Brother GTX pro Instruction Manual page 141

(6) Use the platen fixing lever to secure the platen temporarily.
The number of collars and the position of screw hole for the platen bearing differ by the height of the platen
adjusted.
<TIPS>

If you are setting the platen's height to the lowest position, remove all the collars and fix the platen bearing at
its highest screw hole temporarily.

If you are setting the platen's height to the middle position, attach one collar and fix the platen bearing at its
middle screw hole temporarily.

If you are setting the platen's height to the highest position, attach two collars and fix the platen bearing at its
lowest screw hole temporarily.
Platen bearing
(7) Tighten the knob to secure the platen bearing in place.
<TIPS>

Align the center of platen fixing lever with the position as illustrated in the figure below, and secure the platen
bearing in place.
Platen bearing
Knob
(8) Insert the platen to be used and tighten the platen fixing lever.
Platen fixing lever
141
Platen fixing lever
Knob
Basic printing procedures
Platen bearing
Platen bearing
Center
position
alignment
Platen fixing lever
X0264
X0265