Sony kdl-50w800c fault dead
The Sony set came to me for repairing and it was completely dead. I checked the power supply adapter and it was working fine. The pilot light of the no set was also off. Now I opened the set and started checking, only nineteen volts was coming. There was a three-point three-volt regulator with a small volt output every few seconds. IC Z1236Q11 was installed in it and nineteen volts were being input. I checked the resistance and found that R9317 was defective. There was a voltage divider of three resistors installed here, which gives a voltage reference to the feedback of the IC. I am also giving the circuit diagram with the set-up photo inside the post
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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