LCD TV With Strange Colors Repaired. Model: Sansui 3210
An LCD TV was brought to my shop for repair. It is 32 inches TV and when I powered on the device, I saw a strange color formation on the screen. Take a look
From experience, this an issue that I see a lot on LCD TV sets and the main cause for it is the T-Con board.
I usually I replace the whole board but today, since I know the cause of the issue, I decided to replace only the part that has to do with this fault.
This is the T-con board; it is suppose to get 12 DC volts at the main fuse of it and the reading was there because I could see a picture on the screen.
The main IC that has to do with colors is called the Gama IC and the part number is AS15G. It is clearly marked by an arrow in the picture. How did I know it was a faulty IC? Well, turn the TV on and put your finger on it, you will feel it getting hot and that is enough indication that it was faulty.
With re flow hot station and some flux paste on this IC I was able to take it off board and replace it with a new one that I bought off an online seller.
I bought a lot of them actually because they get faulty very often.
Once I cleaned the area of the old IC, added some flux paste to it and with a r flow station with hot are set to 350 C temperature and the air flow to 80 I was able to put the IC back and test the TV set.
As you can see, there is a big difference in the picture display on this set. The customer was happy to get it back because he was not expecting to get fixed.
This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.
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Note: You can check his previous repair articles in the link below: