Schematic for the Samsung SM-A207F, the Galaxy A20s model code, packed in a 3.61 MB RAR archive that the name says contains PDF documents. No board revision is listed. After extracting, open the PDF in any reader to follow power supply rails, check PMIC and charging circuits, identify connector pinouts and find component values. Samsung service schematics are often paired with layout pages for locating parts. Check that your phone is the exact SM-A207F variant, since other A20s model codes may differ in radio hardware.
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 @GENERAL_SMART_PHONE_SCHEMATICS. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.