Adjustment; Head Alignment; Index Alignment - Tandy 1400LT Service Manual

4. Adjustment
4-1 Head Alignment
a) Measure the Cat's Eye Pattern. (Refer to 2-3-1,-6)
b) Loosen the two screws for stepping motor.
c) Adjust the head alignment within k 9 p m by moving the stepping motor by hand.
(Cat's Eye ratio should be more than 0.9)
d) Fasten the screws for stepping motor.
e) Confirm the head alignment again.
STEPPING MOTOR
Figure D-7. Head Alignment
4-2 Index Alignment
a) Measure Index Alignment. (Refer to 2-3-1, -8)
b) Adjust the Index Alignment for within 500
k 200 psec by sliding the INDEX sensor. (Screw should be loosen
slightly.)
c) Tighten the screw and confirm Index Alignment again.
/SCREW
Index Sensor
Figure D-8. Index Alignment
D-13