Question about Mitsubishi WT-46809 46" Rear Projection Television

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Thanks for your help with the Mitsubishi WT 46809 but, there is more:

How do I know where and what it looks like and goes inside the TV: Solution==replace fuse(s) and STK I.C.(s).

 

Thanks,

Matt

Posted by Matt Kwasiborski on

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Fuses and IC's are soldered in on large PC board in center of chassis....
Your model is a tight fit that is usually repaired by chassis pull first, then
board repair, normally by a skilled Mits tech........

Posted on Nov 04, 2007

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Hello, my Kp-48ks1 projector for many years, has a problem. looks as if 3D? double image, only at the top of the TV! Thanks


Replace both of the Convergence ICs, they are Big Black ICs and will have PN# on them.
STK392-110 ,also check the pico fuses in front and back of ICs they will look like resistors only they are Green or Yellow 5amp, 6amp,7mp fuses.
Mats Electronics has ICs and supplys 1-800-628-1118
STK 392-110 cost $9.95 each

Jan 11, 2011 | Sony KP-48PS1 TV

1 Answer

We have a Sony 57 " projection TV with the convergence problem you described. Can you tell where to locate the parts inside the TV and do I need anything else other then the stk 392-560. Can I use a...


Mats Electronics 1-800-628-1118
Make ure you CK pico Fuse around the STK ICs,
They are Yellow or Green and look like resistors but are Fuses 6amp 7amp 5amp,ect..

Oct 05, 2010 | Sony KP-51WS500 51" Rear Projection...

2 Answers

There is a blue color shift to the right making people look like they have a blue shadow. Thanks. Matt.


it is a convergence failure
you need new stk chips to fix
this is complicated and requires soldering
typical cost 150 to 300

if you are crafty i can give you ideas on how to improve the picture without repairing but you will have to reach near high voltage lines, let me know if you feel so inclined

May 21, 2010 | Televison & Video

1 Answer

Hi. i have a 54 inch samsung rear projection tv. 2 years ago something happend within the tv and the picture was doubled. and there were red lines going through the tv. i had sears come out today and look...


Hi,
This sounds like the most common thing that fails on projection TV's, regardless of the brand. The convergence circuit has two, or sometimes three STK IC chips mounted on heat sinks to drive the convergence yokes. They typically last anywhere from 5-10 years, then they fail.

It sounds like in your case, the solder joints on the bottom of one of these chips may be failing and some fresh solder will make it go for a while. I would recommend you to replace both the STK chips.
These ICs are used to align and keep aligned the three colors on the screen...

INSTRUCTION TO REPLACE CONVERGENCE ICs:

The parts you will need are two ic's that are referred to as STK ic's. This is in reference to the first three letters of the part number. You will also need some pico fuses. The pico fuses are little yellow fuses that look like resistors. When they blow, they will show no physical sign of failure. The amperage rating will be printed on the fuse. For example a 5 amp fuse will have the number 5000 on it. A 3.15 amp fuse will have the number 3150 on it. You will need to use an ohm meter to test these fuses

The stk ic's are on the "D" board, attached to large heat sinks, When looking from the back you can see the heat sinks but the part's themselves will be pointing away from you and hard to see without removing the board, or using a mirror to look at the part numbers. The fuses are generally located under the fins of the heat sinks. There are several of them and vary by model. On the "G" board there will be two yellow pico fuses near the connector going to "D" board. These fuses provide power to the stk ic's you must check these as well.

When replacing the STKs make sure you use heat sink compound on the back of the ic's before installing them. Also as a rule of thumb, screw or clamp the ic's down to their heat sinks before you solder the pins. Replace any blown pico fuses and re- install your boards. When you turn your set on it may still be out of convergence due to many factors. Try pressing the auto focus button on front of your set.

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Rnj VINODKUMAR

Nov 11, 2009 | Samsung Televison & Video

1 Answer

Need to replace parts due to a convergance problem. I have a pasaonic pt53wx54j tv. want to know if i can do this by myself. thanks for your help!


You can if you know How to solder, Call Mats for Parts 1-800-628-1118 Look on Your STK ICs go by the number on them example STK392-110 STKs are big black ICs will have STK on them!

Oct 01, 2009 | Televison & Video

1 Answer

HITACHI 50DX01B IT SHUT OFF AND WON'T POWER BACK ON


Yours is not a fuse problem replace Both of your STK ICs they are big black ics will have part number on them If they are 392-110s use 180s.Also 6 resistors to replace with them RK42-46-50-54-58-62.

Feb 16, 2009 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Casias.com does not exist


Your STK parts might not be your problem for blinking red led. As I have read throughout other forums, the first think to address is your power deflection board .....that's the first one that goes. If it is the first time, it might be that only a couple of fuses on that board go bad, I had the same problem with mine, as I remember correctly, F850 and F852 were bad....I replaced mine and had tv for 12 months when a storm caused the whole power to go on and off a few times and screwed up my set and now more parts on power board are messed up. I'll replace mine in totality.
Convergence STK's will tell you when they go bad because you will notice something with your picture right before they give in. But in your case, you can't turn your set on.
Try to put your hands on info that tells you about codes on that blinking light. I tried to find that kind of info but I didn't try hard enough. I wish I have it, it could save me a ton of headache.
Hope this helped.
Nic

Aug 03, 2008 | Toshiba 65H81 65" Rear Projection...

1 Answer

Samsung hc-p4241w problem


Look for 2 Big black chips they will be together on convergence broad STK-392-110s,120s replace both ics.Use STK-392-180s

Mar 29, 2008 | Samsung HC-P4241W 42" Rear Projection...

3 Answers

Pioneer 610HD Rear Projection


Check all solder joints on the deflection board.

Dec 10, 2007 | Pioneer SD-582HD5 58" Rear Projection...

1 Answer

Washed out Color's and No Internal TV Menu's


replace the stk ics. they are located inside the tv with lage heat sinks. i do believe sony runs stk392-510. youll have to look at the ics to know which ones for sure.

May 20, 2007 | Sony KP-61V90 61" Rear Projection...

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