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11
DRIVE ASSEMBLY
11.1
Motor
The Micromax utilizes a brushless DC drive motor with
built in Hall effect speed sensors.
Some electrical motor characteristics can be checked,
when the unit is unplugged. These procedures are
outlined in this section.
Test
To measure the resistance of the motor, use the following
procedure:
1.
2.
3.
4.
Remove the lid and cabinet (see sections 8.1 & 8.2).
Remove connector J/P14A (red), J/P14B (brown), and
J/P14C (orange) from power board.
Measure the resistance between each pair of wires
(red/brown, red/orange, brown/orange). Expected
resistance value is approximately 1
Ω.
If an open circuit is detected, or if any lead does not
read open with respect to ground, replace the motor.
Motor Replacement
Use the following procedure to replace the motor:
1. Remove the lid and cabinet (see section 8.1 & 8.2).
2. Remove the rotor.
3. Remove the rotor adapter. The adapter is removed by
loosening the two Allen screws (3/32”) in it and lifting it
off.
4. Remove the black rubber motor boot. The motor boot
is a molded part which has a channel that fits onto the
guardbowl (no adhesives hold it in place). To remove
it, grab a portion and peel it away from the guardbowl.
5. Disconnect motor wires from power board at J/P13,
J/P14A, J/P14B, and J/P14C.
6. The brake resistor wires may be ty-wrapped to the
motor wires. If so, cut and remove the ty-wraps.
Micromax Series
39
Service
Manual
Содержание Micromax 3590
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