Philips 32PFL3605/12 U4201 replacement

[Pulka]

Hello everyone!

This is my first post, but not my first attempt to repair a TV.
So a few days ago I got this Philips TV (TPM4.1E LA), which produced weird symptoms.

There were no 12 and 24V, which was caused by a shorted schottky. I replaced that, the voltages are alright everywhere, but it still refused to turn on or even produce a standby light.
Thats when I removed the cover lid from the U4201, turns out that it badly burnt through, thanks to that replaced diode. It's an MTK MT8222TMMU, and I already found a replacement for it. However in the service manual, it's listed as MT8222AMMU/A.

So my question is, should I go through with the TMMU one, or use the AMMU/A?
I'll attach some images which might help, since I couldn't find a datasheet for the AMMU/A.


Thank you to everyone in advance, who might be able to give some advice!

[dskall]

Re: Philips 32PFL3605/12 U4201 replacement

I would go for the same as the one one the board. You picked an ambitious repair.

[Pulka]

Re: Philips 32PFL3605/12 U4201 replacement

Thanks! I figured that I should just pick the same one.
I tend to pick up TVs with power issues, since they always have a surprise in them. I mean, what's the fun if it's just some caps? ;D

[dskall]

Re: Philips 32PFL3605/12 U4201 replacement

My first attempt at doing one of these ic was a bunch of torn off traces.

[R_J]

Re: Philips 32PFL3605/12 U4201 replacement

Since the ic is definitely bad, use a sharp knife to cut the pins right at the ic body making sure you don't cut down to the board and cut a trace, then you can easily remove the pins from the board.