How to Check Level Shifter Signals in LED TV Using DSO

In this technical repair guide, Magiccare Electronics walks you through the professional process of diagnosing a "No Picture" fault in 32-inch LED TVs. We dive deep into checking LC1 and LC2 signals, tracing T-CON processor outputs, and using a DSO (Digital Storage Oscilloscope) to identify missing switching voltages. Whether it's a faulty Level Shifter IC or a T-CON processor issue, this video shows you the exact measurements and test points needed for a successful repair. Advanced LED TV Repair Guide | Panel & Motherboard Troubleshooting by Magic Care Electronics led tv repair is a very noble Job & It Creates a very healthy environment, magic care is a brand In this video, you will learn: How to identify and trace switching signals from the T-CON processor. Using a DSO to measure signal frequency (12.56 kHz). How to test LC1 and LC2 switching voltages (-10V to 27V). Diagnostic steps to differentiate between board faults and panel/COF damage. Practical tips for removing jumpers/resistors to isolate short circuits in the gate area. Video Timestamps 00:00 – Initial signal check for T-CON processor outputs 00:13 – Explaining the role of the Level Shifter IC in switching voltage 00:37 – Deciding to replace the T-CON processor IC 01:42 – Testing the new IC: Confirming the 12.56 kHz pulse signal 02:57 – Checking LC1 and LC2 switching voltages (-10V to 27V) 03:41 – Troubleshooting why the picture hasn't returned (Panel/COF Check) 04:43 – Confirming LVDS output and resolution matching (1366x768) 05:51 – Starting a new diagnostic on a China Brand 32" TV (No Picture fault) 06:29 – Measuring AVDD and VGH boost supplies 07:20 – Identifying fixed voltage on LC1 (Switching Failure) 08:02 – Testing for shorts between HC1-HC8 and LC1-LC2 09:00 – Isolating the Gate Area by removing SMD resistors 10:25 – Final diagnosis: Determining if it’s a Level Shifter or Processor signal issue Don't forget to Subscribe to Magiccare Electronics for more professional TV repair tutorials! #VinodKenny #MagiccareElectronics #LevelShifterSignal #LEDTVRepair #DSOTesting #Oscilloscope #PanelRepair #TConBoard #ElectronicsRepair #TVDisplayFix #COFRepair #TVRepairCourse