IBM 7133 D40, Руководство по обслуживанию

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9. Refer to Figure 38.
10. Check for continuity between the frame of the 7133 and the ground pin
1
of
each mainline-power connector.
11. Go to step 15.
12. Refer to Figure 39.
13. Check for continuity between the frame of the 7133 and the ground pins 1 and 7
of each mainline-power connector.
14. Go to step 15.
15. If any power supply assembly has no continuity, exchange that power supply
assembly for a new one (see “Power Supply Assemblies” on page 162), then do
the complete grounding check again.
If each power supply assembly has continuity, you might have a problem with the
power cable or with the grounding of the using system.
If you are servicing a 220-volt 7133, go to step 16.
If you are servicing a −48 volt 7133, see the rack, or using-system, Installation and
Service Guide, or equivalent, to isolate the fault, then do the complete grounding
check again.
16. Check the power cable for continuity.
1
Figure 38. Ground Pin (Model D40: 220 V)
Pin 1
Pin 7
Pin 12
Pin 6
Figure 39. Ground Pins (Model D40: −48 V)
Chapter 1. Reference Information
67