Map 154A: I2C Bus Problem Isolation - IBM pSeries 670 Service Manual

MAP 154A: I2C Bus Problem Isolation

Step 154A-1
Record the error code, location code(s), word 13, and word 16 that sent you to this MAP.
Step 154A-2
Turn off the power.
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 154A-3
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
No Call for support.
Yes Go to "Step 154A-4".
Step 154A-4
Examine the following table and locate the error code that sent you to this MAP to determine your next
step.
Error Code
B1xx 4643
B1xx 4645
B1xx 4648, 406x 0001, 406x 0002, 406x 000A, 406x
000B, 406x 000C, 406x 000D
Step 154A-5
Replace the following books and modules, if present, one at a time:
v First location code item recorded, if any, in "Step 154A-1".
v Second location code item recorded, if any, in "Step 154A-1".
v Primary I/O Book at U1.18-P1-H2 if not recorded in "Step 154A-1".
v Secondary I/O Book at U1.18-P1-H3 if not recorded in "Step 154A-1".
v Third I/O Book at U1.18-P1-H4 if not recorded in "Step 154A-1".
v Fourth I/O Book at U1.18-P1-H1 if not recorded in "Step 1549-1" on page 293.
v System clock card, at U1.18-P1-X5 if not recorded in "Step 154A-1".
Step 154A-6
Turn on the power.
Step 154A-7
Did the system stop with the same error code as recorded in "Step 154A-1"?
No The book or module just replaced was defective. This ends the procedure.
Return the system to its original configuration.
Go to "MAP 0410: Repair Checkout" in the RS/6000 and Eserver pSeries Diagnostic Information
for Multiple Bus Systems.
Yes Go to "Step 154A-8".
Step 154A-8
Have all the books listed in "Step 154A-5" been replaced?
No Go to "Step 154A-2".
Yes Go to "Step 154A-14" on page 302.
Action
Go to "Step 154A-22" on page 303.
Go to "Step 154A-9" on page 302.
Go to "Step 154A-5".
Chapter 3. Maintenance Analysis Procedures
301