Name this burnt chip!

[Rolin]

I have a customer who tried to install an LCD (LED backlight) screen in his Sager laptop. He thinks the cable connector was in a little crooked and tried to adjust the cable with the laptop powered on! He smelled smoke! He quickly turned it off! But now there is no backlight on either his old or new LED screen (the original screen was cracked with a working backlight).

I disassembled the laptop down to the motherboard and found this burned chip. Part of the chip is missing so I can't get a part number from it.

Can anyone tell me what this chip is? It's near the LCD/LED connector cable on the motherboard - so it must be related. What are the chances that this chip will solve the backlight problem, or is there most likely more damage I cant see?

Thank for any help on this in advance!

John

[ktmmotocross]

Re: Name this burnt chip!

wait while i bring my oracle crystall ball and i tell u exactly what is the name of you ic, your board and if is something else bad.

[tibd]

Re: Name this burnt chip!

When asking such a question to identify a burnt chip then your best chances getting a good answer is that you provide the PCB platform model and revision. The name and model of your laptop is sometimes crucial too. The chipset model.

The chip you are referring to is the Q4, try to get schematics for your motherboard and then its solved. I would definitely start by changing that chip at first.

[shijeesh]

Re: Name this burnt chip!

Which Model Laptop this.

[Rolin]

Re: Name this burnt chip!

Thanks for the replies. Sorry for the missing information - I'll provide that now. I was hoping that since some of the part number is showing (35__ 3G01), someone might be familiar with backlight circuits and fill in the missing remainder of the number.

I have looked for schematics or even a clear picture of the motherboard so I can see the complete number on the chip - so far nothing. But if anyone could help, it would be appreciated.

The Laptop is a Sager P370SM (appears to be manufactured by Clevo). The motherboard part number is 6-77-P370SM3A-N13

Again, I know this is a long shot, but I felt I would ask here because I've had great help in the past. This is an expensive motherboard and I certainly would like to make an attempt for my customer.

Thanks again....

Rolin

KTMMOTOCROSS, You must have amazing crystal balls....

[shijeesh]

Re: Name this burnt chip!

Please Check it this schematic.

[Rolin]

Re: Name this burnt chip!

Wow, that is amazing. Not sure how you found this schematic, but I can't thank you enough!

Now I just need to find a MTS3572G6. Mouser and Digikey don't have it. Any ideas where to find this chip? According to the spec sheet, it's a N- AND P-CHANNEL ENHANCEMENT MODE POWER MOSFET.

John

[popeye]

Re: Name this burnt chip!

if you can not find a supplier then check for an equivelent

[Rolin]

Re: Name this burnt chip!

I just called Mouser and Digikey - they can't find anything that crosses over to this part. Closest item Digikey has is max 30 volts on both the P and the N side. But the original has 20v P side 60 N side, and in the circuit I see 50V caps around this circuit so I wouldnt' think that would work (considering this is an inverter circuit, the voltages I'm sure are important).

Anyone have any ideas where I could find this? Mouser and Digikey have no idea who might carry this and I've googled the hell out of this part number and partial numbers - nothing comes up as a cross or stock.

Rolin

[Rolin]

Re: Name this burnt chip!

I've called Mouser, Digikey, Allied, Newark and no one has anything close to the MTS3572G6. The problem is the voltages on the N and P side - they're worlds apart at 20V and 60V. According to everyone I've spoken to this is very unusual - 30V on both sides is the closest and of course it won't work. I just emailed the Cystech in China to see if this is avail in the US - but I'll be surprised if they respond back with any usable answer.

If anyone can think of an option, it would be appreciated! But at this point I'll most likely have to tell the customer he needs a new motherboard (an expensive option).

Thanks again for all the help on this. It's just too bad it's such an unusual and rare component!

Rolin

[tibd]

Re: Name this burnt chip!

Its quite rare not because of the voltage ratings of the N and P side, any other NP enhancement fet would work fine if the voltage rating is around +/- 30 for both sides. The problem for you is the pin configuration cause the pins 1-2-3 are G1-S1-D2 for your chip, whereas the vast majority of these NP fets have other pin configuration, as of the pins 1-2-3 are G1-S2-G2.

So as for you try at first to find the chip with pin-pin configuration then as for the voltages 30 on N side and -30 of P would work perfect.

[tibd]

Re: Name this burnt chip!

By the way, have you ever thought using separate N and P mosfets ( compatible voltages, amps ). I would definitely try that using SOT 23, or may be better sot-89 package if that dual NP is hard to find. Need some tricks soldering but surely doable.

[Rolin]

Re: Name this burnt chip!

Thanks tibd for the ideas. I'm not an expert at component level repairs like this - but always willing to try especially when I see such an obvious damaged component. I'm going to discuss with the customer tomorrow and see what he wants to do at this point. This chip simply isn't available anywhere.

I'm not sure I am skilled enough to modify with a SOT23 or SOT89 - I would need some help. But if you think a 30/30V replacement with the correct pinout instead of 60/20 volts is safe to use in an inverter circuit I might be willing to try.

Just not sure what to do at this point...

[cyberhack]

Re: Name this burnt chip!

repository for Clevo's bioses and manuals
http://repo.palkeo.com/clevo-mirror/

[tibd]

Re: Name this burnt chip!

Thanks tibd for the ideas. I'm not an expert at component level repairs like this - but always willing to try especially when I see such an obvious damaged component. I'm going to discuss with the customer tomorrow and see what he wants to do at this point. This chip simply isn't available anywhere.

I'm not sure I am skilled enough to modify with a SOT23 or SOT89 - I would need some help. But if you think a 30/30V replacement with the correct pinout instead of 60/20 volts is safe to use in an inverter circuit I might be willing to try.

Just not sure what to do at this point...

Your original chip is a TSOP-6. The SOT89 would be great with proper voltages/ amps. Just make sure that you don't solder with switched pins. The S(source), D(drain) and G (gate) should be soldered to respective place according to original chip. The N mosfet and P-mosfet accordingly too. try to download the datasheet of the part and from part drawing you find out the pin configuration and which of sides is N or P. Its actually easy done but need some hand skill in soldering.

On the other hand if you find an item with pin-pin compatibility and around 30 v on both side with acceptable Amperage in range then I would go for that option first.