TCL-L32S5200 No Sound

I got a tcl-L32S5200 set, there was no sound in this set, picture and all other functions were working fine, it had audio amplifier ic number AD82587D installed, this IC is digital, I checked the supply of IC, vcc 12 volts and 3.2 volts were coming. I checked the signals going to the system and they were also fine. Now I looked at the clock data according to the circuit and then the pin number of the IC is 5 SDA. There was SCL on pin number 6 but there were no volts when I checked the voltage here. In this model, the ir sensor is installed near the audio IC. To support this sensor, the company has installed a rubber band. If we traced the clock data, then both tracks were going under the rubber band. If there was a check, both resistances were showing 1.5 mega ohme devalue, this resistance was 4.7K which supplies clock data from 3.3 volts. It was actually a design fault as the rubber-like gum spoiled the resistance. I am sharing all the information in the post, see the photos carefully. After installing the 4.7K resistor, the sound started and my job was done

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Shuakat Ali

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.

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