Sun Microsystems 2 User manual

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

1991 by Sun Microsystems, Inc.—Printed in USA.
2550 Garcia Avenue, Mountain View, California 94043-1100
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The OPEN LOOK and the Sun Graphical User Interfaces were developed by Sun
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Xerox in researching and developing the concept of visual or graphical user interfaces for
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subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data
and Computer Software clause at DFARS 252.227-7013 (October 1988) and FAR 52.227-19
(June 1987).
The product described in this manual may be protected by one or more U.S. patents,
foreign patents, and/or pending applications.
TRADEMARKS
The Sun logo, Sun Microsystems, Sun Workstation, NeWS, and SunLink are registered
trademarks of Sun Microsystems, Inc. in the United States and other countries.
Sun, Sun-2, Sun-3, Sun-4, Sun386i, SunCD, SunInstall, SunOS, SunView, NFS, and
OpenWindows are trademarks of Sun Microsystems, Inc.
UNIX and OPEN LOOK are registered trademarks of UNIX System Laboratories, Inc.
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X Window System is a product of the Massachusetts Institute of Technology.
SPARC is a registered trademark of SPARC International, Inc. Products bearing the
SPARC trademark are based on an architecture developed by Sun Microsystems, Inc.
SPARCstation is a trademark of SPARC International, Inc., licensed exclusively to Sun
Microsystems, Inc.
All other products or services mentioned in this document are identified by the
trademarks, service marks, or product names as designated by the companies who market
those products. Inquiries concerning such trademarks should be made directly to those
companies.

iii
Contents
About This Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
1. System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Major Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Main Logic Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CPU Core. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SBus Slots. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Memory Management Unit+. . . . . . . . . . . . . . . . . . . . . . . . 10
S4 DMA+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Dynamic RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Eight Bit Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Single Inline Memory Modules (SIMMs). . . . . . . . . . . . . . . . . 14
SBus Boards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Mass Storage Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

iv SPARCstation 2 Field Service Manual—February 1991
Monitors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2. Diagnostics Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
How It Fits Together. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
When to Use Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Boot PROM Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Power-On Self-Test (POST) . . . . . . . . . . . . . . . . . . . . . . . . . 24
On-Board Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Sundiag System Exerciser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SunDiagnostic Executive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Monitor and Forth Toolkit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3. Preparing to Work on the System . . . . . . . . . . . . . . . . . . . . . . . . 33
Halting the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Tools Needed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Disconnecting Desktop Storage Packs . . . . . . . . . . . . . . . . . . . 36
Disconnecting External Storage Modules . . . . . . . . . . . . . . . . 36
Removing the System Unit’s Cover . . . . . . . . . . . . . . . . . . . . . 37
Attaching a Wrist Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4. FRU Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Removing and Replacing FRUs . . . . . . . . . . . . . . . . . . . . . . . . 42
FRU Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Single Inline Memory Modules (SIMMs) . . . . . . . . . . . . . 46
Determining Faulty SIMM Locations. . . . . . . . . . . . . . . . . . . . 46
SBus Boards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Contents v
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Hard Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Diskette Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Main Logic Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Serial Port Jumpers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Main Logic Board Voltage Test Points . . . . . . . . . . . . . . . . 79
Before Replacing the Main Logic Board . . . . . . . . . . . . . . 83
Removing the Main Logic Board . . . . . . . . . . . . . . . . . . . . 88
Preparing Main Logic Board for Replacement . . . . . . . . . 89
Replacing the Main Logic Board. . . . . . . . . . . . . . . . . . . . . 90
Boot PROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
NVRAM/TOD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Speaker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Replacing the System Unit’s Cover . . . . . . . . . . . . . . . . . . . . . 98
Connecting the Desktop Storage Pack . . . . . . . . . . . . . . . . . . . 99
Connecting the External Storage Module . . . . . . . . . . . . . . . . 99
Video Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Mouse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
How to Turn the Power Back On . . . . . . . . . . . . . . . . . . . . . . . 100
A. System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Regulatory Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Input Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

vi SPARCstation 2 Field Service Manual—February 1991
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
B. Illustrated Parts Breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Parts Breakdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
C. FRU List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
FRU List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
D. Open Boot PROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Open Boot PROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125

vii
Figures
Figure 1-1 SPARCstation 2 Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 1-2 Top View of the System With the Cover Removed . . . . . . . . . 3
Figure 1-3 The Workstation’s Main Logic Board. . . . . . . . . . . . . . . . . . . . . 4
Figure 1-4 Block Level Diagram of the Main Logic Board . . . . . . . . . . . . . 7
Figure 2-1 Default Boot Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 2-2 Arrangement of Keyboard LEDs. . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 2-3 Keyboard LED Diagnostic Codes. . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 2-4 Location of SIMM Slots in System Unit . . . . . . . . . . . . . . . . . . . 27
Figure 2-5 SIMM Slot Locations on Main Logic Board. . . . . . . . . . . . . . . . 28
Figure 2-6 Halting the System and Displaying On-Board Diagnostics . . 30
Figure 3-1 System Unit Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 3-2 The System Unit’s Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 4-1 Top View of the System With the Cover Removed . . . . . . . . . 43
Figure 4-2 Boards and Modules (continued on next page) . . . . . . . . . . . . 44
Figure 4-2 Boards and Modules (continued) . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 4-3 SIMM Extraction Tool. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

viii SPARCstation 2 Field Service Manual—February 1991
Figure 4-4 Inserting the SIMM Extraction Tool . . . . . . . . . . . . . . . . . . . . . . 49
Figure 4-5 Final Manual Removal of a SIMM . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 4-6 Location of SIMM Slots in System Unit . . . . . . . . . . . . . . . . . . . 51
Figure 4-7 SIMM Slot Location on Main Logic Board. . . . . . . . . . . . . . . . . 52
Figure 4-8 4 Megabyte SIMM: Horizontally-mounted Chips . . . . . . . . . . 53
Figure 4-9 Removing and Replacing the Power Supply. . . . . . . . . . . . . . . 60
Figure 4-10 Hard Disk Drive with 6 Jumpers—Jumper Setting for Drive 1 64
Figure 4-11 Hard Disk Drive with 5 Jumpers—Jumper Setting for Drive 1 64
Figure 4-12 Hard Disk Drive with 6 Jumpers—Jumper Setting for Drive 2 65
Figure 4-13 Hard Disk Drive with 5 Jumpers—Jumper Setting for Drive 2 65
Figure 4-14 Removing and Replacing the Hard Disk Drive. . . . . . . . . . . . . 67
Figure 4-15 Connecting Power and Data Cables to the Hard Disk Drive . 68
Figure 4-16 Removing and Replacing the Diskette Drive . . . . . . . . . . . . . . 70
Figure 4-17 Connecting Power and Data Cables to the Diskette Drive . . . 72
Figure 4-18 Removing and Replacing the Fan Assembly. . . . . . . . . . . . . . . 74
Figure 4-19 Connecting "Y" Power Cable to Fan Assembly. . . . . . . . . . . . . 75
Figure 4-20 Top View of System Unit’s Internal Parts . . . . . . . . . . . . . . . . . 77
Figure 4-21 Serial Port Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 4-22 Preset RS-423 Jumper Positions. . . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 4-23 RS-232 Jumper Positions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Figure 4-24 Pin Location of Power Supply Connector (J0701). . . . . . . . . . . 80
Figure 4-25 Main Logic Board Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Figure 4-26 Removing and Replacing the Main Logic Board . . . . . . . . . . . 92
Figure 4-27 Replacing the System Unit’s Cover. . . . . . . . . . . . . . . . . . . . . . . 99
Figure B-1 System Interconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Figures ix
Figure B-2 Exploded View of the System Unit. . . . . . . . . . . . . . . . . . . . . . . . . 109
Figure B-3 Exploded View of the System Unit Showing Drive Bracket. . . . 110
Figure B-4 Exploded View of the Main Logic Board in the System Unit. . . 111

xSPARCstation 2 Field Service Manual—February 1991