Schematic for the Fly B400 mobile phone, packaged as an 819 KB PDF. Circuit sheets like these show the power management, battery and charging section, keypad, display, audio and RF blocks, with reference designators for each part. A technician uses them to measure expected voltages, trace a dead line or locate a component that is causing a short. Open the file in a PDF reader that supports zoom and search, and confirm the PCB label matches the B400 before relying on values.
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 @schematic_mobiles. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.