Sharp Aquos LC52SE94U hit by surge

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

I was just asking a general question Selldoor. I know very little and trying to learn. My question was asking if TO262 is a case type? If so what is the definition of a TO262 case?

[tom66]

Re: Sharp Aquos LC52SE94U hit by surge

TO262 is a case format. It's like the TO220 but the metal tab is missing, it's primarily used in surface mount applications (like TO263, known as D2PAK.)
You want TO220 format.

[budm]

Re: Sharp Aquos LC52SE94U hit by surge

Just make sure the tab is isolated.

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

TO262 is a case format. It's like the TO220 but the metal tab is missing, it's primarily used in surface mount applications (like TO263, known as D2PAK.)
You want TO220 format.

Thanks Tom66, just came from wiki, looks to me like TO-220F. Can u confirm or does it matter?

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

Thanks Buddm that's the answer I was looking for!

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

So is there a parts list or not, all I could find for rdenca231wjqz was 'unit replacement item'.
Need to spec ic for next step.

[selldoor]

Re: Sharp Aquos LC52SE94U hit by surge

Whoah!! did you see my late edits re P channel N channel

Dont think those digikey ones will do

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

Could you elaborate pls,as I mentioned before, still got my training wheels on. (-:

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

Here is the simplified diagram and the how that shorted out MOSFET is connected.

From this this schem, are these FETs not N channel
I'm getting confused.

[tom66]

Re: Sharp Aquos LC52SE94U hit by surge

They are almost certainly N-MOSFETs.

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

Having difficulty finding anything to match IC7800 that drives the damaged MOSFET Q7808
It's an ST brand with designation DAS001/ on the top line and EZ807 below.

Incidentally the other MOSFET Q7805 paralleled by source pins is driven by IC7801 which is an ST L6562D ( lower line EZ810) it's easy to find.

[selldoor]

Re: Sharp Aquos LC52SE94U hit by surge

Having difficulty finding anything to match IC7800 that drives the damaged MOSFET Q7808
It's an ST brand with designation DAS001/ on the top line and EZ807 below.

Incidentally the other MOSFET Q7805 paralleled by source pins is driven by IC7801 which is an ST L6562D ( lower line EZ810) it's easy to find.

Sorry if I confused you but didnt want you buying the wrong one.
Thing is that almost all the ones listed on Ebay say that it is a P channel
That does correspond with the "P" as part of the part number. Then I realised
that the ones we had seen were all N channel and it does seem odd that the marking for both is the same - still has me wondering anyway follow Tom and Budm on that.
Whilst it is not confirmed I think the das001 is a TSM103 - It was suggested by Ben7 and also appears with the dual description on some schematics if you google images for it

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

Sorry if I confused you but didnt want you buying the wrong one.
Thing is that almost all the ones listed on Ebay say that it is a P channel
That does correspond with the "P" as part of the part number. Then I realised
that the ones we had seen were all N channel and it does seem odd that the marking for both is the same - still has me wondering anyway follow Tom and Budm on that.
Whilst it is not confirmed I think the das001 is a TSM103 - It was suggested by Ben7 and also appears with the dual description on some schematics if you google images for it

Thanks Selldoor , no worries I find confusion a normal part of the learning process. Any idea where to find a data sheet for the das01 or cross reference to TSM103?

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

It looks identical to my PSU board, so it should be close enough. The only difference to me is a missing filter choke probably for the US version, the EMI restrictions are lesser there maybe.

Tom66 can u find the Q7808 on your RDENCA231WJQZ board,I was unsuccessful in finding it on the schem?
Would be on the sink rail near the Q7805...

[selldoor]

Re: Sharp Aquos LC52SE94U hit by surge

Thanks Selldoor , no worries I find confusion a normal part of the learning process. Any idea where to find a data sheet for the das01 or cross reference to TSM103?

No google in Canada? here is one- you can find others

http://elektrotanya.com/files/forum/...001_TSM103.JPG

doesnt prove anything.

I have gone to Algeria for 2 weeks so probably no internet
Well not for free!!

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

No google in Canada? here is one- you can find others

http://elektrotanya.com/files/forum/...001_TSM103.JPG

doesnt prove anything.

I have gone to Algeria for 2 weeks so probably no internet
Well not for free!!

No but a data sheet would I believe. I have the google -just not the experience or background knowledge...
I hope you are in Algeria for pleasure on a vacation, regardless, enjoy!
Thanks for the help.

[tom66]

Re: Sharp Aquos LC52SE94U hit by surge

I will try and check your part requested as soon as I open the TV again.

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

Thanks in advance Tom66.
As far as I can tell the Q7808 does not exist in the RDENCA231WJQZ.

[Fwrothy]

Re: Sharp Aquos LC52SE94U hit by surge

I will try and check your part requested as soon as I open the TV again.

Thanks anyway Tom66 I have confirmed it does not exist on that board nor does the second coil l7802 under the cage.

I have ordered a new MOSFET but do not have a scope to check the L6552 (IC7801) oscillator that drives the gate. Any suggestions?

[budm]

Re: Sharp Aquos LC52SE94U hit by surge

So your board is not the same as the one from Shopjimmy that we were using to troubleshooting your board? it does not have Dual PFC circuits?
I will not taking a chance of installing the new MOSFET without replacing the IC, if the the out put of the IC is stuck on HI (instead of turning the MOSFET ON-OFF), it will cause your new MOSFET to blow, so makes sure to leave the lamp in place of the fuse.
Your picture in post 18 I see two MOSFETs and two PFC diodes though.