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Reference Codes
When the customer reports a 9348 unit reference code:
1. Find the reference code in one of the reference code tables on the following
pages.
2. Perform each action described in the Action column, in the sequence shown,
until the problem is corrected.
The FRUs with the highest percent of probable cause should be exchanged first
unless you are instructed to do differently. If exchanging a FRU with the highest
percent of probable cause does not correct the problem, then install the original
item and exchange the failing item with the next highest percent of probable cause.
Continue to exchange and install the FRUs, one at a time, until the problem is cor-
rected.
The connector card, part number 21F7924, should be checked visually for bent pins
or other damage when a read/write card, controller card, or buffer card is listed as a
FRU. The connector card is not always listed as a FRU.
Sometimes a low percent FRU will be tested first because it is easier to isolate it
from the other FRUs.
lnformation on how to run the tests listed in the reference code tables is located in
"Running Diagnostic Tests" on page A-5.
Test Parameters
Some tests in the Action column need a test parameter to be keyed in before
running the test. For example, test 98 needs parameter A to be 6250 or 1600.
If the parameter is not specified in the Action column for a test that needs a param-
eter, use the parameter that appears in the status display (default).
Intermittent Problems
If a problem is intermittent and all the tests in the Action column run correctly, use
the FRU percent to determine the sequence for exchanging FRUs.
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9348 Service lnformation
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