Alcatel-Lucent 7750 SR-a8 - Figure 63 Replacing a -48 VDC PSU (7750 SR-A4); Replacing a -48 VDC PSU

Appendix C: Field-Replaceable Units
7750 SR-a4 and SR-a8 Installation Guide 181
Replacing a –48 VDC PSU
The following steps assume that you have removed the DC PSU from the slot, as described
in Removing a –48 VDC PSU.
Figure 63 and Figure 64 show how to replace a –48 VDC PSU in the 7750 SR-a chassis.
Table 92 describes the features.
Figure 63: Replacing a –48 VDC PSU (7750 SR-a4)
7750 SR
-a4 Fan T
r
ay
P
w
r
S
t
at
S
l
o
t
L
ayo
u
t
1
/
1
X
P
1
/
2
1
/
3
1
/
4
1
CP
M
A
CP
M
B
7
7
5
0
SR-a
4
S
ervice
Ro
u
te
r
P
w
r
S
t
a
t
P
wr
7
7
5
0
MD
A-a
X
P
1
-10
0
GB
-
C
F
P
S
t
a
t
Lnk
P
w
r
7
7
5
0
MDA
-
a
20-
1
G
B-TX
S
t
at
L
n
k
1
A
ct
2
L
nk
3
Act
4
L
n
k
5
A
c
t
6
L
nk
7
A
ct
8
L
n
k
9
A
ct
10
L
nk
11
Act
1
2
L
n
k
1
3
A
c
t
1
4
L
n
k
1
5
A
c
t
1
6
L
n
k
1
7
A
c
t
1
8
L
n
k
1
9
A
c
t
2
0
Sy
nc
E/
1
5
8
8
A
larm
s
1
P
P
S
A
CO/
L
T
Cr
i
t
i
c
a
l
Lnk
DTE
P
w
r
7
7
5
0
CP
M-a
S
t
at
Co
n
s
o
l
e
Mgmt O
ES
B
I
T
S
C
om
pact
Fl
ash
DCE
Ac
t
Lnk
Ac
t
Ma
j
or
Minor
Sy
n
c
E/
1
5
8
8
A
l
ar
m
s
1
P
P
S
A
C
O
/
L
T
Cr
i
t
i
c
a
l
Ln
k
DTE
P
w
r
7
7
5
0
CP
M-a
S
t
a
t
C
o
n
so
l
e
M
gmt
O
E
S
B
I
T
S
C
om
pact
Fl
ash
DCE
A
c
t
Ln
k
Ac
t
Ma
j
or M
i
nor
P
w
r
7750
SR-a
S
t
at
Pwr
S
t
a
t
7
7
5
0
MD
A-
a
XP
1
0
-
1
0
G
B-
S
FP
+
10
Lnk
Ac
t
9
Lnk
A
c
t
8
Lnk
A
c
t
7
Ln
k
A
c
t
6
Lnk
Ac
t
5
Lnk Ac
t
4
Lnk
Ac
t
3
Lnk Ac
t
2
Lnk
A
c
t
1
Lnk
A
c
t
P
w
r
7
7
5
0
MDA
-
a
4
4
-
1
G
B-
CS
FP
/
S
FP
S
t
a
t
L
n
k
/
A
c
t
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
2
5
2
6
2
7
2
8
2
9
3
0
3
1
3
2
3
3
3
4
3
5
3
6
3
7
3
8
3
9
4
0
4
1
4
2
4
3
4
4
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
A
ir
F
ilt
er
A
c
c
e
s
s
7
7
5
0
S
R
-a
4
2
4
3
1
24555