Sony klv-40r352E Sound mute
Sony klv-40r352E This set came to the workshop for repair. It had no sound. The picture, etc. were all perfect. When I opened it and started fault finding, the audio IC BD28623MUV was getting VCC 19 voltage The audio source signals were also fine.They were reaching the System IC perfectly. I checked all the parts with the audio amplifier IC.They were fine.When I traced pin number seven of the audio amplifier IC, it was connecting to the system IC with a 100 Ω ohm resistor.This 100 Ω ohm resistor was bad. Pin number seven is the mute point, which the system IC makes high or low. When I changed this resistance, sound came out. My job is don
The system IC drives pin number seven of the audio amplifier IC high and low.
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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