C
C
H
H
A
A
P
P
T
T
E
E
R
R
4
4
O
O
P
P
T
T
I
I
O
O
N
N
S
S
Optional accessories
........................................................................4-1
Lower tray unit (LT-500)
.................................................................4-2
Installing the Lower tray unit...........................................................4-3
Network option (NC-4100h)
.........................................................4-5
Installing the Network board...........................................................4-5
RAM expansion
....................................................................................4-9
Installing additional memory .........................................................4-13
IrDA interface (IR-1000)
.............................................................. 4-17
Optional font package (BS-3000)
.......................................... 4-18
C
C
H
H
A
A
P
P
T
T
E
E
R
R
5
5
R
R
O
O
U
U
T
T
I
I
N
N
E
E
M
M
A
A
I
I
N
N
T
T
E
E
N
N
A
A
N
N
C
C
E
E
Replacing the consumables
.........................................................5-1
Cleaning.......................................................................................5-17
Maintenance messages ...............................................................5-25
