1.
Locate
the
Extended
Reference
Code
in
SRC
data
word
3.
This
is
the
first
half
of
the
second
data
word
in
control
panel
function
12:
12
xxxxxxxxEEEExxxx
xxxxxxxxxxxxxxxx
2.
For
EEEE
values
in
the
table
below,
locate
the
Additional
Reference
Code
information
in
SRC
data
word
6
(AAAAAAAA).
This
is
the
first
word
in
the
control
panel
function
13.
If
word
7
is
non-zero,
it
is
the
DSA
of
the
IOP
being
used
when
the
error
occurred
(IIIIIIII).
If
word
8
is
non-zero,
it
is
the
device
unit
address
of
the
load
source
device
being
used
when
the
error
occurred
(DDDDDDDD).
If
word
9
is
non-zero,
it
is
the
ID
of
the
loadable
code
unit
that
was
being
retrieved
from
the
load
source
when
the
error
occurred
(LLLLLLLL):
13
AAAAAAAAIIIIIIII
DDDDDDDDLLLLLLLL
Use
the
following
table
to
determine
the
recommended
service
action:
Value
for
EEEE
Recommended
service
action:
2107
No
IOP
was
found
on
bus
1.
If
word
7
of
function
13
contains
a
valid
DSA,
it
means
that
the
IOP
at
that
address
is
no
longer
responding
to
commands.
Use
symbolic
FRU
to
fix
the
problem.
2108
A
command
to
the
IOP
at
DSA
IIIIIIII
timed
out.
It
is
not
known
whether
the
timeout
was
due
to
a
problem
with
the
IOP,
with
the
storage
IOA,
with
the
load
source
device
unit,
or
with
the
device
interface.
Use
symbolic
FRU
to
fix
the
problem,
but
do
not
replace
the
HSL
I/O
bridge
card.
2109,
2304
Load
source
interface
error.
The
service
processor
encountered
a
problem
while
trying
to
communicate
with
the
IOP
at
DSA
IIIIIIII.
The
problem
may
be
caused
by
another
device
on
bus
1.
Isolate
a
problem
on
that
device
interface.
Use
symbolic
FRU
to
fix
the
problem,
but
do
not
replace
the
HSL
I/O
bridge
card.
210A
Load
source
interface
error.
The
service
processor
encountered
a
PCI
bus
error
while
attempting
a
transfer
of
data
to
mainstore.
Check
the
FRUs
in
the
path
to
the
mainstore.
Use
symbolic
FRU
to
fix
the
problem,
going
directly
to
the
step
for
the
system
model
you
are
working
on.
This
ends
the
procedure
System
power
control
network
(SPCN)
PIPs
For
use
by
authorized
service
providers.
This
section
contains
the
procedures
necessary
to
isolate
a
failure
in
the
system
power
control
network
(SPCN).
The
C
in
the
SRC
(1xxC
xxxx)
indicates
the
problem
is
on
the
processor
side.
Any
value
other
than
C
indicates
the
problem
is
not
on
the
processor
side.
The
following
safety
notices
apply
throughout
this
section.
Analyze
hardware
problems
221
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