Question about Microwave Ovens
Dear Sir, My Godrej 25l convectio+grill model gone blank and shows nothing on the display nor any sound. It was repaired by the authorised service centre and they charged me 900/- bucks for repairing the faulty PCB. In just one day of fixing the repaired PCB, the oven gone faulty. Plz help me what to do..
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Posted on Jan 02, 2017
usually the power diode failed if not check the magnetron some time door switch you have to check most of the microwave not worth to hire some one fixed it.if you call some of repair company they will charge mag + cap+diode+ labor it 's total $500.if you don't want to fix you still have to pay for service call $72..you can buy the kitchen counter around $100
Posted on Jun 22, 2009
SOURCE: I have sharp microwave oven
First I would suggest a "hard reset". Simply unplug the oven for a minute or two, then try again.
If it still fails, it may be that the keypad has failed, or there is a bad connection due to moisture, grease, etc.
This is an Australian model, so it's hard for me to give more specific information.
But one some US models the LCD and keypad connect to the circuit board via a rubber "zebra strip" and losing that connection can result in a loss of display segments and / or key response.
I've attached a diagram showing where one can clean to restore operation in this case.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Oct 02, 2010
follow this steps. God bless youwhere you must be able to read a wiring diagram and do some "live" checks on parts. First easy check is to make sure power is coming off your control board at the MW relay. Make sure of the wires and test here, if you have 120 volts at this point, you have ruled out a lot of parts that could be the problem. You have now ruled out any switch problems, control board problems, or a thermostat or 2. If the proper voltage is coming into your control board and you are not getting voltage at the MW relay, then you need to replace the control board. If voltage is interupted by a thermostat or switch from your testing to the control board, then replace that part.
If you do not have power from that MW relay on the control board, you must trace the wiring back to see if the proper voltage is going through your switches, any thermostats, and arriving at your control board. Your wiring diagram on your sheet will show you where and what to test. Below is a general switch test troubleshooting guide.
Now, testing from the MW relay on to your transformer, high voltage capacitor, magnetron, and diode.Do not do any voltage reading from the secondary side of the transformer on, this can be a deadly microwave oven repair if you do not follow directions. This can result in electrocution and the "blowing-up" of your voltmeter, only do OHM testing with the power off and the capacitor discharged. Someplace in this circuit, usually before the transformer, you will have another thermostat to test. It is usually mounted on the magnetron. Do a quick OHM test to see if it is open or closed.
Now to test either the transformer, high voltage capicitor, magnetron, and diode, you must test each part separately. A good rule of thumb, if your capacitor is bad, change the diode also. Another note, if you are working on an OTR model and you have determined to be one of these "heating" circuit parts, you can not test these parts until you take the unit down. If you don't have the parts with you and you have to order them, order the magnetron, capacitor and diode and you will have a 90% chance of solving the problem. If it is an older microwave, order the thermostat also, most times you can return un-used, un-opened parts. Check with your parts supplier. This way you only have to take the unit down once.
To test these parts, scroll down this page and you will see a chart with component tests. Follow the instructions to find which part(s) are defective in your microwave oven repair.
If the proper voltage is coming into your control board and you are not getting voltage at the MW relay, then you need to replace the control board. If voltage is interupted by a thermostat or switch from your testing to the control board, then replace that part.
Posted on Apr 02, 2013
Tips for a great answer:
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If you were to log on to the
manufacturer's web site, I think you will be pleasantly surprised as
usually one is able to download, by model number, Customer
Instruction Manuals, and a list
of Dealers for spare parts, as required.
Just Google the manufacturer's name and
follow the links. Make certain you are directed to the manufacturer's
web site as some search engines direct you to other sites and they
charge for the information that is normally free of charge.
I hope this helps.
Jan 12, 2011 | Microwave Ovens
Nov 23, 2008 | GE JVM1440 Microwave Oven
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