4-66 Fault Isolation
4. If the dc output voltages are present at J004, but not within tolerance, perform
the following six steps:
A. Power off the system and unplug the ac power cord from the wall outlet.
Replace the power supply.
B. If the problem persists, you must check for power loading. Power off the
system and unplug the power cord from the wall outlet. Remove one option
board (graphics, network, or HP-IB) from its board slot (refer to Chapter 5
for information about removing the board). Plug the power cord into the ac
wall outlet and power on the system. Recheck the voltages. If necessary,
repeat this procedure for a second option board. If you replace a defective
board, configure any switches or jumpers the same as on the original board
(refer to Appendix B).
C. If the cause of the problem isn’t an option board, power off the system and
unplug the power cord from the ac outlet. Reinstall the board(s) in its slot.
D. Unplug connector P2 from the disk drive. Power on the system unit and
recheck the voltages. If necessary, repeat this step on a second disk drive.
Replace the disk drive if the voltages are now within specifications (see
Chapter 5).
E. If the problem persists, replace the CPU/Motherboard (see Chapter 5) and
repeat this procedure.
F. After you verify that the power supply voltages are within the specified
ranges, power off the system and unplug the ac cord from the wall outlet.
Replace the system unit cover. Make sure that all of the internal connec-
tions are secure.
5. If the dc output voltages are within tolerance, perform the following three
steps:
A. If the fan does not operate, replace the power supply.
B. If the display outlet ac voltage is incorrect, replace the power supply.
C. If the power LED is not on, replace the Power-On Switch Panel. If the
LED still doesn’t light, replace these FRUs in the following order:
Ribbon Cable (connects LED board to CPU board)
LED Board
CPU Board
You can check the LED board and CPU board before you replace them by
checking the power LED circuits for continuity as shown in Table 4-19.
Check for continuity with Connectors J004 and J002 unplugged. Refer to
Figure 4-18 for the locations of the connectors and pins listed in
Table 4-19.
Summary of Contents for Apollo 9000 400dl
Page 4: ...iv VCCI Class 1 ITE Equipment VCCI Class 2 ITE Equipment ...
Page 6: ...vi ...
Page 22: ......
Page 26: ...1 4 Product Overview Figure 1 1 HP Apollo Model 400t or Model 400dl Workstation ...
Page 40: ......
Page 42: ...2 2 System Controls Figure 2 1 Model 400t and 400dl System ...
Page 54: ...3 4 Theory of Operation Figure 3 1 Model 400t System Block Diagram ...
Page 55: ...Theory of Operation 3 5 Figure 3 2 Model 400dl System Block Diagram ...
Page 57: ...Theory of Operation 3 7 Figure 3 4 Model 400s DIO II System Unit Functional Block Diagram ...
Page 58: ...3 8 Theory of Operation Figure 3 5 Model 400s ISA System Unit Functional Block Diagram ...
Page 70: ...3 20 Theory of Operation Figure 3 6 Model 400s System Unit Power Distribution Diagram ...
Page 74: ...4 4 Fault Isolation Figure 4 1 Main Flowchart ...
Page 75: ...Fault Isolation 4 5 Figure 4 1 Main Flowchart Cont ...
Page 76: ...4 6 Fault Isolation Figure 4 2 Model 400t and 400dl System Power LED Not On ...
Page 77: ...Fault Isolation 4 7 Figure 4 3 Model 400s System Power LED Not On ...
Page 78: ...4 8 Fault Isolation Figure 4 4 Domain Keyboard Problems ...
Page 79: ...Fault Isolation 4 9 Figure 4 5 Problems with Display ...
Page 80: ...4 10 Fault Isolation Figure 4 6 Diskless Node Partnering Problems ...
Page 81: ...Fault Isolation 4 11 Figure 4 7 Problems with Winchester Disk ...
Page 82: ...4 12 Fault Isolation Figure 4 8 Problems While Booting ...
Page 83: ...Fault Isolation 4 13 Figure 4 9 Node Causes Network Problems ...
Page 86: ...4 16 Fault Isolation Figure 4 10 Diagnostic Relationships for Domain OS Compatible Mode ...
Page 99: ...Fault Isolation 4 29 Figure 4 13 HP UX Compatible Mode Main Troubleshooting Flowchart ...
Page 100: ...4 30 Fault Isolation Figure 4 14 HP UX Compatible Mode Boot Flowchart ...
Page 101: ...Fault Isolation 4 31 Figure 4 14 HP UX Compatible Mode Boot Flowchart Cont ...
Page 131: ...Fault Isolation 4 61 Figure 4 17 System Unit Cover Removal Model 400t and Model 400dl ...
Page 132: ...4 62 Fault Isolation Figure 4 18 Power Connections Model 400t and Model 400dl ...
Page 148: ......
Page 151: ...FRU Removal and Replacement 5 3 Figure 5 1 System Unit Cover Removal Model 400t and 400dl ...
Page 152: ...5 4 FRU Removal and Replacement Figure 5 2 System Components Model 400t and 400dl ...
Page 181: ...FRU Removal and Replacement 5 33 Figure 5 26 Model 400s Front Door Removal ...
Page 183: ...FRU Removal and Replacement 5 35 Figure 5 27 Model 400s Bezel Removal ...
Page 193: ...FRU Removal and Replacement 5 45 Figure 5 34 Model 400s ISA Backplane Removal ...
Page 195: ...FRU Removal and Replacement 5 47 Figure 5 35 Model 400s ISA Card Cage Removal ...
Page 205: ...FRU Removal and Replacement 5 57 Figure 5 40 Model 400s Memory Board Removal ...
Page 209: ...FRU Removal and Replacement 5 61 Figure 5 43 Model 400s ISA Center Wall Removal ...
Page 211: ...FRU Removal and Replacement 5 63 Figure 5 44 Model 400s Standard ISA Motherboard Removal ...
Page 213: ...FRU Removal and Replacement 5 65 Figure 5 45 Model 400s 3 Slot DIO II Card Cage Removal ...
Page 215: ...FRU Removal and Replacement 5 67 Figure 5 46 Model 400s DIO II Center Wall Removal ...
Page 217: ...FRU Removal and Replacement 5 69 Figure 5 47 Model 400s DIO II Motherboard Removal ...
Page 221: ...FRU Removal and Replacement 5 73 Figure 5 49 Model 400s LED Board Removal ...
Page 234: ......
Page 236: ...A 2 FRU Configurations Figure A 1 CPU Board Configurations ...
Page 240: ...A 6 FRU Configurations Figure A 5 Alternate 802 5 Network Controller AT Jumper Configuration ...
Page 282: ......