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Hitachi 4TEDT41 BLACK LINES

I have been searching for where to look on the F5 board that is located in the center lower part of the tv for broken solder joints. Could you give me some more information on where to look or some pictures would be great. thanks. Bryan.

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The solder joints aren't actually on a board. They are on the orange ribbons connecting the screen to the circuit board on the bottom of the set. It's a bit labor intensive to dismantle the TV down to access all of the ribbons as there is a 2 (ish) inch ribbon every 4 inches or so along the bottom, two of them are behind the screen braces. Depending on where the lines are, you'll have to remove different parts. Like building legos, just pay attention to where you got what and you'll be fine. The lines will coincide with the ribbon in the same area. once you have removed the braces, which you may not have to do depending on where the black lines are, there is a clear plastic shield across the bottom covering them. Don't be afraid to make a cut in this shield to expose the ribbons. Don't cut the shield off, just a vertical cut to get access. If I remember right, The ribbons unclip from the board by raising the dark brown tension clip on each latch. Be carefull with these they are very easy to break and d@mn near impossible to fix once broken.
Fold the ribbon down and back and you'll see the 100 chips on each ribbon. The solder joints holding those in place are what need touching up. With a 15 watt iron, NO LARGER, and a little tiny bit of solder, freshen up each joint on both sides of the 100 chip. Don't bother with the little one above them. Don't leave the iron on the chips for more than 2 seconds. If you want to prevent this from happening again, touch up each chip along all the ribbons. Let me know if you need more help. Happy to assist in any way I can.
Axle

Posted on Dec 12, 2008

  • Axle80
    Axle80 Dec 12, 2008

    clarification, there are 4 chips per ribbon, not a hundred. The chips you are looking for are marked with '100'.

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