Roland VersaCAMM VP-540 Service Notes page 132

Perform the SERVO LOCK CHECK.
9
After turning on the main power, turn on the sub power
while pressing the left, right and down keys to enter the
Service Mode.
Check the GRIT ENCODER.
10
Go back to the [MOTOR MENU], and select [G-ENC.
CHECK] and press the [ENTER] key. Make sure the Grit
Encoder functions correctly by confirming the display
shows [G-ENC. CHECK COMPLETED].
In case that [G-ENC. CHECK FAILED] appears, check
the followings.
1. Grit Encoder is fixed correctly.
2. Feed Motor is fixed correctly.
3. There is no scratches or finger prints.
Fix the following covers.
11
Maintenance Cover
Left Side Cover
Left Cover
MENU
SERVICE MENU
SERVICE MENU
MOTOR MENU
MOTOR MENU
G-ENC. CHECK
M-ENC:
G-ENC:
G-ENC. CHECK
LEFT COVER
LEFT SIDE COVER
< Left Side >
3-69
+
MENU
[ ] [ ]
[ENTER]
6654
6653
COMPLETED
G-ENC. CHECK
FAILED
MAINTENANCE COVER