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Resolder vertical ic

Thanx but i need a bit more info. I'm confident with a soldering iron but need to know what to solder in laymen terms

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  • Billsno1 Aug 14, 2008

    Model is a Panasonic TX 32 PL10 100HZ.

    I removed back to have a look and discovered picture returned to normal if mainboard was lifted slightly, but returned to half screen when put back.

    Could this just be a solder fault on the board?



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Please provide me model number Tv and brand. I will help you Thank you

Posted on Aug 13, 2008

  • Noe Z  Bernabe
    Noe Z Bernabe Aug 13, 2008

    Model number please?. Located back cover TV. Thank you

  • Noe Z  Bernabe
    Noe Z Bernabe Aug 14, 2008

    I tell you what, could you take picture chassis ( close to fly back/) I will make red point for find the place. Thank you



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1999 Panasonic CT-3269SW No picture; just a colorful horizontal line through the center of the screen... tilting & tapping used to pop the picture back. No longer responds to this method; just stuck...

Sir the problem of your unit is the thermal intermittent caused by cold solder or dry joints in the solder part of your unit specially the vertical section of your tv.

It is much better if you use a magnifying glass to determine the cold solder joint or dry joints. To fix this just resolder this cold solder using a soldering iron, soldering lead, desoldering pump, Note be sure not to connect separated pin if accidentally connected may caused much damage to the unit hope this help good day and best regards.

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Vertical deflection that would be fixed by banging the TV. Now banging doesn't fix it. Is this a solder problem? Can I resolder and if so, what would I be looking for? Thanks, Steve

There is some loose solder terminals at the vertical output section ot your TV. Just open the TV, locate the vertical output section. There is an IC in the vertical output section, usually screwed on to a metal heatsink to radiate heat away from it while it works. The solder terminals to this IC should be noted for any loose solder points. It is a common fault to most of the CRT based TVs, regardless of brand and model.
Look at the solder terminals of this IC for any loose solderings. This loose may happen, because, this IC will heatup while working, and repeted heating and cooling may make solder points to the terminals of this IC, will cause the fault you reports here.
It will be very difficult to detect these loose solder points, as some of them may be so microscopic to detect. So do what we do on service table. Just resolder most of the suspected solder terminals of that vertical section, including all solder terminals of the vertical output IC and related parts, by applying a little more solder, without making any solder bridge short in between adjecent solder terminals. This mut solve the proble of your tV.
Please adjust with my language, as I'm not an English. My mother toungue is entirely differet to that of English. I only try to exchange my ideas and experience to you. OK.

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52 inch mitsubishi rear projection TV (4 years old) starts to flicker after about an hour of use. Kind of flickers from color to black and white very fast ans steady. Every time, the first 45 minutes to...

There is some loose solderings on the chroma board of your TV. This is a normal fault to all kinds of TVs. Some components, like resistors, will heat up during working. Repeated heating and cooling make its solder joints to get loose contacted. Here, your TV works fine for some minutes as you reports and the the problem arises. This is surely due to this kind of mistake. Just see, it is very difficult to locate the exact loose contact points. They will be microscopically minute, that we can't detect it with naked eye. The only remedy, as we techinicans do is, resolder all the suspected solder terminals of that section by applying a little more solder, without making shrot between adjecent soldering points. This is a very sensitive job, as it needs both patience and hand balance to solder. If you can, resolder all the hi-watt resistor solder terminals and IC solder terminals in the chroma section of your TV. You must have a good soldering iron with point soldering bit. If you are confident proceed. Otherwise, leave the job to any expereinced technican.OK

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You have bad grounds on your vertical IC. And you have a bad capacitor or two. I don't recall the actual location of the vertical IC location. I would say it may be U4501 location. Resolder the seven pins of this IC. Now check capacitor locations C4505 which is a 35 volt 220 Mf value, and C4506 which is a 63 volt 330 Mf value.Replace these caps as necessary. Then check the solder grounds at the power supply chip U4101, this chip is a switch mode regulator and may become detached from the board. Resolder these 11 pins and be careful not to short the pins with too much solder. Please note the two pins on the right (separated by a missing pin) are soldered together, this is OK. Now for the biggest challenge. You must pull the bottom shield off the tuner (has the RF connection). Yes, this area can produce the horizontal lines you speak of. When removed, you will see about 15 bad solder connections. This area will require great skill to resolder. The solder on the perimeter of this tuner is very difficult to work with, and you do not want to burn off any traces connecting to out side feeds. You could destroy this board. Now inside the tuner area there will be 5 pins or grounds that will need resoldered. Be careful here and not to burn off the small traces leading to other connections. Replace the tuner shield after complete inspection and soldering. In some cases the eeprom, locationU3201, will need replaced. Might not in your case as you say you can still watch TV and the audio is good. I know this is a lot of information, but this TV can be saved. I have repaired many of these. Thanks for asking and show a few hands of support.

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