Map 1520: Power - IBM 265 Service Manual

MAP 1520: Power

Notes:
1. This is not a start-of-call MAP. Use this Power MAP only if you have been directed
here from another MAP, an SRN in the RS/6000 Eserver pSeries Diagnostic
Information for Multiple Bus Systems , or an error code.
2. The 9112 Model 265 can accommodate three power supplies installed with separate
power receptacles on the rear of the system.
This procedure is used to locate power problems in system units. If a problem is
detected, this procedure helps you isolate the problem to a failing unit.
Observe the following safety notice during service procedures.
DANGER
An electrical outlet that is not correctly wired could place hazardous voltage
on metal parts of the system or the devices 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 communications lines.
CAUTION:
This product is equipped with a three–wire power cable and plug for the user's
safety. Use this power cable with a properly grounded electrical outlet to avoid
electrical shock.
Chapter 3. Maintenance Analysis Procedures (MAPs)
49