Radio Shack TRS-80 PT-210 Service Manual page 51

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Replacement of the CR Motor
-
The Timing Belt can be detached by removing two
screws
((2)
and
(3))
and taking out the Motor
Timing Pulley.
Take out screw
( 1 )
(Motor Set Screw) and remove
the Motor from the Frame Unit. Disconnect the
connector to control P.C.B.
Install the new C R Motor on the Frame Unit (do not
tighten the Motor Set Screws yet).
Hook the Timing Belt to the Motor Timing Pulley
and install the Timing Pulley on the Motor Shaft.
Set the position of Motor Timing Pulley so that
it
is 10 mm from the Motor Supporter or 13 mm
from the Motor face.
Move the head till the left edge of platen. (see
Figure 47)
Push the middle of timing belt by the tension gaze.
Set the position of CR motor till the tension gaze
indicate 30
-
60 g.
Tiahten the Motor Set Screws.
CR Motor Assembly
Figure 47.
Figure 48.