Roland SOLJET Pro III XC-540 Service Notes page 198

Loosen the two fixing screws located on the right end of
7
the belt.
Loosen the screws about 3 rounds for the
bottom of the screw head not to contact
with the Stay.
Press [ENTER] key to restart AGING.
8
Adjust the belt position turning the Adjustment Screw
9
as follows.
The work space is narrow. Be cautious and
try not to touch the driving pulley and belt.
Also, there are many mechanical parts
around it. You need to work carefully with
your tool not to touch them.
Belt leans to the front side of the machine
-Turn the screw carefully in CCW (loosening).
STAY
SCREW
STAY
AGING
SCAN
Touching the frange on the FRONT side of machine
4-67
FIXING SCREW
[ ]
ADJUSTMENT SCREW