Most of the time if the unit won't hest anything, the problem.is the power diode.
If you are familiar with working with very high voltage, open the unit, carefully discharge the power capacito using an insulated screwdriver.
Now look for any loose wiring. Reattach any loose wires to their contacts.Check and replace any blown fuses with identical ones.
Now, locate the piwer diode in the high voltage circuit and test it for function. This diode is often the only problem. I have repaired many microwaves by only replacing this diode.
If everything checks out so far, read the schematic and test the large step-up transformer. Afterwards, check the circuitry containing the magnatron.
Except for the transformer and the magnatron, the unit will be worth repairing. If the transformer or magnatron is the problem, the cost of the replacement parts is higher than a new unit.....unless you happen to have the right working part lying around.
Hope this helps. But remember, ALWAYS discharge the high-voltage-capacitor.....the charge is enough to hurt you SEVERLY!
Answers & Comments
Most of the time if the unit won't hest anything, the problem.is the power diode.
If you are familiar with working with very high voltage, open the unit, carefully discharge the power capacito using an insulated screwdriver.
Now look for any loose wiring. Reattach any loose wires to their contacts.Check and replace any blown fuses with identical ones.
Now, locate the piwer diode in the high voltage circuit and test it for function. This diode is often the only problem. I have repaired many microwaves by only replacing this diode.
If everything checks out so far, read the schematic and test the large step-up transformer. Afterwards, check the circuitry containing the magnatron.
Except for the transformer and the magnatron, the unit will be worth repairing. If the transformer or magnatron is the problem, the cost of the replacement parts is higher than a new unit.....unless you happen to have the right working part lying around.
Hope this helps. But remember, ALWAYS discharge the high-voltage-capacitor.....the charge is enough to hurt you SEVERLY!