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Paso 3
Then confirm the power supply source of PP3V3_G3H. PP3V3_G3H is outputted from U6990 via L6995. Locate U6990 with bitmap. Then locate the corresponding position of U6990 on the logic board.
Diagnosis
  • Then confirm the power supply source of PP3V3_G3H. PP3V3_G3H is outputted from U6990 via L6995. Locate U6990 with bitmap. Then locate the corresponding position of U6990 on the logic board.

  • Traces of damage can be found on chips around U6990. Confirm the working condition circuit of U6990 with drawing. Then locate L6995 with bitmap.

  • Run diode mode measurement of L6995. The measured value is normal.

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