Roland VersaCamm VS-640 Service Notes page 120

Move the Head Carriage by hand to the lock position.
26
Fix the Grit Encoder.
27
The both sides of the Grit Encoder is the same.
When fixing the Grit Encoder, make sure not to
scratch or leave any fi ngerprints on it.
Fix the Grit Encoder Stopper with the three screws while
28
holding the Shaft
Fix the Grit Encoder Board together with the stay so that the
29
Grit Encoder is in between the gap of sensor.
Adjust the position
of the sensor so that
the clearance with
the Grit Encoder is
around 1mm.
Grit Encoder Board
1mm
3-47
Grit Encoder
Grit Encoder Stopper