IBM RS/6000 SP, Maintenance Information

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MAP 0520: Switch Assembly Environment
006
– One or more of the following conditions exist:
Ÿ Voltage out of range: +5 V “shutdownP5”
Ÿ
Voltage out of range: +12 V “shutdownP12”
Ÿ
Voltage out of range:
−
5 V “shutdownN5”
– Have the customer remove the switch assembly from the active configuration and power off the switch
assembly.
– Put the switch into service position. Refer to "Service Position Procedures" in IBM RS/6000 SP: Mainte-
nance Information, Volume 3, Locations and Service Procedures.
– Check cable conditions at switch supervisor card S00-SP-J102 and power card S00-PC-J903. Check
condition of cable wires, especially J903 pin A5 to J102 pin A3, and the appropriate connection (based
on message) shown below:
Voltage Power Card - J903 Switch Supervisor - J102
+5 V S00-PC-P903 pin B2 S00-SP-P102 pin A6
+12 V S00-PC-P903 pin A3 S00-SP-P102 pin A5
−
5 V S00-PC-P903 pin A1 S00-SP-P102 pin A7
– Leave cable disconnected at switch power card.
Does the switch supervisor control cable appear to be okay?
Yes No
007
Problem with switch supervisor control cable (S00-SP-P102).
– Go to Step 019 on page 1-304, Priority 4, to replace cable.
008
– Disconnect S00-PC-P902 at power card.
– Using a digital multimeter, measure resistance between the appropriate pins.
– Compare results with values in this table:
Voltage
Measure From
(positive lead) To GND
(negative lead) Acceptable Range
(in ohms)
+5 V(note) Pin 1(note) Pin 2 (black)(note) 1K - 5M(note)
+12 V Pin 3 Pin 2 (black) 1K - 5M
−
5 V(note) Pin 5(note)
Pin 7 Pin 2 (black)(note)
Pin 2 (black) 2 - 20(note)
2 - 20
Note:
HiPS-LC8 switch assembly has only +5 V (pin 1) and -5 V (pin 5).
Is the measured resistance(s) in the acceptable range?
Yes No
009
– If this is an HiPS-LC8 switch assembly, skip directly to Step 010 on page 1-303
(Step 009 continues)
1-302
RS/6000 SP MAPs