Check the motherboard under a microscope for liquid damage, burnt components, or cracked solder joints.
If the links above become outdated, search for "VIVO Y93 图纸" (Chinese) or "Vivo Y93 schematics boardview" (English) on repair‑specific forums. New resources continue to appear as the community supports older devices. vivo y93 schematic diagram download new
This is a theoretical, page-by-page circuit drawing. It displays how components connect electrically using standardized symbols. It tells you: Check the motherboard under a microscope for liquid
Signal dropping or "No Service" errors require an analysis of the Radio Frequency (RF) section. The diagram maps the Power Amplifier (PA) ICs, Antenna switches, and Transceiver paths for both 3G and 4G LTE frequencies. What is Included in the New Schematic Download Package? vivo y93 schematic diagram download new
Locate the charging IC (PMI8940 or similar on SD439).