Question about Samsung HCM5525W 55" Rear Projection Television

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Replacing the ic's on a samsung hcm5525w. ic's are stuck

In refrence to the stuck ic's. i desoldered all the pins from the ic's and removed the screws. made sure all the pins were desoldered by checking each one. i tried a small screwdriver and a sharp scraper with no success, i inserted needlenose pliers were the screw holes are and tried to pull them off. the ends on the ic's broke and the ic's are still stuck to the aluminum plates.is it possible that the ic's are fried to the aluminum plates?

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The aluminum plate is a heat sink, there should be solder joints to the board on it. Unsolder them and remove the heat sink to make it easier to remove.

Posted on Feb 16, 2009

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Hi, my rear-projection TV (LG 56NZ23RB) initially had problem with convergence. I bought STK ICs, desoldered one and resoldered a newly bought IC. I tested it, but heard a chirping sound and would not...


There are several other components near the Convergence IC's that usually need replacing. These are fuses that look like resistors. There are also some resistors that can go bad also. You may have a solder bridge on some of the pins on the IC too. It's easy since the pins are so close to each other. Shopjimmy. com has repair kits that address your problem

Jan 28, 2014 | Projection Televisions

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When you try to turn the tv on, all you get is a blinking red light, if you unplug for awhile, sometime it will come on.


Symptom: tv turns on, tv clicks once, red light comes on. Then, tv either works for a while, followed by a click, no video, normal sound and flashing red light; or, tv immediately clicks, no video, no sound, red light flashes. If that is the problem, you need to replace the convergence ICs. I had to do this twice. The two convergence ICs are mounted on palm-sized aluminum heat sinks. The heat sinks are soldered to the main circuit board. There are 4 pins soldered to the board for each heat sink, and 18 pins soldered to the board for each IC. Some of the heat sink pins are a bit difficult to desolder. The pins for the ICs are not difficult to desolder, but you must be careful not to overheat them. The heat sink and the IC come out as a unit, after all pins are desoldered. The IC is screwed to the heat sink. The correct replacement IC is a Sanyo STK392-110. I got mine from B&D Enterprises. They were not expensive. The new ICs need to be mounted to the heat sink with a heat transfer paste. I used Arctic Silver from my computer processor heat sink. Installation of the heat sink/IC assembly is a bit tricky, since you have to align all 18 IC pins and the 4 heat sink pins. When all the pins are visible through the holes in the circuit board, resolder everything. The TV should now work. Be sure to replace both ICs. My first repair was done by a technician, who obviously only replaced one. That repair only lasted a couple years, before the problem returned.

Mar 22, 2011 | Toshiba TZ55V61 55" Rear Projection...

1 Answer

How can chang sony tv stk ic


if it is a sony check to see if any of those little green resistors are blown first. most sonys have the stk chips on the main deflection board.they will be next to each other with a big heat sink on each.have a soldering and desoldering iron ready as well as tape and marker for the wires.. remove the wires from the board you dont have to take the board all the way out. start desoldering each pin. if some pins are stuck just touch the pin with the iron. clean the heat sinks.apply themal paste to the new ics. put the new ics through the holes and start soldering. this part can be tricky. put the tip on the pin the solder will flow just quickly remove the solder then the iron 36 times and your done.

Sep 11, 2010 | Hitachi 43FWX20B 43" Rear Projection...

1 Answer

My panasonic pt-53wx52is tripping out and the convergence is all screwed up, i have a video of my tv at http://www.youtube.com/watch?v=t0azkEHH9SY any help is appreciated. I am pretty good with electronics...


Convergience problems usually means you need to replace an IC. IC's are one of the most difficult parts that can be replaced when it comes to tvs. If you find the one that needs to be replaced make sure you take your time and fully desolder the ic before removing it.

Dec 09, 2009 | Projection Televisions

1 Answer

How do you replace ic chips on Panasonic 52 inch hdtv projection?


Most IC's on circuit boards these days are of the surface mount variety. You will need special Desoldering Equipment to remove these chips, especially the one wth 100 or more pins, the type of equipment used in this process heats all sides of the chip at once while a small suction that grabs the chip for removal. Now the SIP chips (Single inline package). chips which usually consists of less then 20pins can be removed with a desoldering gun such as the HAko 880 desoldering gun. Or you can use a standard soldering iron and solder Wick, that can be found at Radio Shack under Soldering Braide).. These procedures are common for all IC replacement. I am asuming you are trying to remove the Convergence IC on this model, The two large Black one labeled STK-392-110, the correct and easy way to remove these is to remove the entire board from the unit and remove the two screws holdinf each one in place, Unsolder the pins of each one and remove the IC, reverse this process to reinstall them. Good soldering technique is critical here as you don't want to bridge pins together causing yourself more problems. Double check your soldering and Double check it again.

Thanks :
Delhielectronics@live.com

Sep 28, 2009 | Panasonic PT-53WX53 53" Rear Projection...

1 Answer

Rain bows


Hello keriro74,

Your convergence amplifiers ICs have become defective, They will have to be changed out. They are usually marked with a STK392-110. You will have to also change out the fusable links connected to the STK392-110. Desolder the pins and unscrew the ICs and remove both of them. Then desolder the fusable liks and replace them with the new ones, then insert the new ICs and solder them in (being careful not to create solder bridges). Then you will have to perform the convergence on your TV, Try to use Auto-Convergence to do this.

I hope this helps

Thank you

Shuttle83

Sep 09, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

How hard to replace ICs?


Remove the 4 screws going through the IC's, unsolder the 18 pins each IC, take a small flat head screw drive place it between the heat sink and IC and pound gently until the IC breaks free, wiggle the IC's to make sure all pins are free and remove them.

Take rubbing alcohol and a Q-tip and clean where you need to resolder. "So you can see the pads better." Put heat sink compound on the heat sink, slide the IC's back in, secure them with the screws, solder the pin's making sure you don't blob pin to pin.

Jul 18, 2008 | Philips 60PP9202 60" Rear Projection...

1 Answer

Saasd


Sorry my browser crashed! I dont know why.. Any ways here are your instructions. Things you need: * Soldering iron with a fine tip and fine solder (rosin core only, never acid core! I used .022 inch) * Flux (if desired, I didn't use any) * Desoldering materials (I used copper braid desoldering wick) * Isopropyl alcohol (preferably 95% or better, for cleaning the board when done) * Thermal grease (normally used for CPU heatsinks, I used Artic Silver) * Masking tape (thin) * Felt-tipped marker * 2x STK------ IC's * Hex-type screwdrivers or bits (I think they are called security bits) * Multimeter for testing the nearby resistors * Digital camera to record your work and help you put things back together I recommend that you read this completely before starting, so that you know what's coming up and can gather anything else you think you might need that I've forgotten or neglected to list here. :) Preparation: 1. Buy two STK ICs. . 2. Practive soldering and desoldering if you haven't done this before or in a long time. 3. Buy good ICs, don't buy generics. For just a few dollars more, you'll get a better part that will last longer. From what I've read, the Sanyo's and Panasonic's are good choices, but there are probably others. Now let's get started! 1. Remove the back cover from the TV (just the electronics cover, not the entire back of the TV!). Remove the black bracket that holds the RCA and other jacks as well as the black plastic bracket that holds the cables out of the way. There are different size screws used here, so keep them labeled or separated in a useful way. 2. The only board you will care about for this repair is the one of the left side. There are a few connections between it and the center board to watch for, though. Slowly begin unhooking cables, labeling each cable and the corresponding plug-in spot on the board. Use the tape and marker. I started at “A” and worked my way up to “X” if I remember correctly, but you could use whatever pattern you like. There are 20+ cables (hence A – X), so take your time and get it right. Take pictures along the way. You will need to unscrew the vertical board at the top left to get further along, and you will eventually need to remove the large plastic “bridge” running above the center of the board. This one has screws at the base in front of and behind it, so it's a little tricky to get out. 3. Pop all of the attachment boards off the mainboard. Press the three clips on the side of the board and pop it out. Carry it to your workbench of choice. 4. Remove the clips that hold the ICs against the heatsink. Desolder the ICs and dispose of them. Since they were already dead, and I was fully committed at this point, I just clipped all of the IC pins with a small pair of diagonal pliers (****) and threw away the old ICs. Then I flipped the board over and desoldered each pin, pushing the remnant down through the hole so it dropped off the board to the bench. I had great luck with the desoldering wick, it sucked the solder right out of the joint and the pins pretty much fell out. Some took a little wiggling, but nothing was too difficult. After all the pins were out, I checked and cleaned the holes with the soldering iron (quickly). 5. Flip the board back over and clean the heatsinks well. Line up the new ICs and make sure that the pins drop into the holes properly. Sometimes they get a little bent from shipping or your own handling, so line them up (gently). Apply a thin layer of thermal grease to the back of the new ICs. I spread mine with a razor blade, something that has worked well for me in the past doing CPU installs in computers. Drop each one into place, then use the clip to secure it against the heatsink. This will allow you to flip the board again and do your soldering without needing anything fancy holding things together. 6. Slowly and carefully solder each pin. A good solder joint should look like a little “Hershey kiss.” Be sure not to run over onto adjacent pins and bridge the joints. I didn't have any trouble here, so I can't comment on how you would fix that. 7. Once you're all done, clean the back of the mainboard with alcohol and a toothbrush to remove and flux or other gunk. Wipe it down and dry it thoroughly. 8. While you're here, you might as well check the resistors. There are several large resistors around the ICs. Grab your multimeter and check their resistance. If you don't know how to read a resistor (it had been a while for me, too), check my Links below for some good charts. 9. Now for the fun part-- put it all back together! Do everything you did to take it apart, but in reverse order. I put a laptop right next to me with my digital pictures on it to help, but you may not have that luxury. Take your time, make a checklist, and work through it. Refer to your pictures along the way to be sure. Try not to bump the CRT guns or the adjustment screws on them while you're working. 10. Once you have it all back together, leave the back off and fire it up. Let it warm up for a bit and then check it out. Make sure you plug things in to the various inputs to see them work. I made the mistake of looking at the menus on screen, thinking all was well, and closing it all up. When I wheeled it back in place and hooked up all of my equipment, I discovered that only my HD input worked, nothing else! I had to open it back up and look around carefully until I found a small cable that wasn't seated properly. Once that was in, it all worked well. 11. Don't be disturbed if the convergence is still off, it just needs to be adjusted (and it can be now). After a good long warm-up with plenty of bright colors, select the convergence menu. I reset mine back to factory defaults, then went through the multipoint convergence for both red and blue and lined things up again. You really should have the TV warmed up well, or the convergence will just drift off once it does get there.

Jul 11, 2008 | Sony KP-51WS500 51" Rear Projection...

2 Answers

Okay, I removed the circuit board with ease and was ready to operate and all the sudden I was stuck. The stk is attached to what looks to be a mine radiator and I have no access to clip the bottom of the...


use solder wick or a desoldering iron from radio shack which will **** up the solder so you easially remove the IC. Radio shack has a in-expensive desoldering iron with a rubber bulb which makes this easy.

Mar 28, 2008 | Projection Televisions

1 Answer

Hitachi 53uwx10ba rear pro


Set needs convergence ic's changed (STK392-110). Also look for resistors slightly discolored around STKs, usually low value like 1.5 ohm, 2.7 and 3.3 If you have an ohm meter and a soldering iron, solder and solder wick, you can attempt this yourself. Remove rear cover of set. Mark and unplug connectors from convergence board, including small jumpers that interconnect boards. Remove board, turn over and unsolder pins of conv. ic's using solder wick. Unscrew mounting screws and pull chips out. Careful, white heatsink compound is messy. Apply new compound to new chips if needed, making sure not to bend small pins. Slide chips in and screw in mounting screws. Flip board and solder in ic's making sure all pins came through. Check for small resistors around ic's being discolored,(usually 1.5 ohm) These are critical and a few tenths of an ohm change will cause extra alignments needed. Replug and secure board. Double check that all connectors are in place and power up unit. If you changed any mechanical adjustments to tubes or lenses, change them back now and try auto convergence. Service adjustment procedures are avail. online if needed. Good luck!

Mar 01, 2008 | Hitachi 50UX57B 50" Rear Projection...

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