Yes No
↓ Using the information from step 12, find the table for the indicated
disk unit type in “Chapter 2. Unit Reference Codes” on page 59.
Perform problem analysis for the disk unit reference code.
This ends the procedure.
15. Find the table for the indicated disk unit type in “Chapter 2. Unit Reference
Codes” on page 59.
Find unit reference code (URC) 3002 in the table and exchange the FRUs for
that URC, one at a time.
Note: Do not perform any other PIPs that are associated with URC 3002.
This ends the procedure.
16. Are the 2 rightmost characters of word 2 on the Problem Summary Form
equal to 62?
Yes No
↓ Use the information in characters 9-16 of the bottom 16 character line
of function 13 (word 9) and go to “Chapter 2. Unit Reference Codes”
on page 59. Use this information instead of the information in word 1
for the reference code.
This ends the procedure.
17. Are characters 9-16 of the top 16 character line of function 12 (word 3) equal
to 00010004?
Yes No
↓ Go to step 21 of this procedure.
18. Are characters 13-16 of the bottom 16 character line of function 12 (4
rightmost characters of word 5) equal to 0000?
No Yes
↓ Go to step 22 of this procedure.
19. Disk information available in this step is:
v Characters 13-16 of the bottom 16 character line of function 12 (4 rightmost
characters of word 5) contain the disk unit reference code.
v Characters 1-8 of the top 16 character line of function 13 (word 6) contains
the disk unit address.
v Characters 9-16 of the top 16 character line of function 13 (word 7) contain
the IOP direct select address.
v Characters 1-8 of the bottom 16 character line of function 13 (word 8)
contains the disk unit type, level and model number.
Are characters 1-4 of the bottom 16 character line of function 13 (4 leftmost
characters of word 8) equal to 9337?
No Yes
↓ Go to step 24 of this procedure.
20. Find the table for the disk unit type (characters 1-4 of the bottom 16 character
line of function 13 - 4 leftmost characters of word 8) in “Chapter 2. Unit
Reference Codes” on page 59, and use characters 13-16 of the bottom 16
character line of function 12 (4 rightmost characters of word 5) as the unit
reference code.
LIC PIPs
Chapter 3. Problem Isolation Procedures (PIPs), Failing Items, and Symbolic FRU Isolation 371
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