Alcatel-Lucent 7750 SR-a4, Руководство по установке, Страница: 187 / 232

Appendix C: Field-Replaceable Units
7750 SR-a4 and SR-a8 Installation Guide 187
Step 4. When the fans stop spinning, pull the fan tray completely out of the slot.
Replacing a Fan Tray
The following procedure assumes that you have removed the fan tray, as described in
Removing a Fan Tray .
Figure 67 shows how to replace the fan tray in the 7750 SR-a4 chassis. Table 95 describes
the features. The same method applies to the fan tray in the 7750 SR-a8 chassis.
Figure 67: Replacing the Fan Tray (7750 SR-a4)
Required tools:
Danger: Do not put your fingers or any tool in the fan tray if the fans are still spinning. Wait
until the fans stop spinning (about 2 s) before completely removing the fan tray from its slot.
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
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
Pwr
Stat
Pwr
7
7
5
0
MD
A
-a
X
P
1
-1
0
0
G
B
-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
n
cE/1
58
8
Alarms
1PPS
ACO/LT
Critical
Lnk DTE
Pwr
7
7
5
0
C
P
M
-a
Stat
Console M
gmt
O
ES
B
ITS
Compact Flash
DCE Act Lnk
Act
Major
Minor
Sy
n
cE/1
58
8
Alarms
1PPS
ACO/LT
Critical
Lnk DTE
Pwr
7
7
5
0
C
P
M
-a
Stat
Console M
gmt
O
E
S
B
ITS
Compact Flash
DCE Act Lnk
Act
Major
Minor
Pwr
7750
SR
-a
Stat
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
F
P
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
A
ir
F
ilt
er
Ac
c
es
s
7
75
0
S
R
-a4
245 8 6
Pwr
7
7
5
0
C
P
M
-a
Stat
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
2
1
2
Table 95: Fan Tray Replacement Features
Key Description
1 Chassis slot guide for fan tray
2 Captive screws