Microprocessor
removal
.
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. 117
SCSI
backplane
.
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. 118
Hot-swap
board
.
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. 119
Front-panel
assembly
.
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. 120
Power
backplane
.
.
.
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. 121
AC
power
box
.
.
.
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. 122
System
board
and
shuttle
.
.
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. 123
Thermal
grease
.
.
.
.
.
.
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. 125
Chapter
6.
Symptom-to-FRU
index
.
.
.
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. 127
Beep
symptoms
.
.
.
.
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. 127
No-beep
symptoms
.
.
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. 130
Diagnostic
panel
system
error
LED
.
.
.
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. 130
Diagnostic
error
codes
.
.
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. 133
Error
symptoms
.
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. 138
Power-supply
LED
errors
.
.
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.
. 145
POST
error
codes
.
.
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. 146
Service
processor
error
codes
.
.
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.
.
. 153
SCSI
error
codes
.
.
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.
. 153
Temperature
error
messages
.
.
.
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.
. 153
Fan
error
messages
.
.
.
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.
. 154
Power
error
messages
.
.
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.
. 154
System
shutdown
.
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. 155
Voltage
related
system
shutdown
.
.
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.
.
. 155
Temperature
related
system
shutdown
.
.
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.
. 155
DASD
checkout
.
.
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.
. 156
Host
built-in
self
test
(BIST)
.
.
.
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.
. 156
Bus
fault
messages
.
.
.
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.
. 156
Undetermined
problems
.
.
.
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.
.
. 157
Problem
determination
tips
.
.
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.
.
. 158
Chapter
7.
Parts
listing,
Type
8685
.
.
.
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.
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.
.
. 159
System
.
.
.
.
.
.
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. 160
Keyboard
CRUs
.
.
.
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.
. 162
Power
cord
CRUs
.
.
.
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.
.
. 163
Appendix
A.
Getting
help
and
technical
assistance
.
.
.
.
.
.
.
.
.
. 165
Before
you
call
.
.
.
.
.
.
.
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.
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.
.
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.
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.
.
. 165
Using
the
documentation
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
. 165
Getting
help
and
information
from
the
World
Wide
Web
.
.
.
.
.
.
.
.
. 165
Software
service
and
support
.
.
.
.
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.
.
.
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.
.
.
.
.
.
.
.
. 166
Hardware
service
and
support
.
.
.
.
.
.
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.
.
.
.
.
.
. 166
Appendix
B.
Related
service
information
.
.
.
.
.
.
.
.
.
.
.
.
.
. 167
Safety
information
.
.
.
.
.
.
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.
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.
.
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.
.
.
.
.
. 167
General
safety
.
.
.
.
.
.
.
.
.
.
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.
.
.
.
.
.
.
.
. 167
Electrical
safety
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
. 168
Safety
inspection
guide
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
. 169
Handling
electrostatic
discharge-sensitive
devices
.
.
.
.
.
.
.
.
.
. 170
Grounding
requirements
.
.
.
.
.
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.
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.
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.
.
. 170
Safety
notices
(multilingual
translations)
.
.
.
.
.
.
.
.
.
.
.
.
.
. 170
Appendix
C.
Notices
.
.
.
.
.
.
.
.
.
.
.
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.
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.
.
.
.
.
. 209
Edition
notice
.
.
.
.
.
.
.
.
.
.
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.
.
.
.
.
.
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.
.
. 209
Trademarks
.
.
.
.
.
.
.
.
.
.
.
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.
.
.
.
.
.
.
.
. 210
Important
notes
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
. 210
Contents
vii
Summary of Contents for XSERIES 255 TYPE 8685
Page 1: ...xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide ERserver...
Page 2: ......
Page 3: ...xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide ERserver...
Page 6: ...iv xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide...
Page 20: ...10 xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide...
Page 126: ...116 xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide...
Page 189: ...Appendix B Related service information 179...
Page 190: ...180 xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide...
Page 191: ...Appendix B Related service information 181...
Page 192: ...182 xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide...
Page 193: ...Appendix B Related service information 183...
Page 194: ...184 xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide...
Page 195: ...Appendix B Related service information 185...
Page 196: ...186 xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide...
Page 209: ...Appendix B Related service information 199...
Page 210: ...200 xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide...
Page 211: ...Appendix B Related service information 201...
Page 212: ...202 xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide...
Page 213: ...Appendix B Related service information 203...
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Page 224: ...214 xSeries 255 Type 8685 Hardware Maintenance Manual and Troubleshooting Guide...
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Page 226: ...Part Number 24P2936 1P P N 24P2936...