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2. MAIN UNIT REPLACEMENT
2.1 REPLACING THE CPU PC BOARD
1) Disconnect all connectors from the CPU PC board.
2) Remove the three SMW-3x6 screws (small washer type) and four SMW-3x6.
3) Remove the CPU PC board from the driver PC board.
SMW-3x6 Screw
(Small Washer Type)
4) Replace the CPU PC board with a new one, and then reassemble in the reverse order of removal.
Refer to the following DIP SW function table and set the serial interface specifications.
DIP SW
This DIP switch is provided on the CPU PC board. Even after installing the CPU PC board, it is
accessible from the rear of the printer by removing the DIP SW cover.
N
. o
O
/ N
O
F
1
1
O
F
F
O
O
N
O
O
F
F
2
O
N
O
F
F
3
O
N
O
F
F
4
O
N
O
F
F
5
O
N
O
F
F
6
O
N
7
7
O
F
F
O
O
N
O
O
F
F
8
O
N
NOTE:
The shaded settings are the factory default settings. "OFF" means "OPEN".
SMW-3x6
Screw
DIP SW
SMW-3x6
CPU PC Board
Screw
F
2
F
F
2
4
0
0
B
P
S
F
F
4
8
0
0
B
P
S
O
N
9
6
0
0
B
P
S
O
N
1
9
2
0
0
B
P
S
1
b
t i
2
b
s t i
7
b
s t i
8
i b
s t
W
i
h t
o
t u
W
i
h t
E
V
E
N
O
D
D
8
X
O
N
X /
O
F
F
(
N
o
X
O
N
F
F
(
N
o
X
O
F
R
E
A
D
Y
B /
U
S
Y
(
D
T
) A
F
F
(
N
o
X
O
N
s i
o
u
p t
t u
t a
(
N
o
X
O
F
F
s i
o
u
p t
t u
t a
X
O
N
X /
O
F
F
+
R
E
A
D
Y
B /
O
N
X (
O
N
s i
o
u
p t
t u
t a
h t
X (
O
F
F
s i
o
u
p t
t u
t a
h t
X
O
N
X /
O
F
F
X (
O
N
s i
o
O
N
X (
O
F
F
s i
F
u
n
t c
o i
s i
o
u
p t
t u
t a
h t
e
p
o
w
r e
o
n
i t
F
s i
o
u
p t
t u
t a
h t
e
p
o
w
r e
o
f f
h t
e
p
o
w
r e
o
n
i t
m
e
) .
h t
e
p
o
w
r e
o
f f
i t
m
e
) .
U
S
Y
e
p
o
w
r e
o
n
i t
m
e
) .
e
p
o
w
r e
o
f f
i t
m
e
) .
u
p t
t u
t a
h t
e
p
o
w
r e
o
n
i t
m
e
) .
o
u
p t
t u
t a
h t
e
p
o
w
r e
o
f f
i t
m
e
2-2
2.1 REPLACING THE CPU PC BOARD
n
T
a r
n
s
m
i
s s
o i
n
s
p
e
e
d
S
o t
p
b
t i
e l
n
g
h t
D
a
a t
e l
n
g
h t
P
r a
y t i
c
h
e
k c
P
r a
y t i
c
h
e
k c
(
f e
e f
c
v i t
S
W
#
5
s i
s
t e
o t
O
N
) .
m
e
) .
i t
m
e
) .
D
a
a t
p
o r
o t
c
l o
) .
EO18-33002A
Fig. 2-2
e
w
h
e
n
D
P I
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