16.
Is
the
SRC
1xxx
xx2E?
v
No
:
Go
to
v
Yes
:
Continue
with
the
next
step.
17.
Do
SPCN
optical
cables
A
connect
the
failing
unit
B
to
the
preceding
unit
in
the
string?
v
No
:
Go
to
step
19
(See
page
.
v
Yes
:
Continue
with
the
next
step.
.---------.
(A)
SPCN
|
System
|
Optical
Cables
-.
.-----
SPCN
|
Unit
|
|
V
Optical
Adapter
|
J15
|
.-.
V
.-.
’----.----’
|
+------------+
|
|
|
+------------+
|
.----’----.
.-------’-+
.-------’-+
.---------.
|
J15
|
|Sec
J16|
|Sec
J15|
|
Sec
|
|Sec
Unit
+-+UNIT
J15|
|Unit
J16+-+J15
Unit
|
|
1
|
|
2
|
|
3
|
|
4
|
’---------’
’---------’
’---------’
’---------’
^
|
’----
(B)
Failing
Unit
18.
Remove
the
SPCN
optical
adapter
A
from
the
preceding
frame
in
the
string
that
cannot
become
powered
on.
See
for
the
system.
.---------.
.---
(A)
SPCN
Optical
Adapter
|
System
|
|
|
Unit
|
V
|
J15
|
.-.
.-.
’----.----’
|
+------------+
|
322
|
+------------+
|
.----’----.
.-------’-+
.-------’-+
.---------.
|
J15
|
|Sec
J16|
|Sec
J15|
|
Sec
|
|Sec
Unit
+-+Unit
J15|
|Unit
J16+-+J15
Unit
|
|
1
|
|
2
|
|
3
|
|
4
|
’---------’
’---------’
’---------’
’---------’
^
|
’--
Failing
Unit
19.
Perform
the
following:
a.
Connect
the
negative
lead
of
a
multimeter
to
the
system
frame
ground.
b.
Connect
the
positive
lead
of
a
multimeter
to
pin
2
of
J16
in
the
unit
from
which
you
removed
the
SPCN
optical
adapter
in
the
previous
step
of
this
procedure.
Notes
:
v
If
you
are
working
on
a
system
unit,
the
cable
may
be
connected
to
either
J15
or
J16.
v
Use
an
insulated
probe
or
jumper
when
performing
the
voltage
readings.
20.
Note
the
voltage
reading
on
pin
2.
21.
Move
the
positive
lead
of
the
multimeter
to
pin
3
of
J16
on
the
AC
module
or
SPCN
card.
22.
Note
the
voltage
reading
on
pin
3.
Figure
7.
J16
on
AC
module
Is
the
voltage
on
both
pin
2
and
pin
3
from
1.5
V
dc
to
5.5
V
dc?
v
No
:
Exchange
SPCN
card
(see
symbolic
FRU
in
the
unit
from
which
you
removed
the
SPCN
optical
adapter
(see
the
for
the
secondary
unit
you
are
working
on.
This
ends
the
procedure.
v
Yes
:
Continue
with
the
next
step.
23.
Exchange
the
following
FRUs,
one
at
a
time
(see
the
Analyze
hardware
problems
59
