Short circuiting dough mixer

[Paul Hampson]

Hi, I’ve got a brand new dough mixer which won’t work. Out of the box it just popped when switched on and tripped the power in my shop. Using a voltage pen I’ve detected that there’s power getting into the circuit board but not out. Noticed the fuse in the board was gone so replaced it and when switched back on it blew up again with a blue flash. I’m not familiar with the working of circuit boards, is it likely that if I replaced that it would be fine or is the problem likely to be more deep rooted? Any advice would be welcome, thanks!

 

[DPG]

Get it replaced under warranty if it's brand new.

It's definitely a 240VAC one isn't it?

 

[Paul Hampson]

Get it replaced under warranty if it's brand new.

It's definitely a 240VAC one isn't it?

Thanks for your reply. It’s a funny one with the warranty, I had a previous machine which broke when under warranty and since it couldn’t be fixed they sent me a new machine. I’ve only now got round to using it but the warranty was based on the purchase date of the original machine so it’s now expired. Never thought for one minute that the brand new one would have a problem so was happy to leave it boxed until I needed it. Its definitely 240VAC.

 

[DPG]

Ah I see. Fair enough.

Well it's impossible to say without seeing it, but if the fuse went with a flash/bang them it's not just a small overload but something more serious. You could post a picture of the circuit board.

Does it have electronic speed control?

 

[Paul Hampson]

Ah I see. Fair enough.

Well it's impossible to say without seeing it, but if the fuse went with a flash/bang them it's not just a small overload but something more serious. You could post a picture of the circuit board.

Does it have electronic speed control?

It doesn’t have an electronic speed control, it’s a manual knob. Here’s a picture of the circuit board.

 

[DPG]

It doesn’t have an electronic speed control, it’s a manual knob. Here’s a picture of the circuit board.

Switch mode power supply and/or speed controller I reckon. How much can you get replacement circuit boards for?

 

[Paul Hampson]

Switch mode power supply and/or speed controller I reckon. How much can you get replacement circuit boards for?

I can get a new board for £80. I don’t mind paying that, was just worried that it might not be the board that was the problem and I’d just be chucking money down the drain. Funnily enough, when I opened up the machine after the first time it blew, the ribbon cable to the speed control button was partially burnt through. I assumed this was the problem so bought and fitted a new speed control button and cable but it still didn’t work. See picture, don’t know if it has any relevance.

 

[DPG]

Not something I'd want to take a gamble on. Having said that, how much is the machine worth?

 

[Paul Hampson]

Not something I'd want to take a gamble on. Having said that, how much is the machine worth?

About £300! I might have to take it to an appliance repairer and put the onus on them to identify the problem.

 

[DPG]

About £300! I might have to take it to an appliance repairer and put the onus on them to identify the problem.

Ah, probably worth repairing then.

yeah, that's what I'd do in your position to be honest.

 

[Paul Hampson]

Ah, probably worth repairing then.

yeah, that's what I'd do in your position to be honest.

Thanks for your help, much appreciated!

 

[DPG]

Thanks for your help, much appreciated!

Don't think I've helped much to be honest. Let us know how you get on though.

 

[Rockingit]

There are times when we all call on specialists to help us - by definition what is 'regular' to me is 'special' to someone else so there's no shame in doing so. Case in point, our washer/dryer decided to die over the weekend, literally just won't turn on - dead as a parrot. Naturally I had a quick check of fuses, looms not damaged and so on, whereupon (and especially given that I was also packing to go away on work for three weeks..) contacted our local applicance guy to come and take a look. I could probably have spent some time inside the guts with my meter, reverse engineering what was meant to be going on, then take a chance on ordering the right spare part..... nah. Get someone else to do it who knows what they're looking at and might even have a slim chance of having the parts on their van. Chat and a coffee, job done.