Indicates a short circuit to ground.
If the phone displays a charging logo but the percentage does not increase, or if it fails to detect the charger entirely, follow this diagnostic path:
If the phone vibrates and receives calls but shows a black screen, the backlight circuit or the display voltage lines may be damaged.
Finding a reliable schematic for the is essential for diagnosing "dead" motherboards, charging issues, or backlight failures. oppo a15 schematic diagram pdf fixed
To summarize, for board-level repairs, . If that is not an option, the next best resource is a technician forum where professionals share their vetted documents.
Controls power distribution, vital for boot-up issues.
What are you trying to fix on this Oppo A15 (e.g., dead boot, no light, charging problem)? Indicates a short circuit to ground
Test the primary power line caps around the MT6357 Power IC.
MediaTek MT6357CRV, which controls voltage distribution across the entire logic board.
Verify if the 26MHz crystal oscillator is generating the reference clock signal required for the CPU to boot. To summarize, for board-level repairs,
Locate the small 9-pin or 12-pin OVP IC on the schematic. Check if 5V enters the IC and successfully exits it. If 5V enters but 0V exits, bypass or replace the OVP IC.
Check the schematic for the specific power supply lines feeding these chips (usually generated by the PMIC).