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I recently plugged a Breville BWM640 waffle maker that is designed for 110V into a 220V outlet. I heard a small pop and the appliance stopped working. I opened the machine up and found what i think is a blown capacitor on the power board. I am wondering how i determine the capacitor size and type so i can replace it. Is it a case of removing it and taking it o an electrical supplier? Any help is appreciated.
Hi @gcam , It is a MOV (metal oxide varister) that is used as a surge suppressor. There may also be a fuse as well but cannot see too well in the images as it may be hidden by the white cable sheath. It could be a micro fuse in a round vertical red (orange/brown?) package. If possible see if you can read the markings on the MOV as it will have the specification code printed on it. Try not to touch any printing on it with your fingers. On some it rubs straight off ;-( If there is no markings left discernible you may be able to locate a replacement board online, not to purchase, but sometimes they post images and you may be lucky to “read’ the MOV in the image. Try searching either using the model number or perhaps just the board number. (ignore the (94V-0) that is just a pcb “manufacturing standards” marking Otherwise you may have to contact Breville parts about a possible board replacement or if the spare parts person is helpful, information about the MOV. Good luck. Update (11/17/2019) Hi @gcam , It is the product manufacturer’s name (CNR) and product specifications information. I’m wondering if it is actually CNR 10D271K as I cannot find anything when looking for a CNR 100271K I have found the CNR Transient suppressors datasheet pdf (see p.5) where I found the specifications for the above code. (see image)
(click on image to enlarge for better viewing) It is a 175 VAC 225 VDC MOV with 10mm leg spacing and all the other associated specifications. 175 VAC rating would be about right for a 120 VAC supply. Have to allow for transient power surges that are more than 120 VAC but definitely not as high or continuous as 220 VAC supply ;-). Unfortunately I couldn’t find an exact replacement. The nearest compatible replacement that I could find was this one. It has nearly exactly the same characteristics BUT its’ Max Energy rating 10/1000 uS is only 28J whereas the one you have is rated at 40J. All the other parameters are the same. Given the cost of the part it still may be worth a try. Just wondering what the component shown in the image below encased in black but with metal ends is. Perhaps it could be a fuse.
(click on image to enlarge for better viewing) If you have an Ohmmeter just connect it across either end and check it you get a 0 Ohms i.e. a short circuit reading. Having no component designations on the board doesn’t help. It is tests open circuit is the covering made of rubber? Can you peel it back to expose whether it may be a fuse if it has a glass tube there? If it tests resistive i.e. has a resistance measurement don’t worry about it. Hopefully this is of some help.
