Zanussi Noise Filter

[Denp]

I have a zanussi Lindo 300 model ZWF91483WH and the control panel does not light up, i have had a look round and some say that the Radio Interference Filter may be the problem. in all the guidance i can find, this capacitor is usually located at the end of the mains lead where it passes through the back panel of the machine but the lead on my machine goes straight int the box where i assume the pcb is. my question is, is there a capacitor in this box if so how can i find a replacement without taking the thing apart and if there isnt one should i just go for a new pcb. please see attached photo

thanks 

denp 

[Whitegoodshelp (Andy)]

Hi Denp. Unfortunately, appliance repair engineers are never taught about repairing PCBs. They are only taught to replace the whole thing, which is - and always has been - extremely wasteful. Unless someone here is an electronics person, you may not get much help. I've been in appliance repair business for over 40 years, and I know very little about anything inside a PCB.

[Whitegoodshelp (Andy)]

My main advice would be that it's pointless just changing anything because it "might" be the problem because it obviously could prove pointless and a waste of time and money. To repair a pcb you need to understand how to test individual components and of course how to source them because the appliance manufacturers don't sell them.

[Denp]

Hi 

Thanks for your advice.my problem is that I retired to a small island where an engineer has a hammer and electronic engineer is the same chap with a smaller hammer. So we have to fix things ourselves. I was told by zanussi the noise filter or the PCB may be at fault but looking for the filter I can't find it so I can only assume that it's part of the PCB as the mains cable goes straight into the plastic enclosure, the decision that I have to make is to buy the PCB and another bit for around £200 or have a new machine shipped from the UK, I could get one on the main island but to get it here would cost about a grand and they aren't much good, so the first thing I think is to try a repair, all options are costly 

[Whitegoodshelp (Andy)]

The mains filter or suppressor is usually the first thing the mains cable goes into inside the machine. 

[Denp]

heres another picture, this time ive disassembled the unit. i reckon that the noise/radio interference filter is the copper coloured coil at the top left next to the mains input socket . grateful for anyone's opinion

[Whitegoodshelp (Andy)]

Doesn't look like it to me, though as I said I'm no expert on components. A device to suppress interference on radios and even TVs is usually like a capacitor and large. They are fitted right at the end of the mains cable running into the washer. They are called a suppressor. If faulty, it can make the whole machine dead. I don't know if they have them inside PCBs too or not though. Nor, if they do, what symptoms you would get if one fails. But search Google for - Radio Interference Filter and you will see lots of large capacitor-like devices.

I honestly think it's a bad idea to try and fix something that you can't identify or understand how it works, and not even sure is anything to do with the fault. I'm an experienced appliance engineer, and I wouldn't try for sure. Not unless someone told me exactly what part was causing the fault, and how to replace it and where to get it from. I appreciate that's mostly what you are trying to do, but appliance engineers don't repair them, so it's very much a long shot.

[Denp]

yes this is a mystery. Prior to posting i did check google and found some noise filters that look like whats on my board though nothing conclusive. on other machines the mains lead goes to a unit that we can all recognise as a capacitor, on my board the mains lead goes directly to this  "coil" and nowhere is there a capacitor so i'm making what i hope is a calculated guess that what i'm looking at is a form of capacitor. its a shame that when ive contacted the manufacturer they cant or wont offer any help. i think ive made the decision that because i'm in a place where i cant get an engineer and to buy a very basic machine would cost nearly £1500 i am going to bite the bullet and get a new board sent out and hope for the best. thanks for your help it was really nice of you to take an interest 

[Whitegoodshelp (Andy)]

Ahh. If the mains cable is going straight to the PCB then I can imagine a mains filter would likely be inside the PCB. Please let us know how you get on. In the UK there is a company called QER who you can send a board to for testing but I assume they only deal with UK. Not sure though. 

[Denp]

Thanks I'll check it out.i'll let you know what happens 

[Denp]

On 26/09/2022 at 14:46, Whitegoodshelp (Andy) said:

Ahh. If the mains cable is going straight to the PCB then I can imagine a mains filter would likely be inside the PCB. Please let us know how you get on. In the UK there is a company called QER who you can send a board to for testing but I assume they only deal with UK. Not sure though. 

Just to keep you updated, I am now back in the UK and sent my board to QER who say they can fix the board but its the first time they've had one of these and they have to order the component. btw they say that the noise suppressor is part of the board. so fingers crossed it will be repaired and when i go back in the new year the machine will work. i'll keep you updated.

[Whitegoodshelp (Andy)]

Excellent. Please do let us know what happens.

[Denp]

On 21/10/2022 at 16:30, Whitegoodshelp (Andy) said:

Excellent. Please do let us know what happens.

Well i was finally able to get my repaired main board fitted, i put it in, connected up and switched on and the display panel lit up but it displayed the error code 40 which turned out to be a faulty door lock but i was lucky that i had a spare or i would have had to wait for someone to bring one out from the uk. the machine has been working well for the past week.

many thanks for your help and advice, invaluable!

all the best

Dennis

[Moulnisky]

On 20/01/2023 at 13:16, Denp said:

Well i was finally able to get my repaired main board fitted, i put it in, connected up and switched on and the display panel lit up but it displayed the error code 40 which turned out to be a faulty door lock but i was lucky that i had a spare or i would have had to wait for someone to bring one out from the uk. the machine has been working well for the past week.

many thanks for your help and advice, invaluable!

all the best

Dennis

Hi, Old thread but just for your info about the fault in your board. This board use an LNK586gg and as common fault the IC is prone to die. If you see your old picture the resistor R6 (the one between the blu capacitors and vertical capacitors) is broken as it acts as fuse in this circuit. just over the big vertical capacitor there is a chocke coil of 470uH who needs to be replaced too as the IC LNK586gg located on the right side next to the transformer. Useless to say all those components need to be bought from abroad as rare to find in UK. Kindly regards.

 

[Moulnisky]

[Moulnisky]

Spares arrived (finally) and soldering done. EWX11831/ELEW109 repaired and Zanussi lindo 300 back at work 

[Denp]

50 minutes ago, Moulnisky said:

Spares arrived (finally) and soldering done. EWX11831/ELEW109 repaired and Zanussi lindo 300 back at work 

What components did you replace?

[Moulnisky]

6 minutes ago, Denp said:

What components did you replace?

the regulator and the fuse resistor