the auto selected and the Ethernet transceiver or hub system Ethernet interface 12 SPARCstation 20 Service Manual July 1996 Type of Test TABLE 2 3 Description OpenBoot PROM Diagnostic Tests Continued Preparation test disk test disk0 test disk1 test disk2 test disk3 test cdrom test tape test tapeO test tapel test ttya test ttyb test keyb
93. ement 1 Diskette connector optional SCSI connector DC power connector Ll Speaker LED connector FIGURE 11 36 Disconnecting Diskette SCSI DC Power and Speaker LED Connectors 5 At the chassis rear loosen the lower two captive screws FIGURE 11 37 0 76 2 O iil a J 0000 O Captive screw Captive screw FIGURE 11 37 System Board Captive Screws 172 SPARCstation 20 Service Manual July 1996 Slide the system board toward the back of the chassis until it clears the plastic card guide FIGURE 11 38 Lift the back of the system board slightly Slide the system board clear of the plastic card guide and out of the chassis Place the system board on an antistatic surface Note If a captive screw is in the upper right corner of the system board back panel remove the screw by backing it out of the plastic back panel cover This screw will be needed to secure the top cover to the chassis ix Card guide R Y 5 X we System board FIGURE 11 38 Removing the System Board Jumper Settings Verify the jumper settings of the clock speed jumper J1401 and the serial p
94. en the two captive screws on the back panel that secure the system board to the chassis FIGURE 8 30 SBus slots 2and3 A o o 2 6 OO l 6 7 6 Som ove o Q o Captive screw Captive screw FIGURE 8 30 Back Panel SBus Slots and Captive Screws 6 Press the plastic connector clip and disconnect the DC power connector from the SCSI backplane FIGURE 8 31 6 T sae SCSI backplane mz on i GC 3G oo o 2 6 4 c 0 4 SCSI data connector P3 DC power connector clip DC power connector P1 FIGURE 8 31 SCSI Backplane SCSI Data and DC Power Connectors 7 Slide the system board back slightly to access the internal cables 90 SPARCstation 20 Service Manual July 1996 10 11 Remove the SunCD 2Plus CD ROM drive if installed See Removing a CD ROM Drive on page 123 Disconnect the SCSI data connector P3 from the SCSI backplane Free the SCSI data cable from the metal cable guides on the chassis bottom and from the plastic hooks on the system board card guide Remove the SCSI data cable Installing the SCSI Data Cable SunCD 2Plus Drive Type Chassis Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in an
95. ensitive components in antistatic bags before placing it on any surface Chapter 8 Removing and Installing Subassemblies 69 Note Some units have built in fan DC power cables in the system DC power harness and the separate fan DC harness is not used Systems having separate fan DC power harness must have the fan DC power harness connected to the CD ROM drive DC power connector 1 Insert the fan bottom mounting clip into the opening at the bottom of the system chassis Place the side mounting clip over the edge of the chassis FIGURE 8 12 Note Position the fan assembly so that it does not interfere with the removal of the system hard disk drives Fan DC power connector Bottom mounting clip FIGURE 8 12 Fan Assembly 2 Push the fan side mounting clip against the vertical edge of the chassis FIGURE 8 13 70 SPARCstation 20 Service Manual July 1996 Side mounting clip Fan assembly Locate side mounting clip against this surface Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 13 Mounting the Fan Assembly 3 Place the notched tip of the fan installation tool over the side mounting clip and press down FIGURE 8 14 Chapter 8 Removing and Installing Subassemblies 71 Fan installation tool Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 14 Securing the Fan Assembly Using the Fan Installation Tool 4 Connect the fan
96. g Power from the System on page 45 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Chapter 8 Removing and Installing Subassemblies 3 3 Disconnect the DC power cable SCSI data cable diskette data cable and speaker LED cable from the system board FIGURE 8 40 4 Loosen the two captive Phillips head screws that secure the system board to the chassis rear FIGURE 8 41 Cable clip 2 located _ chassis floot Speaker LED cable Cable clip 3 DC power located on harness chassis wall SCSI data cable SCSI backplane Diskette data S poner _ lt 4 a SCSI data cen connector DC power connector Speaker LED connector Note Figure illustrates SunCD 4 drive type 1 6 inch drive chassis only FIGURE 8 40 Internal Cables and DC Power Connector SunCD 4 Drive Type Chassis O moo 0 00 o o Q Captive screw Captive screw FIGURE 8 41 Back P
97. ge ESD Precautions 42 6 Power Onand Off 45 Removing Power from the System 45 Restarting the System While Troubleshooting 46 Reading Boot Messages 7 Turning On the Power 47 7 Internal Access 49 SPARCstation 20 Service Manual July 1996 Removing the Cover 49 Attaching the Wrist Strap 50 Replacing the Cover 51 Removing and Installing Subassemblies 55 Power Supply 55 Removing the Power Supply 55 Installing the Power Supply 58 LED 60 Removing the LED 0 Installing the LED 3 Speaker 64 Removing the Speaker 64 Installing the Speaker 66 Fan Assembly 7 Removing the Fan 7 Installing the Fan 69 Removing the Fan DC Power Harness 74 Installing the Fan DC Power Harness 9 SCSI Backplane 83 Removing the SCSI Backplane 84 Installing the SCSI Backplane 7 SCSI Data Cable 88 Removing the SCSI Data Cable SunCD 2Plus Drive Type Chassis 88 Installing the SCSI Data Cable SunCD 2Plus Drive Type Chassis 91 Removing the SCSI Data Cable SunCD 4 Drive Type Chassis 93 Contents v vi 10 Installing the SCSI Data Cable SunCD 4 Drive Type Chassis 96 DC Power Harness 97 Removing the DC Power Harness SunCD 2Plus Drive Type Chassis 97 Installing the DC Power Harness SunCD 2Plus Drive Type Chassis 102 Removing the DC Power Harness SunCD 4 Drive Type Chassis 103 Installing the DC Power Harness SunCD 4 Drive Type Chassis 106 Diskette Drive Cable 107 Removing the Diskette Drive Cable SunCD 2Plus Drive Type Chassis
98. good packet X is a bad packet Type any key to stop The wat 0 66 811 command monitors Ethernet packets on all Ethernet interfaces installed in the system one at a time For example if an SBus Ethernet card is installed in one of the system SBus slots wat ch net all monitors the Ethernet transmissions detected by that card Appendix Selected On Board Diagnostics 225 Note When watch net all is interrupted by pressing any key it initiates testing of the next system Ethernet interface CODE EXAMPLE E 6 watch net all Command Output Message ok watch net all iommu f e0000000 sbus f e 0001000 lebuffer 1 40000 le 1 60000 Internal loopback test succeeded External loopback test succeeded Looking for Ethernet packets is a good packet X is a bad packet Type any key to stop iommu f e0000000 sbus f e0001000 ledma f 400010 le f c00000 Internal loopback test succeeded External loopback test succeeded Looking for Ethernet packets is a good packet X is a bad packet Type any key to stop 226 probe scsi probe scsi all The probe scsi command transmits an inquiry command to internal and external SCSI devices connected to the SPARCstation 20 on board SCSI interface If a SCSI device is connected and powered up the target address unit number device type and manufacturer name is displayed The probe scsi all command transmits an in
99. he Solaris release being operated TABLE 2 4 SunVTS Documentation Title Part Number Description SunVTS User s Guide 802 5331 Describes the SunVTS environment starting and controlling various user interfaces feature descriptions SunVTS Test Reference Manual 802 5330 Describes each SunVTS test provides various test options and command line arguments SunVTS Quick Reference Card 802 5329 Provides overview of vt sui interface features The main features of the SunVTS environment include SunVTS kernel SunVTS user interface SunVTS teletype SunVTS Kernel The SunVTS kernel vt sk diagnostic tool controls all testing and operates in the OpenWindows background When activated vtsk probes the hardware configuration of the system tested and responds to vt sui vt sk coordinates execution of individual tests and manages the messages sent by these tests SunVTS User Interface The SunVTS user interface vt sui diagnostic tool operates in the OpenWindows background Upon activation vtsui provides vt sk control various user options tests and read log files Chapter 2 Troubleshooting Overview 5 SunVTS Teletype The SunVTS teletype vt stty diagnostic tool controls the vt sk from either a command shell or a terminal attached to a serial port Most options available in vtstty have equivalent options in vtsui vtstty is applicable to server configurations only 16 SPARCstation 20 Service Manual July 1996
100. ilure Scroll Lock on MBus module in slot 0 failure Compose on DSIMM in slot J0201 failure An indication of POST failure is when the keyboard Stop L1 and D keys are pressed and held when powering on the system and the Caps Lock key indicator does not flash on and off See System Board Test for troubleshooting information Completing POST When the POST is completed determine if it passed or failed If POST passed but operational integrity of the system is questionable initiate the OpenBoot PROM diagnostics If POST failed use the keyboard LED indicator status or a displayed error message if a terminal or tip window was established to verify the failure Chapter 25 26 SPARCstation 20 Service Manual July 1996 CHAPTER 4 Troubleshooting Procedures This chapter describes how to troubleshoot possible problems and includes suggested corrective actions TABLE 4 1 identifies system problems and corrective actions TABLE 4 1 Troubleshooting Tips System Problem LED on front of system not lit Disk drive fails to boot or does not respond Operating system does not recognize disk drive at boot No video output on monitor Corrective Action Verify that the power switch is turned on and that the power cord is connected to the system and an AC receptacle If the power switch is in the on position and the power cord is connected shut down the system and verify that the LED cable is connected If the LED cable is
101. iners closest to the MBus slot FIGURE 11 5 Remove the four screws and rectangular washers from the MBus module and the back panel FIGURE 11 6 Note Save the screws and washers for future use Hold each edge of the MBus module and pull up on the module until the connector is out of the slot FIGURE 11 7 Place the MBus module on an antistatic surface FIGURE 11 6 MBus Module Back Panel Screws and Washers SPARCstation 20 Service Manual July 1996 AN MBus module double wide Back panel Hot surface FIGURE 11 7 Removing a Double Wide MBus Module Installing a Double Wide MBus Module Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 1 Unlock the MBus module retainers and the SBus card retainers FIGURE 11 8 Chapter 11 System Board and Component Replacement 9 2 Back panel FIGURE 11 8 Installing a Double Wide MBus Module 2 Insert the MBus module back plate into the system back panel hook the MBus module back plate into the back panel slot FIGURE 11 9 Note A double wide MBus module installs and has a back plate like an SBus card The connector on the MBus module should face the appropriate MBus module slot Caution An MBus module must be installed in MBus module slot 0 or the system wil
102. ing language The Toolkit provides access to an extensive set of functions for performing fault isolation and debugging A printed circuit board installed in an SBus slot of the system unit that controls a video display Integrated circuit Identification input output A device that inputs data to a computer CPU and receives data from a computer CPU Input device for entering data The port on the SPARCstation 20 system unit where the keyboard cable is connected Local area network control for Ethernet Light emitting diode See address SPARCstation 20 Service Manual July 1996 MACIO MBus module Mbyte MDI MMU Monitor 1 Monitor 2 MSBI NVRAM NVSIMM on board diagnostics Pok POST printed circuit board PROM RAM RH ROM SBus card SCC SBus to SCSI Ethernet and parallel interface An ASIC that integrates three functions DMA LANCE and fast SCSI bus interface Provides the interface between the SBus and the following SCSI thick AUI Ethernet TPE and parallel port A printed circuit board installed in an MBus slot of the system unit that contains the CPU circuitry and components Megabyte Memory display interface Memory management unit Indicated by the gt prompt From the gt prompt you can boot the system continue the execution of a halted program or enter the Forth Toolkit If disaster happened to your operating system the Monitor automatically starts A video disp
103. ing Power from the System on page 45 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Locate the LED at the shrink wrapped end of the LED cable and the in line connector FIGURE 8 5 SPARCstation 20 Service Manual July 1996 In line connector Speaker spade connector large Shrink wrapped LED wires Speaker spade connector small LED Speaker LED system FIGURE 8 5 Speaker LED Cable Detail Note Three tabs on the LED light pipe secure the LED to the right front corner of the chassis FIGURE 8 6 Use the tip of a small screwdriver to work the cable and LED free from the light pipe tabs FIGURE 8 6 Disconnect the shrink wrapped section of the LED cable from the in line connector FIGURE 8 7 Chapter 8 Removing and Installing Subassemblies 61 System right front corner Light pipe tabs Shrink wrapped LED cable FIGURE 8 6 LED Light Pipe Detail 62 SPARCstation 20 Service Manual July 1996 Shrink wrapped LED cable In line connector Speaker
104. ing table lists the default system prompt and superuser prompt for the C shell Bourne shell and Korn shell TABLE P 4 Shell Prompts Shell Prompt C shell prompt machine_name C shell superuser prompt machine_name Bourne shell and Korn shell prompt Bourne shell and Korn shell superuser prompt xxiv SPARCstation 20 Service Manual July 1996 CHAPTER 1 Product Description The SPARCstation 20 system accommodates up to 512 megabytes Mbytes of memory using dynamic single in line memory modules DSIMMs and video single in line memory modules VSIMMs Installing a second VSIMM is done through the optional auxiliary video board AVB Standard Features The SPARCstation 20 system has four audio ports on the back panel and contains an internal speaker A variety of internal storage devices are available 535 Mbyte hard disk drive 1 05 Gbyte hard disk drive 2 1 Gbyte hard disk drive Diskette drive SunCD 2Plus drive SunCD 4 drive Note The SPARCstation 20 system is configured with one of two chassis types a chassis that supports the 1 inch SunCD 2Plus drive and a chassis that supports the 1 6 inch SunCD 4 drive FIGURE 1 1 shows a typical SPARCstation 20 system Appendix B provides detailed system information 2 y 8 FIGURE 1 1 SPARCstation 20 System
105. is properly connected to the system back panel power receptacle and to the wall outlet Caution This equipment contains lethal voltage Accidental contact can result in serious injury or death 3 Using a VOM verify that the wall outlet is supplying AC power to the system 4 Restore DC power to the system Press the back panel power switch to ON and observe the keyboard The keyboard LEDs should briefly light An audible tone from the keyboard should be heard Ifno tone is heard or if no lights are seen the power supply may be defective See Power Supply Test on page 29 m Ifa tone is heard and lights are seen but the system still fails to initialize see System Board Test on page 31 Power Supply Test To test the power supply 1 Using a VOM check the output voltages of the power supply FIGURE 4 1 FIGURE 4 2 and TABLE 4 2 Place the VOM negative probe on one of the logic ground pins in the connector and test the 12V 12V and 5V power pins individually with the positive probe pins 1 through 8 Note The power supply connector must remain connected to the system board during this test This allows the power supply to regulate the voltage Chapter 4 Troubleshooting Procedures 9 2 Replace the power supply assembly if any of the voltages are not present See Power Supply on page 55 1 23 4 5 6 7 8 9
106. istatic bags before placing it on any surface Remove the CD ROM drive as follows FIGURE 9 5 a Push the CD ROM drive forward and slide it toward the outer edge of the chassis to disengage it b Disconnect the SCSI data cable and DC power cable from the CD ROM drive Note Leave the cables connected to the system board c Lift the CD ROM drive up and toward the chassis edge and remove it from the chassis d Place the CD ROM drive on an antistatic surface Chapter9 Storage Devices 3 CD ROM drive DC power cable Chassis edge FIGURE 9 5 Removing the CD ROM Drive Installing a CD ROM Drive To install a CD ROM drive Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Note Ensure that the same drive type is installed Ensure proper jumper installation as follows a For the SunCD 2Plus CD ROM drive at pins ID4 ID2 and Term power FIGURE 9 6 b For the SunCD 4 drive at pins 1124 1122 and Term power FIGURE 9 7 SPARCstation 20 Service Manual July 1996 Note The two ID select jumpers set the SCSI address of the drive to 6 A parity jumper may also need to be installed ID select SCSI data interface connector Parity 421 Prevent Allow Test SCSI bus terminators Term power 0 0 0 0
107. itch 46 switch standby 139 system 45 power off 228 power on does not succeed 29 self sest 17 sequence 46 standby 46 precautions 41 ESD 42 preface xix preventing damage 139 printed circuit board handling 40 PCB 40 probe scsi 14 33 scsi all 14 probe scsi 226 probe scsi command output message 227 probe scsi all 226 probe scsi all command output message 227 procedures troubleshooting 27 product description 1 specifications 191 R rear view SunCD 2Plus 125 SunCD 4 drive 125 238 SPARCstation 20 Service Manual July 1996 related documentation xxii removing AVB 168 169 CD ROM drive 123 124 cover 50 DC power harness SunCD 2Plus drive type chassis 97 SunCD 4 drive type chassis 103 diskette drive 127 131 diskette drive cable SunCD 2Plus drive type chassis 108 SunCD 4 drive type chassis 111 double wide MBus module 147 149 SBus card 154 fan 67 69 hard disk drive 117 120 LED 60 NVRAM TOD 180 OpenBoot PROM 178 power from the system 45 power supply 57 SBus card 152 adapter bracket 156 extractor 155 SCSI backplane 84 SCSI data cable SunCD 2 Plus drive type 88 SunCD 4 drive type chassis 93 SIMM 161 single wide MBus module 143 145 speaker 64 subassemblies 55 system board 95 105 171 173 replacement component 143 part numbers 183 parts list 183 system board 143 replacing cover 51 requirements operating systems 6 safety 39 softwa
108. itions and corrective actions To test the disk drive Note To verify if the built in SCSI controller is defective test the disk drive response to the probe scsi command 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 226 1 At the ok prompt type probe scsi See the following example ok probe scsi Target 1 Unit 0 Disk SEAGATE ST31200W SUN1 05802200015063 Copyright c 1993 Seagate All rights reserved 0000 Target 3 Unit 0 Disk CONNER CP30548 SUNO535BOBB93086K4S Target 6 Unit 0 Removable Read Only device TOSHIBA CD ROM XM4101TA289310 16 93 Note If the disk drive responds and a message 18 displayed the system SCSI controller has successfully probed the devices This indicates that the system board is working correctly 2 If a disk does not respond a Ensure that every SCSI disk and other SCSI devices on the SCSI bus have a different SCSI address Note Internal SCSI drives are automatically assigned SCSI address 3 bottom drive and 1 top drive SCSI address 6 is normally reserved for the optional internal CD ROM drive Do not assign SCSI address 7 to any device This address is reserved for the SCSI controller on the system board Chapter 4 Troubleshooting Procedures 33 34 b If external devices are connected verify that all SCSI cables and the SCSI terminator are co
109. k module info MBus 50 00 MHz SBus 25 00 MHz CPU 0 50 00 MHz SuperSPARC CPU 2 50 00 MHz SuperSPARC 228 SPARCstation 20 Service Manual July 1996 Glossary address AUI port AVB back up board Boot boot PROM Boot PROM diagnostics buffer cables cache card CPU DAC Refers to a location within a computer system memory The word location is a synonym Reference is usually made to an address for the purpose of retrieving or storing information Attachment unit interface port The port on the SPARCstation 20 system unit where the AUI adapter cable is connected Auxiliary video board Supports graphic capabilities when used with a second VSIMM option To make a copy of files on media such as a disk or tape See printed circuit board To load the system software into memory and initiate system operation Refers to the system board OpenBoot PROM chip This chip contains boot code and a Forth Monitor program The OpenBoot PROM is connected to the I O data bus The diagnostic firmware in the boot PROM These diagnostics include the Power On Self Test POST and on board diagnostics The auxiliary data storage device that holds data temporarily and which may also perform other functions in conjunction with various I O machines Wires or bundles of wires configured with connectors at each end and used to connect two or more hardware devices A mechanism for accelerating a microprocessor
110. l not work 150 SPARCstation 20 Service Manual July 1996 System back panel slot MBus module MBus module back plate FIGURE 11 9 Seating a Double Wide MBus Module back Plate Side View Caution Fingers should be on either side of the MBus module connector Do not press both ends of the MBus module because only one connector is on the module Place fingers over each side of the MBus module connector and press down firmly until the MBus module is fully inserted into the slot Lock the retainers over the edge of the MBus module FIGURE 11 10 Note If the MBus module is not fully inserted into the MBus slot the retainers may not lock over the edge of the MBus module The arrows in FIGURE 11 10 point to the retainers that must lock Remove the wrist strap and replace the cover See Chapter 7 Power on the system See Chapter 6 Chapter 11 System Board and Component Replacement 151 Double wide Back panel FIGURE 11 10 Locking the MBus Module Retainers SBus Card To remove and install an SBus card proceed as follows Removing an SBus Card 1 Remove power from the system See Removing Power from the System on page 45 2 Remove the cover and attach the wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before
111. l the end of the diskette drive cable that connects to the system board through the sheetmetal opening into the drive bracket area FIGURE 8 45 8 Remove the diskette drive cable from the drive bracket area of the chassis Diskette drive cable connected to system board Sheetmetal opening FIGURE 8 45 Pulling the Diskette Drive Cable Through the Drive Bracket Opening Installing the Diskette Drive Cable SunCD 2Plus Drive Type Chassis Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 110 SPARCstation 20 Service Manual July 1996 Note The replacement diskette drive cable should be folded at an angle to connect properly See FIGURE 8 44 Work the end of the diskette drive cable that connects to the system board through the sheetmetal opening in the drive bracket and connect it to the system board FIGURE 8 45 Note Connectors and terminals are keyed to ensure proper connection Pick up the diskette drive and hold it above the drive area of the chassis Perform Step 1 through Step 2 of Section Installing a Diskette Drive on page 9 132 Install the CD ROM drive if it was removed earlier See Section Installing a CD ROM Drive on page 9 124 Remove the wrist strap and replace the cover See Chapter 7 Powe
112. lay unit that is part of the SPARCstation 20 system It is not the same as a terminal MBus to SBus interface Non volatile RAM Non volatile single in line memory module Tests that allow you to test the network controller diskette drive system memory cache system clock and watch the network for valid Ethernet data packets Power ok A signal from the power supply that is activated after DC voltages are nominal Power on self test Executes when you turn on the system power switch or reboot the system and press and hold the keyboard Stop L1 and D keys Initiated from the OpenBoot PROM POST is a series of rudimentary tests designed to verify that the major components on the system board and the MBus modules installed within the system are operating properly Any board with electronic wiring etched on it Programmable read only memory Random access memory Relative humidity Read only memory A printed circuit board installed in an SBus slot of the system unit Serial communications controller Glossary 231 SCSI SEC SIA SMC SunDiag System Exerciser SunVTS system monitor terminal TOD TPE UART VBC VSIMM wrist strap 232 Small computer system interface SBus to external bus interface An ASIC ASIC that provides the interface between the SBus and the external bus Serial Interface Adapter Scalable memory controller Diagnostic software that operates under SunOS system software disp
113. lays real time use of system resources and peripheral equipment Sun verification test suite Diagnostic software that operates under SunOS software See Monitor 1 or 2 A device that consists of a video display and keyboard Used to type and display information A terminal may be connected to either of the RS 423 RS 232 serial interface ports on the backpanel of the SPARCstation 20 system Time of day Twisted pair Ethernet Universal asynchronous receiver transmitter Video buffer chip Video single in line memory module A printed circuit board containing static random access memory SRAM chips A primary system VSIMM uses the backpanel 13W3 graphics connector Availability of a secondary system VSIMM through conjoint operation with optional AVB A device that provides grounding for static electricity between your body and the system unit chassis Electric current and voltage do not pass through the wrist strap SPARCstation 20 Service Manual July 1996 Index NUMERICS 13W3 connector 215 pin assignments 215 A abbreviated POST 19 access internal 49 antistatic mat 40 architecture system 195 attaching cables SPARCstation 20 135 wrist strap 50 57 audio line in connector 217 line out connector 217 port 1 port signals 216 ports 216 audio line in connector 217 audio line out connector 217 AUI 224 connector 207 pin assignments 207 auxiliary video board 168 AVB installed 169
114. le Wide SBus Card Chapter 11 System Board and Component Replacement 157 6 Install the Sbus card as follows FIGURE 11 18 7 Install the screws and washers into the SBus card back plate FIGURE 11 19 a Slide the card at an angle into the back panel of the system Hook the card back plate under the lip on the back panel Be sure the SBus card back plate shows through the slots on the back panel Note The back plate connector s may not align with other connectors in the back panel Caution Do not use force Align the card connector and slot properly or card pin damage may occur b Align the SBus card connector with the SBus slot on the system board Gently press the corners of the card to seat the connector into the slot c Push the retainers forward over the edge of the SBus card 8 Remove the wrist strap and replace the cover See Chapter 7 9 Power on the system See Chapter 6 Washer 2 FIGURE 11 19 SBus Card Back Panel Screws and Washers 158 SPARCstation 20 Service Manual July 1996 DSIMMs VSIMMs and NVSIMMs The SPARCstation 20 system supports as many as eight dynamic single in line memory modules DSIMMs DSIMMs are available in three capacities 16 Mbyte 32 Mbyte and 64 Mbyte In addition the SPARCstation 20 system supports up to two video single in line memory modules VSIMMs and one non volatile SIMM NVSIMM VSIMMs are available in two capacities 4 Mbyte and 8 Mbyte
115. lecting Ethernet cable I F Trying AUI Received packet on AUI Select cable AUI succeeded Looking for Ethernet packets is a good packet is a bad packet Type any key to stop The SPARCstation 20 system has two types of on board Ethernet interfaces 10Base T 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 The system automatically selects which interface is connected and active The AUI port is first tested by transmitting data packets and checking for No Carrier or response packets If the AUI test fails the TPE port is then tested This automatic selection occurs by typing wat ch net CODE EXAMPLE E 5 identifies the watch net command output message CODE EXAMPLE E 5 identifies the watch tpe command output message CODE EXAMPLE E 5 identifies the wat ch net all command output message SPARCstation 20 Service Manual July 1996 Note Selecting a specific Ethernet interface to monitor may be controlled through these user specific commands wat ch tpe monitors the TPE connection watch aui monitors the thick Ethernet connection wat ch net all monitors Ethernet packets on all installed Ethernet interfaces one at a time CODE EXAMPLE E 5 watch tpe Command Output Message ok watch tpe Internal loopback test succeeded External loopback test succeeded Looking for Ethernet packets is a
116. mory System 1 MACIO ASIC Functional Block Diagram 203 SEC ASIC Functional Block Diagram 204 Parallel Connector 205 AUI Connector 207 Keyboard and Mouse Connector 209 Serial Ports A and B Connector 210 Twisted pair Ethernet Connector 211 SCSI Connector 212 13W3 Connector 215 Back Panel Audio Ports and Icons 6 Microphone Icon 217 Audio Line Out Icon 217 Audio Line In Icon 217 Audio Line in Icon 217 xvi SPARCstation 20 Service Manual July 1996 TABLE 1 1 TABLE 1 2 TABLE 1 3 TABLE 2 1 TABLE 2 2 TABLE 2 3 TABLE 2 4 TABLE 3 1 TABLE 4 1 TABLE 4 2 TABLE 4 3 TABLE 4 4 TABLE 4 5 TABLE 5 1 TABLE 12 1 TABLE A 1 TABLE A 2 TABLE A 3 TABLE A 4 TABLE A 5 Tables SPARCstation 20 System Configurations and Software Requirements Internal Options 6 External SCSI Options 7 Diagnostic Tools 11 Autoboot and Diagnostic Switch Settings 2 OpenBoot PROM Diagnostic Tests 2 SunVTS Documentation 15 Keyboard Key LED Description 25 Troubleshooting Tips 7 Power Supply Connector Pin Assignments 31 Troubleshooting Disk Drive Errors 4 SIMM Slots and Physical Address 35 SIMM Slot Layout and Installation Sequence 36 Safety Precautions 40 Replacement Parts List and Part Numbers 3 Physical Specifications 1 Electrical Specifications System Unit 192 Electrical Specifications 17 inch Monitor 192 Electrical Specifications 20 inch Monitor 193 Environmental Specifications 194 Tables x
117. moyen que ce soit sans l autorisation pr alable et crite de Sun et de ses bailleurs de licence s il y ena Des parties de ce produit pourront tre deriv es du syst me UNIX licenci par Novell Inc et du syst me Berkeley 4 3 BSD licenci par l Universit de Californie UNIX est une marque enregistr e aux Etats Unis et dans d autres pays et licenci e exclusivement par X Open Company Ltd Le logiciel d tenu par des tiers et qui comprend la technologie relative aux polices de caract res est prot g par un copyright et licenci par des fournisseurs de Sun Sun Sun Microsystems le logo Sun et Solaris sont des marques d pos es ou enregistr es de Sun Microsystems Inc aux Etats Unis et dans d autres pays Toutes les marques SPARC utilis es sous licence sont des marques d pos es ou enregistr es de SPARC International Inc aux Etats Unis et dans d autres pays Les produits portant les marques SPARC sont bas s sur une architecture d velopp e par Sun Microsystems Inc Les utilisateurs d interfaces graphiques OPEN LOOK et Sun ont t d velopp s de Sun Microsystems Inc pour ses utilisateurs et licenci s Sun reconna t les efforts de pionniers de Xerox Corporation pour 18 recherche et le d veloppement du concept des interfaces d utilisation visuelle ou graphique pour l industrie de l informatique Sun d tient une licence non exclusive de Xerox sur l interface d utilisation graphique cette licence couvrant
118. nd installing the SCSI data cable varies depending on the chassis The following sections provide SCSI data cable removal and installation for each chassis type Removing the SCSI Data Cable SunCD 2Plus Drive Type Chassis Remove power from the system See Removing Power from the System on page 45 SPARCstation 20 Service Manual July 1996 2 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 3 Disconnect the following cables from the system board FIGURE 8 29 Diskette data cable optional SCSI data cable DC power connector Speaker LED cable O e OOS Metal cable guide Diskette data cable SCSI data cable gt E cee ary Nee lt lt DC power connector Speaker LED cable eal System board Note Figure illustrates SunCD 2Plus drive type 1 inch drive chassis only FIGURE 8 29 Internal Cables and DC Power Connector SunCD 2Plus Drive Type Chassis Chapter 8 Removing and Installing Subassemblies 89 4 Remove any SBus cards See Removing an SBus Card on page 152 5 Loos
119. nectors 00000000000 130 14 0 00000000 0 0 0 25 FIGURE 0 4 Serial Ports A and B Connector TABLE 0 4 Serial Ports A and B Connector Pin Assignments Pin Function VO Level Signal Description 1 N C None GND Not connected 2 Xmit Data A O RS 232 423 Xmit data A transmit data port A 3 Rec Data A I RS 232 423 Receive data port A 4 RTS A O RS 232 423 Request to send port A 5 CTS A I RS 232 423 Clear to send port A 6 DSR A I RS 232 423 Data set ready port A 7 Ground GND Signal ground 8 DCD A I O RS 232 423 Data carrier detect port A 9 N C None GND Not connected 10 N C None GND Not connected 11 DTR B I RS 232 423 Data terminal ready port B 12 DCD B I RS 232 423 Data carrier detect port B 13 CTS B I RS 232 423 Clear to send port B 14 Xmit Data B O RS 232 423 Transmit data port B 210 SPARCstation 20 Service Manual July 1996 TABLE 0 4 Serial Ports A and B Connector Pin Assignments Continued Pin Function 1 0 Level Signal Description 15 TRxC A I RS 232 423 Receive transmit clock port A pullup 16 Rec Data B I RS 232 423 Receive data port B 17 RTxC A I RS 232 423 Secondary transmit clock receive port 18 TRxC B I RS 232 423 Receive transmit clock port B pullup 19 RTS B O RS 232 423 Request to send port B 20 DTR A 0 RS 232 423 Data terminal ready port A 21 N C None GND Not connected 22 N C None GND Not connected 23 N C None GND Not connected 24 TxC A O RS 232 423 Transmit clock por
120. ness and SCSI data cable as follows FIGURE 8 39 a Route the end of the DC power harness with connectors P1 and P3 through the sheetmetal opening in the drive bracket Note Be sure the tie wrap markers are in the proper position beneath the metal cable guides SPARCstation 20 Service Manual July 1996 10 b Route the DC power harness through the metal cable guides c Route the SCSI data cable through the metal cable guides d Press the cable down between the drive bracket and the plastic card guide Connect P3 to the SCSI backplane FIGURE 8 39 Install the power supply See Installing the Power Supply on page 58 Install the diskette drive if it was removed earlier See Installing a Diskette Drive on page 132 Slide the system board completely into the chassis Tighten the two captive screws that secure the system board back panel to the chassis FIGURE 8 37 Connect the diskette data cable SCSI data cable DC power connector and speaker LED cable to the system board FIGURE 8 36 Install any SBus cards See Installing an SBus Card on page 156 Install the CD ROM drive See Installing a CD ROM Drive on page 124 Detach the wrist strap and replace the cover See Chapter 7 Power on the system See Turning On the Power on page 47 Removing the DC Power Harness SunCD 4 Drive Type Chassis Remove power from the system See Removin
121. nnected securely The terminator must be connected to the last physical device in the SCSI chain c Check the SCSI cables to ensure there are no bent pins d If after checking the previous causes the problem is still not identified replace the disk drive e If the problem still occurs after replacing the drive replace the system board f If replacing the disk drive and the system board does not correct the problem replace the internal disk drive cable assembly TABLE 4 3 Troubleshooting Disk Drive Errors Symptom Corrective Action Read write or parity error reported by the operating system or applications Drive fails to boot or does not respond to commands Slow disk drive response Replace the disk drive indicated by the failure message The operating system identifies the Bottom drive SCSI address 3 as 500 or 606360 and the top drive SCSI address 1 as 501 or cOt1d0 SCSI controller or disk may be defective See Power On Does Not Succeed on page 29 or Chapter 9 The SCSI terminator is missing if external devices are connected or the drive is defective Make sure that each SCSI device on the SCSI bus is assigned a unique address Do not use SCSI address 7 for any device because it is reserved for the SCSI controller If several SCSI devices are connected to the same SCSI bus and if some of these devices are fast SCSI devices such as the external 1 05 Gbyte disk drive install an FSBE S SC
122. nstalled CPU_ 2 AAAKKAK NOT instal led 2 x CPU_ 3 KEEKEEKE NOT installed gt gt gt gt gt Power On Self Test POST is running lt lt lt lt lt Setting Up a tip Connection The tip connection allows the use of a shell window on the Sun Workstation as a terminal to the system being tested In setting up a tip connection serial port A is used to connect to another Sun Workstation either the same type of SPARC system or a different type of Sun Workstation or server system The tip connection uses the SunOS to help in working with the OpenBoot PROM To set up a tip connection proceed as follows 1 Connect the SPARCstation 20 serial port A to another Sun Workstation serial port using a serial connection cable This connection is made with a 3 wire null modem cable Connect wires 3 2 2 3 and 7 7 2 At the other Sun Workstation add the following line to the etc remote file Chapter 19 Note The example shows connection to serial port A ttya To use serial port B on the other Sun Workstation enter tt yb hardwire dv dev ttya br 9600 el C S Q U D ie 3 0e D ote For SunOS 4 1 3_V1 Rev B and later hardwire dv dev term a br 9600 el1 C S Q U D ie S 0e D Note For SunOS 5 3 and later 3 At the system prompt type the following hostname tip hardwire connected The shell window is now a tip window direc
123. nstalling a Single Wide MBus Module Caution A module must be installed in MBus module slot 0 lower slot or the system will not work 3 Insert the back edge of the module between the metal lower and plastic upper tabs on the back panel 4 Hold the MBus module corners and press down firmly until the module is seated into the slot 146 SPARCstation 20 Service Manual July 1996 Note Be sure the MBus module is fully inserted into the MBus slot If it is not the card retainers may not lock over the edge of the module properly Caution Excessive force may bend or damage the pins 5 Lock the retainer arms over the edge of the MBus module FIGURE 11 5 MBus module single wide MBus module retainers SBus card retainers FIGURE 11 5 MBus Module and SBus Card Retainers Removing a Double Wide MBus Module Caution Hot surface Avoid contact Surfaces are hot and may cause personal injury if touched 1 Remove power from the system See Removing Power from the System on page 45 2 Remove the cover and attach the wrist strap See Chapter 7 Chapter 11 System Board and Component Replacement 7 148 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Unlock the MBus module retainers and the SBus card reta
124. o check for a video output failure Note This procedure is valid for primary graphics card only Check that the power cord is connected to the monitor and to the power supply outlet Verify that the wall outlet is supplying AC power to the monitor and the power supply Use a VOM volt ohm milliammeter Verify that the video cable connection is secure between the monitor and the system video output port Use a VOM to perform the continuity test on the video cable If the power cord and video cable connections are good and no video output occurs reseat the video card for the monitor The video card may be installed in one of the four SBus slots or in a memory slot if it isa VSIMM VSIMMs can be installed in one or two of the memory slots Slot J0304 is the default slot for the VSIMM in SPARCstation 20 systems with the SX graphics option This enables video output on the monitor connector on the system back panel Slot J0305 may be used for 8 DSIMM VSIMM or NVSIMM in SPARCstation 20 systems An auxiliary video board AVB must be installed to enable video output from a VSIMM in slot J0305 28 SPARCstation 20 Service Manual July 1996 5 If the monitor power supply is internally fused check the fuse Power On Does Not Succeed To check for a power on failure 1 Remove the DC power from the system by pushing the back panel power switch to the standby position 2 Check that the power cord
125. oard test memory test all watch clock watch net watch aui watch tpe watch net all Tests internal or external SCSI disks that have self test diagnostic programs on the drive controller Performs a self test diagnostic on the CD ROM drive Tests the SCSI tape drive by executing the drive self test program tape and tape 0 are the first tape drive tape 1 is the second tape drive Tests serial ports Outputs an alphanumeric test pattern on the system serial ports Executes the keyboard self test four keyboard LEDs should flash on once and the message Keyboard Present is displayed Tests main memory Tests all system devices such as SBus cards with built in test programs hard disks tapes and CD ROMs are not tested Displays seconds from the NVRAM TOD chip Monitors Ethernet packets on the auto selected Ethernet cable connected to the system Monitors Ethernet packets 10Base5 Thicknet on the Ethernet cable connected to the system Monitors Ethernet packets 10Base_T twisted pair Ethernet on the Ethernet cable connected to the system Monitors Ethernet packets on all Ethernet interfaces installed in the system The disk drive must be spinning before this test is executed enter a boot disk alias command to cause the drive to spin up The CD ROM drive must be set to SCSI address 6 and have a CD inserted The tape drive must be set to SCSI address 4 tape 0 or address 5 tape 1
126. on 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 Caution Hot surface Avoid contact Surfaces are hot an may cause personal injury if touched AC Terminal power outlet to which alternating current or voltage may be applied ON Applies DC power to the system STANDBY Removes DC power from the system FIGURE 5 1 Symbols Used in This Manual System Precautions Observe all safety precautions and ensure compliance with skill level requirements certification and all applicable local and national laws Procedures contained in this document must be performed by trained maintenance providers Only people who have been trained by the Sun Microsystems training facilities or by Sun Microsystems affiliates and have been certified as required by local and national laws are considered qualified Caution Before beginning a service task carefully read each of the procedures in this manual If similar operations on comparable equipment have not been performed do not attempt to perform these procedures Chapter5 Safety and Tools Requirements 1 Lithium Battery Caution On SPARCstation 20 system boards there is a lithium battery molded into the real time clock SGS No MK48T18 Batteries are not customer replaceable parts They
127. on of Selected FRUs 185 A Product Specifications 191 Physical Specifications 191 Electrical Specifications 192 Environmental Specifications 194 B Functional Description 195 System Overview 195 System Architecture 195 System Board 196 SBus Card 7 MBus Module 198 MBus to SBus Interface 198 Memory 198 SBus to SCSI Ethernet and Parallel Interfaces 202 SBus to External Bus Interface 203 Clock Chip 4 C System Board Connector Pinouts 205 Parallel Connector 205 AUI Connector 207 Keyboard and Mouse Connector 209 Serial Ports A and B Connector 210 Twisted Pair Ethernet Connector 211 SCSI Connector 212 viii SPARCstation 20 Service Manual July 1996 13W3 Connector 215 Audio Ports 216 Headphone Connector 217 SCSI Addresses 219 Disk Drives 219 Selected On Board Diagnostics 221 test device alias test device pathname 221 test all 222 watch clock 223 watch net watch aui watch tpe watch net all 224 probe scsi probe scsi all 226 test memory 227 power off 228 module info 228 Glossary 229 Contents ix x SPARCstation 20 Service Manual July 1996 GURE 1 1 GURE 1 2 GURE 1 3 GURE 1 4 GURE 2 1 GURE 3 1 GURE 3 2 GURE 4 1 GURE 4 2 GURE 4 3 GURE 5 1 GURE 6 1 GURE 6 2 GURE 7 1 GURE 7 2 GURE 7 3 GURE 7 4 GURE 7 5 GURE 7 6 Figures SPARCstation 20 System 2 SPARCstation 20 System Exploded View 3 SPARCstation 20 System Overhead Interior View 4 SPARC
128. onents The soldered pins can be damaged or shorted by the probe point Chapter5 Safety and Tools Requirements 3 44 SPARCstation 20 Service Manual July 1996 CHAPTER 6 Power On and Off Removing Power from the System To remove power from the system Caution Failure to terminate the operating system can cause data loss Note Before turning off the system power terminate the operating system 1 Notify users that the system is going down if networked system 2 Back up the system files and data 3 Shut down the system 4 Ensure that the power is turned off to the monitor and all peripherals connected to the system 5 Remove DC power from the system by pressing the power on standby switch on the back panel FIGURE 6 1 45 Osso Q O 6 Standby FIGURE 6 1 Standby Switch Caution When the power on standby switch is pressed and the AC power cord remains connected to a power receptacle hazardous AC voltage is present in the power supply primary When power is removed from the power supply the power supply automatically returns to that state when power is restored even if the system power on standby switch or the keyboard power on key are not touched Before servicing the power supply press the standby switch prior to disconnecting the AC power c
129. operly Other DSIMMs may be installed in any available slot Chapter 11 System Board and Component Replacement 3 164 Slot 10304 is reserved for the single factory installed VSIMM with the SX graphics option If no VSIMM is present the slot may be used for a DSIMM Slot 0305 may be used for 8 DSIMM VSIMM or NVSIMM Note Slot J0201 must be used for the first 64 Mbyte DSIMM when installing a combination of 64 Mbyte 32 Mbyte and 16 Mbyte DSIMMs If a 16 Mbyte or 32 Mbyte DSIMM is previously installed in slot 10201 it must be removed from slot 10201 and installed in another unused DSIMM slot Caution The NVSIMM is specifically designed to operate in the SPARCstation 20 system Do not remove a NVSIMM from a different Sun system and install it in a SPARCstation 20 system The SPARCstation 20 NVSIMM can only be used on systems executing the Solaris 2 3 SunOS 5 3 operating environment or later and PrestoserveTM 2 4 1 or later The SPARCstation 20 VSIMM can only be used on systems executing the Solaris 2 3 SunOS 5 3 or later operating environment Remove the SIMM from the protective packaging and place it on an antistatic surface Hold the SIMM edges and insert it into the SIMM plastic guides If installing a DSIMM position the DSIMM with the key notch near the ejection lever FIGURE 11 27 Key notch FIGU
130. ord Note The AC power cord provides the grounding path to safely discharge static electricity Take note where each cord and cable attaches to the system unit 46 Restarting the System While Troubleshooting When troubleshooting a problem and the POST power on messages need to be viewed Connect a terminal to serial port A or set up a tip connection to another workstation If necessary see Setting Up a tip Connection on page 19 Turn the power on as follows a SCSI peripheral farthest from the system peripheral with the SCSI terminator attached b SCSI peripheral closest to the system peripheral directly connected to the system SPARCstation 20 Service Manual July 1996 c Other peripherals such as printers d Terminal or graphics monitor if tip connection is used e System unit CPU 3 Initiate the POST diagnostic mode by pressing and holding the keyboard Stop L1 and D keys 4 Watch the screen for any POST error messages At the conclusion of testing the OpenBoot PROM automatically configures the system omitting any devices that have failed diagnostics After POST ends the system boots using the new configuration Note POST does not test drives or SBus cards To test these devices run OpenBoot PROM diagnostics before the system has booted Appendix E Selected On Board Diagnostics describes using the test command to test SBus cards and drives Also refer to Open
131. ort jumpers J0801 and J0802 on the system board before installation The jumpers are preset at the factory as shown in FIGURE 11 39 Chapter 11 System Board and Component Replacement 173 Note Leave the clock speed jumper set at 40 50 MHz for optimum performance If the clock speed jumper is changed to the 40 MHz position the MBus will only operate at 40 MHz and the SBus will only operate at 20 MHz I Clock speed A RS 232 jumper preset B RS 423 preset FIGURE 11 39 System Board Jumper Settings The serial port jumpers are preset to RS 423 mode but are changeable to RS 232 mode for connection to an X 25 network in Europe or Australia To change the setting of serial port jumpers J0801 and J0802 from the RS 423 mode position B to the RS 232 mode position A refer to FIGURE 11 39 and proceed as follows 1 Using needlenose pliers remove the 2 pin shunt from position B 2 Using needlenose pliers replace the 2 pin shunt to position A 174 SPARCstation 20 Service Manual July 1996 Installing the System Board Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface
132. ound 10 Ground None GND Ground 11 Ground None GND Ground 12 Ground None GND Ground 13 Ground None GND Ground 14 Ground None GND Ground 15 Ground None GND Ground 16 Ground None GND Ground 17 Ground None GND Ground 18 Ground None GND Ground 19 Ground None GND Ground 20 Ground None GND Ground 21 Ground None GND Ground 22 Ground None GND Ground 23 Ground None GND Ground 24 Ground None GND Ground 25 Ground None GND Ground 26 sd0 1 O TTL SCSI data bit 0 27 sdl 1 O TTL SCSI data bit 1 Appendix C System Board Connector Pinouts 213 214 TABLE 0 6 SCSI Connector Pin Assignments Continued Pin Function 1 0 Level Signal Description 28 sd2 I O TTL SCSI data bit 2 29 sd3 1 O TIL SCSI data bit 3 30 sd4 1 O TTL SCSI data bit 4 31 sd5 1 O TTL SCSI data bit 5 32 sd6 1 O TTL SCSI data bit 6 33 sd7 1 O TTL SCSI data bit 7 34 sdp I O TTL SCSI data parity 35 Ground None GND Ground 36 Ground None GND Ground 37 Ground None GND Ground 38 Termpower I O TTL Termination voltage 39 Ground None GND Ground 40 Ground None GND Ground 41 atn O TTL Attention 42 Ground None GND Ground 43 bsy O TTL Busy 44 ack 0 TTL Acknowledge 45 rst O TTL Reset 46 msg 0 TTL Message 47 sel O TTL Select 48 cat O TTL Control data SPARCstation 20 Service Manual July 1996 TABLE 0 6 SCSI Connector Pin Assignments Continued Pin Function 1 0 Level Signal Description 49 req 0 TTL Request 50 io O TTL Input output
133. performance A cache is a small fast memory between the microprocessor and main memory See printed circuit board Central processing unit Digital to analog converter Glossary 9 default disk disk drive diskette diskette drive DMA DRAM DSIMM Ecache ECC Ethernet Forth Forth Toolkit frame buffer board IC ID keyboard keyboard port LANCE LED location 230 A preset value that is assumed to be correct unless changed by the user A round platter or set of platters coated with magnetic medium and organized into concentric tracks for storing data The mechanism that rotates a disk A removable disk of magnetic medium for storing software and information A device that reads and writes diskettes If installed the diskette drive access is located on the right side of the SPARCstation 20 system unit Direct memory access Dynamic random access memory DRAM single in line memory module A small printed circuit card that contains DRAM chips External cache is a cache that is located external to the microprocessor See cache Error correcting code A type of network hardware that allows communications between systems connected together by transceiver taps transceiver cables and a coaxial cable A high level programming language A major feature of Forth is that user defined operators can be used as primitives An interactive command interpreter based upon the Forth programm
134. pixel clock generation circuitry on the VSIMM The SPARCstation 20 uses 60 nanosecond VRAMs on the VSIMM VRAM densities are supported by the SMC and are listed in TABLE B 3 FIGURE B 3 illustrates the VSIMM memory system TABLE 2 3 VRAM Densities VRAM Density VRAMs VSIMM Capacity Type 1 Mbit 256K x 4 32 4 Mbyte 128 bit VRAM 2 Mbit 256K x 8 32 8 Mbyte 256 bit VRAM DATA 128 ADDR 11 SIMM slot 8 SMC CONTROL DSIMM DSIMM DSIMM DSIMM DSIMM FIGURE 8 3 VSIMM Memory System Appendix Functional Description 201 202 NVSIMM The NVSIMM provides an interface to the Prestoserve software The NVSIMM furnishes a battery backed up memory that is used as a cache for disk drive access Operating conjointly with the Prestoserve software the NVRAM accelerates both NFS and UFS disk access The maximum available NVSIMM memory capacities based upon possible memory allocations is 2 Mbytes SBus to SCSI Ethernet and Parallel Interfaces The SBus to SCSI Ethernet and parallel interface MACIO ASIC provides the interface between the SBus and the following a SCSI Thick AUI Ethernet Twisted pair Ethernet TPE m Parallel port The MACIO ASIC integrates three functions Direct memory access DMA Local area network control for Ethernet LANCE Fast SCSI bus interface FIGURE B 4 illustrates a functional block diagram of the MACIO ASIC SPARC
135. product specifications for the SPARCStation 20 system and is divided into three parts Physical specifications Electrical specifications Environmental specifications Physical Specifications TABLE A 1 lists the physical specifications for the SPARCStation 20 system TABLE A 1 Physical Specifications Height inches Width inches Depth inches Net Weight Ibs Component mm mm mm kg System unit 3 07 78 16 40 417 16 10 409 27 00 12 70 Keyboard 1 70 44 20 10 510 7 20 182 3 50 1 60 Mouse 2 00 50 4 00 100 3 00 80 0 30 0 14 Color monitor 16 40 414 16 00 406 17 70 450 49 50 22 50 17 inch Color monitor 18 54 471 18 70 475 19 49 495 69 50 31 50 20 inch 191 Electrical Specifications TABLE A 2 lists the electrical specifications for the system unit TABLE A 3 lists the electrical specifications for the 17 inch monitor TABLE A 4 lists the electrical specifications for the 20 inch monitor TABLE A 2 Electrical Specifications System Unit Parameter Nominal frequencies Nominal voltage range Maximum current Maximum VA rating Maximum power consumption Heat output without monitor Specification 50 Hz or 60 Hz 100 120 VAC or 200 240 VAC 2 A at 100 V system unit 1 A at 200 V system unit 4 A at 100 V auxiliary output 2 A at 200 V auxiliary output 6 A at 100 V total maximum 3 A at 200 V total maximum 200 VA 350 W 683 BTUs hr TABLE A 3 Elec
136. quiry command to all SCSI devices connected to the built in SCSI port and to all the SCSI host adapters installed in the system The probe scsi all command returns the following information SCSI host adapter address in the system device tree SCSI device identification data SCSI address or target ID unit number and SCSI device information SPARCstation 20 Service Manual July 1996 CODE EXAMPLE E 7 identifies the probe scsi command output message CODE EXAMPLE E 8 identifies the probe scsi all command output message CODE EXAMPLE E 7 probe scsi Command Output Message ok probe scsi Target 3 Unit 0 Disk SEAGATE 511480 SUN04245828 Copyright c 1991 Seagate All rights reserved CODE EXAMPLE E 8 probe scsi all Command Output Message ok probe scsi all iommu f e0000000 sbus f 60001000 861 81000 esp 1 80000 Target 2 Unit 0 Disk SEAGATE ST41600N SUN1 3G00286965 Copyright c 1991 Seagate All rights reserved iommu f e0000000 sbus f e0001000 espdma f 400000 esp f 800000 Target 3 Unit 0 Disk SEAGATE ST1480 SUN04245828 Copyright c 1991 Seagate All rights reserved test memory The test memory command tests the main memory if the system diag switch parameter is set to true If the system diag switch parameter is set to false the test memory command verifies the memory according to a user specified number of megabytes to be examined When the test memory
137. r components 188 overview 139 removing 171 173 SIMM slot locations 36 test 31 system board replacement 143 system LED location 24 T tape drive 7 terminals speaker 65 terminator SCSI 34 test 221 all 13 cdrom 13 continuity 28 disk 13 disk0 13 disk1 13 disk2 13 disk3 13 drive 47 drives 47 floppy 12 keyboard 13 loopback 12 memory 13 module info 14 net 12 net aui 12 net tpe 12 POST 20 power supply 29 SBus cards 47 screen 12 scsi 12 supported 12 system board 31 tape 13 tape0 13 tapel 13 ttya 13 ttyb 13 test command output message 222 test all 222 test all command output message 222 test memory 227 thick ethernet 224 tip window 20 tip connection setting up 19 tips troubleshooting 27 tools diagnostic 11 troubleshooting disk drive errors 34 overview 9 procedures 27 tips 27 tty SunVTS 16 turning on power 47 twisted pair Ethernet TPE 224 twisted pair Ethernet connector 211 pin assignments 212 type 5 keyboard key LEDs 25 typical abbreviated POST error free message 19 POST error messages 23 POST progress message 18 typographic conventions xxii U uniprocessor module info command output message 228 UNIX commands xxiii user interface SunVTS 15 V video output failure 28 port 28 view back panel connectors 4 rear of system 4 system interior 3 voltage check 29 output 29 VRAM densities 201 VSI
138. r on the system See Chapter 6 Removing the Diskette Drive Cable SunCD 4 Drive Type Chassis Remove power from the system See Removing Power from the System on page 45 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Remove the CD ROM drive See Removing a CD ROM Drive on page 123 Chapter 8 Removing and Installing Subassemblies 111 4 Remove the diskette drive See Removing a Diskette Drive on page 127 5 Disconnect the diskette data cable from the system board FIGURE 8 46 6 Carefully note the diskette drive cable routing Remove the diskette drive cable from the system chassis skette data__ connector Note Figure illustrates SunCD 4 drive type 1 6 inch drive chassis only FIGURE 8 46 System Board Cable Routing SunCD 4 Drive Type Chassis Installing the Diskette Drive Cable SunCD 4 Drive Type Chassis an antistatic wrist strap and use an ESD protected mat Store ESD sensitive Caution Use proper ESD grounding techniques when handling components Wear components in antistatic bags before placing it on any surface 112
139. rd outlet when replacing drives SIMMs chips or the system board Leaving the AC power cord plugged into the wall outlet provides a grounding path for the wrist strap which you must wear while servicing the system Remove DC power from the system by pressing the Standby switch before unplugging a working unit or connecting a replacement unit NOTE TIf not set to standby before being unplugged the power supply will turn on automatically when it is plugged in again even if the power on standby switch or keyboard buttons are not touched Wear a grounded wrist strap when handling printed circuit boards drives or other components such as SIMMs An approved antistatic mat when used with a wrist strap provides protection from static damage The mat also cushions and protects small parts that are attached to printed circuit boards Chapter 12 lists the part number of the mat Handle a printed circuit board by the edges only Store a board in an antistatic bag Replace the cover after performing service on the system Install filler panels in all unused SBus and MBus slots Openings on the back panel reduce the cooling capability of the system Do not touch the metal heat sinks on the MBus module or the system board The heat sinks can be hot enough to cause personal injury Symbols The following symbols are used throughout this manual 40 SPARCstation 20 Service Manual July 1996 2 D lt lt D Cauti
140. re 6 restarting system while troubleshooting 46 RS 423 mode 174 5 safety 41 precautions 39 requirements 39 sample listing full diagnostic test mode 21 SBus to external bus interface 203 to SCSI interface 202 SBus card 152 197 adapter bracket removing 156 back plate screws 153 washers 153 backplane screws 158 waskers 158 extractor 154 extractor removing 155 installing 156 removing 152 retainers 147 153 single wide 155 test manually 47 screw captive 56 58 SCSI address conventions 219 addresses 219 backplane 87 117 DC power connector 90 connectors 102 SCSI data 90 102 cable 84 connector 212 pin assignments 212 controller verifying defective 33 data cable 88 defective controller 33 device 14 220 target ID 220 terminator 34 SCSI backplane removing 84 SEC ASIC 203 functional block diagram 204 selected FRUs 186 serial cable 19 port jumper RS 232 174 RS 423 174 jumpers 173 ports A and B connector 210 serial port jumper 174 setting floppy disk drive switch 132 setting up tip connection 19 shell prompts xxiv SIMM address space 35 determining failed 35 ejection levers 163 installation sequence 35 location 35 physical address 35 removing 161 slot 35 slot layout 35 slot locations 162 video 6 SIMM slot installation sequence 36 layout 36 single connector drive 117 hard disk drive 119 single wide MBus module installing 1
141. rnal options of the Part 2 Troubleshooting Chapter 2 Troubleshooting Overview Chapter 3 Power On Self Test POST Chapter 4 Troubleshooting Procedures SPARCstation 20 system Describes how to diagnose a problem and run diagnostic tests Describes the execution of POST and provides troubleshooting errors displayed during POST Provides corrective actions to generalized hardware symptom casualty Preface xix TABLE P 1 Part Number Title Document Organization Continued Chapter Number Title Description Part 3 Preparing for Service Chapter 5 Safety and Tool Requirements Chapter 6 Power On and Off Explains how to work safely when servicing the SPARCstation 20 system Provides step by step procedures to power on and power off the SPARCstation 20 system Part 4 Subassembly Removal and Replacement Chapter 7 Internal Access Chapter 8 Removing and Installing Subassemblies Chapter 9 Storage Devices Provides step by step procedures to remove the SPARCstation 20 system cover attach the wrist strap and replace the cover Provides step by step procedures to remove and install major subassemblies Provides step by step procedures to remove and replace storage devices Part 5 System Board Part 6 Illustrated Parts Breakdown Chapter 10 System Board Overview Chapter 11 System Board an
142. s a switch on the side of the drive set the diskette drive switch all the way to the rear FIGURE 9 16 Note This switch is not present on all models b If the diskette drive does not have a switch on the side of the drive it has a microswitch SW4 on the printed circuit board PCB side of the drive Set SW4 to the 0 position by pressing it towards the rear of the diskette drive FIGURE 9 16 132 SPARCstation 20 Service Manual July 1996 PCB side of drive Diskette drive microswitch FIGURE 9 16 Setting the Diskette Drive Microswitch c Locate the two wire diskette drive power cable labeled P4 Move the SCSI disk cable and the CD ROM drive power cable away from the diskette drive opening FIGURE 9 17 and FIGURE 9 17 SCSI disk cable CD ROM drive power cable FIGURE 9 17 Moving the SCSI Disk Cable and the CD ROM Drive Power Cable Chapter9 Storage Devices 3 Power cable P4 top surface FIGURE 9 18 Diskette Drive Power Cable P4 3 Lift the diskette drive data cable and the diskette drive power cable up Lower the diskette drive into position Push the diskette drive forward to fully seat in the diskette drive mounts FIGURE 9 19 Diskette drive Diskette drive power cable Diskette drive data cable N Diskette drive mounts FIGURE 9 19 Installing the Diskette Drive Note The diskette drive data cable must be positioned between the diskette drive and
143. s and peripheral equipment The SunDiag system exerciser verifies that the system is functioning properly The SunDiag system exerciser program is located as follows usr diag sundiag Solaris 1 1 x opt SUNWdiag bin Solaris 2 x If the SunDiag system exerciser is not on the system hard disk or server it can be loaded from either a CD or from a network server for more information see theSunDiag User s Guide If SunDiag system exerciser passes the system is operating properly If SunDiag system exerciser fails error messages are displayed indicating the part of the system that failed Note If a SunDiag system exerciser error message is not descriptive enough execute the POST for a more descriptive explanation see Chapter 3 14 SPARCstation 20 Service Manual July 1996 Sun VTS The SunVTS software executes multiple diagnostic hardware tests from a single user interface and is used to verifying configuration and functionality of most hardware controllers and devices SunVTS operates primarily from the OpenWindows user interface allowing test parameters to be set quickly and easily while a diagnostic test operation is being performed The SunVTS operation is provided in the documents listed in TABLE 2 4 These documents furnish detailed information about SunVTS and are available on the Solaris on Sun Hardware AnswerBook The Solaris on Sun Hardware AnswerBook is provided on the SMCC Updates CD for t
144. s exposed to allow fan connection 80 SPARCstation 20 Service Manual July 1996 Fan DC power connector CD ROM drive DC power connector Fan two wire connector Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 23 Connecting the Fan DC Power Connector Chapter 8 Removing and Installing Subassemblies 81 Fan DC power connector Cable trough CD ROM drive DC power connector Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 24 Routing Excess Cables in Cable Trough 4 Connect the two pin power connector to the fan assembly DC power connector FIGURE 8 25 Note Connectors and terminals are keyed to ensure proper connection 5 Detach the wrist strap and replace the cover See Chapter 7 6 Power on the system See Turning On the Power on page 47 82 SPARCstation 20 Service Manual July 1996 Fan assembly Fan connector DC power connector Note Cable restraints and SCSI data cables are not illustrated FIGURE 8 25 Fan DC Power Connector SCSI Backplane To remove and install the SCSI backplane proceed as follows Chapter 8 Removing and Installing Subassemblies 3 84 Removing the SCSI Backplane Note The SCSI backplane is a printed circuit board located in the drive bracket area of the chassis A bracket and two screws secure the SCSI backplane to the vented sheetmetal chassis One or two single conne
145. se an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Replace the SCSI backplane bracket as follows FIGURE 8 27 a Position the plastic SCSI backplane bracket so that the bracket tabs face the vented sheetmetal chassis b Slide the right side of the SCSI backplane through the sheetmetal slot in the drive bracket Chapter 8 Removing and Installing Subassemblies 7 Note The two plastic legs on the right side of the SCSI backplane fit into the chassis sheetmetal slots c Align the tabs on the left side of the SCSI backplane bracket with the sheetmetal slots near the chassis corner d Firmly press the tabs into the chassis slots Note Check to ensure that the bracket assembly snaps securely into place and that the two legs are in the chassis sheetmetal slots Connect the SCSI data connector and the DC power connector clip into the SCSI data socket and the DC power socket respectively FIGURE 8 26 Replace the hard disk drive s See Installing a Hard Disk Drive on page 120 Detach the wrist strap and replace the cover See Chapter 7 Power on the system See Turning On the Power on page 47 88 SCSI Data Cable The SPARCstation 20 system is configured with one of two chassis types Achassis that supports the SunCD 2Plus drive 1 inch drive A chassis that supports the SunCD 4 drive 1 6 inch drive Removing a
146. station 20 Service Manual July 1996 MACIO ASIC LANCE Clock lt lt TPE a gt chip DMA pe AU Fast controller Parallel port p gt Parallel i port af 5 FIGURE 8 4 MACIO ASIC Functional Block Diagram SBus to External Bus Interface The SBus to external bus interface SEC ASIC provides the interface between the SBus and the external bus The external bus connects to the following Serial port chips 2 Audio chip Diskette drive controller 4 Mbit EEPROM NVRAM TOD chip LED interface One of the serial port chips provides serial ports A and B The second serial port chip provides the keyboard and mouse port Line drivers interface the two serial port chips to the serial ports FIGURE B 5 illustrates a functional block diagram of the SEC ASIC Appendix Functional Description 203 204 SEC ASIC Keyboard a mouse chip Keyboard mouse Serial ports A chip Serial ports A B EEPROM E NVRAM TOD A Diskette drive lt i _ chip 4 Diskette drive lt q p LED interface FIGURE B 5 SEC ASIC Functional Block Diagram Clock Chip The clock chip provides the MBus and SBus clocks for the system board and the VSIMMs There are 14 MBus clocks generated by the clock chip one for each receiver Four MBus clock receivers for each of two MBus modules
147. station 20 System Unit Rear View 5 Default Boot Mode OpenBoot PROM Version 2 14 or Later 10 System LED Location 24 Type 5 Keyboard Key LEDs 25 Power Supply Connector Pinouts 30 Power Supply and Power Supply Connector Location 31 System Board SIMM Slot Locations 36 Symbols Used in This Manual 41 Standby Switch 46 Power On Switch 48 Lock Block Screw and Corner Screw 49 Removing the Cover 50 Grounding Wrist Strap to Power Supply 1 Replacing the Cover 52 Lock Block 52 Back Panel Corner Screw 53 Figures xi xii FIGURE 8 1 FIGURE 8 2 FIGURE 8 3 FIGURE 8 4 FIGURE 8 5 FIGURE 8 6 FIGURE 8 7 FIGURE 8 8 FIGURE 8 9 FIGURE 8 10 FIGURE 8 11 FIGURE 8 12 FIGURE 8 13 FIGURE 8 14 FIGURE 8 15 FIGURE 8 16 FIGURE 8 17 FIGURE 8 18 FIGURE 8 19 FIGURE 8 20 FIGURE 8 21 FIGURE 8 22 FIGURE 8 23 FIGURE 8 24 FIGURE 8 25 FIGURE 8 26 FIGURE 8 27 FIGURE 8 28 Attaching a Wrist Strap to Back Panel and Removing the Power Supply 57 Power Supply and DC Power Harness 8 Power Supply Captive Screws 59 Connecting the DC Power Connector to the System Board 59 Speaker LED Cable Detail 61 LED Light Pipe Detail 62 Speaker LED Cable 63 Speaker Cover Detail 65 Speaker Connectors 66 Disconnecting the Fan DC Power Connector 68 Removing the Fan 69 Fan Assembly 0 Mounting the Fan Assembly 1 Securing the Fan Assembly Using the Fan Installation Tool 72 Connecting the Fan Assembly
148. supply metal casing 50 SPARCstation 20 Service Manual July 1996 Wrist strap FIGURE 7 3 Grounding Wrist Strap to Power Supply Replacing the Cover To replace the cover 1 Remove the wrist strap 2 Grasp the cover by the front and rear edges FIGURE 7 4 Chapter 7 Internal Access 1 Rear edge Cover Z Front edg FIGURE 7 4 Replacing the Cover 3 Align the cover hinge tabs with the chassis tab slots on the bottom front of the system Ensure that the tabs are locked into the chassis slots 4 Lower the cover onto the chassis FIGURE 7 4 5 Replace the lock block FIGURE 7 5 FIGURE 7 5 Lock Block 52 SPARCstation 20 Service Manual July 1996 Caution Do not use a power driver to tighten the back panel screws Do not overtighten the back panel screws 6 Tighten the screw on the back panel corner and secure the cover FIGURE 7 6 Corner screw 999069 KEY 16 790000 FIGURE 7 6 Back Panel Corner Screw Chapter 7 Internal Access 3 54 SPARCstation 20 Service Manual July 1996 CHAPTER 8 Removing and Installing Subassemblies This chapter contains procedures for removing and installing the major subassemblies of the system unit The following is the list of the major subassemblies Power Supply To remove and install the power s
149. system board MBus module two maximum SBus card four maximum Note A maximum of four SBus cards may be installed unless optional VSIMM AVB is installed in which case a maximum of three SBus cards may be installed Main Memory DSIMM eight maximum VSIMM two maximum in conjunction with up to six DSIMMs NVSIMM one maximum in conjunction with a second VSIMM and five DSIMMs Note Installing a second VSIMM and NVSIMM reduces the maximum number of DSIMMss to six AVB one maximum used with a second VSIMM 196 System Board FIGURE B 1 shows a block diagram of the SPARCstation 20 system board SPARCstation 20 Service Manual July 1996 DSIMM 0 Memory bus SMC COT 416 MBus Video 0 Video 1 MBus 1 SBus 1 A SBus 3 MBus 0 SBus 0 5008 2 SBus A DBRI MSBI SEC MACIO A Aux video pm eee i 1 4 A TOD 1 Y Audio on Floppy EEPROM board 82077 85C30 85C30 SCSI connector Legere NN See ee FIGURE B 1 System Board Block Diagram SBus Card Each system board supports one to four SBus cards A wide variety of I O options can be used with SBus cards such as graphic displays Ethernet printers and serial
150. t A 25 TxC B 0 RS2 32 423 Transmit clock port B Twisted Pair Ethernet Connector TABLE C 5 lists connector pin assignments and signal descriptions for the twisted pair Ethernet connector RJ45 FIGURE 0 5 Twisted pair Ethernet Connector Appendix 0 System Board Connector Pinouts 1 TABLEC 5 Twisted Pair Ethernet Connector Pin Assignments Pin Function 1 0 Level Signal Description 1 TPO O Analog Differential twisted pair transmit data 2 TPO O Analog Differential twisted pair transmit data 3 TPI I Analog Differential twisted pair receive data 4 None GND Not connected 5 N C None GND Not connected 6 TPI I Analog Differential twisted pair receive data 7 N C None GND Not connected 8 N C None GND Not connected SCSI Connector TABLE C 6 lists the pin assignments and signal descriptions for the SCSI connector 500 0 0 0 0 0 0 0 000 000000000 0 0686 oe oe FIGURE C 6 SCSI Connector TABLE 0 6 SCSI Connector Pin Assignments Pin Function Level Signal Description 1 Ground None GND Ground 2 Ground None GND Ground 3 Ground None GND Ground 4 Ground None GND Ground 212 SPARCstation 20 Service Manual July 1996 TABLEC 6 SCSI Connector Pin Assignments Continued Pin Function Level Signal Description 5 Ground None GND Ground 6 Ground None GND Ground 7 Ground None GND Ground 8 Ground None GND Ground 9 Ground None GND Gr
151. tation 20 Service Manual July 1996 8 Detach the wrist strap and replace the cover See Chapter 7 9 Power on the system See Turning On the Power on page 47 AN DC Power Harness The SPARCstation 20 system is configured with one of two chassis types A chassis that supports the SunCD 2Plus drive 1 inch drive A chassis that supports the SunCD 4 drive 1 6 inch drive Removing and installing the DC power harness varies depending on the chassis The following sections provide DC power harness removal and installation for each chassis type Removing the DC Power Harness SunCD 2Plus Drive Type Chassis Remove power from the system See Removing Power from the System on page 45 Remove the cover See Removing the Cover on page 49 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface 3 Attach a wrist strap to the top metal edge of the system back panel FIGURE 8 35 Chapter 8 Removing and Installing Subassemblies 7 Power supply rear view Power supply DC power A lt harness Captive screw 2 FIGURE 8 35 Attaching a Wrist Strap to Back Panel and Removing the Power Supply Note The wrist strap is usually grounded to the power supply When removing or installing the power supply ground the
152. ted to the Sun Workstation serial port When powering on the SPARCstation 20 in diagnostic mode messages will be displayed at this window 4 When POST is completed disconnect the tip window by typing tilde period EOT hostname POST Tests CODE EXAMPLE 3 3 provides a sample listing of the full diagnostic mode tests executed by POST in a system with two MBus modules installed Note that the beginning of the test indicates the number of MBus modules installed 20 SPARCstation 20 Service Manual July 1996 CODE EXAMPLE 3 3 n CPU_ 0 CPU_ 2 Q oO SS 5 5 4 Q H H CC SPARCstation 10 20 UP MP U Context Table Reg Test U Context Register Test U TLB Bit Pattern Tests U Flush Tests he RAM Write Read Test Cache PTAG Write Read Test Cache STAG Write Read Test Cache RAM Write Read Test Cache PTAG Write Read Test Cache STAG Write Read Test I Cache Flush Test Cache Flashclear Test XCC Register Test XCC E Cache Tag RAM Test EMC SMC ECC Multiple UE Tes ECC Multiple CE Tes ECC Multiple CE UE Test Control Reg FPU Register File Test FPU Misaligned Reg FPU Single precision FPU Double precision FPU SP Invalid Cl Copy Read Test XCC E Cache Data RAM Test 1 MB XCC Non Cache Block Zero XCC Non Cache Block XCC Cacheable Block XCC Cacheable Block Write Test
153. th no external cache This is not a supported configuration Status LEDs and Indicators The system LED is located on the right front side of the chassis and lights when the system is operating FIGURE 3 1 shows the location of the system LED TABLE 4 1 on page 27 suggests corrective actions when the system LED is not lit Chapter 23 24 SS System unit oS LED FIGURE 3 1 System LED Location When POST fails at power on LED indicators on specific keyboard keys display a particular LED pattern See FIGURE 3 2 and TABLE 3 1 Specific keyboard keys include Scroll Lock Num Lock Compose Note During normal system operation the keyboard key LEDs should not be interpreted as diagnostic error indicators Note The Caps Lock key LED is not used as a power on test failure indicator but flashes on and off while POST is initialized SPARCstation 20 Service Manual July 1996 Scroll Lock Num Lock key indicator key indicator amp v Caps Lock key indicator Compose key indicator FIGURE 3 2 Type 5 Keyboard Key LEDs TABLE 3 1 Keyboard Key LED Description LED State Description Caps Lock flashing or lit POST is executing Num Lock on System board fa
154. the captive screw s that secure the power supply to the chassis FIGURE 8 3 Note Some systems use only one captive screw to secure the power supply 58 SPARCstation 20 Service Manual July 1996 Captive screw 2 C Gamo lt JO Sh Ae oe gt FIGURE 8 3 Power Supply Captive Screws Connect the DC power connector to the system board FIGURE 8 4 Remove the wrist strap and replace the cover See Chapter 7 Connect the power cord to the rear of the system unit and the wall receptacle Power on the system See Turning On the Power on page 47 ST SS f l 1 j if 7 f if Li r pe T DC power _ lt 71 ca yo connector roo Loo eae Power supply kal Aal System board FIGURE 8 4 Connecting the DC Power Connector to the System Board Chapter 8 Removing and Installing Subassemblies 59 60 LED To remove and install the LED proceed as follows Removing the LED Note The LED is attached to one end of the speaker LED cable by an in line connector Remove power from the system See Remov
155. tistatic bags before placing it on any surface Note Tape or tie wrap markers on internal cables help in properly routing the cables through the metal cable guides The part of each cable with a marker is to be visible between the metal cable guides on the chassis bottom Route the SCSI data cable as follows FIGURE 8 32 a Route the SCSI connectors P3 and P1 through the drive bracket sheetmetal opening b Position the SCSI cable marker under the metal cable guide route the SCSI data cable through the chassis metal guides and the system board guide plastic hooks Chapter 8 Removing and Installing Subassemblies 91 92 Metal cable guide Tie wrap markers Speaker LED 3 harness DC power SCSI data Drive bracket harness cable marker sheetmetal opening Card guide plastic hooks FIGURE 8 32 Cable Guide Detail Connect the following cables to the SCSI backplane FIGURE 8 31 a SCSI data connector P3 b DC power connector P1 Replace the SunCD 2Plus CD ROM drive See Installing a CD ROM Drive on page 124 Position the system board into place and tighten the two captive screws on the back panel that secure the system board to the chassis FIGURE 8 34 Replace any SBus cards see FIGURE 8 37 See Installing an SBus Card on page 156 Connect the following cables to the system board FIGURE 8 40 Speaker LED cable SPARCstation 20 Service Manual July 1996
156. tive Screws 10 Remove the diskette drive See Removing a Diskette Drive on page 127 11 Free the SCSI cable from the metal cable guides FIGURE 8 38 100 SPARCstation 20 Service Manual July 1996 sheetmetal opening 12 13 14 Tie wrap Metal cable markers DV guide Speaker LED Rs harness 5 2S DC power harness C Si SCSI data Drive bracket cable marker Card guide plastic hooks FIGURE 8 38 Detail of Cable Guide Remove the DC power harness from the metal cable guides FIGURE 8 39 Disconnect the DC power connector P3 from the SCSI backplane FIGURE 8 39 Remove the DC power harness from the chassis Chapter 8 Removing and Installing Subassemblies 1 102 SCSI backplane SCSI data connector P1 DC power connector P3 clip FIGURE 8 39 SCSI Backplane SCSI Data and DC Power Connectors Installing the DC Power Harness SunCD 2Plus Drive Type Chassis Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Note Tape or tie wrap markers on internal cables help in properly routing the cables through the metal cable guides The part of each cable with a marker is to be visible between the metal cable guides on the chassis bottom Place the DC power har
157. trical Specifications 17 inch Monitor Parameter Specification Nominal frequencies Nominal voltage range Typical operating current Typical operating power Maximum current SPARCstation 20 Service Manual July 1996 50 Hz or 60 Hz 100 to 120 VAC or 200 to 240 VAC 1 6 A at 100 VAC 0 8 A at 240 VAC 120 W 2 7 A at 100 to 120 VAC 1 5 A at 200 to 240 VAC TABLE A 3 Electrical Specifications 17 inch Monitor Continued Parameter Specification Maximum VA rating 290 VA Maximum power consumption 200 W Heat output 410 BTUs hr TABLE A 4 Electrical Specifications 20 inch Monitor Parameter Specification Nominal frequencies 50 Hz or 60 Hz nominal Nominal voltage range 100 to 120 VAC or 200 to 240 VAC Typical operating current 1 7 A at 110 VAC 0 85 A at 220 VAC Standby power 5 W Typical operating power 125 W Maximum current 2 2 A at 100 to 120 VAC 1 4 A at 200 to 240 VAC Maximum VA rating 295 VA Maximum power consumption 150 W Heat output 427 BTUs hr Appendix A Product Specifications 193 194 Environmental Specifications TABLE A 5 lists the operating and non operating environmental specifications for the SPARCStation 20 system TABLE A 5 Environmental Specifications Operating Environment Temperature range 32 F to 104 F 0 C to 40 C Humidity 93 RH at 104 F 40 C Altitude range 0 to 10 000 feet 0 to 3 km Non Operating Environment Temperature range 40 F to 14
158. upply proceed as follows Removing the Power Supply Caution To avoid system board or component damage press the standby side of the power on standby switch before disconnecting the power cord from the back panel When the power supply power is restored the power supply automatically returns to the previous power state Remove power from the system See Removing Power from the System on page 45 Caution The AC power cord must be disconnected to replace the power supply Do not reconnect the AC power cord while the power supply is outside of the chassis 55 AN 2 Disconnect the power cord from the back of the system unit and from the wall receptacle Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Remove the cover and attach a wrist strap See Chapter 7 Note The wrist strap is usually grounded to the power supply When removing or installing the power supply ground the wrist strap to the metal edge of the system back panel Remove the power supply as follows FIGURE 8 1 a Loosen the back panel captive screws that secure the power supply to the chassis Note Some systems use only one captive screw to secure the power supply b Disconnect the DC power connector from the system board c Slide th
159. ved or installed Removing a Diskette Drive Remove power from the system See Removing Power from the System on page 45 Remove the cover and attach a wrist strap See Chapter 7 Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Remove the CD ROM drive if installed FIGURE 9 10 See Removing a CD ROM Drive on page 123 Note If a CD ROM drive is not installed the CD ROM filler panel must be removed to access the diskette drive Diskette drive lower position CD ROM drive _ upper position Diskette drive E connector 1 00 FIGURE 9 9 Diskette Drive Location Chapter 9 Storage Devices 7 4 Remove the filler panel as follows FIGURE 9 10 a Press the filler panel tabs in b Rotate the filler panel outward c Remove the filler panel from the chassis Tab Tab FIGURE 9 10 CD ROM Drive Filler Panel 5 Place the screwdriver tip into the drive bracket slot next to a diskette grommet Use the screwdriver as a lever to move a diskette grommet forward toward the center of the chassis FIGURE 9 11 6 Repeat Step 5 for other grommets to free the diskette drive 7
160. verview This chapter contains descriptions of the system board The following topics are presented in this chapter gt Preventing Damage Caution Use an antistatic mat when working with the system board An antistatic mat contains the cushioning needed to protect the underside components to prevent board flexing and to provide antistatic protection gt gt Handling System Boards and Assemblies Caution The system chassis power on standby switch must be set to standby mode and the AC power cord must be plugged in to ensure proper grounding Caution Hot surface Avoid contact Surfaces are hot and may cause personal injury if touched 139 Caution The system board and related modules and cards have surface mount components that may break when the board is flexed To minimize the amount of board flexing observe the following precautions 140 Hold the system board only by the edges Do not place the system board or any component of the system board SBus card MBus module SIMM or chip on a hard surface Use a cushioned antistatic mat See Chapter 12 Transport the system board in an antistatic bag System Board Description FIGURE 10 1 identifies the major components of the SPARCstation 20 system board SPARCstation 20 Service Manual July 1996 Diskette data connector SIMM slots SBus slots SCSI data connector Speaker LED connector DC power connector
161. vii xviii TABLE B 1 TABLE B 2 TABLE B 3 TABLE C 1 TABLE C 2 TABLE C 3 TABLE C 4 TABLE C 5 TABLE C 6 TABLE C 7 TABLE C 8 TABLE D 1 TABLE D 2 Memory Allocations 9 DSIMM DRAM Densities 9 VRAM Densities 201 Parallel Connector Pin Assignments 6 AUI Connector Pin Assignments 7 Keyboard Mouse Connector Pin Assignments 9 Serial Ports A and B Connector Pin Assignments 0 Twisted Pair Ethernet Connector Pin Assignments 212 SCSI Connector Pin Assignments 2 13W3 Connector Pin Assignments 215 Audio Port Signals 216 SCSI Addresses Solaris 1 1 1 Version B SunOS 4 1 3_U1 Version B Operating Environment 219 SCSI Addresses Solaris 2 3 SunOS 5 3 Operating Environment and Later Versions 220 SPARCstation 20 Service Manual July 1996 Preface This manual provides detailed procedures that describe the removal and replacement of field replaceable units FRUs in the SPARCstation 20 system People that should use this book include technicians advanced computer system end users with experience in replacing hardware and troubleshooting system administrators and qualified service providers Document Organization This book is comprised of seven parts See the following table TABLE P 1 Document Organization Part Number Title Chapter Number Title Description Part 1 System Chapter 1 Product Describes the standard features internal Information Description options and exte
162. wer Connector SunCD 4 Drive Type Chassis Loosen the two captive Phillips head screws that secure the system board to the rear chassis FIGURE 8 34 Pull the system board from the back of the chassis until it clears the plastic card guide FIGURE 8 34 Caution Place the system board on an antistatic surface Remove the SunCD 4 CD ROM drive See Removing a CD ROM Drive on page 123 94 SPARCstation 20 Service Manual July 1996 Metal cable clips on chassis wall Card guide FIGURE 8 34 Removing the System Board 33 7 Disconnect the following FIGURE 8 and from a The SCSI data cable from the metal cable clips on the chassis wall the plastic cable clips on the card guide b The DC power harness from the SCSI backplane c The internal SCSI data cable from the SCSI backplane 8 Remove the SCSI data cable 95 Removing and Installing Subassemblies Chapter 8 96 Installing the SCSI Data Cable SunCD 4 Drive Type Chassis Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and use an ESD protected mat Store ESD sensitive components in antistatic bags before placing it on any surface Note The SCSI data cable is a three connector pigtail cable with colored tape that joins two of the cables closest to the P2 connector Visual markers are placed on the cables to aid cable alignment When properly installed the SC
163. ws and Washers 158 DSIMM Front View 159 DSIMM Back View 160 VSIMM Front View 160 VSIMM Back View 1 NVSIMM Battery Side 161 SIMM Slot Locations 162 SIMM Ejection Levers 3 DSIMM Back View 4 VSIMM Back View 165 NVSIMM Battery Side 5 Aligning the NVSIMM in the Slot Back View 166 Insertinga DSIMM 167 Inserting a VSIMM NVSIMM_ 167 AVB Installed 169 Removing the AVB 169 Installing the Auxiliary Video Board 170 Disconnecting Diskette SCSI DC Power and Speaker LED Connectors 172 System Board Captive Screws 172 Removing the System Board 173 System Board Jumper Settings 4 Installing the System Board 175 System Board Captive Screws 176 Connecting Diskette SCSI DC Power and Speaker LED Connectors 177 Figures xv FIGURE 11 43 GURE 11 44 FIGURE 11 45 FIGURE 11 46 FIGURE 12 1 FIGURE 12 2 FIGURE 12 3 FIGURE 12 4 FIGURE 12 5 FIGURE B 1 FIGURE B 2 FIGURE B 3 FIGURE B 4 FIGURE B 5 FIGURE C 1 FIGURE C 2 FIGURE C 3 FIGURE C 4 FIGURE C 5 FIGURE C 6 FIGURE C 7 FIGURE C 8 FIGURE C 9 FIGURE C 10 FIGURE C 11 FIGURE C 12 OpenBoot PROM Location 178 OpenBoot PROM Orientation 180 NVRAM TOD Location 181 NVRAM TOD Orientation 2 Selected FRUs 186 SPARCstation 20 System Exploded View 187 Major Components of the System Board 188 Standard External Cables 189 Optional External Cables 0 System Board Block Diagram 197 DSIMM Memory System 0 VSIMM Me
164. xtends through a slot in the drive bracket Grasp the left edge of the SCSI backplane and rotate it away from the chassis Pull the end of the backplane with the SCSI data socket and the DC power socket out through the drive bracket area Remove the SCSI backplane from the chassis Chapter 8 Removing and Installing Subassemblies 85 Left edge of SCSI data Sheetmetal slot SCSI backplane socket fae 5 AS Sheetmetal c chassis 6 vented area DC power socket Phillips head screw 2 FIGURE 8 27 SCSI Backplane Screws 9 Remove the SCSI backplane bracket as follows FIGURE 8 28 a Insert long needlenose pliers or a flat blade screwdriver between the SCSI backplane bracket and the sheetmetal chassis Note If there is difficulty in accessing the bottom plastic tab with needlenose pliers use a flat blade screwdriver to push the tabs toward the chassis corner b Squeeze the plastic bracket tabs together and release the SCSI backplane bracket from the slots that secure it to the sheetmetal chassis 86 SPARCstation 20 Service Manual July 1996 Long needlenose pliers Sheetmetal chassis SCSI backplane bracket Plastic a bracket tab 2 FIGURE 8 28 SCSI Backplane Bracket Tabs Installing the SCSI Backplane Caution Use proper ESD grounding techniques when handling components Wear an antistatic wrist strap and u
165. y VRAM Physically VRAM chips are grouped together as VSIMMs Each VSIMM contains 4 or 8 Mbytes of video memory Each VSIMM is a complete high speed high resolution frame buffer that plugs into a memory slot located on the system board A maximum of two VSIMMs may be installed With two VSIMMs installed a maximum of six DSIMMs 384 Mbytes may be installed Note If a second VSIMM is installed an auxiliary video board AVB must also be installed to provide a second 13W3 video output connector See Auxiliary Video Board on page 168 A VSIMM differs in appearance from a DSIMM FIGURE 11 22 shows the front view of a VSIMM FIGURE 11 23 shows the back view of a VSIMM Plastic cover ee ane FIGURE 11 22 VSIMM Front View a 160 SPARCstation 20 Service Manual July 1996 FIGURE 11 23 VSIMM Back View NVSIMM Each NVSIMM contains 2 Mbytes of memory a battery and power controller circuitry to ensure memory is not lost when the system is shut down or halts because of abnormal conditions The NVSIMM is a card with a round non replaceable battery mounted on one side The NVSIMM plugs into a memory slot located on the system board FIGURE 11 25 shows the battery side of the NVSIMM Battery Jumper iil
166. ype rm filename Read Chapter 6 in User s Guide These are called class options You must be root to do this Related Documentation The following table lists related documentation supporting SPARCstation 20 operation TABLE P 3 Related Documentation Document Title OpenBoot 2 x Command Reference Manual SunDiag User s Guide SunDiag User s Guide Addendum SunVTS 2 0 User s Guide SunVTS 2 0 Test Reference Manual xxii SPARCstation 20 Service Manual July 1996 Part number 802 3241 801 6627 801 7263 802 5331 802 5330 TABLE 3 Related Documentation Continued Document Title Part number SunVTS 2 0 Quick Reference Card Product Notes SPARCstation 20 System administration manual for your computer system Operating system documentation 802 5329 801 7464 N A N A UNIX Commands This manual does not include specific software commands or procedures Instead it names software tasks and refers to operating system documentation or the handbook that was shipped with the hardware See one or more of the following Solaris 2 x Handbook for SMCC Peripherals contains Solaris 2 x software commands On line AnswerBook for the complete set of documentation supporting the Solaris 2 x software environment Other software documentation that you received with your system Preface xxiii Shell Prompts The follow

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