Hi everyone.

Im looking to repair a curcuit i have. It will no longer work if the device gets cold. If it is heated up, it will start to work again. Very strange.

I want to replace an IC on the PCB of the device. I need a replacement , but can not find out what would be an equivalent for the IC that is already there.

Hope someone can help me.

The IC: MXT2410 switchmode regulator IC (SO-8 Package)

Link: https://www.ifixit.com/Guide/Philips+Wake-Up+HF3520+Power+supply+repair/130183

Thanks in advance.

/Mikk

 

Welcome to AAC!

Are you certain you'll be able to remove/replace the part? SOIC can be difficult to remove without a hot air tool.

The major distributors I checked (Digikey, Mouser, Newark) don't have that part. All of the availability seemed to be on eBay. I'd be very cautious about buying components there now that counterfeiting is so rampant.

From the link:

 

Thanks Dennis.

I thought an equivalent to such a chip would be easy to find. I guess im just naive

Maybe i will need to go to ebay if i want one.

Thanks anyway for your reply

/Mikk

 

Maybe i will need to go to ebay if i want one.

For about a decade, I used to buy thousands of dollars worth of components and equipment annually from eBay before counterfeiting became so rampant. Now I'll buy components on AliExpress before I'll buy them on eBay. I'll still buy vintage equipment on eBay, but not components.

Before you buy anything, make sure you'll be able to remove and replace the part. Surface mount rework isn't novice friendly.

 

Hi,
Before you reach for your scalpel and crow/ wrecking bar.
Have you tried heating/ cooling specific components?
Apologies if you have already passed that stage.
Please keep us informed of your progress.
Good luck........

 

Hi Dennis. I was thinking i could remove it by soldering iron and a solder sucker thing. Maybe im way more naive than we thought But im fairly gung ho with this kind of stuff.... If it dies it dies, its almost dead already..... or is it...?

Hi, Twohats.
The weird thing is, for the last few days it has showed no problems. The device has been standing in my window sill for years. Drafty with the window open every summer, so it has probably been damp as well.

The first time that it would not turn on, i heated it up with a hairdryer, and it started working again. I have no idea why the temp of this chip is having this effect...? But as of now, it is still working fine.... Do you have any crazy ideas i could try next time it is acting up?

/Mikk

 

I was thinking i could remove it by soldering iron and a solder sucker thing.

My experience is that even with through hole parts, a solder sucker doesn't remove all of the solder. It works with through hole parts because you can use a tool to break the connection the small amount of solder makes. With surface mount parts, you aren't going to have much, if any, gap between the lead and the pad.

Some have used low temperature solder to allow them to get the solder on all pads melted at the same time and sliding the component from the pads.

I've tried solder tweezers with various tips with no success.



A hot air tool with an appropriate tip can melt the solder on all pads at the same time so you can slide/lift the component off the pads.

 

Thanks, for the replies guys. For some reason, the device is working for now. So i guess im leaving it for now, also since getting the part is kind of a hassel.