Roland VersaEXPRESS RF-640 Service Notes page 119

Fix the Right Frame and the Panel Cover.
36
When fixing the Panel
Cover, fi x the sensor with
the sensor cable and the
ribbon cable to the Panel
Board.
Perform the SERVO LOCK CHECK.
37
After turning on the Main Power SW, turn on the Sub Power
SW while pressing the left, right and down keys to enter the
Service Mode.
In [MOTOR MENU]>[SERVO LOCK] menu, select [F].
38
Move the Head Carriage left and right by hand and make
sure the value on the LCD changes depending on the head
position.
Press the [ENTER] key to excite the motor.
39
Check and see if the Grit Roller can not be moved easily by
hand and the value on the LCD returns to the certain value.
Panel Cover
ON
SERVICE MENU
MOTOR MENU
MOTOR MENU
SERVO LOCK
SERVO LOCK
F: 140
SERVO LOCK
F: 80
SERVO LOCK
F:* 80
3-45
Right Frame
+
[ ]
[ ]
[ ]
140
80
[ENTER]
80