IBM PS703 Service Manual page 215

v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v See Chapter 3, "Parts listing, type 7891," on page 225 to determine which components are CRUs and which
components are FRUs.
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Isolation
Symptom
Procedure Code
FSPSP51 Runtime diagnostics
has detected a
memory bus
correctable error that
is exceeding
threshold. The
memory bus
correctable error
does not threaten the
system operation at
the moment.
However, the system
is operating under
degraded mode.
Action
Replace the CRU called out after this FSPSP call. If the CRU that is called
out is a DIMM CRU, perform the following procedure:
1. Replace both memory DIMMs of the pair on the microprocessor that
contains the failing CRU:
DIMM 1 (Px-C1)
For P1-C1, replace DIMMs 1 and 3; for P2-C1, replace DIMMs
17 and 19.
DIMM 2 (Px-C2)
Replace DIMMs 2 and 4, or DIMMs 18 and 20.
DIMM 3 (Px-C3)
Replace DIMMs 1 and 3, or DIMMs 17 and 19.
DIMM 4 (Px-C4)
Replace DIMMs 2 and 4, or DIMMs 18 and 20.
DIMM 5 (Px-C5)
Replace DIMMs 5 and 7, or DIMMs 21 and 23.
DIMM 6 (Px-C6)
Replace DIMMs 6 and 8, or DIMMs 22 and 24.
DIMM 7 (Px-C7)
Replace DIMMs 5 and 7, or DIMMs 21 and 23.
DIMM 8 (Px-C8)
Replace DIMMs 6 and 8, or DIMMs 22 and 24.
DIMM 9 (Px-C9)
Replace DIMMs 9 and 11, or DIMMs 25 and 27.
DIMM 10 (Px-C10)
Replace DIMMs 10 and 12, or DIMMs 26 and 28.
DIMM 11 (Px-C11)
Replace DIMMs 9 and 11, or DIMMs 25 and 27.
DIMM 12 (Px-C12)
Replace DIMMs 10 and 12, or DIMMs 26 and 28.
DIMM 13 (Px-C13)
Replace DIMMs 13 and 15, or DIMMs 29 and 31.
DIMM 14 (Px-C14)
Replace DIMMs 14 and 16, or DIMMs 30 and 32.
DIMM 15 (Px-C15)
Replace DIMMs 13 and 15, or DIMMs 29 and 31.
DIMM 16 (Px-C16)
Replace DIMMs 14 and 16, or DIMMs 30 and 32.
2. See "Removing a memory module" on page 249 for location
information and the removal procedure.
3. Install new memory DIMMs, as described in "Installing a memory
module" on page 251.
203
Chapter 2. Diagnostics