PDF schematic for the BN44-00291A power board, a part number in Samsung's BN44 series of power supply modules fitted to LCD and LED televisions and monitors. The file name gives nothing beyond the part code, so the exact TV models that use it are not stated. Technicians use such diagrams to trace the standby and main output rails, check the PWM controller, and find shorted rectifiers or MOSFETs. Make sure the label on the board, including the final revision letter, matches before replacing parts. Size is 125 KB, readable in any PDF viewer.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @gunvantrathore. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.