I attempted a repair on my pt-53tw53 by replacing the 110 ic chip ( the one on the diagonal heat sink) but, I think I did a bad job of soldering. When I tested the set when turning the power on the set begins its normal powering on with two click accompanies by a "static" sound then clicks off, no picture begins to come on, and the power light intermitently flashes three time. I tried powering on twice with the same results. Ive heard that this means a convergence chips is shot, which it is, if I damaged any of the holes for the connections of the 18 pins for the IC chip to the circuit board is this game over or can I fix the circuit board connections. It looks like some of the green "enamel" flaked off near the pin holes connection and there is a little bit of browning from the soldering iron, I dont mind if the fix is labor intensive, I'd like to remove the circuit board form the tv entirely and work in a more controled environment. Could you advise on 1) the circuit board connection fixes 2) removing the enitire circuit board from the tv for the circuit board fix Thanks, matt

Hi


Thanks for using FixYa. The issue is with the failed convergence (STK) ICs which needs to be replaced. It’s not a difficult job if you want to do this yourself, you should require some basic knowledge about soldering-resoldering components. To start with you’ll have to open the back of the unit and then replace the ICs (STK ICs) which are located behind the black heat sink and also check the resistors as if they are short the ICs might blow again after sometime. There are repair kits available which includes repair instructions with the parts, if you want to do it yourself, you can buy and repair it yourself.Please do rate the solution if the issue is resolved or post a comment for further assistance.


Thanks
Rylee

Hi,
Power light blink 3 times shows that convergence out ICs got defective and need to be replaced.
If you are handy with electronics stuff repair and can solder parts in circuit board with proper tools then replace two big black ICs, convergence out, mounted on aluminum heat sink.
Or call local tech to fix it.
Let me know if you have additional question.
Thanks.

The three blinks indicates a convergence IC fault. The convergence ICs must be replaced with the manufacturer replacement part. Use only the original replacement part. Your set uses STK392-110 convergence ICs.
These ICs are mounted on a large heat sink. Yes, you can replace it yourself and save few hundred bucks. But you must be knowledgeable enough on how to solder, resolder and use a multimeter.
You will need:

1. Convergence ICs
2. Heat sink grease or thermal compound
3. Soldering iron
4. Solder lead.
5. Digital multimeter
6. Solder pump
7. Small side cutter

Feel free to inform me if you decide to replace the ICs yourself

It could be either a bad connection or a bad new chip--why did you go to 180 chip? The best replacement for the 110 chip this set used is a 150 chip. Keep in mind whatever chip you use they will only last 5-8 years---the problem is not the chip but the heat sink compound grease dries out from heat and whatever chip is in there is going to fail.

If you need further advice consult me--I have fixed hundreds of these sets--replacing with the original STK-392-110 you should get 5-8 years. If you got a new chip that is flakey you are going to have to replace both again to see if it is your problem

Let me know if you need help.

If this helped you, rate this solution as I do this here for FREE.

SD TECH

if 3d looking it is a convergence problem--this model should use 2 of the STK-392-110 CONVERGENCE CHIPS---both and any bad resistors around them need to be replaced and the set adjusted.

Can you do this repair yourself if I tell you what is involved?

You can buy a pair of the chips for about 12 dollars plus shipping on Ebay---it does involve being able to get at them and soldering(each chip has 18 pins..)


Let me know if you think you can do it and I will tell you how to proceed--if you cannot do it I can tell you what to do to get it fixed--it is a fairly easy repair on the set you have.....

I am here to help and if you have any questions or need advice reply to this posting here and I will assist you.

REGARDS, SD TECH

Its failure of 2 convergence out ICs and requires replacement.
You can replace these ICs if you have basic electronics knowledge and good soldering experience. let me know to provide you more info about parts.

Be aware:-
There is electric shock risk involve in TV repair.
You should have strong electronics repair knowledge / experience and good soldering skills. Repair your TV at your own risk.

Mostly 3 blinks in this model shows convergence out ICs failure and you need to replace STK 392-110

Its big black IC and TV has 2 mounted on silver heat sink at main board.

HERE is a pictorial web link and you will see how you can replace these ICs.

STK392-110 are available in Part Store.

Good luck.

It looks more like an open solder because you were able to align it properly after replacing the STK ICs, if there was an open resistor(s) you would not be able to get it align.
I would suggest to go back and double check the solder joints on the STK ICs as well add some fresh solder to the resistors nearby the stk392-180.
Good Luck.

Cheap IC's = open resistor
Replace with X 480293 Kit Use IC's from kit to save $$.......T.

My TV too got a "bow" at the bottom of the screen. Seem like many suggested replacing this STK chip and also it's $10/each so I went ahead buy 2 to replace the 2 in my TV.

Below is a pic of the inside of my projector TV with the STK-392-110 circled in green and as you can see it is easy to ID due to the HUGE heat sink that it mount on to help dissipate the heat. (sorry for the small size since Fixya limit the file size to 150KB)



I unplugged the TV for more then 3 days and that seem to discharged most of the components.

So here are the steps I take to do the fixing.
1) Before I even order the chip I open it up to verify the part number and it was STK-392-110. Did many research try to find as much as I could about this chip and make sure I order the correct one... so I made the order. While waiting for the product, the TV had been unplug ever since.

2) Well, in order to even get to the inside I need to dismount the back panel. So it had stayed open ever since, of cause out of reach of children.

3) The components arrived and I prepared:
- soldering iron
- solder
- heat sink compound (used mainly to fill in a good gap for CPU heatsink inside computer)
- and solder sucker (the sucker later I found to be useless).
- Flashlights
- Screw driver
- Plier.

O, and my brother offer his help which I found to be very useful. My 2 hands weren't enough to do this work.

4) Removed the 4 screws which I marked with the yellow arrow inside the pic.

5) I didn't want to remove any cable afraid that it might create other problems but had to remove about 3 cables to make it easier to lift and move the board around a little while fixing.

6) Removed 4 screws that mount the chip to it's heat sink using a very short screwdriver. Very little space to work with.

7) It was extremely hard to remove the old chip with the board still cabled to the TV. Many times I was tempted to disconnect all the cables. What prevent me from doing so was I couldn't think of a good way to document all the cables that I disconnect and there are just too many (IMO). I did take many pics just in case.
Anyway, what I did might not be the best way but it worked. I tip the chip back and forth to weaken the pins to a point that it broke. It took forever but it did work. After the chip broke off that I can desolder and remove each pin with the plier. Again with the little space to work with that made me want to remove it from the TV. The pins holes were still very messy and full of solder. My brother came up with a way to clean the hole using stripped wires. When the stranded strip wires touch the liquid solder, it help suck the solder out of the hole. I'm sure there are better ways to clean the holes.

8) We had a little hard time putting the new chip in b/c a few pins bended a little and not align with the holes on board. And when added the compound to the chip, it made it even harder since now the chip need to stay away from the heat sink or else it'll stick to the heatsink. Finally we got the new chip in the holes on the PCB with the compound and all, so it just a matter of screwing the chip onto this heat sink.
9) Turn on TV and pic is 99% perfect again. Why not 100% U might ask.. b/c I saw a tiny out of align colors on the left of the screen. Not very noticeable but I can see it when I pay close attention.

Cost for the two chips were $20 included shipping. Hey, it's a lot cheaper then buy new TV and only 2 chips trashed instead of the entire TV. Anyway, I think I knew which chip went bad. Because one chip had hardly any of the compound. This compound help the transfer of heat to the heat sink.

Hope this help someone.