S23 ORIGINAL CHARGING CARD

🔹 What Is the Charging Card (Sub Board)?

The charging card — also called the sub board or charging PCB — is a small electronic circuit located at the bottom of the Samsung Galaxy S23.
It connects to the main motherboard through a flex cable and includes the USB Type-C charging port along with several other key components.

🔹 Main Functions of the S23 Charging Card:

1. Charging Function:

   • It manages power input from the charger to the battery.

   • Ensures safe voltage regulation to prevent damage to the battery or motherboard.

2. Data Transfer:

   • Enables data connection between the phone and a computer through the USB cable.

   • Used for software flashing, file transfer, and debugging.

3. Microphone Connection:

   • The bottom microphone (used for calls and voice recording) is located on or connected through the charging board.

4. Antenna Connection:

   • The sub board often includes antenna contacts or connectors to help with network signal and Wi-Fi performance.

5. Vibration Motor / Speaker Links:

   • It connects the loudspeaker and sometimes the vibration motor to the main board.

6. USB-C Accessory Support:

   • Handles communication with accessories (like USB drives, earphones, or OTG devices).

🔹 Reasons Why the Charging Card Is Replaced:

1. Charging Problems:

   • Phone not charging or charging intermittently.

   • Fast charging not working properly.

2. Physical Damage to Charging Port:

   • USB Type-C connector is loose, bent, or corroded due to repeated plugging or moisture.

3. No Data Transfer:

   • Computer does not detect the phone when connected via USB.

4. Microphone Malfunction:

   • Caller can’t hear your voice or the bottom mic doesn’t work.

5. Liquid or Moisture Damage:

   • Water or humidity corrodes internal circuits of the charging board.

6. Short Circuit or Burnt Components:

   • Power surge or using a faulty charger may damage the sub board.

🔹 Summary:

The Samsung Galaxy S23 Charging Card is responsible for charging, data transfer, microphone function, and antenna connection.
It is replaced when the phone has charging, USB, or microphone issues, or when the Type-C port is physically damaged or corroded.