Huawei Y5 (2018) schematic diagram, delivered as a 2.31 MB PDF; the name carries a copy suffix but no board number or revision. A technician uses such a diagram to trace power lines from the PMIC, check charging and battery circuits, and follow display, camera and SIM connections when isolating a fault. Huawei often builds several board versions under one retail name, so compare the PCB markings against the diagram before replacing parts based on its designators. Readable in any PDF viewer with search for net names.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.