Roland VersaEXPRESS RF-640 Service Notes page 150

Check the GRIT ENCODER.
13
Go back to [MOTOR MENU], and select [G-ENC. CHECK]
and press the [ENTER] key. Make sure the Grit Encoder
functions correctly by confi rming the display shows [G-ENC.
CHECK COMPLETED].
In case that [G-ENC. CHECK FAILED] appears, check the
followings.
1. Grit Encoder is fi xed correctly.
2. Feed Motor is fi xed correctly.
3. There is no scratches or fi nger prints.
Fix the following covers.
14
Right Cover
Right Top Cover
Chassis Cover
Panel Cover
Right Under Cover
Right Frame
SERVICE MENU
MOTOR MENU
MOTOR MENU
G-ENC. CHECK
M-ENC:
G-ENC:
G-ENC. CHECK
Right Under Cover
Panel Cover
3-76
[ ] [
]
[ENTER]
6654
6653
COMPLETED
G-ENC. CHECK
FAILED
Right Top Cover
Chassis Cover
Right Frame