Troubleshooting chapter from the common Samsung SM-M307F service manual, a 2.02 MB PDF for the Galaxy M30s. Tshoo marks Samsung troubleshooting pages, which give step-by-step fault flows for problems such as no power, no charging, no display, camera or audio failures, pointing to the parts and test points to measure. Open it with any PDF reader and use it together with the circuit diagrams, checking the model code on the device 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 @mobile_jump2. 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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)