S24 ULTRA ORIGINAL CHARGING CARD

1. Main Functions of the Charging Card (Sub-Board)

a. Charging Port (USB-C Port)

• Handles power input from the charger

• Transfers power to the main motherboard

• Supports Fast Charging, Super Fast Charging, and USB-C Power Delivery

b. Mic (Primary Microphone)

• The bottom microphone is usually connected to this board

• Used for:

  • Calling

  • Voice recording

  • Video recording

  • Noise cancellation support

c. Network & Antenna Lines

• Some antenna contacts are located on this board

• Helps in:

  • Mobile network signals

  • Wi-Fi stability

  • 5G and LTE connectivity

d. Vibration Motor Connection

• Controls and connects the vibration motor in many phone models

e. Charging IC / Power Management Support

• Contains circuits that regulate voltage

• Protects against over-current or short circuits

f. USB Data Transfer

• Allows data transfer between phone and computer

• Handles USB debugging and OTG functions

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2. Why the Charging Card Gets Damaged (Common Reasons)

a. Water or Moisture Damage

• Charging ports get rusted

• Affects connectors and mic

b. Dust or Dirt

• Deposits inside the USB-C port

• Causes short circuits or weak connections

c. Using Low-Quality Chargers

• Can burn tiny components on the board

d. Physical Damage

• Forcefully inserting the charging cable

• Dropping the phone

• Damage to the USB-C port

e. Overheating

• High heat can affect soldered components on the sub-board

f. Wear and Tear

• Ports get loose over time due to repeated plugging/unplugging

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3. Symptoms of a Faulty Charging Card

• Slow charging or no charging

• Super Fast Charging not working

• Phone only charges at a specific angle

• Mic not working during calls

• No OTG connection

• PC not detecting phone

• Heating near the charging port