For official manuals or schematics, you can find resources like the TP.MS338.PB801 Instruction Manual or voltage details on Scribd .
Turn off the TV, insert the USB, and then turn it on. Some models require holding the Power button on the TV panel until the update progress bar appears. Download MS338 PB801 1366x768 SAMSUNG 4GB 512MB part3 rar
Copy the extracted .bin file directly to the root of the USB drive (not inside a folder). For official manuals or schematics, you can find