Sun Microsystems SPARCclassic X, SPARCstation LX Workstation Service Manual

SPARCclassic/SPARCclassic X/
SPARCstation LX Service Manual
A Sun Microsystems, Inc.
Business
901 San Antonio Road
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Part No: 801-2176-13
Revision A, November 1993
USA 650 960-1300 fax 650 969-9131
SPARCclassic/SPARCclassic X/
SPARCstation LX Service Manual
Part No: 801-2176-13
Revision A, November 1993
Copyright 1997 Sun Microsystems, Inc. 901 San Antonio Road, Palo Alto, California 94303-4900 U.S.A. All rights reserved.
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Contents
Preface
1.
x
Product Description
1
System Unit 1
Main Logic Board
4
Memory Modules 5
Nonvolatile RAM (NVRAM)
6
Internal Hard Disk Drive 6
Internal Diskette Drive 7
Power Supply 7
Monitors, Keyboard, and Mouse
2.
External Storage Devices
8
System Interconnections
8
Troubleshooting Overview
7
11
Default Boot Mode 11
Boot PROM Diagnostics
Low-Level POST Code
12
14
Diagnostic Tools and When to Use Them 16
Power-On Self-Test
18
Selected On-Board Tests
18
Contents iv
Sundiag System Exerciser
Forth Toolkit
20
SunDiagnostic Executive
3.
19
20
Power-On Self-Test (POST) 21
Power-On Self-Test (POST)
21
Normal Mode 23
Full Diagnostic Mode 24
Abbreviated Diagnostic Mode
24
Setting Up a tip Connection to Another Workstation
24
Tests the POST Runs 25
POST Error Messages 28
Status Lights (LEDs) and Indicators 29
4.
Troubleshooting Procedures
31
No Video Output on the System Monitor 32
Power-On Does Not Succeed
Power Supply Test
33
System Board Test
35
33
Disk Drive Errors 36
Verifying the Built-In SCSI Controller
36
Determining Faulty DSIMM Locations 37
5.
Safety and Tools Requirements 41
Safety Requirements
41
Symbols 42
System Precautions
Tools Required
6.
43
43
Power Off and On 45
Powering Off the System 45
Powering Off When the System Is Working Normally
v
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Powering Off When the System Does Not Respond Normally
47
Powering On the System 48
7.
Internal Access 51
Disconnecting the External Cables
51
Opening the System Unit 52
Attaching the Wrist Strap
53
Closing the System Unit 55
Reconnecting the External Cables
8.
57
Major Subassemblies 59
Power Supply
59
Removing the Power Supply 60
Replacing the Power Supply 61
Speaker/Power LED Assembly 62
Removing the Speaker/Power LED Assembly 62
Replacing the Speaker/Power LED Assembly 64
System I/O Board
9.
65
Removing the System I/O Board
65
Replacing the System I/O Board
71
Storage Devices
75
Hard Disk Drive
75
Removing a Hard Disk Drive
76
Preparing a Hard Drive for Installation 77
Installing a Hard Disk Drive 88
Disk Drive Bracket
91
Removing the Disk Drive Mounting Bracket
91
Replacing the Disk Drive Mounting Bracket
94
Diskette Drive 96
Removing the Diskette Drive 97
Contents vi
Replacing the Diskette Drive 98
10.
System Board Overview
99
Before You Begin 99
Damage Prevention
100
Handling System Boards and Assemblies 100
Main Logic Board Layouts 102
Identifying Replaceable System Board Components
11.
Main Logic Board and Component Replacement
SBus Cards
104
107
107
Removing SBus Cards 107
Replacing SBus Cards
Video SIMM (VSIMM)
110
113
Removing the VSIMM 113
Replacing the VSIMM 115
DRAM Single In-line Memory Modules (DSIMMs)
117
DSIMM Configurations 117
Removing a DSIMM 120
Replacing a DSIMM 122
Main Logic Board
124
Main Logic Board Voltage Test Points
125
Before Replacing the Main Logic Board 128
Removing the Main Logic Board
132
Installing the New Main Logic Board
136
Nonvolatile RAM (NVRAM) 138
Removing the NVRAM
138
Replacing the NVRAM
140
SPARCstation LX ISDN Jumper Settings
12.
vii
Illustrated Parts Breakdown
140
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Illustrations of Selected CRUs 143
A.
Replacement Part List
146
System Specifications
153
Input Power Requirements
153
Environmental Requirements
154
Physical Specifications 155
Regulatory Compliance
B.
System Connectors
155
157
Attachment Unit Interface (AUI) Connector
158
Twisted-Pair Ethernet Connector 159
ISDN Terminal Endpoint Connector 159
ISDN Network Termination Connector 160
Keyboard/Mouse Connector 161
SCSI Connector (External) 161
Serial Connector 163
Parallel Connector 164
13W3 Video Connector 165
Audio Ports and Audio Module 166
Audio Ports
166
Signals for the Audio Ports
166
Audio Line-Out Connector 166
Audio Line-In Connector
167
SCSI Connector (Internal) 167
Diskette Drive Connector (Internal) 168
SBus Connector (Internal)
170
Power Connector (Internal) 171
C.
On-Board Diagnostics
173
Running the On-Board Diagnostics
173
Contents viii
Test <alias name>, Test <device path> 175
Test-all
176
Watch-clock
176
Watch-net, Watch-aui, Watch-tpe and Watch-net-all
Probe-scsi, Probe-scsi-all
Test-memory
176
178
178
Returning to the Monitor Prompt
179
Glossary 181
Index 185
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Preface
The SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual describes how to:
4 Identify system problems by running diagnostic programs
4 Remove and replace customer replaceable units (CRUs)
This book is written for Sun Field Service representatives, original equipment
manufacturers (OEMs), value-added resellers (VARs), and other customers with
self-maintenance contracts.
Document Organization
This book is divided into seven parts. A table at the beginning of each part lists the
chapters, sections and their page numbers.
TM
4 Part 1, “System Information,“ describes
an overview of the SPARCclassic /
TM
SPARCclassic X/SPARCstation product line’s standard features, and its external
options.
4 Part 2, “Troubleshooting,“ provides a troubleshooting overview; explains how to
run the Power-On Self-Test (POST) and other system diagnostics; and gives
troubleshooting procedures for some frequently encountered problems.
4 Part 3, “Preparing for Service,“ explains safety requirements, the symbols used in
this book, the tools required for replacing customer replaceable units, and how to
shut down, power off, and power on the system.
4 Part 4, “Subassembly Removal and Replacement,“ describes how to open and
close the system, attach and remove a wrist strap, and remove and replace
subassemblies.
Preface x
4 Part 5, “System Board,“ provides an overview of the system board, and describes
how to remove and replace the system board, replaceable parts, and components
on the system board.
4 Part 6, “Illustrated Parts Breakdown,“ provides illustrations of the major
replaceable parts and lists part numbers.
4 Part 7, “Appendixes, Glossary, and Index,“ defines physical, electrical, and
environmental specifications; lists connector pinouts and signal descriptions;
explains how to run selected on-board diagnostics; and provides a glossary of
technical terms, and an index.
What Typographic Changes and
Symbols Mean
The following table describes the type changes and symbols used in this book.
TABLE P–1
Typographic Conventions
Typeface or
Symbol
AaBbCc123
Meaning
Example
The names of commands, files, and
directories; on-screen computer
output
Edit your .login file.
Use ls -a to list all files.
system% You have mail.
Return
In text, key names are capitalized
Press the Return key.
Stop-a
Press and hold the Stop key, then
type the second character
Press Stop-a
AaBbCc123
What you type, contrasted with
on-screen computer output
system% su
Password:
AaBbCc123
Command-line placeholder:
To delete a file, type rm filename.
replace with a real name or value
AaBbCc123
Book titles, new words or terms, or
emphasized words
Read Chapter 6 in User’s Guide.
These are called class options.
You must be root to do this.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE P–1
Typographic Conventions
Typeface or
Symbol
(continued)
Meaning
Example
Code samples are included in boxes and may display the following:
%
UNIX C shell prompt
system%
$
UNIX Bourne and Korn shell
prompt
UNIX Bourne and Korn shell
prompt
#
Superuser prompt, all shells
Superuser prompt, all shells
Mouse buttons are referred to in
this way:
Mouse Buttons
Related Books
The following books provide additional information, and are occasionally referenced
in this manual:
4 Open Boot Command Summary provides quick-reference information about the
various functions of the Open Boot PROM.
4 Open Boot Command Reference provides information about advanced functions of
the Open Boot PROM.
4 Sundiag User’s Guide covers
information about Sundiag, a system exerciser that
TM
runs under the SunOS operating system. Sundiag displays real-time use of
system resources and peripherals.
xii
4 Sundiag User’s Guide-Addendum for SMCC Hardware covers Sundiag topics that
are specific to SPARCstation systems.
4 Desktop SPARC Hardware Owner’s Guide provides step-by-step instructions on
how to install the system’s hardware and software.
4 Using a SPARCclassic X Terminal contains instructions on how to install the
SPARCclassic X hardware.
4 Installing SPARCclassic/SPARCclassic X/SPARCstation LX SIMMs provides
step-by-step information on how to install DSIMMs and VSIMMs in these systems.
4 Desktop Storage Pack Installation & Operation Manual explains
how to install a
TM
Desktop Backup Pack, Desktop Disk Pack, or Desktop SunCD Pack.
4 Desktop Storage Module Installation & User’s Guide explains how to install and
daisy-chain Desktop Storage Modules.
4 SunDiagnostic Executive User’s Guide for SPARCstations explains how to run
extensive, configurable tests that are independent of the operating system you use.
The SunDiagnostic Executive is the tool of choice when you need thorough
diagnostics. With the SunDiagnostic Executive, you can determine which customer
replaceable unit needs to be replaced.
4 Sun ISDN-BRI/SBI Hardware Configuration Guide explains about configuring
ISDN jumpers.
Notes, Cautions, and Warnings
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.
Individuals who remove any outer panels to access this equipment must 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 qualified Field
Service-trained maintenance providers.
Note - Before you begin, carefully read each of the procedures in this manual. If you
have not performed similar operations on comparable equipment, do not attempt to
perform these procedures.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
CHAPTER
1
Product Description
This chapter presents an overview of the major components of the SPARCclassic,
SPARCstation LX systems, and the SPARCclassic X terminal. Acquaint yourself with
the overview before servicing and maintaining the hardware for these products.
4 “System Unit” on page 1
4 “Monitors, Keyboard, and Mouse” on page 7
4 “External Storage Devices” on page 8
4 “System Interconnections” on page 8
The SPARCclassic or the SPARCstation LX systems also can have an external storage
device or other small computer system interface (SCSI), serial, or parallel port
devices attached. The SPARCclassic X terminal software does not currently support
external devices.
System Unit
The heart of the SPARCclassic and SPARCstation LX systems is the system unit,
which contains the following components:
4 Main logic board (MLB)
4 Internal hard disk drive
4 Internal diskette drive (optional)
4 Power supply
Figure 1–1 and Figure 1–2 show the front and rear panels of the system unit.
1
Figure 1–1
Front Panel of the SPARCclassic and SPARCstation LX System Units
The SPARCclassic X terminal chassis looks identical to the chassis shown above,
except that the components on the list below are either not available or are inactive,
and are consequently covered by connector covers:
4 Diskette drive slot
4 SCSI port
4 Audio port
4 Parallel port
Internally, the SPARCclassic X terminal differs from the basic SPARCclassic system
by the absence of the disk drive and diskette drive. The annotations to Figure 1–2
and Figure 1–3 indicate the differences among the SPARCclassic system, the
SPARCstation LX system, and the SPARCclassic X terminal.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 1–2
Rear Panel of the System Unit
Product Description
3
Figure 1–3
System Unit Internal Components
Main Logic Board
The main logic board (MLB) resides in the bottom half of the system unit. It plugs
into the system input/output (I/O) board, which provides all of the external
connectors to the system unit’s back panel (see Figure 1–2).
The different SPARCclassic/SPARCclassic X/SPARCstation LX MLB layouts are in
Chapter 10. Figure 10–1 shows a simplified layout of the SPARCclassic and the
SPARCclassic X main logic board, while Figure 10–2 and Figure 10–3 show the
SPARCstation LX main logic boards.
Customer replaceable units (CRUs) residing on the main logic board include:
4 Memory modules
4 Video single in-line memory modules (VSIMMs) (SPARCstation LX only)
4 SBus cards
4 Nonvolatile random access memory (NVRAM)
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Memory Modules
SPARCclassic and SPARCstation LX system units come equipped with at least
16 megabytes of dynamic random access memory (DRAM), expandable to 96
megabytes. The X terminal comes with either 4 or 8 megabytes of DRAM,
expandable to 96 megabytes.
Physically, DRAM chips are grouped in single in-line memory modules (DSIMMs)
that plug into DSIMM slots located on the main logic board of the system unit (see
Figure 10–1 and Figure 10–2). The main logic board contains six DSIMM slots
capable of accepting either 1-, 2-, 4-, or 16-megabyte DSIMMs.
The maximum memory configuration is 96 megabytes using six 16-megabyte
DSIMMs. You can combine different types of DSIMMs in the same system; however,
you must add DSIMMs in identical pairs. That is, you can add a pair of 4-megabyte
DSIMMs or a pair of 16-megabyte DSIMMs, but you can’t add a single DSIMM or
add one of each type.
Figure 1–4
Typical DSIMM
Video SIMM
SPARCstation LX systems can accommodate an optional 1-megabyte video SIMM
(VSIMM). The VSIMM plugs into a VSIMM slot on the main logic board and allows
SPARCstation LX systems to support the following video display resolutions:
4 1600 x 1280
4 1280 x 1024
4 1152 x 900 double-buffered
SBus Cards
You can add various SBus cards to the system’s two SBus slots on the main logic
board. Figure 10–1 and Figure 10–2 show the location of the SBus slots. See the “SBus
Cards” on page 107 for information about how to remove and replace SBus cards.
Product Description
5
Figure 1–5
Typical SBus Card
The following is a sampling of the SBus cards available for SPARCclassic and
SPARCstation LX systems. Note that this is not an all-inclusive list.
4 GX Graphics Accelerator Card – This card controls the video output from the system
unit, and accelerates the generation of graphic images. The GX Graphics
Accelerator card occupies one SBus slot on the main logic board. (On the
SPARCclassic X terminal, the card is supported as a factory-installed option but
not as an add-on board.)
4 Color Frame Buffer Card – This card occupies one SBus slot. This card controls the
video output from the system unit to a color monitor.
4 Second Ethernet Card – This card provides you with an extra Ethernet port. The
Ethernet card is used in applications in which your SPARCstation acts as a
gateway between two physically distinct Ethernet networks. This card has two
connectors: standard (thick) Ethernet and twisted-pair Ethernet. It occupies one
SBus slot.
4 Video Frame Capture Card – This card occupies one SBus slot. This card takes video
input and displays it on color or monochrome monitors.
4 SBus Printer Card – This card occupies one SBus slot. This card connects the system
to printing, plotting, and scanning devices.
Nonvolatile RAM (NVRAM)
The NVRAM chip on the main logic board contains the time-of-day clock and the
nonvolatile RAM (see Figure 10–1 and Chapter 10). The nonvolatile RAM stores the
default system configuration parameters. These parameters define how the system is
configured at the lowest level. You can modify these parameters using the Forth
Toolkit. For additional details, see the manual Open Boot Command Reference.
Internal Hard Disk Drive
Diskful systems have one 3.5-inch embedded SCSI hard disk drive installed in the
top half of the system unit. Depending on your system configuration, the drive may
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
be a 207-megabyte, a 424-megabyte, a 535-megabyte, or a 1.0-gigabyte disk. (The
SPARCclassic X terminal is not a diskful system.)
Internal Diskette Drive
The top half of the TM
system unit accommodates a 3.5-inch, triple-density diskette
drive, which is Sun , IBM®®, and NEC®® compatible. It uses 3.5-inch (88.9-mm)
diskettes (types HD, 2HD, and 2DD) and supports densities of 720 kilobytes, 1.2
megabytes, and 1.44 megabytes. The diskette drive is optional on both SPARCclassic
and SPARCstation LX systems. It is not available for the SPARCclassic X terminal.
Power Supply
The 70-watt power supply is housed in the unit top. It connects to the main logic
board via a 12-pin connector and provides +5, +12, and –12 volts DC. The power
supply also supplies the power-on reset signal.
Some of the power supply’s features include the following:
4 Auto sensing
4 Output voltage regulation
4 Overcurrent protection
4 Overvoltage crowbar feature
4 Internal fusing
The external devices have their own power supplies.
Monitors, Keyboard, and Mouse
Each system uses a keyboard, an optical mouse, and one of the following types of
video monitors:
4 15-inch color monitor (381-mm)
4 16-inch mid-range color monitor (407-mm)
4 16-inch premium color monitor (407-mm)
4 19-inch grayscale monitor (483-mm)
4 19-inch color monitor (483-mm)
The main logic board has a built-in frame buffer that controls video output from the
system unit and can drive either color or grayscale monitors.
Product Description
7
External Storage Devices
You can add expansion storage devices to increase the mass storage capacity of the
SPARCclassic and SPARCstation LX systems. The following are some of the external
storage devices available:
4 Desktop Backup Pack 150 Mbytes (tape drive only)
4 Desktop Disk Pack 207 Mbytes (hard disk drive only)
4 Desktop Disk Pack 424 Mbytes (hard disk drive only)
4 Desktop SunCD Pack (compact disc drive)
4 Desktop Storage Module 1.3 Gbytes (hard disk drive only)
4 Desktop Storage Module 2.3 Gbytes (tape drive only)
4 Desktop Storage Module 5.0 Gbytes (tape drive only)
See the external storage device installation guide that comes with the device for
installation procedures and for information about daisy-chaining external drive units.
External storage devices are not available for the SPARCclassic X terminal.
System Interconnections
Figure 1–6 illustrates how to connect the basic components of the SPARCclassic and
SPARCstation LX workstations, and the SPARCclassic X terminal. For more detailed
installation procedures, see Desktop SPARC Hardware Owner’s Guide or Using a
SPARCclassic X Terminal.
Note - The external drive in Figure 1–6 is not part of the SPARCclassic X terminal.
See Figure 1–2 and Figure 1–3 for differences between the SPARCclassic X terminal
and the SPARCclassic workstation.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 1–6
Connecting the Major System Components
Product Description
9
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
CHAPTER
2
Troubleshooting Overview
This chapter describes the different types of diagnostic firmware and software tools
available to you for troubleshooting, and explains how they are related and when to
use them.
4 “Default Boot Mode” on page 11
4 “Boot PROM Diagnostics” on page 12
4 “Low-Level POST Code” on page 14
4 “Diagnostic Tools and When to Use Them” on page 16
4 “Power-On Self-Test” on page 18
4 “Selected On-Board Tests” on page 18
4 “Sundiag System Exerciser” on page 19
4 “Forth Toolkit” on page 20
4 “SunDiagnostic Executive” on page 20
Default Boot Mode
The flowchart in Figure 2–1 outlines the roles played by various diagnostics during
the default boot mode’s operation.
Note - The operating system diagnostic tools, as indicated in Figure 2–1, do not
apply to the SPARCclassic X terminal.
11
Boot PROM Diagnostics
The diagnostics are stored in the Open Boot PROM and include the following:
4 Power-On Self-Test
4 On-Board Diagnostics
The Power-On Self-Test (POST) tests the core CPU functionality. The progress of
testing can be monitored using the keyboard LEDs, the video monitor, and the
system’s serial port A.
If there is system trouble, you may want to run the extended On-Board Diagnostics
to take advantage of more extensive tests, including—but not limited to—Ethernet,
SCSI, memory, and diskette drive tests. See Appendix C,” for more information.
Note - The SCSI and diskette drive controller tests do not apply to the SPARCclassic
X terminal.
The following sections describe the relationship between the various diagnostic tools
and the role each tool plays during the default boot mode. A graphical depiction is
provided by the flowchart in Figure 2–1. The figure shows the path followed in
processing for the default boot mode, and where in the sequence other diagnostic
tests are available or are encountered. These descriptions assume you are using a
graphics monitor to view test results.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 2–1
Default Boot Mode
Troubleshooting Overview
13
Low-Level POST Code
When you turn on the system power, the low-level POST is initiated if any of the
following circumstances apply:
4 Keyboard is disconnected.
4 Stop-d keys are held down when you turn on the power.
4 diag-switch? NVRAM parameter is set to True.
The low-level POST code, which is stored in the boot PROM, is designed to test the
most basic functions of the system hardware. The status of the POST is conveyed by
four LEDs on the Type-5 keyboard. The Caps Lock LED flashes on and off to indicate
that the tests are in progress. If a failure is detected during low-level POST, one of
the other three LEDs will light to indicate the nature of the failure. See Chapter 3, for
more information.
If the low-level POST passes, the system probes for SBus devices and interprets their
drivers. Next, a system banner appears on the screen, and the high-level testing
begins. During this time, the screen displays a series of messages that start with the
word Testing. Any problems detected during this phase of testing are indicated
with error messages on the screen. When the high-level POSTs are finished, the
system checks parameters stored in the NVRAM to determine the next step.
Depending on the parameter settings, the system will:
4 Boot the operating system from a specified location
4 Continually cycle through the POST sequence
4 Suppress the boot process and enter the Forth Toolkit (ok prompt)
4 Suppress the boot process and enter the system monitor (> prompt)
Table 2–1 contains a list of NVRAM parameters and explains their effect on the
power-up sequence. For more on NVRAM parameters, see the Open Boot Command
Summary.
Note - At any point during the high-level POST, you can abort the POST process
and access the Forth Toolkit or system monitor by pressing the Stop and “a” keys
simultaneously.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE 2–1
NVRAM Parameters Used During POST and Boot Sequence
NVRAM Parameter
Description
selftest-#megs
This parameter determines how many megabytes of
memory to test during high-level POST. The minimum
is zero; the maximum is the amount actually installed
in the system.
Default = 1
diag-switch?
Default = False
auto-boot?
Default = True
When set to True, this parameter forces the system to
test automatically all available memory. It also enables
diagnostic message output to serial port A. If a
properly configured terminal or “tip window” is
connected, diagnostic progress can be monitored
through this port. Finally, a True setting causes the
system to boot the operating system from the device
and file specified in the diag-device and
diag-file NVRAM parameter fields.
When set to False, this will suppress the boot process.
The system halts with either the > prompt or the ok
prompt.
If the auto-boot? parameter is set to false, the system proceeds to the Forth
Toolkit (ok prompt), or to the system monitor (> prompt). Using the Forth Toolkit,
you can direct the system to boot the operating system from a location that you
specify, or you can execute a variety of additional tests called On-Board Diagnostics.
See the Open Boot Command Reference for a complete description of the Forth
Toolkit.
If the auto-boot? parameter is set to true (the default), the system boots a
standalone program. To determine which program and device to boot from, the
system checks the diag-switch? NVRAM parameter. Table 2–2 summarizes the
effect of the auto-boot? and diag-switch? parameters.
Troubleshooting Overview
15
TABLE 2–2
Summary of Autoboot and Diagnostic Switch Parameters
1
Autoboot Switch
Diagnostic Switch
Parameter
Parameter
Result
False
False or True
> or ok prompt
True
False
Boot operating system from
device alias “disk” or “net”
for SPARCclassic X
True
True
Boot operating system from
device alias “net”
Once the operating system is running, you can invoke the Sundiag System Exerciser
if further diagnostic testing is warranted. Refer to “Sundiag System Exerciser” on
page 19 for additional information.
Another standalone diagnostic program you can run is the SunDiagnostic Executive.
Refer to “SunDiagnostic Executive” on page 20 for further information.
To boot user-specified programs, such as the SunDiagnostic Executive, you must be
at the > prompt or ok prompt. See Appendix C for a detailed procedure on how to
access the > or ok prompt.
Note - Remember that the System Exerciser and the SunDiagnostic Executive do not
run on the SPARCclassic X terminal.
Diagnostic Tools and When to Use Them
Table 2–3 provides a summary of the available diagnostic tools and describes when
to use each tool.
1
1. The boot parameters represented here are default settings. The defaults may be changed by following the
procedures listed in the Open Boot Command Summary.
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TABLE 2–3
Diagnostic Tools
Diagnostic Tool
Power-On Self-Test (POST)
On-Board Diagnostics
Sundiag System Exerciser
Forth Toolkit
SunDiagnostic Executive
When or Why to Use the Tool
Executes automatically at power-on when Stop-d keys
are pressed or when the diag-switch? parameter is
set to True. The POST code resides in the boot PROM
and is driven by the POK signal from the power
supply. POST tells you if there is a problem with the
main logic board, the NVRAM, or the DSIMMs in the
default bank installed.
Tests functions such as the Ethernet and SCSI
interfaces, system memory, and the diskette drive
controller. (The SCSI and diskette drive controller tests
do not apply to the SPARCclassic X terminal.) You
must be at the ok prompt (the Forth Toolkit) to run
the On-Board Diagnostics. Enter n at the > prompt to
enter the Forth Toolkit. The On-Board Diagnostics
reside in the boot PROM.
Runs under the operating system. It displays real-time
use of the system resources and peripherals. The
Sundiag System Exerciser tells you if your system is
functioning correctly. If Sundiag fails, run the
Power-On Self-Test. If all power-on self-tests pass,
then run the SunDiagnostic Executive to identify the
problem. See the Sundiag User’s Guide for more
information. (This test is not applicable to the
SPARCclassic X terminal.)
Allows input to the system at the boot PROM level.
Supports functions such as changing NVRAM
parameters, resetting the system, running diagnostic
tests, displaying system information, and redirecting
input and output. See the Open Boot Command
Reference for more information.
Runs extensive, configurable subsystem tests that are
independent of the operating system. Run the
SunDiagnostic Executive if all tests pass when you run
the POST. Running the SunDiagnostic Executive
allows you to determine which customer replaceable
unit needs to be replaced. See the latest version of
SunDiagnostic Executive User’s Guide for the
SPARCstations for more information. (This test is not
applicable to the SPARCclassic X terminal.)
Troubleshooting Overview
17
Power-On Self-Test
For more information about the POST, see Chapter 3.
Selected On-Board Tests
For information about how to run the On-Board Diagnostics, see Appendix C. Table
2–4 lists specific on-board diagnostic tests for SPARCclassic and SPARCstation LX
systems.
TABLE 2–4
On-Board Diagnostics
Test
test floppy
18
Description and Requirements
Tests the floppy drive’s ability to respond to commands. Requires a
formatted diskette in the drive.
test screen
Tests the system video graphics hardware and monitor. The
diag-switch? NVRAM parameter must be set to True for the test to
run.
test scsi
Tests the SCSI logic on the main logic board. The diag-switch?
NVRAM parameter must be set to True for the test to run.
test net-aui
Performs internal and external loopback tests on the AUI (thick) Ethernet
interface. A cable must be connected to the system AUI Ethernet port and
to an Ethernet tap, or the test will fail the external loopback phase.
test net-tpe
Performs internal and external loopback tests on the twisted-pair
Ethernet (TPE) interface. A cable must be connected to the system TPE
port and to a TPE hub, or the test will fail the external loopback phase. 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 internal and external loopback tests on the auto-selected system
Ethernet interface. A cable must be attached to the system and to an
Ethernet tap or hub, or the external loopback test will fail.
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE 2–4
On-Board Diagnostics
(continued)
Test
Description and Requirements
test disk
Tests internal or external SCSI disks that have a self-diagnostic program
contained in the drive controller. The drive must be spinning before this
test is executed or the test will fail. Enter a boot <disk alias> command to
cause the drive to spin up. (disk0 = SCSI target 0, disk1 = SCSI target
1, disk2 = SCSI target 2, disk and disk3 = SCSI target 3.)
test disk0
test disk1
test disk2
test disk
test cdrom
Performs a diagnostic self-test on the CD-ROM drive. The CD-ROM must
be set to SCSI target 6 and have a CD inserted or the test will fail.
test tape
Tests the SCSI tape drive by executing the drive self-test program. (tape
and tape0 = SCSI target 4, tape1 = SCSI target 5.)
test tape0
test tape1
test ttya
test ttyb
test keyboard
Test outputs an alphanumeric test pattern on the system serial ports.
(ttya = serial port A, ttyb = serial port B.) You must attach a terminal
to the tested port to observe the output.
This test executes the keyboard self-test. The four LEDs on the keyboard
should flash on at once, and this message is displayed: Keyboard Present.
Sundiag System Exerciser
Use the Sundiag System Exerciser to determine real-time use of system resources and
peripheral equipment such as Desktop Storage Modules and External Storage
Modules. The Sundiag System Exerciser verifies that the system is functioning
properly. For information about how to use the Sundiag System Exerciser, see the
Sundiag User’s Guide.
If Sundiag passes, the system is operating properly. If Sundiag fails, the error
messages should indicate the part of the system that has failed. If the error messages
are not descriptive enough, you may need to run POST or the SunDiagnostic
Executive.
Note - The Sundiag System Exerciser is not applicable to the SPARCclassic X
terminal.
Troubleshooting Overview
19
Forth Toolkit
The Forth Toolkit is a basic diagnostic utility and system interface. If there is any
problem with your operating system, the Forth Toolkit automatically starts, as
indicated by the appearance of the ok prompt.
You can also choose to access the Forth Toolkit by halting the system. For
information on how to access the Forth Toolkit, see Appendix C.
For extensive information about tests you can run from the Forth Toolkit, see Open
Boot Command Reference.
SunDiagnostic Executive
The SunDiagnostic Executive is an independent operating system. It runs exhaustive
subsystem tests that are independent of the normal operating system. Run the
SunDiagnostic Executive if all POSTs pass, but your system still has a problem. For
information about POST, see “Power-On Self-Test (POST)” on page 21. The
SunDiagnostic Executive is described in the SunDiagnostic Executive User’s Guide for
the SPARCstations.
Note - The SunDiagnostic Executive is not applicable to the SPARCclassic X terminal.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
CHAPTER
3
Power-On Self-Test (POST)
This chapter describes the Power-On Self-Test (POST) for normal, full, and
abbreviated modes, available with your SPARCclassic and SPARCstation LX.
4 “Power-On Self-Test (POST)” on page 21
4 “Normal Mode” on page 23
4 “Full Diagnostic Mode” on page 24
4 “Abbreviated Diagnostic Mode” on page 24
4 “Tests the POST Runs” on page 25
4 “POST Error Messages” on page 28
4 “Status Lights (LEDs) and Indicators” on page 29
The Power-On Self-Test (POST) diagnostics reside in the Open Boot PROM located
on the system board. There are two POST modes: Normal and Diagnostic.
Power-On Self-Test (POST)
The Power-On Self-Test (POST) runs when you turn on the system unit power switch
and any of the following conditions apply:
4 Keyboard is disconnected.
4 Stop-d keys are held down when you turn on the power.
4 diag-switch? NVRAM parameter is set to true.
The POST comprises a sequence of tests designed to evaluate the major hardware
components of the main logic board in the short time before the operating system is
booted. The POST does not perform extensive testing on any component of the main
logic board. Only major failures can be detected by the POST.
21
Four different LEDs on the keyboard are used to indicate the progress and results of
the POST. These LEDs are on the Caps Lock, Compose, Scroll Lock, and Num Lock
keys, as shown in Figure 3–1. To indicate the beginning of the POSTs, the four LEDs
briefly light all at once. The monitor screen remains blank, and the Caps Lock LED
flashes for the duration of the POST.
Figure 3–1
Arrangement of Type-5 Keyboard Diagnostic LEDs
If the system fails any POST, one of the LEDs will light to indicate the nature of the
problem. The LED may be lit continuously, or for just a few seconds. Table 3–1
provides the meaning of each diagnostic LED.
TABLE 3–1
Interpreting the Keyboard Diagnostic LEDs
Diagnostic LED
Num Lock LED is lit.
Scroll Lock LED is lit.
Failed Part
Main logic board
NVRAM
Compose LED is lit.
DSIMM U0303 or U0304
Compose LED is lit
Last installed memory bank
(ROM 2.14 or later).
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Note - The Caps Lock LED is not used as a failure indicator; it flashes on and off to
indicate that the POSTs are running. The keyboard LED diagnostics feature described
here applies only to a SPARCclassic or SPARCstation LX system with a Sun Type-5
keyboard connected to its keyboard port. The LED diagnostics feature does not apply
if a different keyboard is connected to the keyboard port, or if a terminal and its
keyboard are used as a main console instead of a monitor and Sun Type-5 keyboard.
If the system passes all the POSTs, all four LEDs light again and then go off. Next
the system banner appears on the screen. The SPARCstation banner is shown as an
example; the SPARCclassic X terminal banner will be different. From this point on,
the keyboard LEDs assume their normal functions (that is, you should no longer
interpret the LEDs as diagnostic error indicators).
Figure 3–2
SPARCstation System Banner
Following the system’s successful initialization, the operating system is booted
automatically—unless the NVRAM configuration options specify otherwise.
You can retrieve more detailed POST failure information by connecting a terminal to
the ttya serial port. If you connect a terminal, you must set the NVRAM parameter
diag-switch? to true. For more information about the NVRAM parameters, see
Table 2–1. Test failure messages are displayed on the system monitor whether or not
the system is in Diagnostic mode. However, it may be easier to understand the
failure message output when it is accompanied by more detailed POST progress
messages available via the ttya serial port.
An example of a POST failure message output over the ttya serial port is shown
below.
FAILURE:
NVRAM
(f2000003)
Battery Failure, Exp = 00000000
Obs = 0000000a
Normal Mode
Under Normal mode, when the system is turned on, control is sent to the Open Boot
PROM. Depending on the options set in the Open Boot PROM, for example if
Power-On Self-Test (POST)
23
autoboot is enabled (set to true), the operating system will load. Diagnostic testing
is not run.
Full Diagnostic Mode
Diagnostic mode, is the mode which tests the major hardware system board
components and, if the POST is successful, probes the installed SBus modules.
Diagnostic mode runs if one of these conditions is met:
4 You press and hold the Stop-d keys while you turn the on the power
4 You set the diag-switch? NVRAM parameter to true in the Open Boot PROM
4 You disconnect the keyboard and you set the diag-switch? NVRAM parameter
to true in the Open Boot PROM
Note - POST does not perform extensive testing on any system board component.
POST detects only major failures.
To view error messages returned by POST, connect a terminal to serial port A or use
a tip connection to another workstation.
If you do not connect a terminal to serial port A or use a tip connection, the screen
will be blank during the POST Diagnostic mode. In this case, use the keyboard LEDs
to display error conditions. See “Status Lights (LEDs) and Indicators” on page 29.
Abbreviated Diagnostic Mode
A brief Power-On Self-Test (POST) is run if you disconnect the keyboard and you set
the diag-switch? NVRAM parameter to false in the Open Boot PROM. The brief
Power-On Self-Test is silent (no progressive test messages are printed out). If an error
or errors occur during the abbreviated Power-On Self-Test, all error messages are
displayed on the TTY or tip window.
Setting Up a tip Connection to Another
Workstation
You can use the serial port on your SPARCstation to connect to another Sun
workstation (either the same type of SPARC system or a different type of Sun
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
workstation or server system). This connection lets you use a shell window on the
Sun workstation as a terminal to the SPARCstation 10 being tested.
The tip method is recommended, because it lets you use SunOS windowing and
operating system features to help you work with the boot PROM.
To make a tip connection, follow these steps:
1. Connect the system’s serial port (ttya) to another Sun workstation ttya 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 lines to the file /etc/remote:
hardwire:\
:dv=/dev/ttya:br#9600:el=^C^S^Q^U^D:ie=%$:oe=^D:
3. In a Shell Tool window on the Sun workstation, type tip hardwire. (Some
commands will not work properly in a Command Tool window.)
The system will reply connected.
hostname% tip hardwire
connected
The Shell window is now a tip window directed to the Sun workstation serial
port.
4. When you are finished running POST and want to disconnect the tip window,
type kill -9 and the process ID number of the tip hardwire process.
hostname% kill -9 PID# of tip hardwire process
Tests the POST Runs
Following is a sample listing of the full diagnostic mode tests completed by POST.
Power-On Self-Test (POST)
25
TABLE 3–2
Listing of POST Tests
MMU Context Table Reg Test
MMU Context Register Test
MMU TLB Replace Ctrl Reg Tst
MMU Sync Fault Stat Reg Test
MMU Sync Fault Addr Reg Test
MMU TLB RAM NTA Pattern Test
MMU TLB CAM NTA Pattern Test
IOMMU SBUS Config Regs Test
IOMMU Control Reg Test
IOMMU Base Address Reg Test
IOMMU TLB Flush Entry Test
IOMMU TLB Flush All Test
SBus Read Time-out Test
EBus Read Time-out Test
D-Cache RAM NTA Test
D-Cache TAG NTA Test
I-Cache RAM NTA Test
I-Cache TAG NTA Test
Memory Address Pattern Test
FPU Register File Test
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE 3–2
Listing of POST Tests
(continued)
FPU Misaligned Reg Pair Test
FPU Single-precision Tests
FPU Double-precision Tests
FPU SP Invalid CEXC Test
FPU SP Overflow CEXC Test
FPU SP Divide-by-0 CEXC Test
FPU SP Inexact CEXC Test
FPU SP Trap Priority > Test
FPU SP Trap Priority < Test
FPU DP Invalid CEXC Test
FPU DP Overflow CEXC Test
FPU DP Divide-by-0 CEXC Test
FPU DP Inexact CEXC Test
FPU DP Trap Priority > Test
FPU DP Trap Priority < Test
PROC0 Interrupt Regs Tests
Soft Interrupts OFF Test
Soft Interrupts ON Test
PROC0 User Timer Test
PROC0 Counter/Timer Test
Power-On Self-Test (POST)
27
TABLE 3–2
Listing of POST Tests
(continued)
DMA2 E_CSR Register Test
LANCE Address Port Tests
LANCE Data Port Tests
DMA2 D_CSR Register Test
DMA2 D_ADDR Register Test
DMA2 D_BCNT Register Test
DMA2 D_NADDR Register Test
ESP Registers Tests
DMA2 P_CSR Register Test
DMA2 P_ADDR Register Test
DMA2 P_BCNT Register Test
PPORT Registers Tests
NVRAM Access Test
TOD Registers Test
POST Error Messages
The POST error messages returned to the terminal are self-explanatory. For example,
if no DSIMM is installed in the system, POST will tell you that no DSIMM is
installed and the slot number of the SIMM slot. Use the error messages returned by
POST to troubleshoot the system.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Status Lights (LEDs) and Indicators
The LED at the front of the chassis lights up when the system is operating normally.
Figure 3–3 shows the location of the system LED. Chapter 4,” shows flow diagrams
of actions to take when the system LED is not lit.
Figure 3–3
System Power LED on Front of System
This section describes the keyboard LED sequences displayed at power up when
POST fails. If a failure occurs in POST, the keyboard displays a specific LED pattern.
See Figure 3–4 and Table 3–1. During normal system operation, the LEDs should not
be interpreted as diagnostic error indicators.
Following the system initialization, the operating system boots automatically, unless
the NVRAM configuration options specify not to do so.
Note - The Caps Lock key LED, located just above the left-hand Shift key, is not used
as a power-on test failure indicator, but flashes on and off while POST is running.
Power-On Self-Test (POST)
29
Figure 3–4
Arrangement of the Type-5 Keyboard LEDs
If the Caps Lock key fails to flash on and off after you have pressed and held the
Stop-d keys when you power on the system, POST failed. See “System Board Test”
on page 35, for troubleshooting information.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
CHAPTER
4
Troubleshooting Procedures
This chapter describes how to troubleshoot SPARCclassic and SPARCstation LX
system problems. Each problem is described, and a set of procedures is provided for
a solution to the problem.
4 “No Video Output on the System Monitor” on page 32
4 “Power-On Does Not Succeed” on page 33
4 “Disk Drive Errors” on page 36
4 “Determining Faulty DSIMM Locations” on page 37
Table 4–1 describes commonly encountered troubleshooting problems, and tips for
solving them.
TABLE 4–1
Troubleshooting Tips
Problem
Action
LED on front of system is not lit.
Verify that the power switch is turned on and that the
power cord is connected. If both the power switch and
the power cord are connected, shut down the system
and verify that the LED cable is connected. If the LED
cable is connected, the power supply is defective.
Replace the power supply. See Chapter 8.
Disk drive fails to boot or does not
respond.
Shut down the system. The SCSI controller may be
defective. See “Verifying the Built-In SCSI Controller”
on page 36.” If the SCSI controller is OK, verify that
SCSI ID jumpers are set correctly and that every disk
drive on the SCSI bus is set to a different SCSI
address. Verify that the configuration jumpers on the
disk drive are set correctly. See Chapter 9.
31
TABLE 4–1
Troubleshooting Tips
(continued)
Problem
Action
Operating system does not
recognize disk drive at boot up.
Shut down the system. Verify that SCSI ID jumpers
are set correctly and that every disk drive on the SCSI
bus is set to a different SCSI address. Verify that the
configuration jumpers on the disk drive are set
correctly. See Chapter 9.
No video output on monitor.
Verify that the power cord is connected. Use a Volt
Ohmmeter (VOM) to check voltages. See “No Video
Output on the System Monitor” on page 32.
Slow disk drive response.
If many SCSI devices are connected to the same SCSI
bus and if some of these devices are “fast SCSI”
devices, you can install an FSBE/S SBus card to the
“fast SCSI” devices to speed up performance.
Read, write, or parity error
reported by the operating system
or applications.
Replace the disk drive indicated by the failure
message. The operating system identifies the internal
disk drive 0 (SCSI target ID 3) as sd0 and internal
disk drive 1 (SCSI target ID 1) as sd1.
Power on does not succeed. LEDs
on keyboard do not light and there
is no tone from the keyboard when
you turn on the system power.
The power supply may be defective. See “Power
Supply Test” on page 33.
Power on does not succeed. The
system fails to initialize but the
LEDs on the keyboard light and
there is a tone from the keyboard.
The system board may be defective. See “System
Board Test” on page 35.
No Video Output on the System Monitor
1. Check that the power cord is connected to the monitor and to the wall outlet.
2. Verify that the wall outlet is supplying AC power to the monitor.
Use a Volt Ohmmeter (VOM).
3. Verify that the video cable connection is secure between the monitor and the
system video output port.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Use a VOM to perform the continuity test on the video cable.
If the power cord and video cable connection are good and there is still no video
output, reseat the video card for the monitor.
4. If the monitor power supply is internally fused, check the fuse.
The fuse could be blown.
Power-On Does Not Succeed
1. Turn off the system power switch.
2. Check that the system power cord is properly connected to the system rear
panel power receptacle and to the wall outlet.
3. Verify with a VOM that the wall outlet is supplying AC power to the system.
4. Turn the system power switch on and observe the keyboard.
The LEDs on the keyboard should briefly light. You should hear a tone from the
keyboard.
If you hear no tone or see no lights on the keyboard, the system’s power supply
may be defective. See “Power Supply Test” on page 33.
If you hear a tone and see lights on the keyboard, but the system still fails to
initialize, see “System Board Test” on page 35.
5. If the system power supply is internally fused, check the fuse.
The fuse could be blown. If the power supply is working, you should hear the
fans humming.
Power Supply Test
1. Use a VOM (Volt Ohmmeter) to check the power supply output voltages.
Place the VOM negative probe on one of the logic ground pins in the connector,
and test the +12V, –12V, and +5.1V power pins individually with the positive
probe (pins 1 through 7). See Figure 4–1.
Troubleshooting Procedures 33
Note - The power supply connector (J1401 for SPARclassic and SPARCclassic X
or J1601 for SPARCstation LX) must remain connected to the system board.
2. Replace the power supply assembly if any of the voltages are not present.
See “Power Supply” on page 59.
Figure 4–1
Power Supply Connector
Table 4–2 shows the pin assignments on the power supply connector.
TABLE 4–2
34
Power Supply Connector Pin Assignments
Pin
Description
Pin
Description
1
+5 Vdc
7
+5 Vdc
2
+5 Vdc
8
+5 Vdc
3
Ground
9
Ground
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE 4–2
Power Supply Connector Pin Assignments
(continued)
Pin
Description
Pin
Description
4
Ground
10
Ground
5
+12 Vdc
11
+12 Vdc
6
POK
12
-12 Vdc
System Board Test
1. Connect a terminal to serial port A or use a tip connection to another
workstation to receive additional POST failure information.
To set up a tip connection to another workstation, see “Setting Up a tip
Connection to Another Workstation” on page 24.
2. Press and hold the Stop-d keys. While holding the keys down, turn the system
power switch on. Watch the keyboard LEDs.
a. The Caps Lock key on the keyboard should flash on and off, indicating that
the system is running the Power-On Self-Test (POST).
If the Caps Lock key fails to flash on and off after you have pressed and held
the Stop-d keys, POST failed.
b. To further troubleshoot the system board, see “Caps Lock Key Fails to Flash
On and Off During POST” on page 35.
3. 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.
4. Replace the defective part indicated.
Caps Lock Key Fails to Flash On and Off During POST
1. Remove optional SBus cards and SIMMs.
Leave a pair of SIMMs in Bank 1.
2. Run POST again before replacing the system board.
Troubleshooting Procedures 35
Remove all other parts to eliminate the possibility that parts you removed could
cause the POST failure.
Disk Drive Errors
Table 4–3 presents disk drive error conditions and corrective actions.
TABLE 4–3
Troubleshooting Disk Drive Errors
Symptom
Corrective Action
Read, write, or parity error
reported by the operating system
or applications.
Replace the disk drive indicated by the failure
message. The operating system identifies the internal
disk drive 0 (SCSI target ID 3) as sd0 and internal
disk drive 1 (SCSI target ID 1) as sd1.
Drive fails to boot or does not
respond to commands.
SCSI controller may be defective. See “Verifying the
Built-In SCSI Controller” on page 36. If SCSI controller
is OK, the SCSI ID jumpers or configuration jumpers
may be set incorrectly. Refer to Chapter 9.
Slow disk drive response.
If many SCSI devices are connected to the same SCSI
bus and if some of these devices, such as the
1.05-Gbyte disk drive, are “fast SCSI” devices, you
may want to install an FSBE/S SCSI host adapter card
to the “fast SCSI” devices and put these “fast SCSI”
devices on a separate SCSI bus to speed up disk drive
response.
Verifying the Built-In SCSI Controller
To check whether the built-in SCSI controller is defective, test the 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 178.
1. At the ok prompt, type probe-scsi.
See the following example.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
ok probe-scsi
Target 1
Unit 0 Disk SEAGATE ST1480
Target 3
Unit 0 Disk SEAGATE ST1480
SUN0424
Copyright
(c) 1991
SUN0424
Copyright
(c) 1991
a. If the disk drive responds and a message is displayed, the system SCSI
controller has successfully probed the devices.
This indicates that the system board is working correctly.
b. If a disk doesn’t respond:
i. Verify that the SCSI target ID is set correctly. Make sure that every SCSI
disk and other SCSI device on the SCSI bus has a different SCSI target
ID.
ii. Verify that all SCSI cables and the SCSI terminator are connected
securely.
iii. Check the SCSI cables to make sure there are no bent pins.
iv. If you have not found the problem, after checking the previous causes,
replace the unresponsive drive.
v. If the problem still occurs after replacing the drive, replace the system
board.
vi. If replacing the disk drive and the system board does not correct the
problem, replace the internal disk drive cable assembly.
Determining Faulty DSIMM Locations
The Sundiag System Exerciser, SunDiagnostic Executive, and POST diagnostics can
report memory errors encountered during program execution. For general
information about diagnostics see Chapter 2, “Troubleshooting Overview.” Memory
error messages on the video monitor usually indicate a physical memory address
where the error was detected.
Troubleshooting Procedures 37
Depending on the diagnostic program you are running, a DSIMM location number
(“U” number) or a memory address may be displayed. If the error message displays
the location number (see Figure 4–2 for DSIMM location numbers), follow the
instructions in “Removing a DSIMM” on page 120 for removing the defective
DSIMM at the numbered location. To replace the DSIMM, follow the directions in
“Replacing a DSIMM” on page 122.
If the error message displays a physical memory address, consult Table 4–4 or Table
4–5—depending on your DSIMMs’ capacity—to see which memory bank contains
the physical address.
Then, look up the last digit of the address in Table 4–6 to find out which of the two
DSIMMs in that bank caused the memory error.
For example, in a system using 16-Mbyte DSIMMs, if an error is detected at physical
memory address 12fe958, Table 4–4 shows that the error occurred in memory bank 1
(DSIMMs U0304 and U0303). Table 4–6 then shows that the defective DSIMM is in
slot U0304. Follow the instructions in “Removing a DSIMM” on page 120 for
removing the defective DSIMM at that location. Then, to install the replacement,
follow the instructions in “Replacing a DSIMM” on page 122.
Figure 4–2
38
DSIMM Slot Locations
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE 4–4
Physical Memory Address Ranges for 4-Mbyte and 16-Mbyte SIMMs
Physical Memory Address Ranges
Bank
SIMM #
4-Mbyte SIMMs
16-Mbyte SIMMs
1
U0304
0000000 through 07FFFFF
0000000 through 1FFFFFF
1
U0303
0000000 through 07FFFFF
0000000 through 1FFFFFF
2
U0301
2000000 through 27FFFFF
2000000 through 3FFFFFF
2
U0302
2000000 through 27FFFFF
2000000 through 3FFFFFF
3
U0402
4000000 through 47FFFFF
4000000 through 5FFFFFF
3
U0401
4000000 through 47FFFFF
4000000 through 5FFFFFF
TABLE 4–5
Physical Memory Address Ranges for 1-Mbyte and 2-Mbyte SIMMs
Physical Memory Address Ranges
Bank
SIMM #
1-Mbyte SIMMs
2-Mbyte SIMMs
1
U0304
0000000 through 01FFFFF
0000000 through 01FFFFF
1
U0303
0000000 through 01FFFFF
0400000 through 05FFFFF
2
U0301
2000000 through 21FFFFF
2000000 through 21FFFFF
2
U0302
2000000 through 21FFFFF
2400000 through 25FFFFF
3
U0402
4000000 through 41FFFFF
4000000 through 41FFFFF
3
U0401
4000000 through 41FFFFF
4400000 through 45FFFFF
TABLE 4–6
Determining the Defective DSIMM
If the physical address ends in . . .
The defective DSIMM is in . . .
0, 1, 2, 3, 8, 9, A, or B
U0304, U0301, or U0402
4, 5, 6, 7, C, D, E, or F
U0303, U0302, or U0401
Troubleshooting Procedures 39
TABLE 4–6
Determining the Defective DSIMM
(continued)
Note - Both DSIMMs in a memory bank have the same physical address range. The
last digit in the physical address reported determines which of the two DSIMMs in a
bank caused the memory error (see Table 4–6).
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CHAPTER
5
Safety and Tools Requirements
This chapter describes standards, safety procedures, and precautions you should
follow whenever you need to replace or remove assemblies or subassemblies from
your system.
4 “Safety Requirements” on page 41
4 “Symbols” on page 42
4 “System Precautions” on page 43
4 “Tools Required” on page 43
Safety Requirements
For your protection, observe the following safety requirements:
4 Follow all cautions, warnings, and instructions marked on the equipment.
4 Ensure that the voltage and frequency rating of the power outlet to be used
matches the electrical rating labels on the system.
4 Use properly grounded power outlets.
To protect both yourself and the equipment, observe the safety precautions listed in
Table 5–1.
41
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
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 must be attached.
Wrist strap
Electrostatic
Discharge (ESD)
Wear a wrist strap when handling printed circuit
boards, drives, or other components such as SIMMs.
ESD mat
ESD
An approved antistatic mat provides protection from
static damage when used with a wrist strap. The mat
also cushions and protects small parts that are
attached to printed circuit boards. Chapter 12, lists the
part number of the mat.
Printed circuit
boards
ESD
Handle a printed circuit board by the edges only.
Store a board in an antistatic bag.
Cover
System damage
and overheating
Replace the cover after performing service on the
system.
SBus slot filler
panels
System damage
and overheating
Install filler panels in all unused SBus slots. Openings
on the back of system board reduces the cooling
capability of the system.
Symbols
The following symbols mean:
Caution - 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.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
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 resulting damage to the equipment.
Caution - Hot surface. Avoid contact. Surfaces are hot and may cause personal
injury if touched.
System Precautions
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 contained in this document must be performed by trained maintenance
providers. Only people who have been trained at the Sun Microsystems®® training
facilities (or at Sun Microsystems affiliates) and have been certified as required by
local and national laws are considered qualified.
Caution - Before you begin, carefully read each of the procedures in this manual. If
you have not performed similar operations on comparable equipment, do not attempt
to perform these procedures.
Tools Required
To remove and replace customer replaceable units (CRUs), you will need the
following tools and materials:
4 Small Phillips-head screwdriver
4 Small flat-blade screwdriver
4 Wrist strap
4 Antistatic surface
4 Volt Ohmmeter (VOM) for checking voltages and continuity
4 Needlenose pliers
4 Conductive foam to store chips
4 Container for screws
Safety and Tools Requirements
43
You will need an antistatic surface on which to place static-sensitive parts such as
boards, cards, modules, and SIMMs. The replacement procedures will let you know
when you need to place a part on an antistatic surface. The following items can be
used as antistatic surfaces:
4 Bag that is used to wrap a Sun replacement part.
4 Shipping container that is used to package a Sun replacement part.
4 Inner surface of the system unit cover.
4 Sun electrical static discharge (ESD) mat with Sun logo. Contact your Sun sales
representative to purchase it.
4 Disposable ESD mat. You can purchase it through your Sun sales representative.
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CHAPTER
6
Power Off and On
This chapter explains steps to perform before removing a customer replaceable unit
(CRU).
4 “Powering Off the System” on page 45
4 “Powering On the System” on page 48
Powering Off the System
Before you begin any removal or replacement procedure, you must halt the system
in an orderly manner. The procedure depends on whether your system is working
normally or not, as described in the next sections.
Caution - When the operating system or any other standalone program has already
booted, do not use the Stop-a keys to halt the system. Using the Stop-a keys to abort
program execution can damage data files.
Powering Off When the System Is Working
Normally
To halt your system when it is working normally:
1. Save all your work.
45
Consult your software documentation for instructions on ending a work session
and saving your files. If you do not save your work, you could lose it when you
switch off the power.
2. Return to the operating system environment.
If you are in a windowing environment, exit from it and wait for the system
prompt to appear. See the documentation supplied with your windowing system.
Note - On a SPARCclassic X terminal, just click SELECT on the Halt button in the
Terminal Controls window. The system responds with an OK> prompt. You can
then skip to Step 5 of this procedure.
3. Halt the operating system.
See the documentation supplied with your operating system for instructions on
how to halt it.
For example, if you are using the Solaris®® 2.x operating system:
1. At the system prompt, type su and press Return.
2. Type your superuser password and press Return.
4. To inform other system users of your intentions, and to then halt the system
use Step 3.
5. To halt the system immediately, continue with Step 3.
a. Type /usr/sbin/shutdown +5 and press Return.
The example above uses 5 minutes for a warning period to other system users.
Use appropriately chosen switch settings to inform other system users of your
intentions (see shutdown(1)). Continue with Step 4.
b. Type /usr/sbin/init 0 and press Return.
For example, to halt the system immediately type:
nevada% su
Password: welcome
(Password
does not appear on screen.)
nevada# /usr/sbin/init 0
6. After halting the operating system, wait for either the > or ok prompt.
The system displays system halt messages followed by either the > or ok prompt.
When either prompt appears, you can safely turn off the power in the proper
sequence.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
7. Turn off the power to the system components in this order:
1. External drive units (if you have any)
2. System unit
3. Monitor
Powering Off When the System Does Not
Respond Normally
To halt a system that is hung, or frozen, and unresponsive to commands:
1. If your system is on a network, wait a few minutes before proceeding.
Your system’s slow response may be due to network problems or delays. Check
with the person in charge of your network. If the response is not due to the
network, go to the next step.
2. Press Stop-a (or Break).
TM
TM
If you use a Wyse®® WY-50 TM , VT100 TM , or compatible terminal as the console
with your SPARCstation system unit, press Break instead of Stop-a.
Note - If the system does not respond to the mouse and keyboard, pressing
Stop-a will not be effective. You may have to turn the power off, wait at least 10
seconds, and turn the power on again. Then try pressing Stop-a once more.
Note - Steps 3 through 6 are not necessary for the SPARCclassic X terminal.
When the ok or > prompt appears, boot the operating system.
Enter boot at the ok prompt or b at the > prompt.
3. When you see the login prompt, log in to the system with your user name and
password.
4. Halt the operating system.
See the documentation supplied with your operating system for instructions on
how to halt it.
For example, if you are using the Solaris 2.x operating system:
1. At the system prompt, type su and press Return.
2. Type your superuser password and press Return.
3. Type /usr/sbin/init 0 and press Return.
For example, to halt the system immediately type:
Power Off and On
47
nevada% su
Password: welcome
(Password
does not appear on screen.)
nevada# /usr/sbin/init 0
5. After halting the operating system, wait for either the > or ok prompt.
The system displays system halt messages followed by either the > or ok prompt.
When either prompt appears, you can safely turn off the power in the proper
sequence.
6. Turn off the power to the system components in this order:
a. External drive units (if you have any)
b. System unit
c. Monitor
Powering On the System
Caution - Before turning on power to your system, be sure to close the system unit.
It is not safe to operate your SPARCstation while the system unit is open.
Caution - These devices are equipped with a 3-wire grounded power cord. To
reduce the risk of electrical shock, always plug the power cord into a properly
grounded power outlet.
Caution - Always allow 10 seconds between turning off the power and turning it
back on again. This pause prevents possible damage to power supply components in
your system unit.
After turning off the power to replace a part, restarting the system is relatively
simple:
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
1. Reconnect the cables.
See “Reconnecting the External Cables” on page 57.
2. Turn on the power in this sequence:
1. External drive units (if any), starting with the unit that is furthest electrically
from the system unit
2. Monitor (if you turned it off)
3. Desktop SPARCstation system unit
3. Boot the operating system.
The operating system may start to boot automatically, or you may need to enter a
command at the system prompt. What you do next depends on the operating
system software you are using. Consult the documentation supplied with your
operating system for instructions on booting and logging in to your system.
Power Off and On
49
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CHAPTER
7
Internal Access
This chapter describes how to access the subassemblies inside the system unit, and
how to close the system unit after you have finished.
4 “Disconnecting the External Cables” on page 51
4 “Opening the System Unit” on page 52
4 “Attaching the Wrist Strap” on page 53
4 “Closing the System Unit” on page 55
4 “Reconnecting the External Cables” on page 57
Disconnecting the External Cables
Detach all cables connected to the rear of the system unit. Take care to remember
where each cable attaches to the system unit.
Note - Do not disconnect the power cord from the system unit’s power receptacle.
The power cord should remain connected to a grounded power outlet.
To disconnect the SCSI cable:
1. Press in on both the finger clips of the connector that attaches the device to the
system unit.
2. Pull the connector off.
51
Opening the System Unit
Caution - Before opening the system unit, make sure the system power switch is in
the Standby position. The green LED on the front of the system unit should not be
lit, and the fan should not be running. When the system power switch is in the
Standby position, and the AC power cord remains connected to a power outlet,
hazardous AC voltage is still present in the power supply primary. Do not attempt to
service the power supply under these conditions. Disconnect the AC power cord
prior to handling the power supply. When servicing any other system component,
the AC power cord should remain connected; it poses no safety hazard.
To open the system unit and gain access to the CRUs inside it:
1. Make sure that the system power switch is in the Standby position.
The green LED on the front of the system unit should not be lit, and the fan
should not be running. Leave the AC power cord connected to both the system
unit and wall outlet.
2. Position the system on the table with the rear panel facing you.
Leave enough space to lay the unit top flat on the table behind the unit bottom.
3. Remove the screw that secures the lock block to the back panel (see Figure 7–1).
4. Grasp the unit top at its rear corners and carefully open the system unit like a
suitcase (see Figure 7–1).
Lay the unit top flat on the table behind the unit bottom. The unit top and
bottom are still connected by the power and data cables leading from the disk
drive and power supply to the main logic board.
Note - The unit top contains the power supply and disk drive, and is the heavier
of the two sections.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 7–1
Opening the System Unit
Caution - When you are finished installing parts inside the system unit, be sure to
close the system unit before turning on the power. It is not safe to operate the system
unit while it is open. See “Closing the System Unit” on page 55 for instructions.
Attaching the Wrist Strap
A wrist strap (or grounding strap) provides grounding for static electricity between
your body and the chassis of the system unit. Electric current and voltage do not
pass through the wrist strap.
Before you handle any components inside the system unit, attach the wrist strap to
your wrist and to the metal casing of the power supply.
Internal Access
53
Caution - Boards and modules can be damaged by harmful electrical charges if you
do not wear a wrist strap. Parts that require the use of a wrist strap are packed with
one.
To attach a wrist strap:
1. Wrap the grounding strap twice around your wrist.
Make sure the adhesive side is against your skin.
2. Attach the end with the adhesive copper strip to the metal casing of the power
supply in the top of the system unit.
Figure 7–2
Attaching the Wrist Strap
To detach a wrist strap:
1. Unwrap the grounding strap from your wrist.
2. Detach the end with the adhesive copper strip from the metal casing of the
power supply in the top of the system unit.
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Closing the System Unit
To close the system unit:
1. Preparation.
a. Check that there are no loose tools or screws in the unit.
b. Check that all SBus cards and SIMMs are seated properly.
c. Check that all internal cable connections are tight.
d. Check that the power supply wiring is tucked inside the system to avoid
pinching the wiring when you close the system unit.
2. Detach and remove the wrist strap.
3. Grasp the unit top near the power supply (see Figure 7–3).
Rotate the unit top at a 15-degree angle and rotate your hand position so that
thumbs and fingers point up and the five interlock hooks can be aligned.
Note - The interlock hooks do not engage until the unit is lowered to a 45-degree
angle. Continue to hold the cover with your hands.
4. Reconnect the unit top and bottom (see Figure 7–3).
a. Rest the front edges together to connect the interlock hooks by pushing
gently toward the back of the unit.
b. As you lower the unit top, continue to push back to secure the connection.
The unit top will rest slightly forward.
c. Gently push the unit top back a few millimeters until the unit top and
bottom are aligned.
5. Attach the lock block.
Attach the lock block by inserting the PEM screw through the block on the
outside, through the security loop on the inside, and into the power supply (see
Figure 7–3). Tighten the screw with a screwdriver. Be careful not to overtighten
the screw.
Internal Access
55
Figure 7–3
56
Closing the System Unit
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Reconnecting the External Cables
Refer to Figure 7–4 to reconnect the system cables.
Figure 7–4
Reconnecting System Components
Internal Access
57
See the Desktop SPARC Hardware Owner’s Guide, or Using a SPARCclassic X
Terminal for complete details about cabling. To turn on power to the system, See
“Powering On the System” on page 48.
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CHAPTER
8
Major Subassemblies
This chapter describes how to remove and replace the system unit’s major
subassemblies.
4 “Power Supply” on page 59
4 “Speaker/Power LED Assembly” on page 62
4 “System I/O Board” on page 65
Power Supply
The power supply is a self-contained metal assembly in the system unit top just
behind the disk drive mounting bracket (see Figure 9–12).
The power supply is held in place by four hooks in the unit top that mate with four
slots in the power supply. In addition, the screw at the rear of the system unit that
holds the top and bottom halves of the unit together also retains the power supply.
The power supply wiring harness branches into four separate “power cables.” A
12-pin power cable connects to the main logic board in its right front corner (see
Figure 9–13). Nearby, a 3-pin cable provides the keyboard soft power-on signal from
the main logic board to the power supply. Two 4-pin power cables supply power to
the hard disk drive and diskette drive (if present).
The power supply is auto-sensing and will operate with input voltage of 100-120 Vac
or 200-240 Vac without adjustment. If the power supply fails to operate, replace it.
Figure 8–1 shows how to remove and replace the power supply.
59
Removing the Power Supply
To remove the power supply:
1. Prepare to work on the system as described in Chapter 7.
Halt the system and verify that the power LED is not lit and that the fan is not
running. Then open the system unit and attach a wrist strap as described in
“Attaching the Wrist Strap” on page 53.
2. Make sure that the system unit’s power is in the Standby position.
Make sure that the green LED at the front of the chassis is not lit and that the fan
in the power supply is not running.
3. Remove the disk drive mounting bracket.
The disk drive mounting bracket must be removed before the power supply can
be lifted out of the system unit. Follow the directions in “Removing the Disk
Drive Mounting Bracket” on page 91 for removing the disk drive mounting
bracket (ignore step 1 and the Caution that follows it).
4. Make sure that you disconnected the power supply wiring harness from the
diskette drive, hard disk drive, and main logic board.
5. Disconnect the system unit AC power cord and detach the wrist strap from the
power supply.
For this procedure, the power cord must not bee connected between the system
unit and the AC wall outlet.
Caution - Make sure that the system unit is unplugged from the AC power outlet
and that the power switch is in the Standby position before you remove, replace, or
install the power supply. Failure to take this precaution may result in severe
electrical shock.
6. Remove the power supply (see Figure 8–1).
Grasp the power supply firmly and slide it about 0.25 inch toward the front of
the unit to disengage it from the four hooks in the bottom of the system unit. Lift
the power supply straight up and out. If the power supply does not lift easily, be
sure that it has cleared the hooks.
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Figure 8–1
Removing and Replacing the Power Supply
Replacing the Power Supply
To install a new power supply:
1. Remove the faulty power supply as described in the previous section.
2. Install the new power supply.
1. Align the holes in the bottom of the power supply with the hooks in the
system unit top (see Figure 8–1).
2. Lower the power supply into the unit top as shown.
3. Properly position the power supply by pushing it firmly toward the rear of the
unit (about 0.25 inch) until it engages with the hooks.
3. Reattach the wrist strap to the metal casing of the new power supply.
Major Subassemblies
61
4. Connect the AC power cord between the system unit and an AC wall outlet to
provide the ground path for the wrist strap.
5. Reinstall the disk drive mounting bracket.
Reinstall the disk drive mounting bracket in front of the power supply. For
detailed instructions, see “Replacing the Disk Drive Mounting Bracket” on page
94.
6. Be sure to reconnect the power supply wiring harness to the diskette drive,
hard disk drive, and main logic board.
Connect the 12-pin and 3-pin connectors from the wiring harness to the power
connector and keyboard soft power-on connector on the main logic board.
Connect the 4-pin connectors from the harness to the hard disk drive and diskette
drive (if present). Each connector is keyed to fit only one way.
7. Refer to Chapter 7 to perform the following procedures:
4 Detaching the wrist strap
4 Closing the system unit
4 Reconnecting system components
8. Refer to Chapter 6 to turn the power on.
After turning the power back on, check for proper operation of the system unit and
the newly installed power supply. If the newly installed power supply still does not
work properly, a problem may exist in the system unit, such as a blown component
or a short circuit.
Speaker/Power LED Assembly
This section describes the removal and replacement procedures for the speaker/
power LED assembly. This assembly is mounted on the right-hand side of the system
unit bottom (see Figure 8–8).
Removing the Speaker/Power LED Assembly
To remove the speaker/power LED assembly:
1. Prepare to work on the system as described in Chapter 6, and in Chapter 7.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Halt the system and verify that the power LED is not lit and that the fan is not
running. Then open the system unit and attach a wrist strap as described in
“Attaching the Wrist Strap” on page 53.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
2. Disconnect the speaker/LED cable from its connector on the main logic board.
For the connector location, see Chapter 11.
3. Squeeze the speaker assembly where indicated in Figure 8–2 and slide it up
and out of the system unit.
Caution - Do not touch or press on the speaker cone. You may damage the speaker
or the sound quality.
Major Subassemblies
63
Figure 8–2
Removing and Replacing the Speaker/Power LED Assembly
Replacing the Speaker/Power LED Assembly
To replace the speaker/power LED assembly:
1. Remove the faulty speaker/power LED assembly as described in the previous
section.
2. Squeeze the replacement speaker assembly where indicated in Figure 8–2 and
slide it down into its channel guides until it snaps into place.
Caution - Do not touch or press on the speaker cone. You may damage the speaker
or the sound quality.
3. Reconnect the speaker/LED cable to its connector on the main logic board.
The connector is keyed to fit only one way. For the connector location, see
Chapter 11.
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4. Refer to Chapter 7 to perform the following procedures:
4 Detaching the wrist strap
4 Closing the system unit
4 Reconnecting system components
5. Refer to Chapter 6 to turn the power on.
System I/O Board
The system I/O board is located in the bottom half of the system unit (see Figure
8–3). It provides all of the system’s I/O connectors through cutouts in the unit’s rear
panel. The main logic board plugs into the system I/O board.
Caution - Printed circuit boards are made of delicate electronic components that are
extremely sensitive to static electricity. Ordinary amounts of static from your clothes
or work environment can destroy the boards. Handle boards only by the
non-conducting edges. Do not touch the components themselves or any metal parts.
Always wear a grounding (wrist) strap when handling the boards. Attach the wrist
strap to the metal casing of the power supply at the rear of the unit top.
Removing the System I/O Board
To remove the system I/O board:
1. Prepare to work on the system as described in Chapter 6, and in Chapter 7.
Halt the system and verify that the power LED is not lit and that the fan is not
running. Then open the system unit, detach all peripherals, and attach a wrist
strap as described in “Attaching the Wrist Strap” on page 53.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Major Subassemblies
65
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running.
Caution - When the system power switch is in the Standb position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
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Figure 8–3
System I/O Board and Unit Bottom
2. Place an antistatic mat, shiny side down, next to the system unit.
3. Remove any SBus cards installed in the system unit.
See “SBus Cards” on page 107 for removal procedures.
4. Disconnect all cables attached to the main logic board.
For connector locations, choose the appropriate board illustration in Chapter 11.
1. Disconnect the 12-pin power supply cable from its mating connector by
squeezing the clip at the end of the cable and pulling straight up.
Major Subassemblies
67
2. Disconnect the keyboard soft power-on cable from its connector next to the
12-pin power supply connector.
3. Disconnect the LED/speaker cable from its mating connector on the main logic
board.
4. Disconnect the diskette drive and hard disk drive data cables from their
connectors at the front of the main logic board.
5. Remove the main logic board.
1. Pull the main logic board extractor lever toward the front of the system unit to
disconnect the main logic board from the system I/O board (see Figure 8–4).
2. Raise the speaker assembly to allow removal of the main logic board
(see Figure 8–5).
3. Grasp the board by the SBus connectors with both hands. Tilt the board
slightly to avoid the speaker assembly and lift it up and out of the system unit
(see Figure 8–6). Avoid handling any of the delicate electronic components or
touching any of the circuit board traces.
4. Place the main logic board on an antistatic mat.
Figure 8–4
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Extracting the Main Logic Board
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 8–5
Raising the Speaker/LED Assembly
Major Subassemblies
69
Figure 8–6
Removing and Replacing the Main Logic Board
6. Remove the system I/O board.
1. On the SPARCclassic X terminal, pull the plastic connector covers off the
inactive ports to gain access to the screws.
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2. Use a small flat-blade screwdriver to remove the 10 screws that secure the
system I/O board to the system unit chassis (see Figure 8–7). Take care to
remember where each screw belongs.
3. Pull the system I/O board away from the back panel to remove it.
Figure 8–7
Removing the System I/O Board
Replacing the System I/O Board
To replace the system I/O board:
1. Replace the system I/O board.
a. Position the system I/O board so that its connectors protrude through their
respective openings in the system unit chassis.
b. Align the screw holes in the chassis with the holes in the system I/O board
and secure the board with the 10 screws provided (see Figure 8–7). (Replace
the plastic connector covers, if necessary.)
2. Reinstall the main logic board.
a. Grasp the board by the SBus connectors with both hands. Insert the main
logic board extractor lever through the rectangular cutout in the main logic
Major Subassemblies
71
board (see Figure 8–6). Avoid handling any of the delicate electronic
components or touching any of the circuit board traces.
b. Tilt the board to avoid the speaker assembly and lower it onto the floor of
the system unit.
c. Align the board’s edge connector with its mating connector on the system I/
O board.
d. Push the main logic board extractor lever toward the rear of the system unit
to plug the main logic board into the system I/O board (see Figure 8–8).
e. Lower the speaker assembly back to its original position.
3. Reconnect all cables that attach to the main logic board.
Each connector is keyed to fit only one way. For connector locations, see Chapter
11.
a. Connect the 12-pin connector from the power supply harness to its mating
connector on the main logic board.
b. Connect the 3-pin connector from the power supply harness to the keyboard
soft power-on connector on the main logic board.
c. Connect the LED/speaker cable to its mating connector on the main logic
board.
d. Connect the diskette drive and hard disk drive data cables to their
connectors at the front of the main logic board.
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Figure 8–8
Plugging in the Main Logic Board
4. Reinstall any SBus cards (if applicable).
See “Replacing SBus Cards” on page 110 for installation details.
5. Refer to Chapter 7” to perform the following procedures:
4 Detaching the wrist strap
4 Closing the system unit
4 Reconnecting system components
6. Refer to Chapter 6 to turn the power on.
Major Subassemblies
73
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CHAPTER
9
Storage Devices
This chapter includes information about how to replace the system storage drives.
4 “Hard Disk Drive” on page 75
4 “Disk Drive Bracket” on page 91
4 “Diskette Drive” on page 96
Hard Disk Drive
One 3.5-inch hard disk drive can be installed in the top section of the system chassis.
A 50-pin SCSI data cable and a 4-pin power cable connect to the rear of the drive.
The hard disk drive is mounted beside the optional diskette drive and can be
accessed without removing the disk drive mounting bracket.
Caution - The hard disk drive and diskette drive contain electronic components that
are extremely sensitive to static electricity. Ordinary amounts of static from your
clothes or work environment can destroy the components. Do not touch the
components themselves or any metal parts. Always wear a grounding strap when
handling these drives. Attach the strap to your wrist and to the metal casing of the
power supply.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
75
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
Removing a Hard Disk Drive
To remove a hard disk drive from the system unit:
1. Prepare to work on the system as described in Chapter 6, and in Chapter 7.
Halt the system and verify that the power LED is not lit and the fan is not
running. Then open the system unit and attach a wrist strap as described in
“Attaching the Wrist Strap” on page 53.
2. Place an antistatic mat, shiny side up, next to the system unit.
3. Disconnect the hard drive data cable from its connector on the main logic board.
See Figure 9–1 for the cable location.
4. Disconnect the hard drive power cable from the hard drive.
See Figure 9–1 for the cable location.
5. Disconnect the data cable from its connector on the hard drive.
Set the data cable aside for installation on the replacement drive.
6. Remove the four screws securing the hard drive to the drive bracket.
7. Lift the hard drive straight up to remove it from the system unit.
Place the drive on the antistatic mat. This completes the hard disk drive removal
process.
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Figure 9–1
Hard Disk Drive in the Disk Drive Bracket
Preparing a Hard Drive for Installation
To prepare a hard drive for installation, you must first verify that the SCSI ID
jumpers on the drive controller board are set correctly. After you are satisfied that the
SCSI ID jumpers are correct, follow the directions later in the chapter for installing
the hard drive.
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77
Verifying the Jumper Settings
The SCSI ID jumpers must be set to SCSI address 3. This is the factory default
setting, but you should verify the jumper settings.
The location of the SCSI ID jumpers depends on the type of drive shipped with your
system. Figure 9–2 through Figure 9–7 show the jumper locations and settings for the
various types of replacement drives. Note that only one of these illustrations applies
to your hard drive.
To verify the jumper settings on the hard drive:
1. Remove the replacement drive from its protective packaging and set it with the
component side up on the antistatic mat.
You now have access to the drive controller board.
2. Inspect the jumper settings.
a. Determine which illustration among Figure 9–2 through Figure 9–7 matches
your drive.
b. Compare the jumper settings in the figure to the settings on your drive.
c. If the settings are not the same, change them to match the settings in the
figure.
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Figure 9–2
Side
Jumper Settings for 207-Mbyte Drive With Jumpers on the Left-Hand
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79
Figure 9–3
Side
80
Jumper Settings for 207-Mbyte Drive With Jumpers on the Right-Hand
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 9–4
Jumper Settings for 424-Mbyte Drive
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81
Figure 9–5
Jumper Settings for Conner 535-Mbyte Drive
Table 9–1 describes the 535-megabyte Conner drive’s factory jumper settings.
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TABLE 9–1
535-Mbyte Conner Drive Configuration Jumpers
Pin Pair
Description
Factory Set
E1
SCSI ID address
Yes
E2
SCSI ID address
Yes
E3
SCSI ID address
No
E4
Wait spin disabled
No
E5
Disk power termination
Yes
E6
SCSI bus power termination
No
Figure 9–6
Jumper Settings for Seagate 535-Mbyte Drive
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83
Table 9–2 describes the 535-megabyte Seagate drive’s factory jumper settings.
TABLE 9–2
84
535-Mbyte Seagate Drive Configuration Jumpers
Abbreviation
Description
Factory Set
RS
Reserved
No
DS
Motor start delay
No
ME
Motor start is enabled at unit’s start command
Yes
WP
Write protect disabled
No
PE
Parity disabled
Yes
SS
Reserved
No
TP
Drive does not supply power termination to itself
No
TP
Drive does not supply power termination to the SCSI
bus
No
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 9–7
Jumper Settings for 1.0-Gbyte Drive (Part 370-1546)
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85
Figure 9–8
Jumper Settings for Seagate 1.0-Gbyte Drive
Table 9–3 describes the 1.0-gigabyte Seagate drive’s factory jumper settings.
TABLE 9–3
86
1.0-Gbyte Seagate Drive Configuration Jumpers
Abbreviation
Description
Factory Set
SS
(Reserved)
No
DS
Delayed start
No
ME
Motor enable
Yes
WP
Write protect
No
PE
Parity enable
Yes
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE 9–3
1.0-Gbyte Seagate Drive Configuration Jumpers
(continued)
Abbreviation
Description
Factory Set
TE
Termination enable
No
TP
Termination power from
drive
No
TP
Termination power to SCSI
bus
No
Figure 9–9
Jumper Settings for Connor 1.0-Gbyte Drive
Table 9–4 describes the 1.0-gigabyte Connor drive’s factory jumper settings.
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87
TABLE 9–4
1.0-Gbyte Conner Drive Configuration Jumpers
Pin Pair
Description
Factory Set
E1
SCSI ID address
Yes
E2
SCSI ID address
Yes
E3
SCSI ID address
No
E4
(Reserved)
No
E5
Motor enable
Yes
E6
Delay spin
No
E7
Disable parity
No
E8
SCSI bus power termination
No
Installing a Hard Disk Drive
To install a hard disk:
1. Refer to Figure 9–10.
2. Determine which type of disk drive mounting bracket you have.
a. If the disk drive bracket does not have grommets, continue with Step 3.
b. If the disk drive bracket has grommets, skip Step 3 and move on to Step 4.
3. For a drive bracket without grommets, partially insert the standard mounting
screws into the drive screw holes.
Use the holes that are closest to the corners of the drive. Now skip ahead to Step 5.
4. If the drive bracket has grommets, insert a shoulder screw into each grommet,
leaving enough clearance for the drive to be lowered into the bracket.
5. Lower the hard drive into the bracket and tighten the four screws.
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Note - The drive may not sit perfectly flat until it is completely fastened.
Figure 9–10
Installing a Hard Disk Drive
6. Attach the hard drive data cable to the data cable connector on the disk drive.
The location of the data connector on the disk drive is shown in Figure 9–10. The
data cable connector is keyed to fit only one way.
Storage Devices
89
Caution - Carefully align the connector pins with the socket to avoid damaging the
pins. Do not force the connection.
7. Locate the disk drive power cable coming from the power supply and connect
it to the disk drive.
The disk drive power cable has a small 4-pin connector. The power connector on
the hard drive is located next to the data connector, and is shown in Figure 9–1.
Make the connection so that the beveled edge of the connector is facing down.
8. Attach the disk drive data cable to the disk drive data connector on the main
logic board.
See Figure 9–11 for the connector’s location. The connector is keyed to fit only
one way.
Figure 9–11
Main Logic Board
This completes the procedure for installing the disk drive.
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Disk Drive Bracket
The disk drive bracket resides in the top part of the system unit in front of the power
supply (see Figure 9–13). It houses both the diskette drive and the hard disk drive.
The hard drive may be removed independently of the disk drive mounting bracket,
but you must remove the disk drive bracket before removing the diskette drive or
power supply. Refer to Figure 9–12 through Figure 9–15 for the location of the disk
drive mounting bracket and the captive screw that secures it to the system.
Removing the Disk Drive Mounting Bracket
To remove the disk drive mounting bracket:
1. Prepare to work on the system as described in Chapter 6,” and in Chapter 7.
Halt the system and verify that the power LED is not lit and the fan is not
running. Then open the system unit and attach a wrist strap as described in
“Attaching the Wrist Strap” on page 53.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
2. Place an antistatic mat, shiny side up, next to the system unit.
3. Disconnect cables.
Storage Devices
91
a. Free the power and diskette drive data cables (if present) from the cable
management guides located above the diskette drive (see Figure 9–12).
b. Disconnect the power cable attached to the hard disk drive (see Figure 9–12).
c. Disconnect the main logic power cable and the keyboard soft power-on
cable from the main logic board (see Figure 9–12).
d. Disconnect the diskette drive data cable (if present) and the hard disk data
cable from their connectors on the main logic board (see Figure 9–12).
Note - When pulling up the data cable’s pull tab, brace the main logic board
near the socket to minimize board flex.
Figure 9–12
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Open View of System Unit
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
4. Loosen the captive Phillips-head screw that secures the disk drive mounting
bracket to the system chassis.
See Figure 9–13 and Figure 9–14 for the screw’s location.
Lift up the bracket as you loosen the screw until the bracket disengages from the
unit top.
Figure 9–13
Removing the Disk Drive Mounting Bracket
5. Remove the disk drive mounting bracket.
a. Carefully bend the power cables where they exit the power supply so that
the mounting bracket can be removed without snagging or cutting the
cables.
b. Tilt the bracket up and away from the power supply (see Figure 9–13).
c. Lift the bracket out of the system unit and place it on an antistatic mat.
Storage Devices
93
Figure 9–14
Detail of Disk Drive Mounting Bracket
Replacing the Disk Drive Mounting Bracket
To replace the disk drive mounting bracket:
1. Preparation.
Before setting the disk drive bracket flat in the unit top, connect the power cable
to the diskette drive (if present) and the data cable to the hard drive (see Figure
9–15 and Figure 9–16).
2. Install the bracket.
Tilt the disk drive bracket toward the front of the unit. Gently lower the bracket
into position in front of the power supply (see Figure 9–15).
Note - The disk drive bracket must engage a securing ridge at the inside front of
the unit top. If the bracket is installed incorrectly, you will not be able to insert
diskettes into the diskette drive.
3. Tighten the captive screw.
Tighten the captive Phillips-head screw at the center rear of the bracket to secure
it to the chassis. Be careful not to overtighten the screw or damage may result.
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Figure 9–15
Replacing the Disk Drive Mounting Bracket
4. Reconnect the cables (see Figure 9–15).
Each connector is keyed to fit only one way. For connector locations on the main
logic board, see Chapter 11.
a. Connect the power cable to the hard disk drive.
b. Secure the diskette drive data cable (if present) and the power supply
wiring harness in the cable management guides above the diskette drive
(see Figure 9–12).
c. Connect the hard disk data cable and the diskette drive data cable (if
present) to their respective connectors on the main logic board (see Figure
9–15).
d. Connect the internal power cable and the keyboard soft power-on cable to
their respective connectors on the main logic board.
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95
5. Refer to Chapter 7 to perform the following procedures:
4 Detaching the wrist strap
4 Closing the system unit
4 Reconnecting system components
6. Refer to Chapter 6 to turn the power on.
Diskette Drive
The diskette drive is in the unit top at the front right side (see Figure 9–12). A 34-pin
data cable and a 4-pin power cable connect to the rear of the drive. Four Phillips-head
screws attach the diskette drive to the mounting bracket. The drive and the mounting
bracket (described previously) are secured to the chassis by a single captive
Phillips-head screw at the center rear of the bracket. See Figure 9–14 and Figure 9–16.
Caution - The hard disk drive and diskette drive contain electronic components that
are extremely sensitive to static electricity. Ordinary amounts of static from your
clothes or work environment can destroy the components. Do not touch the
components themselves or any metal parts. Always wear a grounding strap when
handling these drives. Attach the strap to your wrist and to the metal casing of the
power supply.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
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Removing the Diskette Drive
To remove the diskette drive:
1. Preparation.
Follow the instructions for removing the disk drive mounting bracket in
“Removing the Disk Drive Mounting Bracket” on page 91.
2. Remove the four Phillips-head screws holding the diskette drive to the disk
drive mounting bracket (see Figure 9–16).
3. Remove the diskette drive from the bracket.
Slide the diskette drive out of the bracket as shown in Figure 9–16 and place it on
an antistatic mat.
Figure 9–16
Disk Drive Mounting Bracket
4. Detach the diskette drive data cable.
Storage Devices
97
Detach the data cable from the diskette drive and set it aside for use with the
replacement drive.
This completes the diskette drive removal process.
Replacing the Diskette Drive
To replace the diskette drive:
1. Remove the defective diskette drive as instructed in the preceding section.
2. On the replacement drive, verify the proper setting of the drive select switch.
Make sure the switch position matches that of the defective drive. See Figure 9–16
for the switch location.
3. Connect the data cable to the replacement drive (see Figure 9–16).
Use the end of the cable that has no pull tab. The connector is keyed so it will fit
only one way.
4. Install the diskette drive (see Figure 9–16).
a. Slide the diskette drive and attached cable into the cavity in the disk drive
mounting bracket. Make sure the drive’s printed circuit board is facing up.
b. Thread the data cable through the opening on top of the drive mounting
bracket.
c. Align the four screw holes in the mounting bracket with the holes in the
diskette drive, insert the screws, and fasten the diskette drive securely in
the bracket.
5. Replace the disk drive mounting bracket in the unit top.
See “Replacing the Disk Drive Mounting Bracket” on page 94”.
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CHAPTER
10
System Board Overview
This chapter describes how to prepare for replacing the system board and its
components and assemblies when you are replacing parts. Each SPARCclassic/
SPARCclassic X/SPARCstation LX system board is illustrated and their customer
replaceable units (CRUs) identified.
4 “Before You Begin” on page 99
4 “Damage Prevention” on page 100
4 “Handling System Boards and Assemblies” on page 100
4 “Main Logic Board Layouts” on page 102
4 “Identifying Replaceable System Board Components” on page 104
Before You Begin
Before you begin to replace CRUs, make sure you do the following:
4 Halt your system
4 Gather the proper tools
4 Disconnect external peripherals (if any)
4 Open the system unit
4 Attach a wrist strap
Instructions for the procedures listed above are described in Chapter 6, and in
Chapter 7.
99
Damage Prevention
Caution - Use an antistatic mat (the part number is listed in Chapter 12) when
working with the system board. An antistatic mat contains the amount of cushioning
needed to protect the underside components, to prevent board flexing, and to
provide antistatic protection.
Handling System Boards and
Assemblies
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Caution - Printed circuit boards are made of delicate electronic components that are
extremely sensitive to static electricity. Ordinary amounts of static from your clothes
or work environment can destroy the boards. Handle boards only by the
non-conducting edges. Do not touch the components themselves or any metal parts.
Always wear a grounding (wrist) strap when handling the boards. Attach the wrist
strap to the metal casing of the power supply at the rear of the unit top.
Caution - Hot surface. Avoid contact. Surfaces are hot and may cause personal
injury if touched.
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Caution - The system board and related modules and cards have surface-mount
components which may break when the board is flexed.
To minimize the amount of board flexing, observe the following precautions:
4 Hold the system board only by the edges.
4 Do not place the system board on a hard surface. Use a cushioned antistatic mat.
See Chapter 12, for the part number.
4 Transport the board in an antistatic bag.
Protect yourself and the equipment by observing the safety precautions described in
Table 10–1.
TABLE 10–1
Safety Precautions
Item
Problem
Precaution
AC power cord
ESD
(Electrostatic
discharge)
Make sure that the power cord connects the system to
a grounded electrical outlet. The power cord provides
a ground path for the system unit.
Electric shock
Make sure that the system power switch is in the
standby position before opening the system for service.
Wrist strap
ESD
Wear a wrist strap when handling printed circuit
boards.
ESD mat
ESD
Use the antistatic mat (see Chapter 12) when working
on a printed circuit board. In addition to providing
ESD protection, the mat also cushions the board to
prevent breakage of parts mounted on the bottom of
the board.
Printed circuit
boards
ESD
Handle a printed circuit board by the edges only.
Store a board in an antistatic bag.
Cover
System damage
and overheating
Replace the cover to keep out foreign objects and to
prevent overheating.
Filler panels
System damage
and overheating
Install filler panels in all unused SBus board slots.
Open slots severely reduce the correct airflow in the
system and can lead to equipment damage.
The following items are customer replaceable units.
System Board Overview
101
Main Logic Board Layouts
The main logic board (MLB) resides in the bottom half of each system unit (see
Figure 10–4). Figure 10–1 shows a simplified layout of the SPARCclassic and the
SPARCclassic X terminal main logic board. Table 10–2 lists acronyms and
abbreviations for certain components.
Figure 10–1
Main Logic Board Layout—SPARCclassic/SPARCclassic X Systems
Figure 10–2 and Figure 10–3 illustrate the SPARCstation LX main logic boards.
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Figure 10–2
Main Logic Board Layout—SPARCstation LX System (Part 270-2233)
System Board Overview
103
Figure 10–3
Main Logic Board Layout—SPARCstation LX System (Part 270-2474)
Identifying Replaceable System Board
Components
Before you attempt to replace or install a new SPARCclassic/SPARCclassic X/
SPARCstation LX board or subassembly, make sure that you have the right unit.
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Visually identify each CRU by looking at the appropriate system board layout
illustration from Figure 10–1, Figure 10–2, or Figure 10–3, and by looking at the unit
bottom illustration in Figure 10–4. Table 10–2 lists acronyms and abbreviations for
certain components of the MLB.
TABLE 10–2
Acronyms for Components of the Main Logic Board
Acronym/Abbreviation
Full Expression
NVRAM
Nonvolatile Random Access Memory
PROM
Programmable Read-Only Memory
PTC
Positive Temperature Coefficient
DRAM
Dynamic Random Access Memory
DSIMM
Dynamic Single In-line Memory Module
VSIMM
Video Single In-line Memory Module
AUI
Attachment Unit Interface (Ethernet adapter cable)
LED
Light-Emitting Diode
ISDN
Integrated Services Digital Network
The SPARCclassic/SPARCclassic X/SPARCstation LX system board CRUs are listed
below.
Unit bottom
4 DSIMMs
4 VSIMM
4 SBus cards
4 Speaker/power LED assembly
4 Main logic board
4 NVRAM
4 System I/O board
Internal cables
4 Diskette drive data cable (Not applicable to SPARCclassic X terminal)
4 Hard disk drive data cable (Not applicable to SPARCclassic X terminal)
System Board Overview
105
Note - As noted in the part labels shown in Figure 10–4, some items are not
applicable to the SPARCclassic X terminal.
Figure 10–4
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View of Open System Unit
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
CHAPTER
11
Main Logic Board and Component
Replacement
This chapter describes procedures for removing and replacing the main logic board
and its components. In addition, the default SPARCstation LX ISDN jumper settings
are also described.
4 “SBus Cards” on page 107
4 “Video SIMM (VSIMM)” on page 113
4 “DRAM Single In-line Memory Modules (DSIMMs)” on page 117
4 “Main Logic Board” on page 124
4 “Nonvolatile RAM (NVRAM)” on page 138
4 “SPARCstation LX ISDN Jumper Settings” on page 140
SBus Cards
This section describes the procedures for removing and replacing a faulty SBus card.
If you are adding a new SBus card, and not replacing one, refer instead to the Desktop
SPARC Hardware Owner’s Guide and the documentation supplied with the new card.
Removing SBus Cards
To remove an SBus card from the system unit:
1. Prepare to work on the system as described in Chapter 6, and in Chapter 7.
107
Halt the system and verify that the power LED is not lit and the fan is not
running. Then open the system unit and attach a wrist strap as described in
“Attaching the Wrist Strap” on page 53.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
2. Place the antistatic mat, shiny side up, next to the system unit.
The mat is supplied with the replacement SBus card.
3. Detach any external cables connected to the faulty SBus card (if applicable).
4. Detach any internal cables leading from the SBus card to the main logic board
(if applicable).
Detach the cables from their connectors on the main logic board.
5. Remove the faulty SBus card.
Place your index fingers or thumbs beneath the corners of the SBus card where it
plugs into its slot. Lift up the card to release it from the slot (see Figure 11–1).
Caution - The plastic SBus card retainer is not a handle. Pulling on the SBus card
retainer can cause it to break.
6. Place the SBus card on an antistatic mat.
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Figure 11–1
Removing the SBus Card
7. Replace the SBus slot filler panel (if necessary).
If you will not be installing a replacement SBus card, install the filler panel before
closing the system unit (Figure 11–2). Failure to do so can cause cooling problems
inside the system unit.
Main Logic Board and Component Replacement
109
Figure 11–2
SBus Slot Filler Panels
Replacing SBus Cards
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
To install a replacement SBus card in the system unit:
1. Remove the faulty SBus card.
See “Removing SBus Cards” on page 107. Make sure you use the wrist strap and
antistatic mat. Be sure to remember which slot contained the faulty SBus card.
2. Read the manual supplied with the replacement SBus card.
Pay particular attention to the section describing the jumper or switch settings,
slot requirements, and tools needed.
3. Remove the replacement card from its antistatic bag. Hold the card by the
edges.
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Place the SBus card on an antistatic surface (either an antistatic mat or the
antistatic bag in which the card was shipped).
4. If required, set the jumpers or switches on the card.
Refer to the manual supplied with the replacement SBus card.
5. Align the mounting plate of the new SBus card with the rectangular opening in
the system unit’s back panel (see Figure 11–3 and Figure 11–4).
Position the card in the same location that the faulty card occupied. Insert the two
locating tabs on the card’s mounting plate into the slots above the rectangular
opening in the back panel.
Figure 11–3
Positioning the SBus Card
6. Connect the SBus card to its slot.
Align the connector on the card with the SBus slot on the main logic board. Press
gently on the corners of the SBus card until the connection is secure (see Figure
11–4). Do not force the card.
Caution - Do not press down on the SBus card retainer, as this can cause it to break.
Using excessive force to secure the connection may bend or damage the connector
pins.
7. Refer to the manual supplied with the replacement card for instructions on any
additional hardware setup.
Main Logic Board and Component Replacement
111
8. Attach any internal cables leading from the SBus card to the main logic board
(if applicable).
9. Attach any external cables that must be connected to the SBus card (if
applicable).
Figure 11–4
Connecting the SBus Card
10. Refer to Chapter 7 to perform the following procedures:
4 Detaching the wrist strap
4 Closing the system unit
4 Reconnecting system components
11. Refer to Chapter 6 to turn the power on.
12. Refer to the guide for your SBus product to complete any required software
installation, configuration, or additional setup procedures.
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Video SIMM (VSIMM)
This section describes the procedures for removing and replacing a faulty Video
SIMM. The VSIMM is an option on SPARCstation LX systems only. Complete
installation procedures can be found in Installing SPARCclassic/SPARCclassic X/
SPARCstation LX DSIMMs and VSIMMs.
Removing the VSIMM
Caution - Printed circuit boards are made of delicate electronic components that are
extremely sensitive to static electricity. Ordinary amounts of static from your clothes
or work environment can destroy the boards. Handle boards only by the
nonconducting edges. Do not touch the components themselves or any metal parts.
Always wear a grounding (wrist) strap when handling the boards. Attach the wrist
strap to the metal casing of the power supply at the rear of the unit top.
To remove the VSIMM from the system unit:
1. Prepare to work on the system as described in Chapter 6, and in Chapter 7.
Halt the system and verify that the power LED is not lit and the fan is not
running. Then open the system unit and attach a wrist strap as described in
“Attaching the Wrist Strap” on page 53.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Main Logic Board and Component Replacement
113
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
2. Locate the VSIMM slot on the main logic board.
See Figure 11–5.
Figure 11–5
VSIMM Slot Location
3. Place an antistatic mat, shiny side up, next to the system unit.
The mat is supplied with the replacement VSIMM.
4. Remove the faulty VSIMM.
Grasp the VSIMM at its top corners and carefully wiggle it free from its connector
(see Figure 11–6). Be careful not to touch any of the components on the VSIMM.
5. Place the VSIMM on the antistatic mat.
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Figure 11–6
Removing the VSIMM
Replacing the VSIMM
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
Caution - The SIMMs installed in your system must be specifically designed to
operate in it. Do not transfer a SIMM from a different Sun system unless you are sure
it is compatible with your system.
Main Logic Board and Component Replacement
115
To replace the VSIMM on the main logic board:
1. Remove the faulty VSIMM.
See “Removing the VSIMM” on page 113. Make sure you use the wrist strap and
antistatic mat.
2. Install the new VSIMM.
The VSIMM is keyed so it can be installed only in one way. Grasp the VSIMM by
its top corners and align it with its connector (see Figure 11–7). Applying equal
pressure to both corners, push down the VSIMM until it is firmly seated in its
connector.
3. Refer to Chapter 7 to perform the following procedures:
4 Detaching the wrist strap
4 Closing the system unit
4 Reconnecting system components
4. Refer to Chapter 6 to turn the power on.
Figure 11–7
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Installing the VSIMM
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
DRAM Single In-line Memory Modules
(DSIMMs)
This section describes the procedures for removing and replacing faulty DSIMMs. To
determine the location of a faulty DSIMM, see “Determining Faulty DSIMM
Locations” on page 37.
DSIMM Configurations
The main logic board contains six DSIMM slots capable of accepting either 1-, 2-, 4-,
or 16-megabyte DSIMMs. The six DSIMM slots are logically grouped into three
memory banks, with two DSIMM slots to a bank. Each slot is labeled 1, 2, or 3 to
indicate its corresponding memory bank.
You can combine different types of DSIMMs in the same system, but you must
observe the following restriction: The two DSIMM slots within each bank must be
identically configured (that is, they should both contain the same type of DSIMM or
else both should be empty).
Figure 11–8 shows a typical DSIMM. If you are merely expanding memory, and not
repairing it, refer instead to the document supplied with your memory upgrade,
Installing SPARCclassic/SPARCclassic X/SPARCstation LX SIMMs.
Figure 11–8
Typical DSIMM
Figure 11–9 shows the DSIMM slot locations on the main logic board. Table 11–1
shows the configuration matrix for the SPARCclassic X terminal using 1-,2-,4-, and
16-megabyte memory modules. Table 11–2 shows the configuration matrix using 4and 16-megabyte memory modules. The maximum memory configuration is
96 megabytes using six 16-megabyte DSIMMs.
Main Logic Board and Component Replacement
117
Figure 11–9
TABLE 11–1
118
DSIMM Slot Locations
Memory Configuration Matrix—SPARCclassic X Terminal
Total
Slot
Slot
Slot
Slot
Slot
Slot
Memory
U0304
U0301
U0402
U0303
U0302
U0401
8 MB
1 MB
1 MB
2 MB
1 MB
1 MB
2 MB
8 MB
2 MB
2 MB
—
2 MB
2 MB
—
8 MB
4 MB
—
—
4 MB
—
—
12 MB
1 MB
1 MB
4 MB
1 MB
1 MB
4 MB
12 MB
2 MB
4 MB
—
2 MB
4 MB
—
12 MB
2 MB
2 MB
2 MB
2 MB
2 MB
2 MB
16 MB
2 MB
2 MB
4 MB
2 MB
2 MB
4 MB
16 MB
4 MB
4 MB
—
4 MB
4 MB
—
20 MB
2 MB
4 MB
4 MB
2 MB
4 MB
4 MB
24 MB
4 MB
4 MB
4 MB
4 MB
4 MB
4 MB
32 MB
16 MB
—
—
16 MB
—
—
36 MB
1 MB
1 MB
16 MB
1 MB
1 MB
16 MB
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE 11–1
Memory Configuration Matrix—SPARCclassic X Terminal
(continued)
Total
Slot
Slot
Slot
Slot
Slot
Slot
36 MB
2 MB
16 MB
—
2 MB
16 MB
—
40 MB
2 MB
2 MB
16 MB
2 MB
2 MB
16 MB
40 MB
4 MB
16 MB
—
4 MB
16 MB
—
44 MB
2 MB
4 MB
16 MB
2 MB
4 MB
16 MB
48 MB
4 MB
4 MB
16 MB
4 MB
4 MB
16 MB
64 MB
16 MB
16 MB
—
16 MB
16 MB
—
68 MB
2 MB
16 MB
16 MB
2 MB
16 MB
16 MB
72 MB
4 MB
16 MB
16 MB
4 MB
16 MB
16 MB
96 MB
16 MB
16 MB
16 MB
16 MB
16 MB
16 MB
TABLE 11–2
Configuration Matrix for Memory Modules
Total
Slot
Slot
Slot
Slot
Slot
Slot
Memory
U0304
U0301
U0402
U0303
U0302
U0401
16 MB
4 MB
4 MB
—
4 MB
4 MB
—
24 MB
4 MB
4 MB
4 MB
4 MB
4 MB
4 MB
32 MB
16 MB
—
—
16 MB
—
—
40 MB
4 MB
16 MB
—
4 MB
16 MB
—
48 MB
4 MB
4 MB
16 MB
4 MB
4 MB
16 MB
64 MB
16 MB
16 MB
—
16 MB
16 MB
—
72 MB
4 MB
16 MB
16 MB
4 MB
16 MB
16 MB
96 MB
16 MB
16 MB
16 MB
16 MB
16 MB
16 MB
Main Logic Board and Component Replacement
119
Removing a DSIMM
The procedure for removing a DSIMM is the same regardless of the type of DSIMM.
Caution - Printed circuit boards are made of delicate electronic components that are
extremely sensitive to static electricity. Ordinary amounts of static from your clothes
or work environment can destroy the boards. Handle boards only by the edges. Do
not touch the components themselves or any metal parts. Always wear a grounding
(wrist) strap when handling the boards. Attach the wrist strap to the metal casing of
the power supply at the rear of the unit top.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
To remove a DSIMM:
1. Prepare to work on the system as described in Chapter 6, and in Chapter 7
Halt the system and verify that the power LED is not lit and the fan is not
running. Then open the system unit and attach a wrist strap as described in
“Attaching the Wrist Strap” on page 53. Be sure to leave the system unit plugged
in to an AC wall outlet to provide a proper ground path.
2. Locate the DSIMM slots on the main logic board.
See Figure 11–9.
3. Place an antistatic mat, shiny side up, next to the system unit.
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The mat is supplied with the replacement DSIMMs.
4. Locate and remove the faulty DSIMM.
See “Determining Faulty DSIMM Locations” on page 37.
The DSIMMs are held in their slots by metal clips. To release the modules, pry
apart the clips with your fingernails while pushing the top of the module gently
forward about 30 degrees from the vertical position (see Figure 11–6). Then pull
the DSIMM out of its socket.
Any DSIMMs you remove should be placed on the antistatic mat.
Note - The DSIMMs are closely spaced. In order to remove a DSIMM, you may
need to remove adjacent DSIMMs first. Keep track of which DSIMMs are installed
in which slots. If you are removing a defective DSIMM, take care not to get it
mixed up with the other DSIMMs.
Main Logic Board and Component Replacement
121
Figure 11–10
Removing a DSIMM
Replacing a DSIMM
The procedure for replacing a DSIMM is the same regardless of the type of SIMM.
Caution - The SIMMs installed in your system must be specifically designed to
operate in it. Do not transfer a SIMM from a different Sun system unless you are sure
it is compatible with your system.
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Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
To replace a DSIMM:
1. Identify and remove the faulty DSIMM.
See “Removing a DSIMM” on page 120. Make sure you use the wrist strap and
antistatic mat. For any DSIMM you remove, be sure to note its original slot.
2. Remove the replacement DSIMM from its protective packaging, and place it on
the antistatic mat.
3. Determine where to install the new DSIMM and any others you may have
removed.
The replacement DSIMM should go where the faulty DSIMM was located. Any
other DSIMMs you removed should go in the slots where they were originally
installed.
Note - The six DSIMM slots are logically grouped into pairs—labeled 1, 2, and 3.
When installing DSIMMs, you must make sure that each pair of DSIMM slots is
identically configured. For more information, see the discussion of paired
DSIMMs in “DRAM Single In-line Memory Modules (DSIMMs)” on page 117.
4. Install the DSIMMs.
Since the DSIMMs are closely spaced, they must be installed in the proper order.
Start with the slot closest to the center of the main logic board and work outward
toward the board’s front edge.
Hold each DSIMM at its edges and insert it into the plastic guides at an angle
about 30 degrees from the vertical position (see Figure 11–11). Then, by pushing
gently on its top edge, rotate the DSIMM into an upright position. You should
hear it click into place.
Note - Each DSIMM is keyed so it can only be installed in one way.
Main Logic Board and Component Replacement
123
Figure 11–11
Installing a DSIMM
5. Refer to Chapter 7 to perform the following procedures:
4 Detaching the wrist strap
4 Closing the system unit
4 Reconnecting system components
6. Refer to Chapter 6 to turn the power on.
Caution - When you are finished installing parts inside the system unit, be sure to
close the system unit before turning on the power. It is not safe to operate the system
unit while it is open. See “Closing the System Unit” on page 55 for instructions.
Main Logic Board
This section explains how to remove and replace the main logic board (MLB).
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Main Logic Board Voltage Test Points
There are no voltage test points on the main logic board. If you need to measure
voltages, the safest place is at the power supply connection on the main logic board
(see Figure 11–12 and Figure 11–13). See “Before Replacing the Main Logic Board” on
page 128 for the connector wiring and voltages.
Caution - Printed circuit boards are made of delicate electronic components that are
extremely sensitive to static electricity. Ordinary amounts of static from your clothes
or work environment can destroy the boards. Handle boards only by the
nonconducting edges. Do not touch the components themselves or any metal parts.
Always wear a grounding (wrist) strap when handling the boards. Attach the wrist
strap to the metal casing of the power supply at the rear of the unit top.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
Main Logic Board and Component Replacement
125
Figure 11–12
126
Main Logic Board Layout—SPARCclassic/SPARCclassic X
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 11–13
Main Logic Board Layout—SPARCstation LX (Part 270-2233)
Main Logic Board and Component Replacement
127
Figure 11–14
Main Logic Board Layout—SPARCstation LX (Part 270-2474)
Before Replacing the Main Logic Board
This section explains what steps to perform before removing and replacing the main
logic board.
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Note - Removing and replacing the main logic board is a drastic step to take.
Therefore, it is important to try to troubleshoot all other possibilities before removing
and replacing the main logic board.
To check for and eliminate other possible problems before you replace the main logic
board, do the following:
1. Preparation.
a. Follow the instructions in Chapter 6, and in Chapter 7, about halting your
system, opening the system unit, and attaching a wrist strap. The wrist strap
should be attached to the metal casing of the power supply inside the
system unit.
b. Make sure that the system unit’s power is in the Standby position by
verifying that the green LED at the front of the chassis is not lit and that the
fan in the power supply is not running. The AC power cord should remain
attached to the system unit and AC wall outlet. Inside the system unit, the
power supply wiring harness should remain connected to the main logic board
to complete the ground.
c. Attach a terminal to serial port A on the system unit. For details, see the
Desktop SPARC Hardware Owner’s Guide. A terminal enables you to view
the output of the POST results as they are run. Alternatively, you can set up
a tip connection to another workstation; see “Setting Up a tip Connection
to Another Workstation” on page 24, for details.
d. Disconnect the video monitor, the keyboard, and the Ethernet cable from
the system unit.
e. Remove any SBus cards from the system. See “SBus Cards” on page 107 for
removal/replacement procedures.
f. Disconnect the hard disk drive and the diskette drive from their power and
data cables. See Figure 9–12 and Figure 9–13 for cable locations.
2. Verify the connections of internal parts.
a. Make sure that all SIMMs are correctly seated, the power supply harness is
connected to the main logic board, and all replaceable chips on the board
are correctly seated in their sockets. (See Figure 11–12 and Figure 11–13 for
SIMM locations.)
b. Follow the directions in Chapter 6, for turning on the power.
Main Logic Board and Component Replacement
129
c. Using a Volt-Ohmmeter (VOM), measure the power supply voltages at the
12-pin power connector on the main logic board.
Caution - Voltage measurements will be inaccurate if the power supply wiring
harness is not connected to the main logic board. Without load, the power supply
will not regulate.
The colored wires of the power harness supply the following signals and
voltages:
4 Red: +5V
4 Blue: +12V
4 Brown: -12V
4 Gray: POR (Power on reset)
4 Black: Ground
Note - The POR signal is a Transistor-Transistor Logic (TTL) open collector
and pull up is on the main logic board.
The limits for the voltages are:
4 +5V: 4.90 to 5.10
4 +12V: 11.16 to 12.84
4 -12V: -11.6 to -13.2 with a hard drive
4 -12V: -10.2 to -13.8 without a hard drive
If the voltages are correct, you can rule out a defective power supply.
1. Reconnect the cables and SBus cards one at a time and measure the voltages
each time. In this way, you can determine whether one of the system
components is holding down a power supply voltage.
2. Close the system unit using the procedure in “Closing the System Unit” on
page 55.
3. Enter the Forth Toolkit.
a. Turn on the system and the terminal. The system will start to boot.
b. Interrupt the boot sequence by pressing the Break key on the terminal
keyboard.
c. If you see the ok prompt, go to step 3-e. If you see the > prompt, continue
with step 3-d.
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d. At the > prompt, type n and press Return. When the ok prompt appears,
you have entered the Forth Toolkit.
e. Use the commands shown below to set the diagnostic switch to True, set the
autoboot switch to False, and reset the system.
ok setenv diag-switch? true
ok setenv auto-boot? false
ok reset
As the POSTs run, view the results on the terminal screen.
f. If all POSTs pass, go to step 5. Otherwise, proceed as follows:
i. If the Limited Main Memory Address Test fails, the “U” number of the
faulty DSIMM is displayed on the terminal. Replace the defective
DSIMM using “DRAM Single In-line Memory Modules (DSIMMs)” on
page 117.
ii. If any other POST fails, or the system appears dead, replace the main
logic board. The appropriate removal/replacement procedures in “SBus
Cards” on page 107.
a. If you replaced the main logic board or a DSIMM, return to step 3 of this
procedure.
4. If you still have not identified the problem, go to the next step. Otherwise, skip
ahead to step 7.
5. Run the SunDiagnostic Executive with the cache disabled.
The SunDiagnostic Executive is an independent operating system. It runs
exhaustive subsystem tests independent of your system’s normal operating
system. See the SunDiagnostic Executive User’s Guide for Desktop SPARCstations.
6. At the > or ok prompt, turn off the system’s power switch.
7. Disconnect the terminal and reconnect the graphics monitor, keyboard, and
Ethernet connector.
See the Desktop SPARC Hardware Owner’s Guide or Using a SPARCclassic X
Terminal for installation instructions.
Main Logic Board and Component Replacement
131
Removing the Main Logic Board
This section explains how to remove a faulty main logic board from the system unit.
Note - Removing and replacing the main logic board is a drastic step to take. See
“Before Replacing the Main Logic Board” on page 128 for troubleshooting
information.
To remove the main logic board:
1. Prepare to work on the system as described in Chapter 6, and in Chapter 7.
Halt the system and verify that the power LED is not lit and that the fan is not
running. Then open the system unit, detach all peripherals, and attach a wrist
strap as described in “Attaching the Wrist Strap” on page 53.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
2. Place an antistatic mat, shiny side down, next to the system unit.
3. Remove any SBus cards.
See “SBus Cards” on page 107 for removal procedures.
4. Remove all DSIMMs from the main logic board.
Note carefully the slot where each DSIMM resides so it may be installed in the
same slot on the replacement main logic board. See “Removing a DSIMM” on
page 120, for removal procedures.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
5. Remove the optional VSIMM (if present).
See “Removing the VSIMM” on page 113, for removal procedures.
6. Disconnect all cables attached to the main logic board.
For connector locations, refer to Figure 11–12 and Figure 11–13 in “Main Logic
Board” on page 124.
a. Disconnect the 12-pin power supply cable from its mating connector by
squeezing the clip at the end of the cable and pulling straight up.
b. Disconnect the keyboard soft power-on cable from its connector next to the
12-pin power supply connector.
c. Disconnect the LED/speaker cable from its mating connector on the main
logic board.
d. Disconnect the diskette drive data cable (if present) and the hard disk drive
data cable from their connectors at the front of the main logic board.
7. Remove the NVRAM chip.
See “Nonvolatile RAM (NVRAM)” on page 138, for details. Place the NVRAM
chip on the antistatic mat. Save the chip for installation on the replacement main
logic board.
8. Remove the main logic board.
a. Pull the MLB (main logic board) extractor lever toward the front of the
system unit to disconnect the main logic board from the system I/O board
(see Figure 11–15).
b. Raise the speaker assembly to allow removal of the main logic board
(see Figure 11–16).
c. Grasp the board by the SBus connectors with both hands. Tilt the board
slightly to avoid the speaker assembly and lift it up and out of the system
unit (see Figure 11–17). Avoid handling any of the delicate electronic
components or touching any of the circuit board traces.
d. Place the main logic board on an antistatic mat.
Main Logic Board and Component Replacement
133
134
Figure 11–15
Extracting the Main Logic Board
Figure 11–16
Raising the Speaker/LED Assembly
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 11–17
Removing and Replacing the Main Logic Board
Main Logic Board and Component Replacement
135
Installing the New Main Logic Board
This section explains how to install a replacement main logic board in the system
unit.
To install the main logic board:
1. Remove the defective main logic board as described in the previous section.
2. Install the NVRAM on the replacement main logic board.
Take the NVRAM chip you removed from the old main logic board and install it
on the new main logic board. See “Nonvolatile RAM (NVRAM)” on page 138, for
details.
3. Install the DSIMMs.
Remove DSIMMs taken from the old main logic board and install them in the
corresponding DSIMM slots of the new logic board. See “Replacing a DSIMM” on
page 122, for installation details.
4. Install the optional VSIMM (if applicable).
See “Replacing the VSIMM” on page 115, for installation details.
5. Install the new main logic board.
a. Grasp the board by the SBus connectors with both hands and guide the
main logic board extractor lever through the rectangular cutout in the main
logic board (see Figure 11–17). Avoid handling any of the delicate electronic
components or touching any of the circuit board traces.
b. Tilt the board to avoid the speaker assembly and lower it onto the floor of
the system unit.
c. Align the board’s edge connector with its mating connector on the system I/
O board.
d. Push the main logic board extractor lever toward the rear of the system unit
to plug the main logic board into the system I/O board (see Figure 11–18).
e. Lower the speaker assembly back to its original position.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 11–18
Plugging in the Main Logic Board
6. Reconnect all cables that attach to the main logic board.
Each connector is keyed to fit one way only. For connector locations, see Figure
11–12 and Figure 11–13.
a. Connect the 12-pin connector from the power supply harness to its mating
connector on the main logic board.
b. Connect the 3-pin connector from the power supply harness to the keyboard
soft power-on connector on the main logic board.
c. Connect the LED/speaker cable to its mating connector on the main logic
board.
d. Connect the diskette drive and hard disk drive data cables to their
connectors at the front of the main logic board.
Main Logic Board and Component Replacement
137
7. Reinstall any SBus cards (if applicable).
See “Replacing SBus Cards” on page 110” for installation details.
8. Refer to Chapter 7 to perform the following procedures:
4 Detaching the wrist strap
4 Closing the system unit
4 Reconnecting system components
9. Refer to Chapter 6” to turn the power on.
Nonvolatile RAM (NVRAM)
This section describes the removal and replacement procedures for the NVRAM chip.
If you replace the main logic board, you must transfer the NVRAM chip from the
faulty board to the replacement board.
Caution - The NVRAM chip is a delicate electronic component that is extremely
sensitive to static electricity. Ordinary amounts of static from your clothes or work
environment can destroy the NVRAM. Always wear a grounding strap when
handling the NVRAM.
Removing the NVRAM
To remove the NVRAM:
1. Prepare to work on the system as described in Chapter 6, and in Chapter 7.
Halt the system and verify that the power LED is not lit and that the fan is not
running. Then open the system unit, detach all peripherals, and attach a wrist
strap as described in “Attaching the Wrist Strap” on page 53.
Caution - The AC power cord should remain attached between the system unit and
an AC wall outlet. This connection provides the ground path necessary to protect
internal system components from harmful static discharges. Inside the system unit,
be sure the power supply wiring harness is connected to the main logic board to
complete the ground.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Caution - Verify that the system power switch is in the Standby position. The green
LED at the front of the system unit should not be lit and the fan should not be
running. When the system power switch is in the Standby position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
2. Locate the NVRAM chip carrier on the main logic board.
See Figure 11–19.
3. Hold the NVRAM chip carrier on both ends, and lift the chip straight up.
Gently wiggle the carrier as necessary (see Figure 11–20).
4. Place it on the antistatic mat.
Figure 11–19
Locating the NVRAM
Main Logic Board and Component Replacement
139
Figure 11–20
Removing the NVRAM
Replacing the NVRAM
To install the NVRAM on the main logic board:
1. Hold the NVRAM chip on both sides of the carrier.
2. Carefully align the pins and insert the NVRAM chip into its socket.
The carrier is keyed so the NVRAM can be installed only one way.
3. Push down on the NVRAM chip until it is fully seated in its socket.
4. Refer to Chapter 7 to perform the following procedures:
4 Detaching the wrist strap
4 Closing the system unit
4 Reconnecting system components
5. Refer to Chapter 6 to turn the power on.
SPARCstation LX ISDN Jumper Settings
The SPARCstation LX is configured for ISDN support. Shown in Figure 11–21 are the
default jumper settings for the main logic board addresses J1801 and J1802,
respectively. Table 11–3 fully describes these jumper settings.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 11–21
Default SPARCstation LX ISDN Jumper Settings
The SPARCstation LX system board is delivered with the jumpers set for termination
on the system board. For more information about setting these jumpers, see the Sun
ISDN-BRI/SBI Hardware Configuration Guide.
TABLE 11–3
SPARCstation LX ISDN Jumper Settings
Address
Jumper Pins
Setting
Description
J1801
1, 2
Jumpered
ISDN termination is on the system
board (default).
2, 3
Jumpered
ISDN termination is assumed set at
the ISDN jack in the wall.
1, 2, 3
Not jumpered
ISDN termination is assumed set at
the ISDN jack in the wall.
1, 2
Jumpered
ISDN termination is on the system
board (default).
2, 3
Jumpered
ISDN termination is assumed set at
the ISDN jack in the wall.
1, 2, 3
Not jumpered
ISDN termination is assumed set at
the ISDN jack in the wall.
J1802
Main Logic Board and Component Replacement
141
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
CHAPTER
12
Illustrated Parts Breakdown
This chapter provides an illustrated parts breakdown (IPB) of the major parts that
comprise the SPARCclassic, SPARCclassic X, and SPARCstation LX systems, and a
list of customer replaceable units and their part numbers.
4 “Illustrations of Selected CRUs” on page 143
4 “Replacement Part List” on page 146
Note - Remember that diskette drive and hard drive parts do not apply to the
SPARCclassic X terminal.
Illustrations of Selected CRUs
Figure 12–1 through Figure 12–3 show exploded view illustrations of the
SPARCclassic/SPARCstation LX system unit.
143
Figure 12–1
144
Exploded View of the Unit Top
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Figure 12–2
Exploded View of the Unit Bottom
Illustrated Parts Breakdown 145
Figure 12–3
Exploded View of the Disk Drive Mounting Bracket
Replacement Part List
Table 12–1 provides the part numbers for customer replaceable units, Table 12–2
provides part numbers for miscellaneous items, and Table 12–3 part numbers for
related documentation.
Note - Although the part numbers are correct as of the publication date of this
document, they are subject to change. Consult your authorized Sun sales
representative or service provider to confirm part numbers before you order new or
replacement parts.
146
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE 12–1
Part Number List—Customer Replaceable Units
Description
Item
Sun Part No.
207-Mbyte Internal Disk Drive
1
370-1417
424-Mbyte Internal Disk Drive
2
370-1392
535-Mbyte Internal Disk
3
370-1424
1.0-Gbyte Internal Disk Drive
4
370-1546
Tri-density Floppy Drive
5
370-1419
70-Watt Power Supply
6
300-1101
System I/O Board
7
501-2269
Internal Speaker/Power LED Assembly
8
540-2233
Main Logic Board (0 Mbyte)—SPARCclassic
9
501-2262
Main Logic Board (0 Mbyte)—SPARCstation LX
10
501-2474
Main Logic Board (4 Mbyte)—SPARCclassic X
11
501-2079
Main Logic Board (8 Mbyte)—SPARCclassic X
12
501-2313
Upgrade (SPARCclassic X 4-Mbyte to Classic 16-Mbyte)
13
556-1774
Upgrade (SPARCclassic X 8-Mbyte to Classic 16-Mbyte)
14
556-1775
1-Mbyte DSIMM Module
15
501-2289
2-Mbyte DSIMM Module
16
501-2433
4-Mbyte DSIMM Module
17
501-1991
16-Mbyte DSIMM Module
18
501-2059
1-Mbyte VSIMM Module
19
501-2061
NVRAM/TOD
20
525-1203
NVRAM/TOD (SPARCclassic X)
21
525-1343
Diskette Drive Data Cable (Internal)
22
530-1643
Hard Drive Data Cable (Internal)
23
530-1678
Illustrated Parts Breakdown 147
TABLE 12–1
148
Part Number List—Customer Replaceable Units
(continued)
Description
Item
Sun Part No.
13W3 Video Cable
24
530-1870
SCSI II Cable
25
530-1793
AUI/Audio Adapter Cable
26
530-1856
AUI Adapter Cable
27
530-2021
Serial Interface Y-Cable
28
530-1869
SunMicrophone
29
370-1414
ISDN Cable (4.0 m)
30
530-1871
Twisted-Pair Ethernet Cable
31
530-1871
Keyboard Cable
32
530-1442
Type-4 Mouse/Type-4 Pad
33
365-1059
Type-5 Mouse/Type-5 Pad
34
370-1398
U.S. Type-5 Keyboard
35
320-1072
U.S. UNIX Type-5 Keyboard
36
320-1073
French Type-5 Keyboard
37
320-1074
Danish Type-5 Keyboard
38
320-1075
German Type-5 Keyboard
39
320-1076
Italian Type-5 Keyboard
40
320-1077
Holland/Dutch Type-5 Keyboard
41
320-1078
Norwegian Type-5 Keyboard
42
320-1079
Portuguese Type-5 Keyboard
43
320-1080
Spanish Type-5 Keyboard
44
320-1081
Swedish/French Type-5 Keyboard
45
320-1082
Swiss/French Type-5 Keyboard
46
320-1083
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE 12–1
Part Number List—Customer Replaceable Units
(continued)
Description
Item
Sun Part No.
Swiss/German Type-5 Keyboard
47
320-1084
U.K. Type-5 Keyboard
48
320-1085
Korean Type-5 Keyboard
49
320-1086
Taiwan Type-5 Keyboard
50
320-1087
Nihon-Go Type-5 Keyboard
51
320-1088
Finnish Type-5 Keyboard
52
320-1089
19" Grayscale Monitor
53
365-1154
15" SVGA Monitor
54
365-1286
16" Mid-range Color Monitor
55
365-1151
16" Premium Color Monitor
56
365-1159
19" Color Monitor
57
365-1167
Speaker Box
58
540-2220
TABLE 12–2
Part Number List—Miscellaneous Items
Description
Item
Wrist Strap
1
Sun Part No.
250-1007
Vertical Stand (side piece)
2
330-1455
Vertical Stand (base piece)
3
330-1458
Antistatic Mat with Sun Logo
4
5 Disposable Antistatic Mat
250-1088
330-1145
Illustrated Parts Breakdown 149
TABLE 12–2
Part Number List—Miscellaneous Items
(continued)
Description
Item
ISDN Enabling Kit
6
595-2459
Disk Drive Bracket Shoulder Screw
7
240-2145
TABLE 12–3
150
Sun Part No.
Part Number List—Related Hardware Documentation
Item
Description
Sun Part No.
1
Desktop Storage Pack Installation & Operation Manual
800-6316
2
Desktop Storage Module Installation & User’s Guide
800-7235
3
Desktop SPARC Hardware Owner’s Guide
801-2175
4
Desktop SPARC Hardware Product Notes
5
Sundiag User’s Guide
801-5319
6
Sundiag User’s Guide-Addendum for SMCC Hardware
801-5497
7
Open Boot Command Reference
800-6076
8
Open Boot Command Summary
800-5675
9
SPARCstation LX Hardware Setup Instructions
10
SPARCclassic Hardware Setup Instructions
801-2210
11
SPARCclassic X Terminal Hardware Setup Instructions
801-4250
12
SPARCclassic X Upgrade Guide
801-4721
801-2179
801-2177
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE 12–3
Part Number List—Related Hardware Documentation
(continued)
Item
Description
Sun Part No.
13
Installing SPARCclassic/SPARCclassic X/SPARCstation LX
SIMMs
801-2211
14
Sun ISDN-BRI/SBIH Hardware Configuration Guide
800-6863
Illustrated Parts Breakdown 151
152
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
APPENDIX
A
System Specifications
This appendix contains system specifications, including input power requirements,
environmental requirements, physical specifications, and regulatory compliance
information. All specifications are applicable to both SPARCclassic and SPARCstation
LX systems. Not all specifications will be applicable to the SPARCclassic X terminal,
which does not come equipped with a diskette drive or hard disk drive.
4 “Input Power Requirements” on page 153
4 “Environmental Requirements” on page 154
4 “Physical Specifications” on page 155
4 “Regulatory Compliance” on page 155
Input Power Requirements
Table A–1 lists the input power requirements for the system unit.
TABLE A–1
Input Power Requirements and Power Dissipation
Parameter
Specification
Nominal Frequencies
50 Hz or 60 Hz nominal
Nominal Voltage Range
100-120 Vac or 200-240 Vac
(100-240 Vac Auto)
Maximum Current AC RMS1 *
2 A @ 100-120 Vac, 1 A @ 200-240 Vac
153
TABLE A–1
Input Power Requirements and Power Dissipation
(continued)
Parameter
Specification
AC Operating Range
87-264 Vrms, 47-63 Hz
Maximum VA Rating
153.8 VA
Maximum Power Consumption
107.7 Watts
Maximum Heat Output
367.5 BTU/hr
1.
Maximum input current with accessory connected to accesory outlet is 6A
Environmental Requirements
Table A–2 lists the environmental requirements for both operating and non-operating
environments.
TABLE A–2
Environmental Requirements
Operating Environment:
Temperature
Humidity
10 to 40̊C (50 to 104̊F)
20 to 80% relative noncondensing
at 40̊C (104̊F)
Wet Bulb
25̊C (77̊F) maximum
Altitude
0 to 3048 m (0 to 10,000 ft)
Vibration
5-22 Hz, 0.01 inches p-p; 22-500 Hz, 0.25 g p-p
Shock
5 g pk, 10 msec 1/2 sine wave
Non-Operating Environment:
154
Temperature
20 to 75̊C (-4 to 167̊F)
Wet Bulb
46̊C (115̊F) maximum
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE A–2
Environmental Requirements
(continued)
Operating Environment:
Vibration
5-22 Hz, 0.02 inches p-p; 22-500 Hz, 0.5 g p-p
Shock
5 g pk, 10 msec 1/2 sine wave
Physical Specifications
Table A–3 lists the physical specifications for the system unit, keyboard, and optical
mouse.
TABLE A–3
Physical Specifications
Component
Height
Width
Depth
inches (mm)
inches (mm)
inches (mm)
Net Weight lbs
(kg)
System Unit
4.6 (118)
9.6 (245)
10.4 (264)
11.0 (4.95)
Keyboard, Type
5
1.7 (44)
20.1 (510)
7.2 (182)
3.5 (1.6)
Mouse
2.0 (50)
4.0 (100)
3.0 (80)
0.3 (0.14)
Regulatory Compliance
Table A–4 lists regulatory compliance information.
System Specifications 155
TABLE A–4
Regulatory Compliance Information
Product Safety
EMI
Ergonomics
UL 1950
FCC Class B
German Federal
CSA C22.2 No. 950
VDE Class B
Republic ZH 1/618
IEC 950 NEMKO CB
DOC Class B
ISO 9241
EN60950-TÜV
X-Ray Emissions
DHHS, PTB
VCCI Class 2
EN41003-TÜV
156
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
APPENDIX
B
System Connectors
This appendix contains pinouts and illustrations of the various system connectors.
The following connectors are described.
4 “Attachment Unit Interface (AUI) Connector” on page 158
4 “Twisted-Pair Ethernet Connector” on page 159
4 “ISDN Terminal Endpoint Connector” on page 159
4 “ISDN Network Termination Connector” on page 160
4 “Keyboard/Mouse Connector” on page 161
4 “SCSI Connector (External)” on page 161
4 “Serial Connector” on page 163
4 “Parallel Connector” on page 164
4 “13W3 Video Connector” on page 165
4 “Audio Ports and Audio Module” on page 166
4 “SCSI Connector (Internal)” on page 167
4 “Diskette Drive Connector (Internal)” on page 168
4 “SBus Connector (Internal)” on page 170
4 “Power Connector (Internal)” on page 171
157
Attachment Unit Interface (AUI)
Connector
Figure B–1
TABLE B–1
158
Attachment Unit Interface (AUI) Connector
Pinout for Attachment Unit Interface (AUI) Connector
Pin
Description
Pin
Description
1
AUI_DO_L
14
AUI_DO
2
AUI_DI
15
AUI_DI_L
3
AUI_CI_L
16
AUI_CI
4
ENET_PWR
17
GND
5
EMCTL
18
RESET_SENSE_L
6
CHIDX
19
CHIDR
7
CHI_CLK
20
CHIDFS
8
CODFS
21
CODCK
9
N/C
22
N/C
10
Vcc
23
GND
11
Vcc
24
GND
12
Codec_PWR_DN_L
25
MIDI_OUT
13
MIDI_IN
26
MIDI_IN_L
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Twisted-Pair Ethernet Connector
Figure B–2
TABLE B–2
Twisted-Pair Ethernet Connector
Pinout for Twisted-Pair Ethernet Connector
Pin
Description
Pin
Description
1
Transmit Data +
5
N/C
2
Transmit Data -
6
Receive Data -
3
Receive Data +
7
N/C
4
N/C
8
N/C
ISDN Terminal Endpoint Connector
Figure B–3
ISDN Terminal Endpoint Connector
System Connectors 159
TABLE B–3
Pinout for ISDN Terminal Endpoint Connector
Pin
Description
Pin
Description
1
PS1
5
Receive Data -
2
PS1-
6
Transmit Data -
3
Transmit Data +
7
PS2-
4
Receive Data +
8
PS2
ISDN Network Termination Connector
Figure B–4
TABLE B–4
ISDN Network Termination Connector
Pinout for ISDN Network Termination Connector
Pin
Description
Pin
Description
1
PS1
5
Transmit Data -
2
PS1-
6
Receive Data -
3
Receive Data +
7
PS2-
4
Transmit Data +
8
PS2
Note - The +5 Volt line is fuse-protected.
160
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Keyboard/Mouse Connector
Figure B–5
TABLE B–5
Keyboard/Mouse Connector
Pinout for Keyboard/Mouse Connector
Pin
Description
Pin
Description
1
Ground
5
Keyboard Out
2
Ground
6
Keyboard In
3
+5 Vdc
7
KBD_PWR_ON_L
4
Mouse In
8
+5 Vdc
Note - All signals are standard TTL levels. The +5V supply is fuse-protected.
SCSI Connector (External)
Figure B–6
External SCSI Connector
System Connectors 161
TABLE B–6
162
Pinout for External SCSI Connector
Pin
Description
Pin
Description
1
Ground
26
sd0*
2
Ground
27
sd1*
3
Ground
28
sd2*
4
Ground
29
sd3*
5
Ground
30
sd4*
6
Ground
31
sd5*
7
Ground
32
sd6*
8
Ground
33
sd7*
9
Ground
34
sdp*
10
Ground
35
Ground
11
Ground
36
Ground
12
N/C
37
N/C
13
N/C
38
TermPWR
14
N/C
39
N/C
15
Ground
40
Ground
16
Ground
41
atn*
17
Ground
42
Ground
18
Ground
43
bsy*
19
Ground
44
ack*
20
Ground
45
rst*
21
Ground
46
msg*
22
Ground
47
sel*
23
Ground
48
cd*
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE B–6
Pinout for External SCSI Connector
(continued)
Pin
Description
Pin
Description
24
Ground
49
req*
25
Ground
50
io*
Note - Pin 38 is +5V, fused and supplied by a schottkey diode.
Serial Connector
Figure B–7
TABLE B–7
Serial Connector
Pinout for Serial Connector
Description
Pin
Pin
Description
N/C
1
14
B Transmit Data
A Transmit Data
2
15
A Transmit Clock (DCE source)
A Receive Data
3
16
B Receive Data
A Request to Send
4
17
A Receive Clock
A Clear to Send
5
18
B Transmit Clock (DCE source)
A Data Set Ready
6
19
B Request to Send
Signal Ground
7
20
A Data Terminal Ready
A Carrier Detect
8
21
N/C
N/C
9
22
N/C
System Connectors 163
TABLE B–7
Pinout for Serial Connector
(continued)
Description
Pin
Pin
Description
N/C
10
23
N/C
B Data Terminal Ready
11
24
A Transmit Clock (DTE source)
B Carrier Detect
12
25
B Transmit Clock (DTE source)
B Clear to Send
13
Parallel Connector
Figure B–8
TABLE B–8
164
Parallel Connector
Pinout for Parallel Connector
Pin
Description
Pin
Description
1
Strobe
14
AutoFxDt
2
Data 0 (LSB)
15
Error
3
Data 1
16
Init
4
Data 2
17
SlctIn
5
Data 3
18
Ground
6
Data 4
19
Ground
7
Data 5
20
Ground
8
Data 6
21
Ground
9
Data 7
22
Ground
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE B–8
Pinout for Parallel Connector
(continued)
Pin
Description
Pin
Description
10
Ack
23
Ground
11
Busy
24
Ground
12
PE
25
Ground
13
Slct
13W3 Video Connector
Figure B–9
TABLE B–9
13W3 Video Connector
Pinout for 13W3 Video Connector
Pin
Description
Pin
Description
A1
Video-Red
5
Composite Sync
A2
Video-Green
6
Ground
A3
Video-Blue
7
Ground
1
Ground
8
Sense(1)
2
Ground
9
Sense(0)
3
Sense(2)
10
Ground
4
Ground
System Connectors 165
Audio Ports and Audio Module
Audio Ports
The audio ports are on all models with the SPARCclassic/SPARCclassic X/
SPARCstation LX system board (on the SPARCclassic X terminal the ports are
covered and inactive). “Signals for the Audio Ports” on page 166 gives the signals for
the audio ports.
Figure B–10
TABLE B–10
Audio Ports
Audio Ports
Line-Out
Line-In
Left Channel
Left Channel
Right Channel
Right Channel
Return
Return
Signals for the Audio Ports
Audio Line-Out Connector
Figure B–11
Audio Line-out Connector
This connector is used to connect the system audio output to a stereophonic
amplifier and external loudspeakers.
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SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Audio Line-In Connector
Figure B–12
Audio Line-in Connector
This connector is used to connect external sound sources such as a compact disc
player or cassette tape player to the system.
SCSI Connector (Internal)
Figure B–13
TABLE B–11
Internal SCSI Connector
Pinout for Internal SCSI Connector
Pin
Description
Pin
Description
1
Ground
26
+5 VDC
2
sd0*
27
N/C
3
Ground
28
N/C
4
sd1*
29
Ground
5
Ground
30
Ground
6
sd2*
31
Ground
7
Ground
32
atn*
8
sd3*
33
Ground
9
Ground
34
N/C
10
sd4*
35
Ground
System Connectors 167
TABLE B–11
Pinout for Internal SCSI Connector
(continued)
Pin
Description
Pin
Description
11
Ground
36
bsy*
12
sd5*
37
Ground
13
Ground
38
ack*
14
sd6*
39
Ground
15
Ground
40
rst*
16
sd7*
41
Ground
17
Ground
42
msg*
18
sdp*
43
Ground
19
Ground
44
sel*
20
Ground
45
Ground
21
Ground
46
cd*
22
Ground
47
Ground
23
N/C
48
reg*
24
N/C
49
Ground
25
N/C
50
io*
Diskette Drive Connector (Internal)
Figure B–14
168
Diskette Drive Connector
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
TABLE B–12
Pinout for Diskette Drive Connector
Pin
Description
Pin
Description
1
eject
18
direction
2
N/C
19
Ground
3
Ground
20
step
4
N/C
21
Ground
5
Ground
22
write data
6
N/C
23
Ground
7
Ground
24
write gate
8
Index
25
Ground
9
Ground
26
track 0
10
drive select 0
27
Ground
11
Ground
28
write protect
12
N/C
29
Ground
13
Ground
30
read data
14
N/C
31
Ground
15
Ground
32
hd select
16
motor
33
Ground
17
Ground
34
disk change
System Connectors 169
SBus Connector (Internal)
Figure B–15
TABLE B–13
170
SBus Connector
Pinout for SBus Connector
Description
Pin
Description
Pin
Pin
Description
Description
Pin
Ground
1
sb_d(31)
25
sb_clk
49
sb_d(30)
73
sb_br*
2
sb_siz(0)
26
sb_bg*
50
sb_siz(1)
74
sb_sel*
3
sb_siz(2)
27
sb_as*
51
75
sb_rd
sb_irq1*
4
sb_irq7*
28
Ground
52
Ground
76
sb_d(0)
5
29
sb_a(0)
sb_d(1)
53
77
sb_a(1)
sb_d(2)
6
sb_a(2)
30
sb_d(3)
54
sb_a(3)
78
sb_d(4)
7
sb_a(4)
31
sb_d(5)
55
79
sb_a(5)
sb_irq2*
8
sb_merr*
32
+5
56 VDC
+5 VDC
80
sb_d(6)
9
sb_a(6)
33
sb_d(7)
57
81
sb_a(7)
sb_d(8)
10
sb_a(8)
34
sb_d(9)
58
82
sb_a(9)
sb_d(10)
11
sb_a(10)
35
sb_d(11)
59
83
sb_a(11)
sb_irq3*
12
sb_err*
36
Ground
60
Ground
84
sb_d(12)
13
sb_pa(12)
37
sb_d(13)
61
85
sb_pa(13)
sb_d(14)
14
sb_pa(14)
38
sb_d(15)
62
86
sb_pa(15)
sb_d(16)
15
sb_pa(16)
39
sb_d(17)
63
87
sb_pa(17)
sb_irq4*
16
sb_ack8*
40
+5
64 VDC
+5 VDC
88
sb_d(19)
17
sb_pa(18)
41
sb_d(18)
65
89
sb_pa(19)
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Pinout for SBus Connector
TABLE B–13
(continued)
Description
Pin
Description
Pin
Pin
Description
Description
Pin
sb_d(21)
18
sb_pa(20)
42
sb_d(20)
66
90
sb_pa(21)
sb_d(23)
19
sb_pa(22)
43
sb_d(22)
67
91
sb_pa(23)
sb_irq5*
20
sb_ack32*
44
Ground
68
Ground
92
sb_d(25)
21
sb_pa(24)
45
sb_d(24)
69
93
sb_pa(25)
sb_d(27)
22
sb_pa(26)
46
sb_d(26)
70
94
sb_pa(27)
sb_d(29)
23
N.C.
47
sb_d(28)
71
95
sb_reset*
sb_irq6*
24
-12
48 VDC
+5
72 VDC
+12 VDC
96
Power Connector (Internal)
Figure B–16
TABLE B–14
Power Connector
Pinout for Power Connector
Pin
Description
Pin
Description
1
+5 Vdc
7
+5 Vdc
2
+5 Vdc
8
+5 Vdc
3
Ground
9
Ground
4
Ground
10
Ground
System Connectors 171
TABLE B–14
172
Pinout for Power Connector
(continued)
Pin
Description
Pin
Description
5
+12 Vdc
11
+12 Vdc
6
POK
12
-12 Vdc
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
APPENDIX
C
On-Board Diagnostics
This appendix explains On-Board Diagnostic tests. The following topics and tests are
described.
4 “Running the On-Board Diagnostics” on page 173
4 “Test <alias name>, Test <device path>” on page 175
4 “Test-all” on page 176
4 “Watch-clock” on page 176
4 “Watch-net, Watch-aui, Watch-tpe and Watch-net-all” on page 176
4 “Probe-scsi, Probe-scsi-all” on page 178
4 “Test-memory” on page 178
4 “Returning to the Monitor Prompt” on page 179
You have access to a number of additional tests in the boot PROM called On-Board
Diagnostics. To invoke these tests, you must enter the Forth Toolkit.
Caution - To run the On-Board Diagnostics, you must halt the system in an orderly
manner. When the operating system or any other standalone program has already
booted, do not press Stop-a to halt the system. Abruptly aborting program execution
may cause damage to data files.
Running the On-Board Diagnostics
1. Save all your work and quit all applications.
Consult your software documentation for instructions on ending a work session
and saving your files.
173
2. Return to the operating system environment.
If you are in a windowing environment, exit from it and wait for the operating
system prompt to appear. See the documentation supplied with your windowing
system.
3. Halt the operating system.
See the documentation supplied with your operating system for instructions on
how to halt it.
For example, if you are using the Solaris 2.x operating system:
a. At the system prompt, type su and press Return.
b. Type your superuser password and press Return.
4. To inform other system users of your intentions, and to then halt the system
use Step c.
5. To halt the system immediately, continue with Step d.
a. Type /usr/sbin/shutdown +5 and press Return.
The example above uses 5 minutes for a warning period to other system users.
Use appropriately chosen switch settings to inform other system users of your
intentions (see shutdown(1)). Continue with Step 4.
b. Type /usr/sbin/init 0 and press Return.
For example, to halt the system immediately type:
nevada% su
Password: welcome(Password does not appear on screen.)
nevada# /usr/sbin/init 0
See the documentation supplied with your operating system for instructions on how
to halt it. The system synchronizes the file systems and brings you to either the > or
ok prompt.
If you see the ok prompt, skip ahead to step 5; otherwise, continue with step 4.
1. Enter n at the > prompt to get to the ok prompt.
2. Enter reset at the ok prompt.
3. When you see the system banner, press Stop-a to access the Forth Toolkit.
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4. Enter help diag at the ok prompt to get a list of tests that comprise the
On-Board Diagnostics.
5. Enter the name of the test you wish to execute.
The following example shows a list of On-Board Diagnostic tests.
Note - There are no “SCSI device” or “floppy disk drive” tests for the SPARCclassic
X terminal.
ok help diag
Category: Diag (diagnostic routines)
test
device-specifier ( -- ) run selftest method for specified device
Examples:
test /memory
- test memory
test /iommu/sbus/ledma/le
- test net
test floppy
- test floppy disk drive
test net
- test net (device-specifier is an alias)
test scsi
- test scsi(device-specifier is an alias)
watch-clock
(--)
show ticks of real-time clock
watch-net
(--)
- monitor broadcast packets using auto-selected interface
watch-aui
(--)
- monitor broadcast packets using AUI interface
watch-tpe
(--)
- monitor broadcast packets using TPE interface
watch-net-all
(--)
- monitor broadcast packets on all net interfaces
probe-scsi
(--)
- show attached SCSI devices
probe-scsi-all
(--)
- show attached SCSI devices for all host adapters
test-all
(--)
- execute test for all devices with selftest method
test-memory
(--)
- test all memory if diag-switch? is true, otherwise test memory
specified by selftest-#megs
Test <alias name>, Test <device path>
The test command, combined with a device alias or device path name, will execute
that device self-test program. If a device has no self-test program, this message will
be displayed: No selftest method for <device name>. To run the self-test
program for a device, type the test command followed by the device alias or device
path name. An example is shown below.
ok test floppy
Testing floppy disk system. A formatted disk should be in the drive.
Test succeeded.
On-Board Diagnostics
175
Test-all
The test-all command tests all devices in the system that have a self-test program.
Tests are executed in order, using the device tree (viewed with the show-devs
command) as reference. Disks, tapes, and CD-ROMs are not tested by test-all.
Watch-clock
This test reads a register in the NVRAM/TOD (Nonvolatile RAM/Time of Day) chip
on the main logic board and displays the result as a seconds counter. The counter
should count from 0 to 59 repeatedly until you interrupt it by pressing any key on
the keyboard.
The following screen gives you an example of a watch-clock test.
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
Watch-net, Watch-aui, Watch-tpe and Watch-net-all
These tests monitor broadcast Ethernet packets on the Ethernet cable(s) connected to
the system. Good packets received by the system are indicated by a period (.)
displayed on the screen. Errors are indicated with an X and the error description.
For example:
ok watch-net
Internal loopback test -- succeeded.
External loopback test -- Auto-selecting Ethernet cable I/F
Trying AUI
Received packet on AUI
Select cable - AUI
succeeded.
Looking for Ethernet packets.
’.’ is a good packet. "X" is a bad packet.
Type any key to stop.
.........................................................................................................
SPARCclassic and SPARCstation LX systems have two types of on-board Ethernet
interfaces, 10BaseT (also called twisted-pair Ethernet or TPE) and 10Base5 (also
called thick Ethernet or AUI). Only one on-board interface may be connected at a
time. The system can automatically select which interface is connected and active.
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The AUI port is first tested by transmitting packets and checking for No Carrier or
response packets. If the AUI test fails, the TPE port is then tested.
Entering watch-net causes this automatic selection to take place. You may see these
messages:
ok watch-net
Internal loopback test -- succeeded.
External loopback test -- Auto-selecting Ethernet cable I/F
Trying AUI
AUI Carrier Loss
Trying TPE
Received packet on TPE
Select cable - TPE
succeeded
You may also control the selection of Ethernet interfaces to monitor by using specific
commands. Use watch-tpe to monitor the 10BaseT (TPE) connection or watch-aui to
monitor the 10Base5 (thicknet) connection.
For example:
ok watch-tpe
Internal loopback test -- succeeded.
External loopback test -- succeeded.
Looking for Ethernet packets.
‘.’ is a good packet. ‘X’ is a bad packet.
Type any key to stop.
...............................................................
The watch-net-all command monitors Ethernet packets on any Ethernet interface
installed in the system. For example, if you have an SBus Ethernet card installed in
one of the system SBus slots, watch-net-all will start by monitoring Ethernet
transmissions detected by that card.
When you interrupt the test on that interface by pressing any key, watch-net-all then
goes on to test the next Ethernet interface it finds in the system.
For example:
ok watch-net-all
/iommu@f,e0000000/sbus@f,e0001000/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.
...................................................................................(keyboard key pressed h
/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.
On-Board Diagnostics
177
Type any key to stop.
.........................................................................................................
Probe-scsi, Probe-scsi-all
The probe-scsi test sends an inquiry command to internal and external SCSI devices
connected to the system’s on-board SCSI. This test is not applicable to the
SPARCclassic X terminal. If a SCSI device is connected and powered up, the target
address, unit number, device type, and manufacturer name should be displayed.
For example:
ok probe-scsi
Target 3
Unit 0 Disk SEAGATE ST1480 SUN04245828 Copyright (c) 1991 Seagate All rights reserved.
The probe-scsi-all test sends an inquiry command to all SCSI devices on all the SCSI
host adapters installed in the system. The first identifier listed in the display is the
SCSI host adapter address in the system device tree, followed by the SCSI device
identification data.
For example:
ok probe-scsi-all
/iommu@f,e0000000/sbus@f,e0001000/dma@1,81000/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
All of the system main memory will be tested if the system diag-switch? parameter
is True. If the diag-switch? parameter is False, this test uses the selftest-#megs
parameter in NVRAM to determine how much memory to test. The default for the
selftest-#megs parameter is 1, so only 1 megabyte of memory is tested.
To change the amount of memory tested using the selftest-#megs parameter, type this
command:
ok setenv selftest-#megs 16
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This sets the desired memory size to 16 megabytes. Any whole number may be used
as long as it does not exceed the actual size of memory (in megabytes) installed in
the system. When the test-memory diagnostic is running, the number of megabytes
being tested is displayed and counted down to zero during the test.
See the Open Boot Command Reference for a detailed description and step-by-step
instructions for the available on-board diagnostic tests.
Returning to the Monitor Prompt
If you need to return to the monitor prompt from the Forth Toolkit, type old-mode
at the > prompt.
ok old-mode
>
On-Board Diagnostics
179
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Glossary
AUI
address
Attachment Unit Interface is an Ethernet adapter cable.
A location within a computer system’s memory. The word location is
a synonym. Reference is usually made to an address for the purpose
of retrieving or storing information.
board
See printed circuit board.
boot
To load the system software into memory and start it running.
boot PROM
The PROM chip on the main logic board. This chip contains boot
code consisting of a Forth Monitor program. The boot PROM is
connected to the I/O data bus.
boot PROM
diagnostics
The diagnostic firmware contained in the boot PROM. These
diagnostics include the Power-On Self-Test (POST) and On-Board
Diagnostics.
cables
Wires or bundles of wires configured with connectors at each end
and used to connect two or more hardware devices.
cache
A mechanism for accelerating a microprocessor’s performance. A
cache is a small, fast memory between the microprocessor and main
memory. It quickens a microprocessor’s access time to main
memory. It also stores the most recently used information (data,
instructions, etc.), and provides such information again to the
microprocessor more rapidly than could main memory.
card
See printed circuit board.
CPU
Central Processing Unit.
Glossary-181
CRU
Customer Replaceable Unit.
Desktop Backup
Pack
An external unit containing a tape drive that can be connected to a
Desktop SPARCstation.
Desktop Disk Pack
An external unit containing a disk drive that can be connected to a
Desktop SPARCstation.
Desktop Storage
Module
Desktop Storage
Pack (DSP)
An external data storage that contains a disk drive or a tape drive.
Desktop SunCD
Pack
Diagnostic
Executive
disk
An external unit containing a compact disc drive.
disk drive
The mechanism that rotates a disk.
diskette
A removable disk of magnetic medium for storing software and
information. The outer jacket of the diskette is made of firm plastic
that measures 3.5 inches (88.9 millimeters) across.
diskette drive
A device that reads and writes diskettes. The diskette drive access is
located on the front panel of the system units. A diskette drive is
optional on both SPARCclassic and SPARCstation LX systems.
DRAM
Dynamic Random Access Memory.
DSIMM
DRAM Single In-line Memory Module. A small printed circuit card
that contains dynamic random access memory (DRAM) chips.
ESM
External Storage Module. An external unit that contains disk and/or
tape drive(s) that can be connected to a Desktop SPARCstation.
Glossary-182
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
A generic name for an external unit containing a tape drive, a disk
drive, or a CD-ROM drive that can be connected to a Desktop
SPARCstation. The external unit containing the tape drive is
referred to as the Desktop Backup Pack. The external unit
containing a disk drive is specifically referred to as the Desktop
Disk Pack. The external unit containing a compact disc drive is
specifically referred to as the Desktop SunCD Pack.
See SunDiagnostic Executive.
A round platter, or set of platters, coated with magnetic medium
and organized into concentric tracks for storing data.
Forth
A high-level programming language. A major feature of Forth is
that user-defined operators can be used as if they are primitives.
Forth Toolkit
An interactive command interpreter based on the Forth
programming language. While in the Toolkit, you will see the ok
prompt. The Toolkit gives you access to an extensive set of functions
for performing fault isolation and debugging.
frame buffer board
A printed circuit board that can be installed in an SBus slot of the
system unit that controls a video display.
ID
Identification.
I/O
Input/Output. For example, an input/output device.
IU
Integer Unit.
LED
Light-Emitting Diode.
monitor (1)
Indicated by the > prompt. From the > prompt, you can boot the
system, continue the execution of a halted program, or enter the
Forth Toolkit. If disaster befalls your operating system, the monitor
automatically starts.
monitor (2)
A video display unit that is part of a Desktop SPARCstation. It is
not synonymous with the term terminal.
NVRAM
Nonvolatile RAM.
On-Board
Diagnostics
A test that allows you to test the control registers, the network
controller, the diskette drive system, memory, the cache, the system
clock, and watch the network for valid packets.
POR
Power-On Reset TTL open collector signal from the power supply,
which is activated after DC voltages have risen.
POST
Power-On Self-Test. The POST runs automatically when you turn on
the system’s power switch or reboot the system. The POST, stored
in the boot PROM, is a series of rudimentary tests designed to
verify that a viable boot path exists for loading more extensive
diagnostic software, such as the Diagnostic Executive.
PTC
Positive Temperature Coefficient. A self-healing device that replaces
a fuse. After an error occurs, the PTC resets.
Glossary-183
printed circuit board
Any board with electronic wiring etched on it.
PROM
Programmable Read Only Memory.
RAM
Random Access Memory.
ROM
Read Only Memory.
SBus card
A printed circuit board installed in an SBus slot of the system unit.
SCSI
Small Computer System Interface; pronounced “scuzzy.”
SunDiagnostic
Executive
An independent operating system running exhaustive subsystem
tests independent of SunOS. Use the SunDiagnostic Executive after
you have run POST and need to troubleshoot which part needs to
be replaced.
Sundiag System
Exerciser
Diagnostic software that runs under SunOS; displays real-time use
of system resources and peripheral equipment such as Desktop
Storage Packs and External Storage Modules.
system monitor
See Monitor (1) or (2).
terminal
A device comprising a video display and keyboard that are used to
type and display information. A terminal may be connected to
either of the RS-232 serial interface ports on the back panel of the
SPARCstation system unit. It is not synonymous with the term
monitor.
TOD
Time-of-Day clock.
VRAM
Video Random Access Memory.
VSIMM
VRAM Single In-line Memory Module. A small printed circuit card
that contains video random access memory (VRAM) chips.
wrist strap
A device that provides grounding for static electricity between your
body and the system unit’s chassis. Electric current and voltage do
not pass through the wrist strap.
Glossary-184
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
Index
Index-185
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