(A)
SPCN
Optical
.-----
(C)
SPCN
Adapter
----.
|
Optical
Cables
|
|
|
|
.---
(B)
SPCN
.---------.
|
|
|
Optical
|
System
|
|
|
|
Adapter
|
Unit
|
V
|
V
|
J15
|
.-.
V
.-.
’----.----’
|
+------------+
|
|
|
+------------+
|
.----’----.
.-------’-+
.-------’-+
.---------.
|
J15
|
|
J16|
|
J15|
|
|
|Frame
J16+-+J15
Frame|
|Frame
J16+-+J15
Frame|
|
1
|
|
2
|
|
3
|
|
4
|
’---------’
’---------’
’---------’
’---------’
^
|
|
’---Failing
Frame
This
ends
the
procedure.
48.
Does
the
SPCN
frame-to-frame
cable
coming
from
the
system
unit
connect
to
J15
on
the
secondary
frame
(where
the
power
on
light
is
off
or
the
frame
control
panel
displays
a
power
reference
code
of
1xxx
xxxx)?
v
Yes
:
Continue
with
the
next
step.
v
No
:
Connect
the
SPCN
frame-to-frame
cable
coming
from
the
system
unit
to
J15
of
the
secondary
frame.
This
ends
the
procedure.
49.
Perform
the
following:
a.
Power
off
the
system.
b.
Disconnect
the
SPCN
frame-to-frame
cable
from
J15
on
the
AC
module
or
SPCN
card
of
the
first
frame
or
unit
that
cannot
become
powered
on.
c.
Connect
the
negative
lead
of
a
multimeter
to
the
system
frame
ground.
d.
Connect
the
positive
lead
of
the
multimeter
to
pin
2
of
the
SPCN
cable.
Note:
Use
an
insulated
probe
or
jumper
when
performing
the
voltage
readings.
e.
Note
the
voltage
reading
on
pin
2.
f.
Move
the
positive
lead
of
the
multimeter
to
pin
3
of
the
SPCN
cable.
g.
Note
the
voltage
reading
on
pin
3.
Is
the
voltage
on
both
pin
2
and
pin
3
from
1.5
V
dc
to
5.5
V
dc?
v
No
:
Continue
with
the
next
step.
v
Yes
:
Exchange
the
following
FRUs,
one
at
a
time.
See
the
topic,
or
the
manual
on
the
V5R1
Supplemental
Manuals
web
site
,
depending
on
the
secondary
frame
you
are
working
on.
–
AC
module
or
SPCN
card
(see
symbolic
FRU
in
the
failing
frame
or
unit.
–
AC
module
or
SPCN
card
(see
symbolic
FRU
or
see
symbolic
FRU
in
the
preceding
frame
in
the
frame
string.
Analyze
hardware
problems
55
