Roland SOLJET Pro III XC-540 Service Notes page 121

Remove the Encoder Scale by removing the Plate fixing
5
the Encoder Scale at its right end and the Spring on its
left end.
Remove the Spring Plate from the Encoder Scale and fix
6
it to the Encoder Scale where there is no black dot
written on it.
Make sure not make scratches or put grease
on the Encoder Scale when fixing it.
Do not touch the surface of the Encoder Scale.
Put the Encoder Scale in between the Encoder Plate and
7
the Guide Rail.
Then, fix the right end with the Plate and hook up the
Spring on the left end.
Make sure that the Encoder Scale its in place.
Do not loosen or tighten the screws fixing the
Encoder Plate.
Move the Head Carriage in a whole width of the machine.
8
Make sure that the Encoder Scale doesn't make contact
with the Encoder Module and also Encoder Scale is
between the slit of the Encoder Module.
Carry out the [4-7 LINEAR ENCODER SETUP].
Spring
Spring Plate
Spring
3-59
Encoder Scale
Plate
Black Dot
Encoder Scale
Plate
Screw