Alcatel-Lucent 7750 SR-a8 - Figure 61 Removing a -48 VDC PSU (7750 SR-A8); Table 90 -48 VDC PSU Removal Features

Appendix C: Field-Replaceable Units
7750 SR-a4 and SR-a8 Installation Guide 179
Figure 61: Removing a –48 VDC PSU (7750 SR-a8)
To remove a –48 VDC PSU module:
Step 1. Ensure external power has been disconnected or turned off at the branch circuit
device. The status LED on the faceplate (Key 1 in Figure 60 or Figure 61) of the
–48 VDC PSU module must be unlit.
See 7750 SR-a –48 VDC PSU LED and Connectors for more information.
Step 2. Remove the protective cover from the terminal block (Key 4 in Figure 62).
Table 90: –48 VDC PSU Removal Features
Key Description
1 LED
2 PSU handle
3 Spring-loaded latch lock
4 Direction of movement
7
75
0
S
R
-
a
4
F
a
n
Tra
y
P
wr
S
t
a
t
Sl
o
t
L
ayou
t
1
/
1
XP
1
/
2
1
/
3
1
/
4
2
/
1
XP
1
2
/
2
XP
2
/
3
2
/
4
C
PM
A
2
CPM
B
7
7
50
S
R-
a
8
Ser
vi
ce Router
Pwr
St
a
t
P
w
r
Stat
7750
M
DA-aXP
1
0
-1
0
G
B
-S
F
P
+
10
L
n
kAc
t
9
L
n
kA
c
t
8
L
n
kA
c
t
7
Lnk
A
c
t
6
LnkAc
t
5
L
n
k
A
c
t
4
L
n
k
Act
3
L
n
k
A
c
t
2
L
n
k
Act
1
L
n
kAc
t
Pwr
7750
M
DA
-
aXP
6
-
1
0
G
B-
S
FP
+
1
-
4
0
G
B-
Q
S
FP
+
Stat
6
L
n
k
Act
7
L
n
kAct
5
L
n
k
A
c
t
4
L
n
k
Act
3
L
n
kA
c
t
2
L
n
k
A
c
t
1
L
n
kAc
t
Pwr
7
7
5
0
M
D
A
-
a
4
-
1
0
G
B-
S
FP
+
Stat
3
L
n
k
A
c
t
4
L
n
kA
c
t
1
LnkAc
t
2
L
n
kAct
P
w
r
7750 MD
A-a
4
4
-1
G
B
-
C
S
F
P
/
S
F
P
Stat
Lnk
/A
ct
1
2
3
4
5
6
7
8
9
1
0
11
12
13
1
4
1
5
16
2
5
2
6
2
7
2
8
29
3
0
3
1
32
3
3
3
4
3
5
3
6
37
38
39
4
0
41
4
2
4
3
4
4
1
7
1
8
1
9
2
0
21
2
2
2
3
2
4
Pwr
7750
M
D
A
-a
2
0-1
G
B
-TX
Stat
Lnk
1
A
ct
2
Lnk
3
A
ct
4
Lnk
5
A
c
t
6
Lnk
7
Ac
t
8
Lnk
9
A
c
t
1
0
L
nk
1
1
A
ct
12
Lnk
1
3
A
c
t
1
4
Lnk
15
Ac
t
1
6
Lnk
1
7
A
ct
1
8
Lnk
1
9
A
ct
2
0
P
wr
7750 MD
A-a
1
2
-1
G
B
-S
F
P
2
-1
0
G
B
-S
F
P
+
S
t
at
L
n
k
/
A
ct
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
Ln
k
A
c
t
1
3
1
4
Ln
k
Act
P
wr
7
7
5
0
M
D
A-
a
4
-
1
0
G
B-
S
FP
+
S
t
at
3
L
n
k
A
c
t
4
Ln
k
Ac
t
1
Ln
k
Ac
t
2
L
n
k
Act
P
w
r
7
7
5
0
SR-a
S
t
a
t
Sy
n
c
E/
1
5
8
8
A
larm
s
1
PP
S
A
CO
/
L
T
Cr
i
t
ic
a
l
Lnk
DTE
P
w
r
7
7
5
0
CP
M-a
S
t
a
t
Co
n
so
l
e
Mgmt O
ES
B
I
T
S
C
om
pact
Fl
ash
D
CE
Ac
t
Lnk A
c
t
M
a
j
or
M
i
nor
S
y
n
c
E/1
5
8
8
A
lar
m
s
1
P
P
S
A
CO/
LT
C
r
i
t
ic
a
l
Lnk
DTE
P
w
r
7
7
5
0
C
P
M-a
St
a
t
Co
n
so
l
e
M
gmt
O
E
S
B
I
TS
C
om
pact
Fl
ash
D
CE
A
c
t
Lnk A
c
t
Ma
j
or Mi
nor
Pwr
7
7
5
0
M
D
A
-
a
X
P
1
-1
0
0
G
B-CF
P
S
t
a
t
Lnk
A
ir
F
ilt
er
A
c
c
es
s
77
50
SR
-a8
2
4
3
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1