Power-Supply
If the power-on indicator is not on, if the power-supply fan is not running, or the
computer will not power on, do the following.
If the above are correct, check the following voltages (see “20-Pin Main Power
Supply Connection”).
Check/Verify
FRU/Action
1. Verify that the voltage-selector switch is
set for the correct voltage.
Correct the voltage-selector switch
setting.
2. Check the following for proper
installation.
¹
Power Cord
¹
On/Off switch connector
¹
On/Off switch power supply connector
¹
System board power supply
connectors
¹
Microprocessr(s) connection
Reseat
Check the power cord for proper
continuity
Power Cord
Check the power-on switch for continuity
Power-on switch
20-Pin Main Power Supply Connection
See “System Board Layout” on page H-6 for connector location.
Attention
These voltages must be checked with the power supply cables connected to the
system board.
1
10
11
20
Pin
Signal
Function
1
3.3 V
+3.3 V dc
2
3.3 V
+3.3 V dc
3
COM
Ground
4
5 V
+5 V dc
5
COM
Ground
6
5 V
+5 V dc
7
COM
Ground
8
POK
Power Good
9
5VSB
Standby Voltage
10
12 V
+12 V dc
Chapter 3. Service Processor Troubleshooting
3-21
Содержание 3745 Series
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Страница 172: ...c If you have a problem call your support for assistance 6 2 3745 XXA 6 2 3746 9X0 6563 SPIM...
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Страница 183: ...Appendix A Safety Information A 11...
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Страница 243: ...Appendix I Service Processor Part Numbers Copyright IBM Corp 1999 I 1...
Страница 244: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 I 2 3745 XXA I 2 3746 9X0 6563 SPIM...
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Страница 270: ...Part Number 10K8590 Printed in U S A 10K8590 SY27 0393 00...