Alcatel-Lucent 7750 SR-a4, Installation Manual, Page: 201 / 232

Appendix C: Field-Replaceable Units
7750 SR-a4 and SR-a8 Installation Guide 201
Figure 73: Removing an IOM-a
Required tools:
• #2 Phillips or flat blade screwdriver
To remove an IOM-a:
Step 1. Use a screwdriver to loosen the IOM-a captive screws (Key 3 in Figure 73 ).
Step 2. Grip both ejector levers and simultaneously pull the ejector levers outward to
unlock the IOM-a and to disengage the backplane connections (Key 4 in
Figure 73 )
Step 3. Slide the IOM-a out of the slot and place it on a flat antistatic work surface. Do not
touch the printed circuit board or connector pins.
7750
S R-a4 Fan Tray
Pwr
S tat
S
lot Layout
1/1 XP
1/2
1/3
1/4
1
CPM A
CPM B
7750 SR-a4
S ervice Router
Pwr
Stat
Pwr
7
7
5
0
MD
A-a
X
P
1
-1
0
0
G
E
-C
F
P
Stat
Lnk
Pwr
7
7
5
0
M
DA
-a
20
-1
G
B-
TX
Stat
Lnk
1
Act
2
Lnk
3
Act
4 Lnk
5
Act
6
Lnk
7 Act
8
Lnk
9
Act
10 Lnk
11
Act
12 Lnk
13 Act
14
Lnk
15
Act
16 Lnk
17
Act
18
Lnk
19 Act
20
Sy
nc
E1
/5
88
Alarms
1PPS
ACO
LT
Critical
Lnk DTE
Pwr
7
7
5
0
CP
M-
a
Stat
Console M
gmt
O
E
S
B
IT
S
Compact Flash
DCE Act Lnk
Act
Major
Minor
Sy
n
cE1
/5
88
Alarms
1PPS
ACO
LT
Critical
Lnk DTE
Pwr
7
7
5
0
C
P
M-a
Stat
Console M
gmt
O
E
S
B
IT
S
Compact Flash
DCE Act Lnk
Act
Major
Minor
Pwr
Stat
77
50
M
D
A
-a
XP
10
-1
0G
B-
S
FP
+
10
Lnk
Act
9
Lnk
Act
8
Lnk
Act
7
Lnk
Act
6
Lnk
Act
5
Lnk
Act
4
Lnk
Act
3
Lnk
Act
2
Lnk
Act
1
Lnk
Act
Pwr
7
7
5
0
M
DA
-a
44
-1
G
B-
CS
FP
/S
FP
Stat
Lnk/Act
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
25 26 27 28
29 30 31 32
33 34 35 36
37 38 39 40
41 42 43 44
17 18 19 20
21 22 23 24
Pwr
7750
S
R-
a
Stat
Air
F
ilt
er
A
c
c
es
s
7
7
50
S
R
-a
4
1
2
3
4
3
4
24592
Table 101: Removing an IOM-a Features
Key Description
1 IOM-a positioned in the chassis slot guides
2 Threaded receptacle
3 IOM-a captive screws (one on each side of the IOM-a)
4 Ejector lever (one on each side of the IOM-a) in open position