Samsung UE32F5500AW no picture

[ReeceyBurger123]

Re: Samsung UE32F5500AW no picture

Im quite sure you main processor is at fault, it is responsible for turning that booster on from what I can tell.

[rtstorm]

Re: Samsung UE32F5500AW no picture

I found that PHASE2 is shorted to GND maybe that produce all the problems. Maybe the shortage is in main processor. Is it ok to remove the processor and then check for shortage?

Main processor is BGA type KL5T3067

[rtstorm]

Re: Samsung UE32F5500AW no picture

Well i removed the processor and shortage is gone, so i guess the problem was main processor.

What do you think?

[budm]

Re: Samsung UE32F5500AW no picture

Well, it looks like you narrow it down to the cause of the problem.

[budm]

Re: Samsung UE32F5500AW no picture

BTW, the FET201 that you removed, does it tested as shorts between the S and D pin of both MOSFETs?

[rtstorm]

Re: Samsung UE32F5500AW no picture

I tested the FET201 for shortage and it is ok.

I also try to remove the main processor and put it back, as soon as i put back the CPU the shortage retrned

[budm]

Re: Samsung UE32F5500AW no picture

Well, it is may be time for a new board.

[ReeceyBurger123]

Re: Samsung UE32F5500AW no picture

Yep as I suspected. Fucking crap these boards are, if only they heatsunk them devices these would have lasted. Unless you have a bga station you will need a new board you can find the processor though on google, I dont so I hope its only IC200 faulty on mine.

[Diah]

Re: Samsung UE32F5500AW no picture

Yep as I suspected. Fucking crap these boards are, I hope its only IC200 faulty on mine.

yours !C200 was getting hot right.. will pray for you to be IC200 only... but believe my pray don't reaches the heaven LOL

[budm]

Re: Samsung UE32F5500AW no picture

You already tested the outputs for shorts already so you may be OK, if the upper MOSFET of the FET201 shorted out then it can dump 13V to the PHASE2 (2V Buck regulator) output and damage the ICs.

[ReeceyBurger123]

Re: Samsung UE32F5500AW no picture

yours !C200 was getting hot right.. will pray for you to be IC200 only... but believe my pray don't reaches the heaven LOL

Lol Diah cheers

[rtstorm]

Re: Samsung UE32F5500AW no picture

I have bga rework machine, but on aliexpres whole board is 50USD so it is not worth to repair this. I will ask customer if he want to replace board

[ReeceyBurger123]

Re: Samsung UE32F5500AW no picture

Try replacing the chip ? How do you know the board off Ali is going to last if its used ?

[rtstorm]

Re: Samsung UE32F5500AW no picture

It say it is new hahah, i will put heatsink on power IC and CPU

[ReeceyBurger123]

Re: Samsung UE32F5500AW no picture

Lol also yes out a heatsink on all 3 chips on the board, I will if I fix mine or replace it. All these Leds are shit, also after you fix it dont forget to turn down the backlight

[rtstorm]

Re: Samsung UE32F5500AW no picture

My client do not want to repair it any longer so its a cancel.