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1.
Unscrew and remove the home switch actuator
which serves as a lock screw to retain the rod
in the carriage bracket.
2.
Remove the set screw which secures the rod
in carriage bracket.
3.
Detatch the rod by unscrewing
it
from the
carriage bracket, and slide the rod away from
the home switch and out of the tachometer coil
and housing assembly.
4.
Replace tachometer extension rod by reversing
steps 1, 2, and 3.
4.12.2 Tachometer Extension Rod Adjustment*
The tachometer extension rod is to be adjusted
visually by positioning the tachometer shield so that
the groove on the rod is flush with the end of the
carriage end of the tachometer shield when the car-
riage is detented at track 000. Perform the ad-
justment as follows:
NOTE:
Do
not disconnect the rod from carriage to
make this adjustment.
1.
Detent carriage to track 000.
*Altemate procedures are contained in Chapter 7 for machines with
serial numbers 00001 through 00050.
227 -5984 (9/65)
2.
Loosen the two set screws which secure the
tachometer and shield to the carriage mounting
base.
3.
Slide the shield along the rod until the groove
in the rod is flush with the end of the tachometer
shield.
4.
Tighten the two set screws to secure the ad-
justment.
5.
Check the carriage for friction to ensure that
binding does not prevail as a result of making
the tachometer extension rod adjustment.
4. 12.3 Tachometer Assembly Removal and
Replacement (Figure 4-2)*
1.
Remove disk cartridge from machine.
2.
Remove cartridge receiver, shroud, and spindle
from base plate.
3.
Unsolder tachometer cable leads from terminals
on tachometer, and mark each lead to facilitate
identification.
4.
Remove the tachometer extension rod (see
section 4.12.1).
4.15
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Troubleshooting
