Question about APC BE750G BackUPS ES 750 Battery Backup System TenOutlets 750 Volt Amps (1 Each) (UNAPWBE750G) UPS System
I placed a meter on it and it's only reading 6.3 volts DC. Tried searching for a repair/service manual, but it's like they don't exist.
Lawrence Oravetz is correct, however, a little more information: I have never found a capacitance checker that really works with in-circuit capacitors or that was accurate! We would have to pull on leg of each capacitor and test it. This has two problems 1.) the leg breaks off or 2.) the foil overheats. Proceed at your own risk. If you can get an oscilloscope on it you should find it! I love it that you're trying.
Posted on Apr 26, 2015
Why don't you check all FETs / IGBTs as well fuses on the charger side of the board.
Posted on Mar 12, 2015
Electrolytic Capacitors puff up when they short. The top of the housing is no longer flat. It becomes domed. The plastic label may dis color and split. The rubber plug in the bottom of the capacitor can blow out and leak the innards out. Other types of capacitors cannot be easily checked with a volt meter unless you have a diagram with the voltage expected at that point is given.
Posted on Apr 26, 2015
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Make sure that the program controller is working if not check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if the switch contact are not good then it will not trigger the processor to switch on the waveguides. If the lights or fan work without any display or action of program being triggered to start then it can be a possible fault on the main board or the processor. Sometimes insect secretion can short the board and display panel and so the processor can work in such an erratic manner. If so clean,solder and reset the board.Now identify the parts by clicking this link: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html
If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off. Check the wave guide covers, if food had deposited
then it must be checked or replaced.
Now keeping clear of the microwave, switch on, use a cup of water inside to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.
If there is heating without any issues, you can use the microwave safely
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