IBM 7133 D40, Руководство по обслуживанию

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11. Refer to Figure 42.
12. Check for continuity between the frame of the 7133 and the ground pin
1
of
each mainline power connector at the top of the 7133.
13. If both mainline power connectors have continuity, go to step 14.
If one or both mainline power connectors do not have continuity, go to step 16.
14. Check each power cable, for continuity.
15. Exchange the failing power cable for a new one, then do the complete grounding
check again.
16. Unplug the short cables (
3
and
4
in Figure 40 on page 69), and check for
continuity between the frame of the 7133 and the ground pin of the power
connector on each power supply assembly (see Figure 19 on page 33).
17. If either power supply assembly does not have 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 both power supply assemblies have continuity, the power switch and cable
assembly is failing. Exchange the power switch and cable assembly for a new one
(see “Power Switch and Cable Assembly (Model T40)” on page 190), then do the
complete grounding check again.
1
Figure 42. Ground Pin (Model T40)
Chapter 1. Reference Information
71