S23 ULTRA 5G ORIGINAL CHARGING CARD

⚙️ What is the Charging Card / Sub Board in S23 Ultra?

The charging card (also called the charging PCB board or sub-board) is a small but essential electronic board located at the bottom of the phone.
It connects to the main motherboard through a flex cable and handles charging, data transfer, and several other functions.

🔋 Main Functions of the S23 Ultra Charging Card

1. USB Type-C Charging Port

   • It is the main connection point for charging the phone.

   • Transfers power from the charger to the battery via the mainboard.

2. Data Transfer Function

   • Allows data communication between the phone and a computer using a USB cable.

   • Enables software flashing or file transfer.

3. Main Microphone Connection

   • The primary mic used for calls and video recording is often mounted on the charging board.

   • If the mic stops working, this board is often replaced.

4. Antenna / Signal Connectors

   • The sub-board also includes connectors for network antennas, helping maintain cellular and Wi-Fi signals.

5. Bottom Speaker / Vibration Motor Connectors

   • It provides electrical connections to the bottom loudspeaker and sometimes the vibration motor.

6. Grounding and EMI Protection

   • Helps control electrical noise and ensures stable current flow for safe charging and signal clarity.

⚠️ Common Reasons Why the Charging Card Needs Replacement

1. Physical Port Damage

   • Frequent plugging/unplugging of the USB-C cable, or using tight/loose connectors, can bend or break the charging pins.

2. No Charging / Slow Charging Issue

   • If your phone doesn’t charge properly even with a good charger, the sub-board circuitry or port may be faulty.

3. Data Connection Failure

   • When your computer doesn’t recognize the phone through USB.

4. Microphone Problems

   • If people can’t hear you during calls and cleaning the mic doesn’t help, the mic (on this board) might be damaged.

5. Liquid or Moisture Damage

   • Water or humidity can corrode the charging port or short internal circuits.

6. Dust or Debris Blockage

   • Dirt inside the Type-C port can prevent proper contact or cause intermittent charging.

🧾 Summary Table