How to fix Sony TV Color problem | T-Con Board Repair
How to fix a Sony TV color problem. Let’s learn this Bravia series model KLV-32S550A. I came to the workshop for repair. This TV had a green color disturbance. The customer said that it was running in normal condition. Suddenly its colors got distorted. My expert opinion was that its T-CON board has a fault. Since it is a very old model, this is a common fault of this set. But I had to work hard to repair it.
initial inspection
I opened this set in my workshop lab and first of all did its physical inspection. I removed the cover of its T-CON board and checked it. I felt its gamma IC was very hot. You can guess its heat from the fact that my finger almost got burnt. This will confirm that this IC number AS15 is faulty and needs to be replaced. This IC is of two types. One has a heat sink pad under it, and the other type is simple.
- Fault Green Color Disturb
- Initial inspection Faulty T-con diagnosis
Gamma Correction IC-AS15 Faulty
I removed the AS15 IC from the T-con board. I think this IC is changing for the second time because its main VCC pins were connected externally. However, when I removed it, I saw that the PCB was badly burned from below. So this is a common fault, but due to the burning of the PCB, I had a very difficult time replacing this part. I scratched the burned area with a sharp blade and cleaned it and replaced the IC.
AS15 IC replacement
I washed the T-con card thoroughly by replacing the AS15 IC. Let’s talk a little about this IC. This gamma correction IC has 14+1 channel voltage buffers that buffer the reference voltage to the screen so that each color appears completely accurate in its place. Since these sets are quite old, it is common for this IC to malfunction. However, caution is required while changing it. Use a heat gun with appropriate heat so that the PCB is not affected.
- The faulty green color disturbs.
- Diagnose the T-con card.
- Replacement AS15 IC.
- All colors are perfect.
- The fault has been fixed.
Conclusion
You saw that in this case, we solved the color problem of the Sony Bravia, and we did not replace its T-con, but we replaced the IC inside the T-con, and after this replacement, the colors of the TV started coming out perfectly, and it started working like new. We have done chip-level repairing work in this set, so if any technician has any questions about this, he can ask in the comments and I will answer it.
Q&A Section:
- Why is my Sony Bravia TV screen showing green color or patches?
Answer: This fault can also be of the LVDS signal, and if horizontal patches of green color are formed, then this fault is Cof. It could also be a replacement.
- How do I fix the green tint or distorted colors on my Sony LED TV?
Answer: The LVDS signal problem is expected to be a main board or main board and T-con board communication problem.
- Is the green color problem in the Sony TV caused by the T-Con board or panel?
Answer: Which board has more chances depends on the model. However, this issue is usually related to the gamma section.
If you want to read our article on ‘Why is My TV Volume Stuck at 100’, click here.
Shaukat Ali has over 30 years of experience in LED TV repair, specializing in chip-level repair work. He is an expert in Sony LED TVs, and also repairs other major brands like Samsung, TCL, Orient, and Haier. His expertise includes display panel faults, motherboard issues, power supply circuits, T-Con, and HDMI faults. Based in Lahore, he shares real-time fault finding cases from daily repair work to help technicians and learners with practical experience.
📞 Contact: +92 321 4066054