IBM RS/6000 SP manual Step, SP Switch environment MAP

SP Switch environment (MAP 0600)

2.Remove the switch supervisor card (refer to ªRemoving the switch supervisor cardº on page 4-4).

3.Using a digital multimeter, measure resistance at the planar connection for the supervisor card, between pins 12A and 12B.

v The resistance should be in a range of 4 to 20 ohms.

4.Is the measured resistance in the acceptable range? v If yes:

a.Replace supervisor card as described in ªReplacing the switch supervisor cardº on page 4-5.

b.Go to ªStep 0600-017º on page 1-10.

vIf no, go to ªStep 0600-021º.

Step 0600-021

With connectors S00-PC-P4, S00-PC-P6 disconnected, the measured resistance between pins 12A and 12B is outside the specified range.

1.Remove power supply card PS1 (refer to ªRemoving the switch power cardsº on page 4-6.

2.Repeat the resistance measurement from ªStep 0600-020º on page 1-10.

3.Is the measured resistance in the acceptable range? v If yes:

a.Replace the power supply card (refer to ªReplacing the switch power cardsº on page 4-7.

b.Go to ªStep 0600-017º on page 1-10.

vIf no, go to ªStep 0600-022º.

Step 0600-022

Connectors S00-PC-P4 and S00-PC-P6 are disconnected and you removed power supply card PS1 but the measured resistance between pins 12A and 12B is still outside the specified range.

1.If this is the first time through this step:

a.Remove power supply card PS2

b.Go to ªStep 0600-020º on page 1-10 and repeat the resistance measurement

2.If you have already been through this step:

a.Replace the switch assembly. Go to ªStep 0600-017º on page 1-10.

Step 0600-023

You arrived at this location from ªStep 0600-018º on page 1-10 where you found a condition state reporting a PSxFail or PSxFuseGood problem.

1.If you have a PSFuseGood problem, go to ªStep 0600-027º on page 1-12.

2.If you have a PS1Fail problem, go to ªStep 0600-025º on page 1-12.

3.If you have a PS2Fail problem, go to ªStep 0600-024º.

Step 0600-024

You have a PS2Fail problem.

1.Replace power supply card PS2.

2.Reinstall the SPS front panel assembly, being careful to align the guide pins on the P1 to the inner chassis cup guide.

3.Replug the power cable (J1) and supervisor cable (J2) to the rear of the assembly.

4.Put the circuit breaker in the On (`1') position.

5.Does the PS2Fail condition still exist?

v If yes, go to ªStep 0600-026º on page 1-12.

v If no, go to ªStep 0600-017º on page 1-10.

Chapter 1. Maintenance Analysis Procedures (MAPs) 1-11