Vizio VO42L FHDTV10A No Power

[bbjunkie]

Re: Vizio VO42L FHDTV10A No Power

Application note for this AN7602 controller can be found here:

I dont see any vendors at all (not even Chinese) for this device. No doubt there will be some sort of equivalent though.

[retiredcaps]

Re: Vizio VO42L FHDTV10A No Power

Does anyone know what this is and where to get it?

1) Type in part number and the word datasheet after in your favourite search engine.

2) findchips.com for where to buy

http://www.findchips.com/avail?part=FAN7602

3) Or ebay.com

[Xecuter]

Re: Vizio VO42L FHDTV10A No Power

This is confusing me. Google doesn't give me any exact matches for the controller ic.

How could I find an equivalent ic? I saw this on ebay, but it doesn't give specific info.
http://www.ebay.com/itm/FAN7602-IC-S...item2a164224b7

I also took a look at the link provided by retiredcaps and there are so many options. How do I find out which one to get?

[bbjunkie]

Re: Vizio VO42L FHDTV10A No Power

That one on eBay is what you are after. Although, beware he has some very bad feedback.

Strange, I checked there earlier and missed that.

Jim

[Xecuter]

Re: Vizio VO42L FHDTV10A No Power

Also, I don't know what wattage rated resistors to get. I already figured out the values.

Does anyone have any ideas? I'd really appreciate any input.

[selldoor]

Re: Vizio VO42L FHDTV10A No Power

Ebay item seems expensive is that is for 1 piece? If you were already ordering parts from Mouser or Digikey they are only about 1$.
Without a schematic Im not sure how you are going to get the wattage for the resistors
did you see my earlier link. Wattage and package size are related so if you measure the
faulty parts then look up the parts on Digikey/Mouser It will probably give the package size.
Have a look at this http://uk.mouser.com/MobileCatalog.a...G0gcmVzaXN0b3I

[bbjunkie]

Re: Vizio VO42L FHDTV10A No Power

Also, I don't know what wattage rated resistors to get. I already figured out the values.

Does anyone have any ideas? I'd really appreciate any input.

Did you figure it out and get the parts ordered?

I'm really looking forward to the continuation of this thread

[Xecuter]

Re: Vizio VO42L FHDTV10A No Power

Did you figure it out and get the parts ordered?

I'm really looking forward to the continuation of this thread

Yes, I was able to find out the watt rating of the resistors. It's just like you said in a previous post that the watt rating depends on the physical size of the resistor. I was able to pick these up at a local electronics parts shop.

While at the shop I asked if they knew anything about the power mosfet and the fan7602 ic and they were unable to come up with any information on them.

I also went to a tv repair shop and the guy told me that they don't sell components over the counter. I asked him why and he said responded by asking if I had the multi thousand dollar equipment to remove and replace them without damaging the board. I thought that was kind of rude because I felt like he was trying to belittle me. I also think that you don't need equipment that expensive, so he must be exaggerating.

Instead I ended up purchasing the power mosfet and ic from ebay. This is what I got:

Mosfet - http://www.ebay.com/itm/STP9NK70ZFP-...item19cbbbb0de

IC - http://www.ebay.com/itm/FAN7602-IC-S...item2a164224b7

I now anxiously await delivery.

[selldoor]

Re: Vizio VO42L FHDTV10A No Power

Are you sure these are the same physical size - the 3k ones especially look bigger to me.
I dont know that it matters - perhaps Retiredcaps can comment.

Its going to be a long wait for the slow boat from China so in the meantime:

I dont see any mention of new capacitors being ordered or bought or replaced.

Retired caps did say:

4) I would also suggest recapping this entire power board. Since you got this TV for free, recapping the entire power board will probably be less than $15 USD. Poor quality caps will allow too much ripple into the components.

AND What are the original cap brand and series?

I have a question, probably for Retired caps : can we (well obviously not me) yet guess what caused the mosfet/IC/Resistors to blow- if replaced are they likely to blow again and if some of the caps are bad, and not replaced, could that cause the blow?
i.e should the caps be replaced before the mosfet etc are replaced and run?

Also - has anyone looked at the other boards for faults - is there anything that can be tested without the power board - I dont do big tvs so its not much good me looking.

[bbjunkie]

Re: Vizio VO42L FHDTV10A No Power

I had a smaller set which had bulging caps, changed those and the next day there was an almighty "Splat" from the back of the set, turns out something else blew on the power board. I don't think for a moment it's a coincidence. I'm guessing my bad caps caused it, and putting the fresh ones in was the final straw for whatever it is that has blown.

Therefore, if no sign of bulging caps I would check them for ESR or replace for sure.

[Xecuter]

Re: Vizio VO42L FHDTV10A No Power

Are you sure these are the same physical size - the 3k ones especially look bigger to me.

You are correct. One of the replacement resistors is slightly larger than the original, but I did get the smallest watt rated resistor. Didn't I?

Its going to be a long wait for the slow boat from China...

I really hate ordering stuff from china, but I can't find it any supplier that sells singles in the U.S.

I dont see any mention of new capacitors being ordered or bought or replaced.

I really didn't want to replace them, but I guess I will. I'll be going to the electronics shop later on today to pick them up.

The caps on the board are half rubycon and half KY minus the big blue filter cap that I can't see a manufacturer name on.

I have a question, probably for Retired caps : can we (well obviously not me) yet guess what caused the mosfet/IC/Resistors to blow- if replaced are they likely to blow again...?

I would also like to know the same thing because with my luck they probably will blow again.

[selldoor]

Re: Vizio VO42L FHDTV10A No Power

I am not rating your local electronic shop very highly - I suggest you dont buy any caps until you know what they have. then check them out with gurus on this site before you buy. - You could buy worse than youve got!!

Also if you have trouble finding an item sold as a single it may be that a substitute item may be available eg the mosfet began with ST? ST is the manufacturer code made by St somebody or other (I forget) but a similar item may be manufactured by Fairchild and is probably prefixed FA.
It may also be available with a close attributes 650V or 800V instead of 700V. I dont personally know if that is acceptable but there are people on the forum who could advise.

[retiredcaps]

Re: Vizio VO42L FHDTV10A No Power

I have a question, probably for Retired caps : can we (well obviously not me) yet guess what caused the mosfet/IC/Resistors to blow- if replaced are they likely to blow again and if some of the caps are bad, and not replaced, could that cause the blow?

It could be a number of things.

- power surge
- short circuit in one of the components that is bad
- poor quality components

i.e should the caps be replaced before the mosfet etc are replaced and run?

In the OP's power board picture, all the caps are obscured by those huge heatsinks which lead me to suggest replacing the caps.

Now that we are told that the caps are Rubycon and United Chemi-con KY, they are good quality caps and can be left alone.

Manufacturers routinely change the internals of the TV while keeping the same model number. In fact, in another Philips thread, the power and logic board are COMPLETELY different even thought the model number is identical. So it is possible that some Vizio TVs use good caps (Rubycon, UCC, etc), while others, even the exact same model, may use something like Capxon.

[retiredcaps]

Re: Vizio VO42L FHDTV10A No Power

I would also like to know the same thing because with my luck they probably will blow again.

I don't have a variac so maybe try putting a light bulb in series to prevent things from blowing.

http://www.repairfaq.org/samnew/tvfaq/tvtslbt.htm

[selldoor]

Re: Vizio VO42L FHDTV10A No Power

@ retired caps - thanks - can I ask you to look at first paragraph in post49.
He has bought resistor with different wattage - will it matter?

@xecuter I believe the smallest is 0.125 as mentioned in a previous post and in the link I put in?

[retiredcaps]

Re: Vizio VO42L FHDTV10A No Power

He has bought resistor with different wattage - will it matter?

Sorry, missed that one. Higher wattage should be fine. You don't want to go lower than the original.

In this megathread,

https://www.badcaps.net/forum/showthread.php?t=9343

people with the Samsung 245BW have been replacing their resistors with beefier versions.

[selldoor]

Re: Vizio VO42L FHDTV10A No Power

And more thanks - I'll read it tomorrow looks longer than War & Peace.
As an aside have you come across this site
http://www.diagram.com.ua/english/library/#l5
It is a mixed bag of stuff and the Tv side seems to relate to older European models.
BUT the page I have quoted has down loadable magazines - I downloaded last years
Everyday Practical electronics - didnt take too long. Its seems an eastern bloc site
but I virus checked the downloads i made and it seems ok.

[retiredcaps]

Re: Vizio VO42L FHDTV10A No Power

As an aside have you come across this site
http://www.diagram.com.ua/english/library/#l5

No.

[Xecuter]

Re: Vizio VO42L FHDTV10A No Power

So the mosfet I ordered off ebay which was the stp9nk70zfp finally arrived today. This was the final item I was waiting for since I had already replaced 2 blown resistors and an smd ic. I was able to install it, but I got bittersweet results.

I had pretty high hopes throughout the whole process because if I had been successful in repairing it, it would have only cost me a measly 20 bucks.

It turns out that the tv is now fully functional with the tiny little detail that the actual LCD pane is cracked.

Now my question is; can I purchase another random 42" vizio with a working lcd and swap it with my vizio vo42l?

[tom66]

Re: Vizio VO42L FHDTV10A No Power

Ah, that sucks. Yes it is possible to swap LCD panels, but is it worth your time? And they are quite expensive. If you come across another broken Vizio of the same or similar model, try and repair it as you have succeeded in repairing this one and often simple faults like this are the only problem.

Note, if you look carefully at an LCD when it is off you can see if it is cracked and any leakage between layers appears darker than the rest of the screen.

---

Btw, that TV guy sounded very arrogant and I do not like him. I have spent way less than $1,000/£600 on all my equipment. Probably less than £250 total (and I also design stuff as a hobby, not just repair it.)