My Electrolux EWF1090 PCB burn.There is one Transformer with Printed "Hartu 717162-51" burn. May i have detail of this transformer ? Primary Side voltage (2 pins) ? Secondary Voltage (3 Pins) ? VA ?

go to an electrical whole sale business and see if there are transformers available that meet the specifications on the side of the original units and if so then consider getting them and have an accredited electrician change the plugs / sockets for transformers to burn out I suspect that the input voltage into the transformer is not as specified on the trans former and any transformers that you get will have to have the same primary voltage as wht is available at you place

The output voltage on the secondary appears to be tapped at 22 and 16 VAC.

Actually, you may be in luck. A burned cap means that it has done exactly what it's supposed to do. So...you might stick an identical one in there -- it's a 0.1 uF cap, and you can find these at Radio Shack (0.1 uF 50V) or online. They are cheap, so give it a shot.

First, check the 220v line and breakers are properly grounded and that you are getting a constant 220v at the plug. Then you will need to check the transformer on the unit.To test a transformer you need to know what type of transformer it is first. There is a step up transformer which steps the voltage up and a step down transformer which steps the voltage down.
You will still test the transformers the same way for step up and step down transformers. If it is a step up transformer apply the incoming power to the transformer or plug it up. Now take your multimeter and place it on the AC volt scale and test the voltage if the voltage on the data plate says the transformer should step up to 220 volts and it doesn't then your transformer is bad.
Now repeat the same steps for a step down transformer. Plug up the incoming or primary power and test voltage on the outcoming or secondary side the voltage should step down to the proper value. If you don't read any voltage on the secondary or outgoing side then the transformer is bad.
To read the voltage place the two meter leads on the secondary side, or the side you will plug your equipment into. If the secondary side is an outlet then place the two meter leads into the top two slots in the plug and read voltage. You also want to make sure the incoming power is working as well. Otherwise you will be reading a bad reading every time.
If all that looks good, then you will need to replace the control board. Here is a link to the parts for your range.
Regards,Richard

Doing a resistance test on a transformer will not give the information you require as you will read very little, if any resistance. What you need to do is an impedance check and that gets involved. If it is a normally wound transformer, not an auto transformer, you can isolate which is the primary and the secondary windings. Unless the transformer is a multi voltage input unit, the primary side will have continuity through only two terminals. The secondary could be more than two if it is a multi output voltage one. If the transformer is a step down, the primary windings will be the thinner wired windings and vice-versa. To actually test the transformer, get hold of a transformer with about a 20 vac output and try it across the two terminals you have identified as the primary windings, you should ge a proportional voltage of the actual output. eg. with 20 vac input and a 2 vac reading at the secondary, the actual output would be 11 vac if your mains voltage is 110 volts. Take care that you are using the transformer at the voltage it is designed for, otherwise it will overheat and burn out.

its an electrolux fault code.that means .bad connection on communications wire.this is a blue loom of about 5 wires that come off the main pcb and connect to the display board in fascia panel. clean pcb terminals and tighten loom connection pins and this should solve problem"
wd 40 or another type spray should do it........
cheers

38v AC I think, similar problem here, check you have a circuit on the primary side of the transformer! If it's open you need a new transformer.

check the ceramic fuse in the primary circuitry as it probably blew out when the primary connection arced and burned through

If nothing will come on check the breaker to the indoor section, check that the service switch by the in door section is on and the blower door cover is tightly closed. If all these junctions are transmitting power then it may be a burned out transformer. If you can check for 120v on the primary coil of the transformer and 24v on the secondary that would tell you where the problem is. If theres no voltage on either side then backtrack from the transformer on the 120v side till you find 120v. If theres 120v but no 24v your transformer secondary is burned out. If theres both then the problem is downstream from the transformer: circuit board 3amp fuse, loose wiring.

There is something on the secondary side which is drawing too much current. I would check all electrolytic capacitors, zener diodes, transistors, and voltage regulators.