Map 1522: Ac Power Distribution Bus - Power Map; Purpose Of This Map; Safety Notices - IBM T00 Service Manual

MAP 1522: AC Power Distribution Bus - Power MAP

Purpose of This MAP

This procedure is used to locate power problems in the power distribution bus. If a problem is detected,
this procedure will help you isolate the failing field replaceable unit (FRU).
If the rack contains more than one power distribution bus, use this MAP to test the power distribution bus
that is connected to the failing drawer. If you cannot determine which power distribution bus is connected
to the failing drawer, use this MAP to test the first power distribution bus, and then test the other power
distribution bus until the problem is determined.

Safety Notices

Observe the following safety notices 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.
D05
Step 1522-1
Is uninterruptible power source installed?
NO Go to "Step 1522-4" on page 22.
YES Go to "Step 1522-2" on page 22.
Chapter 2. Maintenance Analysis Procedures
21