IBM 7133 Series, Service Manual

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MAP 2020: 7133 – Power
This MAP helps you to isolate FRUs that are causing a power problem on a 7133.
Attention: Unless the using system needs to be turned off for some other reason, do not
turn off the using system when servicing the 7133 or an SSA link. Power cables and
external SSA cables that connect the 7133 to the using system can be disconnected while
that system is running.
You are here because of one or more of the following:
A fan-and-power-supply assembly has its Fan-and-Power Check light on.
An SRN has sent you here.
Step 1
(from step 21 in “MAP 2010: 7133 – START”)
Does the fan-and-power-supply assembly in either position 2 or position 3 have its
Power light on?
NO Go to step 2.
YES Go to step 3 on page 2-2020-2.
Step 2
(from step 1)
Is power present at the mainline power source?
NO | For Models 010 and 020, go to the using-system Installation and Service Guide
for further isolation.
| For Models 500 and 600, contact the site maintenance engineer or the
electricity supplier.
YES Exchange the three-way power cable for a new one.
| Note: On Models 500 and 600 in some countries, the mainline power plug
contains a fuse. Check the fuse before exchanging the power cable.
Chapter 2. Problem Determination Procedures
2-2020-1