IBM T00 Service Manual page 49

7. Using a multimeter, verify that no voltage exists between the -48 V dc bus bars and the -48 V dc
return bus bars, A and B sides.
8. Record the locations of all cables or wires connected to the three connector pins on the circuit
breaker that is being removed. Disconnect the wires from the three connector pins and the -48 V dc
power connector.
9. Disconnect the wire that is attached to the bottom of the circuit breaker.
10. Disconnect the mounting nut that attaches the rear of the circuit breaker to the dc power bus bar.
1 A -48 V dc (-) Bus Bar
2 A -48 V dc (-) Power Cable
3 A Return (+) Bus Bar
4 10 mm hole, 25.4 mm Spacing
5 A Return (+) Power Cable
6 B Return (+) Power Cable
7 B -48 V dc (-) Power Cable
14
13
12
1
6
7
8
9
10
11
8 Mounting Nut
9 Three Connector Pins
10 -48 V dc (-) Power Connector
11 Connector Nut
12 B Return (+) Bus Bar
13 B -48 V dc (-) Bus Bar
14 Front of Power Distribution Panel
Chapter 3. Removal and Replacement
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