Question about JVC AV-56WP74 56" Rear Projection HDTV-Ready Television

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Changing IC's When I was Changing The Ic's in the convergence board I think i may have ruined the board when I was desoldering. The pad where the pin of the IC makes contact on the bottom came off with the solder. Any Solutions? or anywhere I can Get a new Board?

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Re: Changing IC's

You have to take a thin piece of wire and solder it from the leg of the ic that it was suppose to be connected too and follow the trace and find where theres a good connection where you can solder it too or scratch the trace and solder it to the new area on the trace.

Posted on Jan 15, 2008

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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...

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I have a mitsubishi vs-4541/4542 tv with sound and no picture. What are my options?

I have not repaired this particular model. If this TV is a projection set,you have one of two possible problems. First....You may have convergence IC that has lost a ground contact to the signal board. We are discussing the board that has all your RCA connections and RF connectors. You may have to replace, possibly a STK-XXX series convergence IC. One or two capacitors near this IC, usually a bad cap will end the life of an IC and resistors. And replace a couple of resistors, these are standing tall next to the convergence IC. The next problem could be on the power supply. The power supply will almost always have the flyback transformer on it. If you can locate the vertical IC..This IC may need resoldering. You will see rings around the pins of the vertical IC. Replace the three or four capacitors next to the IC. A bad capacitor will overheat an IC and cause solder grounds to separate. Thanks for asking and show a few hands of support!

Dec 09, 2010 | Mitsubishi Projection Televisions

1 Answer

JVC AV-48WP30 convergence drifting after IC replacement

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

Convergence problems are very common on all Projection TV sets including Sony,Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit wiith instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms
  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted or warped
  • No Audio/Video - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV may have one or more of the following symptoms....
  • Dull looking picture
  • White looking picture
  • Halos around objects
  • Red/Orange looking picture

You can see some more examples and find a fix here

Mar 16, 2010 | JVC AV-48WP30 48" Rear Projection...

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Green out-lines on tv images mitsubishi wt-42313

Iff it's more or less like a green shadow to the picture,then you have a convergence IC issue. This is 99% of the shadow problems.

Look in the back of the set for a 40-60 pin IC chip about this big

There will be two of them with a part number on the front of them. You should replace BOTH at the same time otherwise you may have to shortly replace it again. Replace both,save yourself time and money.

If you think you can do this yourself then you will need a soldering iron and desoldering braid.

Nov 01, 2009 | Mitsubishi WT-42311 42" Rear Projection...

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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 :

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

1 Answer

Sony 57" dlp TV CONVERGENCE problem

You have to pull the chasis completly out the set. Make sure you know where all the wires go that u have to unplug. Also u may need to change open resistors near the convergence amplifiers.

Apr 23, 2009 | Projection Televisions

1 Answer

Red Convergence Problem

Convergence IC is faulty. The convergence ICs are available at this link . Is the board you found guaranteed to be good? Changing ICs isnt difficult if you have some solder experience A new IC costs between 6 and 15 dollars at the link I provided.

Jan 05, 2008 | Sony Grand WEGA KDP-57WS550 57" Rear...

2 Answers

Philips 60pp9202 sound but no picture

Sorry no pic, but if you look from back of set on deflection board(board with HV transfromer)big part with about 4 wires coming out going to your picture tubes. Looking close to leftside of board the last IC with heatsink shield standing up has a small 7 pin ic if looking on it you should see TDA8177 or something to that affect. This is the verticle IC. Since you have found the IC's (convergence) then the only thing left is to look for open fuses like 1300, 2004, 1900 etc and see if open. Concerning cost if you buy from these part are inexpensive so it wouldn't hurt to buy all. Rule of thumb, if set has color problem then Convergence IC, if no problem just went out one day while playing fine then Vertical, then the alternative if no sound the audio area, which is not common for this set. Hope this helps!

Sep 03, 2007 | Philips 60PP9202 60" Rear Projection...

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Converge semicoductor

with skill and experience. need solder wick or solder sucker(radio shack) screwdriver set, needle nose pliar, solder and solder iron 35 40 watts. desolder the IC all legs on bottom of pc board. pull the ic out with needle nose, install new ic ,u might have to bend and straighten the legs, dont force it. now solder all the legs carefully. GGGGGOOODDDD LUCK!

Aug 15, 2007 | Toshiba 42H82 42" Rear Projection...

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