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

SP Switch environment (MAP 0600)

Step 0600-004

Perspectives indicated a shutdown condition and Table 1-2 on page 1-5directed you to this step.

1.One or more of the following conditions exist: v Voltage out of range: +5 V ªshutdownP5º

vVoltage out of range: +12 V ªshutdownP12º

vVoltage out of range: −5 V ªshutdownN5º

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

3.Put the switch into service position. Refer to ªService position proceduresº on page 3-9.

4.Check the following hardware items:

vCable conditions at switch supervisor card S00-SP-J102

vCable conditions at power supply S00-PC-P4 and S00-PC-P6.

vCable conditions of wires, especially the inner chassis cable.

5.Leave the cable disconnected at the switch power card.

6.Does the switch supervisor control cable appear to be okay?

vIf yes, go to ªStep 0600-005º.

vIf the switch supervisor control cable (S00-SP-P102) appears to have a problem, go to ªStep 0600-011º on page 1-7.Refer to Priority 4 and replace the cable.

Step 0600-005

After placing the switch into the service position, you performed some basic inspections and found that the switch supervisor control cable (S00-SP-P102) appears to be okay.

1.Disconnect S00-PC-P4 and S00-PC-P4 at the power supply.

2.Using a digital multimeter, measure resistance between the appropriate pins.

3.Compare results with values in Table 1-3:

Table 1-3. Switch connector resistance values

	Measure from		To GND			Acceptable range
Voltage	(positive lead)		(negative lead)			(in		ohms)
+5 V	Pin 1		Pin 2 (black)			1K - 5M
+12 V	Pin 3		Pin 2 (black)			1K - 5M
−5 V	Pin	5	Pin	2	(black)	2	-	20
	Pin	7	Pin	2	(black)	2	-	20

4. Is the measured resistance in the acceptable range?

vIf yes, go to ªStep 0600-009º on page 1-7.

vIf no, go to ªStep 0600-006º.

Step 0600-006

The resistance value you measured in Table 1-3was not within an acceptable range.

1.Replace the inner chassis cable.

2.Repeat resistance measurement from ªStep 0600-005º.

3.Is the measured resistance in the acceptable range?

vIf yes, go to ªStep 0600-017º on page 1-10 to verify fix.

vIf no, go to ªStep 0600-007º.

Step 0600-007

You disconnected S00-CL-P5 at the switch clock card but the measured resistance was still outside the acceptable range.

1.Replace the front chassis cable.

2.Repeat resistance measurement from ªStep 0600-005º.

1-6RS/6000 SP: SP Switch Service Guide