Hot Testing Method

What is Hot Testing Method

When the active voltage coming at the tips of the component installed in the mobile pcb, check by giving 3.7 voltage from the dc supply machine in the mobile phone. So this is called hot testing. These voltages are active voltages, so the section that needs to be checked, that section has to be activated, like before you check the spekar tips, you have to activate the spekar by playing the song.

In this testing, by setting the multimeter in dc (20v) mode, placing the black prob on pcb ground, testing the tips from red probe. So one value is found, that value can be different on the tips of each section. The value and its name in all the sections are written below, if it is more or less than that, then there is a fault in that section of the mobile. This value is not fixed, it may be less, more.
  • Ear Phone Connector Tip (+ , -) during working: 1.2V to 3.0V
  • Loud Speaker / Ringer Connector Tip (+,-) during working: . 1.2V to 3.0V
  • MIC Connector Tip (MIC) (+): 1.8 to 3.0
  • Battery Connector Tip (+): 3.7
  • Display light IC: CPU (EN Signal ) 1.2V to 2.8 V
  • Display Connector Supply Pins: 1.8V to 2.8V
  • Display & Touch Connector Signal Pins During Working: . 1.8V to 3.3V
  • Camera Connector Supply Pins: 1.8 to 2.9
  • Camera Connector Signal Pins During Working: 1.8V to 3.3V
  • Key Tip (Row and Column) One Side: 1.8 to 2.8V
  • Charger Connector Tip (Vcharge )When charger Connected : 5V to 6V
  • Power ON / OFF Switch Point (+): 1.5V to 4.2VMIC Connector Tip (MIC) (+): 1.8 to 3.0
  • SIM Card Connector Pin 1 (VSim) When SIM Connected: 1.8 to 3.0V
  • Micro SD Card Connector(VDD) When MMC Connected : 1.2V to 3.0V

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