IBM RS/6000 SP Step, SP Switch power MAP, 5. Inner chassis cable continuity, S00-BHJ1 pin 5&9

SP Switch power (MAP 0610)

vIf yes:

a.Have the customer remove the SP Switch from the active configuration and power off the SP Switch.

b.Go to ªStep 0610-010º.

vIf no:

a.Fix any cable connection problems.

b.Return to ªStep 0610-006º on page 1-15.

Step 0610-010

You have an SP type switch that is either tripping the circuit breaker to the Off position or the circuit breaker is on but the Power (green) LED is not lit.

1.Turn off the circuit breaker.

2.Unplug cables connected to J1 and J2 at rear of the SP Switch.

3.Remove the front panel assembly from the inner chassis.

4.Unplug inner chassis cable from the switch power cards S00-PC-P4, S00-PC-P6 and the switch supervisor card S00-SP-P5.

5.Using a digital multimeter, check for inner chassis cable continuity from the switch tailgate and the connectors in Table 1-5:

Table 1-5. Inner chassis cable continuity

From	To
S00-BH_J1 pin 5&9	P6 pin 2
S00-BH-J1 pin 5&9	P4 pin 2
S00-BH-J1 pin 1&6	P3 pin 16
P3 pin 17	p6 pin 1
P3 pin 17	p4 pin 1

6.On the fan assembly, with circuit breaker in the On (`1') position, check for front chassis cable continuity between the connectors in Table 1-6:

Table 1-6. Front chassis cable continuity

From	To
P1 pin 17	P1 pin 16

7.Is there continuity?

v If you have continuity on all cables, go to ªStep 0610-013º on page 1-17.

vIf you do not have continuity on an inner chassis cable, go to ªStep 0610-011º.

vIf you do not have continuity on an front chassis cable, go to ªStep 0610-012º.

Step 0610-011

An inner chassis cable failed the continuity test.

1.Replace inner chassis cable.

2.Return to ªStep 0610-004º on page 1-14 to verify the replacement cable.

Step 0610-012

An front chassis cable failed the continuity test.

1.Ensure that the circuit breaker is in the On (`1') position.

2.Check for continuity between the tabs of the circuit breaker.

3.Is there continuity? v If yes:

1-16RS/6000 SP: SP Switch Service Guide