IBM RS/6000 SP, Maintenance Information

Page: 86 / 388

MAP 0150: 120/160 Thin Node Environment
033 (continued)
Problem may be one of the following:
Base memory card
I/O planar
Node supervisor control cable.
– Replace parts, one at a time, until problem is corrected.
Are you able to correct the problem?
Yes No
034
– Call next level of support.
035
Problem resolved.
– Go to “MAP 0570: End of Call” on page 1-357.
036
– Check memory card and SIMM part numbers in Diagnostic Information for Micro Channel Bus Systems
(SA38-0532) and Adapters, Devices and Cable Information (SA38-0533) to ensure that they are com-
patible with the fastest Type 7012 machines.
– If necessary, call next level of support.
037
Problem with dc voltage for I/O planar.
– Disconnect power cable N00-DP-J204 at daughter power card.
– Using a digital multimeter, measure resistance between pin 1 and pin 5 on cable N00-DP-P204.
Voltage
Measure from
(positive lead) To GND
(negative lead)
Acceptable Range
+2.5 V Pin 1 (black) Pin 5 (black) 4.0 - 100 Ohms
+4 V Pin 1 (red) Pin 5 (black) 4.0 - 100 Ohms
Is the measured resistance in acceptable range?
Yes No
038
– Remove the memory card(s) from processor node, then repeat measurement from Step 037.
Is the measured resistance in acceptable range?
Yes No
039
– Disconnect power cable at I/O planar N00-PL-P3, then measure resistance between pin 1
and pin 5 on N00-PL-P3.
(Step 039 continues)
1-66
RS/6000 SP MAPs