Circuit diagrams for the Quanta BY2D notebook motherboard, revision 3B, as an 867 KB PDF. BY2D is a Quanta project code, and the finished laptop brand is not given, so identify the board by the project and revision markings on the PCB. The schematic serves fault-finding work such as following the 3V and 5V always-on rails, tracing charger and CPU core regulators, and locating a shorted part on a given net. Different revisions can swap components, so confirm 3B matches the board on your bench.
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 @abgm_manutencao_esquemas. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.