Operating instructions

5.2.3 Reel Motor Replacement
1. Turn the power off and unplug the AC power cable.
2. Remove the guard ring around the reel turntable of the motor to be
replaced and then loosen the two recessed allen screws in the turntable
hub and lift it off the motor shaft. Refer to Figure 5-2.
3. Remove the four phillips screws that secure the upper back panel of the
chassis and fold the chassis down carefully.
4. Unplug the 4-pin UNIVERSAL MATE-N-LOK™ connector on the brake
bracket attached to the reel motor and Reel Tachometer Connector.
Refer to Figure 5-2.
5. Loosen the four cap head allen screws around the motor shaft on the top
of the deck plate. Refer to Figure 5-2.
6. Remove the four motor mount screws and withdraw the motor. Be sure
to support the motor from beneath so it does not fall into the chassis.
Refer to Figure 5-2.
7. Install the replacement motor and secure with the four motor mount
screws removed in Step 6.
8. Tighten the four cap head allen screws around the motor shaft on the top
of the deck plate.
9. Plug in the 4-pin UNIVERSAL MATE-N-LOK™ connector from Step 4.
10. Close the chassis and secure the upper back panel of the chassis with
the four phillips screws removed in Step 3.
11. Place the turntable hub on the motor shaft; tighten the two recessed
allen screws. Place the guard ring around the motor reel turntable.
12. Check and adjust the following:
Reel Turntable Height § 6.1.8
Reel Tension Servo § 6.1.9.
Brake Tension § 6.1.7.
CAUTION! Improper installation can result in costly damage to the turntable
and/or reel motor.
Figure 5-2
Reel Motor Replacement
Section 5 Maintenance
5 - 6
October 1990
MTR-90III Operation and Maintenance Manual