LED TV Teardown and Repair

Posted under Hacks, Repair, Teardown, Technology on December 13th, 2020 by

LED TV at home seems to be not turning ON(sometimes after a long time after power on). Opened it up troubleshooted the issue to power board section on the TV. No output voltage from the board to the Panel or the processing section. Input AC section seems to OK. No visible blown parts on board either. Trying to debug the root cause of the issue on the power board. Maybe a shorted cap or a faulty MOSFET? Still no idea. Debugging unknown circuits is fun. 😀

Even if you are not able to fix it, you will learn a lot.

TV Teardown
TV Repair
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How to Solder SMD parts properly?

Posted under Back to Basics, DIY, Educational, Hacks, Repair on November 29th, 2020 by

The SMD Hand Soldering Technique that always works for me.

Step 1: Add lots of flux (Liquid or Solid). (Folks usually skimp on this. This is the most important step to get a good soldering joint)

Step 2: Add a solder blob to one of the pads initially.

Step 3: Heat the pad with your soldering iron and with the tweezer slide in the part in the melted solder to hold it in place.

Step 4: Solder the other pad with your iron (which should be easy as it won’t move. Add flux if needed)

Step 5: Clean the flux with Isopropyl Alcohol.

PS: Not my best soldering effort is shown in the video below (Trying to get a good mobile camera angle shot and soldering is hard) 😀

But I wanted to show this on a 0402 part to show that this base technique is applicable to any part of any size. (It’s much much easier on larger parts)

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