IBM 7133 D40, Service Manual

Page: 87 / 306

Grounding Check (Model T40)
1. Refer to Figure 40.
2. At the back of the 7133, ensure that the short cables
3
and
4
are plugged into
the power supply assemblies, and that a power cable is plugged into each of the
power sockets
1
and
2
.
3. Ensure that the other ends of the power cables are not plugged into electrical
power outlets. Unplug the cables if necessary.
4. Attention: Some electrical circuits could be damaged if the external SSA cables or
power control cables are present at the 7133 while the grounding check is being
done.
Ensure that no external SSA cables are present at the eight connectors
5
.
5. If the 7133 has a Remote Power On Control feature, go to step 6 on page 70.
Otherwise, go to step 8 on page 70.
5
5
1
2
3
4
6
Figure 40. Power Cables and SSA Sockets (Model T40)
Chapter 1. Reference Information
69