S22 5G ORIGINAL CHARGING CARD

🔌 What Is the “Charging Card” in the S22?

In mobile repair terminology, the “charging card” (also called the charging board, sub-board, or charging PCB) is the small circuit board at the bottom of the phone that contains the USB Type-C charging port and related components.

This board connects to the main motherboard through a flex cable and is responsible for:

• Charging the battery

• Data transfer via USB-C

• Microphone input (main mic is often located on this board)

• Antenna or signal connection lines (sometimes integrated)

• Vibration motor or speaker connection (depending on design)

• Earphones or OTG device connection (via the USB-C port)

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⚙️ Main Functions of the Charging Card

1. Power Input & Regulation

   • Transfers power from the USB-C port to the power IC and battery.

   • Ensures correct voltage and current levels.

2. Data Communication

   • Handles USB data transfer between the phone and a PC or accessory.

3. Microphone Operation

   • Houses the primary bottom microphone used for calls and recordings.

4. Antenna / Connectivity Support

   • Some models integrate antenna jumpers or contacts on the same board.

5. Accessory Interface

   • Enables OTG (On-The-Go) support — USB drives, keyboards, etc.

6. Signal Routing

   • Acts as a communication bridge between the charging port and motherboard.

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⚠️ Common Reasons for Charging Card Failure or Replacement

1. Physical Damage to Charging Port

   • Bent or broken USB-C pins due to frequent plugging/unplugging or using poor-quality cables.

   • Port loosened from the board due to mechanical stress.

2. Moisture or Liquid Damage

   • Corrosion inside the charging port causes “moisture detected” errors or no charging.

   • This is very common in phones exposed to humidity or water.

3. Short Circuit or Overvoltage

   • Using an incompatible charger or power surge can damage the charging IC or lines.

4. Dust and Debris Accumulation

   • Dirt or lint can block proper connection, leading to intermittent or slow charging.

5. Microphone Failure

   • If the mic on the charging board fails, you’ll notice call audio issues (others can’t hear you).

6. No Charging / Slow Charging / PC Not Detecting

   • Damaged connector pads, internal traces, or charging IC cause no power transfer.

   • Sometimes phone shows “charging,” but battery percentage doesn’t increase.

7. Intermittent Connection or Cable Looseness

   • The solder joints between the port and the board may crack or weaken over time.

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🔧 When to Replace the Charging Card

You should replace the charging card if you notice:

• The phone does not charge even with a good cable/charger.

• Loose port that moves or wiggles when the cable is inserted.

• No data transfer or PC does not recognize the phone.

• Bottom mic not working during calls or recordings.

• Moisture detection warning that doesn’t clear after cleaning/drying.

• Overheating near the port or irregular charging behavior.

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💰 Approximate Replacement Details

• Part name: Samsung Galaxy S22 Charging Sub-Board / Charging PCB

• Includes: USB-C port, mic, connector flex, sometimes antenna contact.

• Replacement time: ~30–45 minutes by a trained technician.

• Cost (varies by region): Typically between $20–$40 USD for the original board; less for copies.

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🧠 Tips to Prevent Future Damage

• Always use original Samsung or PD-certified chargers.

• Avoid charging the phone in wet or dusty environments.

• Never force the cable in — the port pins are delicate.

• Clean the port gently with a soft brush or compressed air if needed.

• If you see “moisture detected,” let the phone dry fully before plugging in.