IBM RS/6000 SP, Maintenance Information

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MAP 0560: Block Multiplexer Channel Adapter Feature (BMCA)
003 (continued)
Did the card and card wrap diagnostics complete successfully?
Yes No
004
– Call next level of support.
005
Problem resolved. Restore node to channel.
– Remove the card wrap plug P/N 71F1184 from the adapter connector.
– Install cable on the new BMCA card connector.
– Restore the Select-out Bypass Switch to the Select (“S”) position.
– Inform the Customer that the channel resource is available.
– Go to “MAP 0570: End of Call” on page 1-357.
006
Potential cable problem exists. Restore node to channel.
– Remove the card wrap plug P/N 71F1184 from the adapter connector.
– Install cable back on the BMCA card connector.
– Restore the Select-out Bypass Switch to the Select (“S”) position.
– Continue at Step 007.
007
Potential cable problem exists. Channel interface must be opened.
– Ensure that customer has no application on the failing channel, and the parallel channel on the
mainframe is varied off-line.
– Trace and note the cabling connections of the BMCA cabling from the cable entering the frame (P/N
54G3361) to each succeeding node in the daisy chain until the terminator is reached. Make special note
of which processor node is the “first” on the chain; it should be the one with cable P/N 54G3361
(Y-cable with one nine-foot leg) attached.
– Verify that the cable at each adaptor has the Select-out Bypass Switch (labeled S/B) in the Select (“S”)
position.
– Check for obvious problems in the cabling chain, such as loose cable connections or missing terminator.
Were all the BMCA interface cables and terminators properly connected?
Yes No
008
– Fix the obvious problem.
Does this correct the customer reported problem?
Yes No
009
– Go to Step 011 on page 1-355 to test cabling.
010
Problem resolved.
– Inform the Customer that the channel resource is available.
(Step 010 continues)
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RS/6000 SP MAPs