Component Teardown
4-6
15. Remove the fan blade from the fan motor shaft
according the following procedure.
a. Hold the edge of the rotor of the fan motor by
using a pair of grove joint pliers.
b. Remove the fan blade from the shaft of the fan
motor by pulling and rotating the fan blade with
your hand.
c. Now, the fan blade will be free.
16. Remove the two (2) screws and nuts holding the fan
motor to the fan duct.
17. Now, the fan motor is free.
Installation
1. Install the fan motor to the fan duct with the two (2)
screws and nuts.
2. Install the fan blade to the fan motor shaft according
the following procedure.
a. Hold the center of the bracket which supports the
shaft of the fan motor on the flat table.
b. Apply the screw lock tight into the hole (for shaft)
of the fan blade.
c. Install the fan blade to the shaft of fan motor by
pushing the fan blade with a small, light weight,
ball peen hammer or rubber mallet.
Make sure that any pieces do not enter the gap
between the rotor and the stator of the fan motor
because the rotor is easily shaven by pliers and
metal pieces may be produced.
* Do not touch the pliers to the coil of the fan
motor because the coil may be cut or damaged.
* Do not disfigure bracket by touching with pliers.
3. Reset the fan duct assembly to its place.
4. Install the tabs of fan duct to the rear cabinet and air
guide.
5. Install the magnetron air guide with the one (1)
screw.
6. Reinstall the main harness and thermistor harness to
each hole of the fan duct.
7. Reinstall the chassis support to the control panel
back plate, waveguide and rear cabinet with the three
(3) screws.
8. Re-connect the wire leads to the fan motor, referring
to the pictorial diagram.
9. Re-install the fan motor grounding wire to the air
guide (Right) with one (1) screw.
* Do not hit fan blade with excessive force when
installing because the bracket may be disfigured.
* Make sure that the fan blade rotates smooth
after installation.
* Make sure the axis of the shaft is not slanted.
Figure 4-4. Fan Motor Components
Do not use this removed fan blade again because
the hole (for shaft) of it may become bigger than a
standard one.
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