IBM iSeries 270 Service Manual page 587

Note: When converting from Bus/Board/Card format to Bus-Bus-Bus-Bus/Card-Card/Board-Board
format, the numbers must be converted from Decimal to Hexadecimal.
Go to step 9 (See page 576) for IOA and device address information.
6. Display the FRU details for the problem that you are attempting to fix. The location information in the
field-replacable unit detail is only available for IOPs, IOAs, and devices.
Is the field-replaceable unit an IOP, IOA, or device and is there location information in the Location
field of the display?
No: Continue with the next step.
v
Yes: Use the location information and return to the procedure that sent you here.
v
This ends the procedure.
7. There is no location information in the Location field. Are there Additional Words displayed at the
bottom of the screen?
v No: Go to Hexadecimal Product Activity Log Data in the iSeries Service Functions
book to obtain the address information. Then, return here and continue with the next step.
v Yes: Use the additional words to find the address information:
– If characters 7 and 8 of word two are 60:
- The IOP address is word four in the format "BBBBCcbb".
- The device address is word five in the format "abcd efgh".
– If characters 7 and 8 of word two are 13, 17, 27, or 29:
- The IOP address is word three in the format "BBBBCcbb".
- The device address is word four in the format "abcd efgh".
– If characters 7 and 8 of word two are 62:
- The IOP address may be word seven in the format "BBBBCcbb".
- The device address may be word six in the format "abcd efgh".
Continue with the next step.
8. The BBBBCcbb format is the hexadecimal direct select address of a card location in the system unit.
The format definition is:
BBBB—System Bus
Analyze hardware problems
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