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5-52 FRU Removal and Replacement
5.5.20 CPU Board Removal and Replacement (Model 400s)
Refer to Figure 5-38 and follow these steps to remove the CPU board. Reverse these
steps to replace the CPU board.
1. Remove the top and side covers. Disconnect all cables connected to the CPU
board connectors.
2. If you have already removed the HP-IB (or blank) plate to access the converter
board, skip this step.
Remove the HP-IB (or blank) plate’s two right side screws, two top screws, and
the one bottom screw. Do not remove the two left side screws holding the plate to
the CPU board’s backplate.
3. Remove the four screws on the chassis’ left side holding the CPU board’s back-
plate to the chassis.
4. Remove the two screws (top and bottom) on the CPU board backplate holding it
to the chassis.
*
5. Insert a flat-tipped screwdriver through the rear one of the two, large chassis
holes on the left side (near the LAN connectors) and put its tip in the CPU board’s
removal slot. The front hole is used to lever the CPU board into its connectors.
6. Pry the CPU board free from its motherboard connectors, then remove the flat-
tipped screwdriver.
NOTICE: Apply mild pressure to unseat the CPU board. If
it does not unseat easily, check to see that all the
screws are removed.
7. Remove the CPU board.
NOTICE: If the CPU board is being replaced, the EEPROM
should be removed from the CPU board being re
-
placed and installed in the new CPU board. This
keeps the Boot Mode Selection, Auto System Se
-
lect, and Internal I/O Configuration information
intact and does not have to be reconfigured. Sys
-
tem Unit identification is maintained for operating
system and application requirements. The
EEPROM from the new CPU board should be in-
stalled on the failed CPU board.
- Series 400 Workstations 1
- Emissions Regulations 3
- VCCI Class 1 ITE Equipment 4
- VCCI Class 2 ITE Equipment 4
- Preface 7
- Audience 8
- Domain/OS Related Manuals 8
- HP-UX Related Manuals 9
- Documentation Conventions 10
- Contents 11
- Contents xiii 13
- Domain/OS Systems 15
- Contents xvii 17
- Contents xix 19
- Procedures 21
- Chapter 1 23
- 1.1 Introduction 24
- 1-4 Product Overview 26
- 1.2 Physical Configuration 27
- 1-8 Product Overview 30
- 1.5 Introduction 31
- 1.6 Physical Configuration 33
- 1-16 Product Overview 38
- Chapter 2 41
- 2-2 System Controls 42
- System Controls 2-3 43
- 2.2 Monitor Controls 46
- System Controls 2-7 47
- 2-8 System Controls 48
- 2.3 LED Indicator Lights 49
- Chapter 3 51
- 3-4 Theory of Operation 54
- Theory of Operation 3-5 55
- 3-6 Theory of Operation 56
- Theory of Operation 3-7 57
- 3-8 Theory of Operation 58
- 3.2 FRU-Level Operation 59
- Uncorrectable Memory Error 65
- 3-20 Theory of Operation 70
- Chapter 4 71
- Compatible Mode 73
- 4-4 Fault Isolation 74
- Figure 4-1. Main Flowchart 74
- Fault Isolation 4-5 75
- 4-6 Fault Isolation 76
- Fault Isolation 4-7 77
- 4-8 Fault Isolation 78
- Fault Isolation 4-9 79
- 4-10 Fault Isolation 80
- Fault Isolation 4-11 81
- 4-12 Fault Isolation 82
- Fault Isolation 4-13 83
- 4-16 Fault Isolation 86
- 4.3 Mnemonic Debugger Level 87
- 4-22 Fault Isolation 92
- 4.4 The sysboot Program 95
- 4.5 Online Level 96
- Fault Isolation 4-29 99
- 4-30 Fault Isolation 100
- Fault Isolation 4-31 101
- 4.9 Boot ROM Self-Tests 108
- Fault Isolation 4-43 113
- Fault Isolation 4-45 115
- Fault Isolation 4-47 117
- Fault Isolation 4-49 119
- 4.10 Test Mode 122
- CONTINUE AT OWN RISK 123
- RETURN To Continue 123
- Memory Failed at (address) 124
- (W:BBCCDDEE, R:BBCCDDEF) 124
- PARITY BIT ERROR AT (address) 124
- 4-56 Fault Isolation 126
- Fault Isolation 4-57 127
- Part 3 Checkout Procedures 130
- Fault Isolation 4-61 131
- 4-62 Fault Isolation 132
- Fault Isolation 4-67 137
- J001 14 137
- Domain Compatible Mode 139
- Compatible Mode 147
- Chapter 5 149
- 5.3 System Assemblies 150
- 5.5 System Unit Assemblies 172
- (Continued) 227
- Appendix A 235
- A-2 FRU Confi gurations 236
- A-6 FRU Confi gurations 240
- FRU Confi gurations A-7 241
- FRU Confi gurations A-11 245
- Hard Disk Drive 245
- A-12 FRU Confi gurations 246
- Tape Drive 246
- FRU Confi gurations A-13 247
- A-14 FRU Confi gurations 248
- Appendix B 249
- Appendix C 253
- C-2 Confi guring the EEPROM 254
- C.4 I/O Configuration Mode 264
- Configure Mode Failed 265
- Configuration EEPROM Failed 265
- 1 Select Code 9 268
- used select codes are : 268
- 12 14 15 21 268
- C.5 Auto System Select Mode 277
- Appendix D 283
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