Datasheet-style PDF of 104 KB referencing the 2SC4851 transistor. In Japanese JIS part numbering, 2SC marks an NPN bipolar device, which suits a component specification rather than a laptop board diagram despite the schematic label. Use it to identify the base, collector and emitter pins, read breakdown and saturation figures, and judge whether an alternative part is electrically compatible. It opens in any PDF viewer. SMD versions may show only a short marking code, so confirm identity first.
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 @cyberlanelectonik. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.