5
2-2. How to Replace a Card (if only one card installed)
The following procedure shows how to replace the CPU1 card with a new one (MFR-41CPU).
IMPORTANT
Do not touch the components on the MFR-41CPU to protect it from electrostatic damage.
(1) Turn off the power supply switches of the
MFR-4100 unit.
(2) Unfasten four fixing screws on the front
panel and detach the front panel.
(3) Detach the cables from CPU1 MFR-LAN
and PC-LAN.
(4) Loosen the fixing screw on the CPU1 card.
(5) Grab the CPU1 card handle and slowly remove
(pull out) the card.
(6) Insert a new CPU card firmly into the slot.
(7) Tighten the fixing screw on the CPU card.
(8) Turn on the power supply switches of the MFR-4100
unit.
(9) Check that CPU1 LED is lit.
(10) Re-connect LAN cables detached in Step (3) into the CPU1 MFR-LAN and PC-LAN
connection ports.
(11) Re-install the front panel.
The card replacement is now complete.
(9)
(4)
CPU1 card
FAN 1
FAN 2
FAN 3
23 2C
SERIAL
422
ALARM
REF IN
FAN 4
FAN 5
CPU1
CPU2
M
F
R
-L
A
N
P
C
-L
A
N
P
C
-L
A
N
M
F
R
-L
A
N
A
C
1
0
0
-2
4
0
V
5
0
/6
0
H
z
IN
A
C
1
0
0
-2
4
0
V
5
0
/6
0
H
z
IN
2
1
INPUT
5
6
7
8
1
9
2
3
4
5
6
7
8
1
9
8
7
6
5
4
3
2
9
8
7
6
5
4
3
2
1
1
2
3
4
5
6
7
8
9
8
7
6
5
4
3
2
1
1
2
3
4
5
6
7
8
9
9
8
7
6
5
4
3
2
1
1
2
3
4
5
6
7
8
9
9
8
7
6
5
4
3
2
1
9
9
9
9
8
8
8
8
7
7
7
7
6
6
6
6
5
5
5
5
4
4
4
4
3
3
3
3
2
2
2
2
1
1
1
1
OUTPUT
INPUT
1
2
3
4
9
9
9
9
8
8
8
8
7
7
7
7
6
6
6
6
5
5
5
5
4
4
4
4
3
3
3
3
2
2
2
2
1
1
1
1
(3)
