Because your PDF is high-res, you can zoom 800% without pixelation. Read the pin label directly:
Understanding the internal architecture of the Redmi 13C is essential for precision repairs, whether you are a professional technician or a dedicated DIY enthusiast. High-quality schematics provide the "extra quality" needed to navigate the device's complex circuitry without causing collateral damage. Key Hardware Overview schematic redmi 13c extra quality
If the camera or fingerprint sensor fails, check the SDA (Serial Data) and SCL (Serial Clock) pull-up resistors indicated in the peripheral section of the schematic. Because your PDF is high-res, you can zoom