Does anyone know what this yellow substance is on my circuit board??

[rego21]

The yellow substance seems to be in the same places on both boards, I'm not sure if it's supposed to be there or not?? The circuit boards are from a power supply from a soundbar

 

[JimB]

It is sticky stuff, ie glue which was put there to help give some mechanical stability to larger, heavier components.

JimB

 

[Nigel Goodwin]

Yes glue, perfectly normal as JimB said.

 

[rego21]

It is sticky stuff, ie glue which was put there to help give some mechanical stability to larger, heavier components.

JimB

Yes glue, perfectly normal as JimB said.

Ahhh ok, thanks for the info guys

 

[ronsimpson]

Many products go through a vibration test. Large components will fall off the board. The legs will brake after time. (glue)

 

[ramondo]

LFP205991-0001 in Google reveals this,, may help,,check photo for arrow.

Sony. SH-CT60, SH-CT60BT, Dead No Power. Repair Kit. Advise. LFP205991-0001. | eBay

Has your beloved Sony SH-CT60 or SH-CT60BT suddenly fallen silent, leaving you in an audio void?. If symptoms like "dead, " "no power, " or "no LED" are plaguing your speaker, the culprit might be a faulty capacitor.

www.ebay.co.uk

 

[Nigel Goodwin]

LFP205991-0001 in Google reveals this,, may help,,check photo for arrow.

Sony. SH-CT60, SH-CT60BT, Dead No Power. Repair Kit. Advise. LFP205991-0001. | eBay

Has your beloved Sony SH-CT60 or SH-CT60BT suddenly fallen silent, leaving you in an audio void?. If symptoms like "dead, " "no power, " or "no LED" are plaguing your speaker, the culprit might be a faulty capacitor.

www.ebay.co.uk

Yes, I've replaced a number of PSU capacitors in 'Sony' soundbars - obviously it's NOT a Sony product, and is just bought in from China - because capacitors don't fail in 'real' Sony products as they fit higher quality ones than lesser manufacturers.

In fact I've got a Sony soundbar myself - I delivered a new one to a lady, and she asked me to take the old one and dispose of it for her. One quick capacitor later, and I disposed of it at my house

In fact, following your excellent link, if you check the original photos you can see that capacitor is domed, so most likely it's low ESR.

 

[rego21]

Many products go through a vibration test. Large components will fall off the board. The legs will brake after time. (glue)

I appreciate the added info mate

 

[rego21]

LFP205991-0001 in Google reveals this,, may help,,check photo for arrow.

Sony. SH-CT60, SH-CT60BT, Dead No Power. Repair Kit. Advise. LFP205991-0001. | eBay

Has your beloved Sony SH-CT60 or SH-CT60BT suddenly fallen silent, leaving you in an audio void?. If symptoms like "dead, " "no power, " or "no LED" are plaguing your speaker, the culprit might be a faulty capacitor.

www.ebay.co.uk

Appreciate the link you shared, you've saved me a lot of time, thanks a lot

 

[rego21]

Yes, I've replaced a number of PSU capacitors in 'Sony' soundbars - obviously it's NOT a Sony product, and is just bought in from China - because capacitors don't fail in 'real' Sony products as they fit higher quality ones than lesser manufacturers.

In fact I've got a Sony soundbar myself - I delivered a new one to a lady, and she asked me to take the old one and dispose of it for her. One quick capacitor later, and I disposed of it at my house

In fact, following your excellent link, if you check the original photos you can see that capacitor is domed, so most likely it's low ESR.

Thanks for the insight. Yeah I replaced the capacitor mentioned in the link and that sorted the problem for the two of them

 

[Nigel Goodwin]

Thanks for the insight. Yeah I replaced the capacitor mentioned in the link and that sorted the problem for the two of them

It seems a VERY common problem - unfortunate that Sony would buy in such poorly made equipment, when it's usually so good