Troubleshooting guide

MX2820 System Manual
1-6 61186003L1-1D
Figure 1-1 shows the front and rear views for a MX2820 19-inch shelf.
Figure 1-1. MX2820 19-inch Shelf (Front and Rear View)
Figure 1-2 shows the front and rear views for a MX2820 23-inch shelf.
Figure 1-2. MX2820 23-inch Shelf (Front and Rear View)
USE COPPER
CONDUCTORS ONLY
USE COPPER
CONDUCTORS ONLY
-48V , 3.75A
7
DSX-3
OUTIN
6
DSX-3
OUTIN
5
DSX-3
OUTIN
4
DSX-3
OUTIN
3
DSX-3
OUTIN
2
DSX-3
OUTIN
1
DSX-3
OUTIN
R8
R7
R6
R5
P4
P6
N
C
C
N
O
C
N
O
M
I
N
N
C
C
N
O
+
Ð
N
H
C
T
R
S
T
R
S
A
U
X
1
A
U
X
2
A
U
X
3
A
C
O
P
W
R
A
R
E
T
A
P
W
R
B
R
E
T
B
J2
J1
TB1
CLKB
R4
R10
R1
D1
R2R9
R3
D4
D3
D2
7 OUT
(T1/R1)
6 OUT
(T1/R1)
5 OUT
(T1/R1)
4 OUT
(T1/R1)
3 OUT
(T1/R1)
2 OUT
(T1/R1)
1 OUT
(T1/R1)
7 IN
(T1/R1)
6 IN
(T1/R1)
5 IN
(T1/R1)
4 IN
(T1/R1)
3 IN
(T1/R1)
2 IN
(T1/R1)
1 IN
(T1/R1)
C
R
A
F
T
1186003
SCU
ACO
ALM
ACT
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
1A
CLKB
CLK A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
1B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
2A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
2B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
3A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
3B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
4A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
4B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
5A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
5B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
6A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
6B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
7A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
7B
1186011
CLK
1186011
CLK
MX 2820
1186001L1
USE COPPER
CONDUCTORS ONLY
USE COPPER
CONDUCTORS ONLY
-48V , 3.75A
9
DSX-3
OUTIN
8
DSX-3
OUTIN
7
DSX-3
OUTIN
6
DSX-3
OUTIN
5
DSX-3
OUTIN
4
DSX-3
OUTIN
3
DSX-3
OUTIN
2
DSX-3
OUTIN
1
DSX-3
OUTIN
R8
R7
R6
R5
P4
P6
N
C
C
N
O
C
N
O
M
I
N
N
C
C
N
O
+
Ð
N
H
C
T
R
S
T
R
S
A
U
X
1
A
U
X
2
A
U
X
3
A
C
O
P
W
R
A
R
E
T
A
P
W
R
B
R
E
T
B
J2
J1
TB1
CLKB
R4
R10
R1
D1
R2R9
R3
D4
D3
D2
9 OUT
(T1/R1)
8 OUT
(T1/R1)
7 OUT
(T1/R1)
6 OUT
(T1/R1)
5 OUT
(T1/R1)
4 OUT
(T1/R1)
3 OUT
(T1/R1)
2 OUT
(T1/R1)
1 OUT
(T1/R1)
9 IN
(T1/R1)
8 IN
(T1/R1)
7 IN
(T1/R1)
6 IN
(T1/R1)
5 IN
(T1/R1)
4 IN
(T1/R1)
3 IN
(T1/R1)
2 IN
(T1/R1)
1 IN
(T1/R1)
C
R
A
F
T
1186003
SCU
ACO
ALM
ACT
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
1A
CLKB
CLK A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
1B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
2A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
2B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
3A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
3B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
4A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
4B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
5A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
5B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
6A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
6B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
7A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
7B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
8A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
8B
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
9A
1186002
MUX
ALM
ACT
TEST
STAT
TEST
STAT
DS1
DS3
9B
1186011
CLK
1186011
CLK
MX 2820
1186001L1