Yeah, I know that nobody cares for under-32" TVs, but I do.
This 20" TV exhibits a typical T-CON gamma problem, with posterized colors or even negative colors. Since this Vestel TV carries a AUO T200XW02 V.0 panel, I had some hope of finding a nice AS15-F inside T-CON. No luck this time, but very close. There're two AS04-G ICs (U401 and U551) in T-CON. After some research, it's E-CMOS quad operational amplifier, and its official part number is EC5564TG. I don't know why this manufacturer marks their ICs with something completely unrelated to part number! There's enough room over a SSOP-14 to write full part number.
I've replaced U401 with an apparently equivalent AS34-G (E-CMOS EC5534I-G) and colors are back to normal!
This 20" TV exhibits a typical T-CON gamma problem, with posterized colors or even negative colors. Since this Vestel TV carries a AUO T200XW02 V.0 panel, I had some hope of finding a nice AS15-F inside T-CON. No luck this time, but very close. There're two AS04-G ICs (U401 and U551) in T-CON. After some research, it's E-CMOS quad operational amplifier, and its official part number is EC5564TG. I don't know why this manufacturer marks their ICs with something completely unrelated to part number! There's enough room over a SSOP-14 to write full part number.
I've replaced U401 with an apparently equivalent AS34-G (E-CMOS EC5534I-G) and colors are back to normal!