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Paso 2
Measure main power supply inductor L7030 first. The measured voltage value is 0V, which is abnormal. Confirm L7030 relevant circuit PPDCIN_G3H (also known as =PPHV_EXT_G3H) on the schematic software.
Diagnosis
  • Measure main power supply inductor L7030 first. The measured voltage value is 0V, which is abnormal.

  • Confirm L7030 relevant circuit PPDCIN_G3H (also known as =PPHV_EXT_G3H) on the schematic software.

  • Confirm the working condition of U3100. Confirm U3100 main power supply Pin H1 VIN_3V3 (also known as =PP3V3_G3H_UPC_XA). =PP3V3_G3H_UPC_XA is converted into PP3V3_G3H via R3000.

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