Question about JVC LT-32X776 Television

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The picture of the circuit board shows only about 1/12 of it. But thats bassicly what the rest of it looks like. It says caution high voltage next to the recepticals where the screen plugs into the board. Does anyone know what the name of this part is? It connects the main pwr board to the lcd display. It belongs to a jvc lt-32x776 Telivision. Help me!

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6ya6ya
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Posted on Jan 02, 2017

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  • 105 Answers

SOURCE: JVC LT 42x688 no picture just sound

Sorry, this has no easy fix. The good news is you do not need an LCD Panel. The bad news is the Video Processor has a problem.
This TV has x3 Boards. The one you should replace first is the one in the middle. If this doesn't fix it, try the one on the right. The Part #s are on the Boards if you wanna try ebay.

Posted on May 06, 2009

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  • 105 Answers

SOURCE: I have a JVC LCD

You need an Analog Board. It is the one in the middle. You can find it on ebay for $50 I think.

Posted on May 21, 2009

  • 1 Answer

SOURCE: JVC LCD TV LT-42X688-powers on, blank screen. no picture,no sound

Hi , I have the same problem with my LT-42X688,so i called the service of my extended warranty provider . the TV technician just left and told me the motherboard is the problem. he said its the third one this week he has seen with the same symptoms. he ordered the motherboard and i've got to wait 5 to 7 work days before the part will be in . I will keep you posted when the guy will return.

Posted on Jul 21, 2009

budmrtn
  • 11361 Answers

SOURCE: JVC LCD have sound no picture

it can be either the backlight inverter board or the power supply module is not supply 24vdc to the inverter board.

Posted on Oct 31, 2009

  • 11800 Answers

SOURCE: Looking for main ic chip

Sorry, separate processor chips aren't available, for the simple reason that you can't unsolder the old one without doing a lot of damage to the mainboard - there are over 100 pins on it and it's an SMD device, that will make the unsoldering operation practically impossible.
Either replace the entire mainboard or the tv is dead.

Posted on Oct 19, 2010

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Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board

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A careful visual inspection is the way to start. Examine the circuit board(s) carefully for cracks. This may require removal of the board & a magnifying glass. Inspect the connectors where wires enter the board, & pay careful attention to the areas around heavy components. Any cracks found must be soldered where they cross the copper traces on the board. The green coating (solder mask) must be scraped off prior to soldering. Most likely the damage is confined to board cracks, as most solid state components are pretty rugged & not subject to impact damage. Use extreme caution around the high voltage area, as the set may retain high voltage even when off & unplugged. The high voltage area is that around the thick wire that goes to the suction cup on the picture tube itself. If you are not comfortable doing on-board repairs, call a qualified technician to do the repairs.

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Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board.

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Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board.

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Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board.

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This is possible typical when the set has a failure of the main power board .This can be a related dry soldering problem there is a high possibility that the components over a period of heating and cooling , tend to bring upon dry soldering. So my advice is to check the set for some loose joints that have played on to give you a loss of picture.

Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.

Look for mian board components that are burnt or capacitors blown.

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Those are hard to find for a mother board unless you know the model number and manufacturer, then you can try going to there web site and downloading it. It all bassically the same except when it comes to the little black Pins you have to plug in for the power switch and the HDD light and the USB ports. Look closely on the board, sometimes there labeled ( PWR SWCH = Power switch, HDD = Hard drive Light in front of case, REST SWTC = reset switch, + and - for the USB pins, generally solid black is Positive.) Now this is relative but not exact, some boards abbreviate or show them differently on the bopard, but look for a group of metal pins sticking up and see if they say what your looking for.

You can try guessing till you get it right, but it takes a while, it shouldnt hurt the board if you wire it wrong, now a days they are built with protection devices to keep you from fryinh anything, but still excersize caution. Everything else on the board is easy, most ribbons and connectors only fit where there supposed to go.

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Can u help me


You have a problem with the STK convergence modules. They're on the center circuit board attached to an aluminum heat sink that's about 8" long and 6" tall. You may be able to recreate the problem (hour glass effect) by gently moving the heat sink (which the modules are connected to). This gives the hour glass effect on the picture and the advanced convergence screen. This is an indication that the modules pins aren't solidly connected (meaning soldered) properly. Remove the circuit board and clean the old solder off & resolder the modules pins to the circuit board reconnected the board and then retest by again pushing on the heat sink. The "factory" job was good enough for 3-4 years but the heat (and these modules do create a lot of heat) and stress created from repeated use eventually takes it's toll, weakens the pin connections and our problem occurs. take the appropriate cautions working around the high voltage of the set & use a non-conducting piece of wood to push the heat sink when doing tests.
If soldering doesn't help, then the modules have died and need replacing. Don't buy the $10 cheap ones. Most of them have an upgraded version that is stronger. Also look for any burned resistors in the vicinity of the modules.
Best of luck, hope ya fix it.

Feb 07, 2008 | Hitachi 50UX57B 50" Rear Projection...

1 Answer

What is wrong with my tv


You have a problem with the STK convergence modules. They're on the center circuit board attached to an aluminum heat sink that's about 8" long and 6" tall. You may be able to recreate the problem (hour glass effect) by gently moving the heat sink (which the modules are connected to). This gives the hour glass effect on the picture and the advanced convergence screen. This is an indication that the modules pins aren't solidly connected (meaning soldered) properly. Remove the circuit board and clean the old solder off & resolder the modules pins to the circuit board reconnected the board and then retest by again pushing on the heat sink. The "factory" job was good enough for 3-4 years but the heat (and these modules do create a lot of heat) and stress created from repeated use eventually takes it's toll, weakens the pin connections and our problem occurs. take the appropriate cautions working around the high voltage of the set & use a non-conducting piece of wood to push the heat sink when doing tests.
If soldering doesn't help, then the modules have died and need replacing. Don't buy the $10 cheap ones. Most of them have an upgraded version that is stronger. Also look for any burned resistors in the vicinity of the modules.
Best of luck, hope ya fix it.

Feb 07, 2008 | Hitachi 50UX57B 50" Rear Projection...

1 Answer

Vertical lines only


You need to re-solder the circuit board that contains the STK convergence modules. They're on the center circuit board attached to an aluminum heat sink that's about 8" long and 6" tall, about dead center in the circuit board. You may be able to recreate the problem (hour glass effect) by gently moving the heat sink (which the modules are connected to). This gives the hour glass effect on the picture and the advanced convergence screen. This is an indication that the modules pins aren't solidly connected (meaning soldered) properly. Remove the circuit board and clean the old solder off & resolder the modules pins to the circuit board reconnected the board and then retest by again pushing on the heat sink. This is a caused by a minimum effort (a.k.a. minimum cost) solder job, probably done in some 3rd world sweat shop. The "factory" job was good enough for 3-4 years but the heat (and these modules do create a lot of heat) and stress created from repeated use eventually takes it's toll, weakens the pin connections and our problem occurs. take the appropriate cautions working around the high voltage of the set & use a non-conduting piece of wood to push the heat sink when we doing tests.
Best of luck, hope ya fix it.

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