In replacing the two STK-192-150 chips, I need to remove the board. I am concerned about the 4 white interboard connectors along the left side of the board. Can you just pull up the board?

MOST LIKELY, if convergence will not adjust in some part of the screen and or is bowed looking:

You need to locate the two convergence chips (usually STK-392-020 OR -040 THAT this set should use.

Most of these smaller Samsung sets they are located on a small circuit board mounted above the main boards--see photo of typical chip---should be two side by side.

If they are not located on that separate board, it will be much harder to remove/ replace them.

If the photo or this information helped you rate this solution as very helpful as I do this here for free.

SD TECH






THIS IS A TYPICAL CONVERGENCE CHIP--YOURS WILL HAVE A DIFFERENT NUMBER LIKE STK-392-040 OR -020.


TOTAL PARTS COST ON EBAY WOULD BE UNDER 20 DOLLARS.

If you have a HItachi 43fdx15B and the convergence is bowed----look in the customer menu and see if it will adjust---if Blue is skewed and will not move here is what is wrong.

The model you indicated is a 2002 model and uses two of the STK-392-120 CONVERGENCE chips----both along with any bad resistors around them need to be replaced---the resistors are easy to see and or check.

The reason this happens is the chips are 2 1/2 inches wide by 1 1/2 inches tall and black in color---18 pins each.

The back of each chip is metal--a white grease called heat sink compound is applied to each when they are installed and bolted to the large metal heat sink with fins. After some years the grease dries out and one of the chips cannot move the heat fast enough and it goes.

This is a fairly easy set to do this repair on----if you remove the back cover (unplug set first) and from the back of the set on the far right side you will see a circuit board about 5 inches wide and 12 inches long--the chips are on the far right side and will have the STK-392-120 printed on them in white letters.

The resistors are to the left and behind the chips---the blue resistors will be near the back edge of the board--all will have location numbers printed on top of the board under them, like RK56 etc.---any resistor that is somewhat discolored will be bad--they can all be tested just like testing a fuse.

That board comes out very easy---3 screws and a number of plugs---you need to mark the 3 identical plugs near the resistors--usually they will have felt pen markings of red, green, blue---red towards the front and blue towards the back with green in the middle---they are the convergence yoke plugs.

Considering that you can buy a pair of the chips for less than 14 dollars on Ebay (I can tell you the seller) if you or someone you know can solder and replace them, I can tell you everything you will need to do this repair----you can save the set and a lot of money--most shops get 300 for this kind of repair.

If you get someone else to fix it--MAKE SURE THEY REPLACE BOTH CHIPS--some clowns will just change one and the set is going to have the same problem again in a few months---once the chips and any bad resistors are replaced the set will not have this problem again for 5-8 years---lifespan on the parts.

Let me know if you want more details or information---I am here to help people---this is a fairly easy repair on this model----I know, I have done hundreds of them in the last 8 years.


SD TECH

Ok, I am going to give you basic instructions--if you think you can do it give me a vote here and I will give you as detailed instructions as I can--


Before we get into step by step instructions let me tell you what you will need:

This model uses two of the STK-392-150 CONVERGENCE CHIPS--You can use them or if you want to spend a little less you can use two of the STK-392-110 CHIPS--they are the same but the 150 chips last longer.

You can buy a pair of the chips (you have to change both chips) on Ebay for less than 12 dollars plus shipping--I can direct you to the seller I buy from.

You need a good soldering iron.
Solder
a desoldering braid(radio shack sells this-for removing solder)
some liquid solder flux (makes it easy to unsolder and then solder new chips in)
YOU do need an Original Sony remote to adjust the set after you finish--almost any sony remote will work for this if made for a set in the last ten years

If you unplug the set and remove the back cover look at the board near the left side of the set--usually both chips are there--they are on heat sinks made of metal with fins---some models have them on the right side.

with a mirror you can look at them--the chips are 2 1/2 inches wide and 1 1/2 inches tall(BLACK IN COLOR) and will have the STK-392-150 printed on them in white letters.

Usually you just need to replace both chips and adjust the set--sometimes there will be a bad resistor or fuse bad also--I can tell you what to look for.

If they are on the left board you need to remove several screws to unplug the board and lift it up so the bottom faces the back of the set--some of the plugs are not marked so you need to make a diagram and mark all of them so you get them back in the right place when you are done

Total parts cost should be under 20 dollars---I have repaired hundreds of these sets.

You have to be careful when you remove the solder on the chips (about 18 pins on each of them) that you do not damage the copper foil where they are soldered in.

I will give you more step by step instructions if you think you can do it--when I help people here I always follow up if they have problems and or need more help--This also involves some simple things--when you replace the chips--the back of each is metal--they fail because a white grease is applied to each to transfer heat from the chip to the metal--when you replace them--YOU MUST APPLY heat sink compound(a white grease made to move heat) to each of them.

Let me know if you can do this and I will step you through it--and tell you site to buy the chips at a very good price--it is the place I buy mine.

I am here to help people


Regards, SD TECH

1.) This sounds like a convergence problem--with the original remote go into the customer menu and select convergence--see if red or blue will not move in some direction.

2.) If some color (red or blue) will not move in some direction--you need to replace both of the STK-392-120 CONVERGENCE IC'S THAT THIS SET USES along with any of the green 6.8 ohm resistors around them that are discolored(bad).

3.) With the back cover removed the chips are on the left large board on two metal heat sinks with fins--they are black and about 2 1/2 inches wide and 1 1/2 inches tall and the STK-392-120 is printed on the face of them in white. The resistors are in front of the one near to the front of the circuit board and left to right around several plugs there(convergence yokes).

4.) You can buy both chips on Ebay for about 13 dollars plus shipping; If you are able to do this repair you can save a lot of money---after the chips and or resistors are replaced you need to go into the Convergence Tech mode(I can tell you how to access it) and adjust the convergence in first the regular non Hd and then in the Hd.

5.) Most shops TRY to charge 300-400 for this kind of repair--I have done hundreds of them here for 200-250.

6.) If you are not able to do this repair shop around your area for someone who can do it---if a shop says "It has to go to the shop" keep looking----any good tech can do this repair in your home in about 1 hour.

7.) If you have any questions or need advice reply to this posting.

I do this here for free so if this information has been helpful please take a minute and give me a vote here-----I am here to help people.

Regards, SD TECH

Go into the customer menu with the remote and look for "convergence" if the red or blue will not adjust in some direction you have a bad convergence chip. This set uses 2 STK-392-120 chips---both need to be replaced along with any of the 6.8 ohm resistors around them that are bad--a bad resistor will be discolored or white in the middle.

With the back cover off the chips are located on two metal heat sinks on the large board on the left side (as you look from the back) and both will have the STK-392-120 number printed on them in white--the chips are black in color.

Most of the time you just need to replace both chips and adjust the set with the remote control. You can buy both chips for about 13 dollars on Ebay--if you can do this repair yourself you will save a lot of money!

Most shops charge 300-400 for this kind of repair---I do lots of them here for 200-250 including parts, labor and house call. Now is the slow time of year for TV repair shops--shop around--if they say "it has to go to shop" keep looking; any good tech can do this repair in your home and it usually takes about an hour.

I do not know how much skill you have but if you need instructions I will help you. This problem happens for a simple reason--the chips are about 2 inches wide and 1 1/2 inches tall with 18 pins each--the back of each is metal and a white grease is applied to each to transfer heat quickly to the metal that they are bolted to. After some years the grease dries out from the heat and one of the chips cannot move the heat fast enough and it fails.

IF YOU HAVE ANY QUESTIONS OR NEED HELP CONTACT ME BY REPLYING TO THIS POST.

I DO THIS here for free so if this has helped you take a minute and give me a vote here.

SD TECH

Bad capacitors. They're cheap. Look for the ones closest to where the power cord comes in to the main pcb board. This will be your power supply circuit. Change them! They're probably dried out. If they're bubbled up, they're also bad. They're so cheap though, just replace them all.

Enter the tip of a pointed knife between the left side edges of the connector (circled in black in the attached pic) and gently tilt the knife away from the connector. Do the same on the right side. The connector should pop up.

Very carefully thats how you remove broad.I use STK392-180s ,and after you replace these parts you have to realine covergence ,you must then have service setup code for teachician and the remote control that came with tv if you dont you will not be able to set convergence.

Check all solder joints on the deflection board.

Just put something under the connector (like a screwdriver)and lift up....they are very sturdy and I have never had one break for me.