4-72 Fault Isolation
C. Switch the system unit power off and remove the power supply screws and
slide the power supply out about 3 inches. Switch the power on and mea-
sure the voltages on the two power supply connectors as shown in
Figure 4-22 and Figure 4-23 (leave the connectors connected to the power
supply and measure the voltages through the rear of the connectors). If the
voltages are not present, go to Step D. If the voltages are present, go to
Step E.
D. Check Pin 24 on the large connector shown in Figure 4-22 for + 5 V dc. If
the voltage is not correct, replace the power supply.
If the voltage is correct at Pin 24, close the power-on switch. If you read
Pin 24 at ground, replace the power supply. If you still 5 volts,
replace the power-on switch. If the new switch doesn’t fix the problem, go
to Step E.
E. Either the power distribution cable, motherboard, or CPU board are defec-
tive. Check the power distribution cable for continuity. If the power distri-
bution cable is defective, replace it. Otherwise, replace the CPU board and
recheck the voltage test points. If the voltages are not present, replace the
motherboard.
5. If the voltages are present at the CPU board or power supply test points but not
within tolerance, perform the following steps
A. Power off the system unit and unplug the ac power cord from the power
supply. Replace the power supply.
B. If the problem persists, reinstall the original power supply and follow the
information in this step to check for power loading by a board. Power off
the system unit and remove one board other than the CPU board. Power
on the system unit and retest. If necessary, repeat this procedure for a sec-
ond board. If you replace a defective board, configure any switches or
jumpers the same as the original board.
C. If a board does not appear to have caused the problem, power off the sys-
tem unit and unplug the power cord from the power supply. Reinstall the
boards in their slots.
D. Unplug the internal mass storage power distribution cable from one of the
mass storage devices. Power on the system unit and recheck the voltages.
If necessary, repeat this step for each internal mass storage device. Re-
place the mass storage device if the voltages are within specifications.
end of procedure
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: ......