Chapter 2. Maintenance Analysis Procedures (Maps); Map 1520: 7012 Power Map - IBM 7012 300 Series Installation And Service Manual

Chapter 2. Maintenance Analysis Procedures (MAPS)

MAP 1520: 7012 Power MAP

Notes:
This procedure is used to locate power problems in the 7012. If a problem is detected, this
procedure helps you to isolate the problem to a failing field replaceable unit (FRU).
Observe the following safety notice during service procedures.
Note: For a translation of this notice, see System Unit Safety Information .
DANGER
An electrical outlet that is not correctly wired could place hazardous voltage
on metal parts of the system or the products that attach to the system. It is
the responsibility of the customer to ensure that the outlet is correctly wired
and grounded to prevent an electrical shock.
Before installing or removing signal cables, ensure that the power cables for the
system unit and all attached devices are unplugged.
When adding or removing any additional devices to or from the system, ensure
that the power cables for those devices are unplugged before the signal cables
are connected. If possible, disconnect all power cables from the existing system
before you add a device.
Use one hand, when possible, to connect or disconnect signal cables to prevent
a possible shock from touching two surfaces with different electrical potentials.
During an electrical storm, do not connect cables for display stations, printers,
telephones, or station protectors for communication lines.
CAUTION:
This product is equipped with a three-wire power cable and plug for the user's
safety. Use this power cable in conjunction with a properly grounded electrical outlet
to avoid electrical shock.
DANGER
To prevent shock hazard, disconnect the power cable from the electrical
outlet before relocating the system.
1. This is not a start of call MAP. Use this Power MAP only if you have been directed
here from a MAP step in the Diagnostic Information For Micro Channel Bus
Systems .
2. All information in this MAP pertaining to 7012 Model 397 also applies to 7030
Model 397.
Maintenance Analysis Procedures (MAPs)
2-1520-1