How to Repair Charging Problems on Jio Bharat V2 and Jio K1 Karbon: A Step-by-Step Guide:
If experiencing charging problems with your Jio Bharat V2 LF061W or Jio K1 Karbon, you're not alone. Charging issues are common with mobile devices and can stem from a variety of causes. This guide will walk you through diagnosing and repairing common charging issues step-by-step. Explore our detailed guides for repairing Jio Bharat V2 and Jio K1 Karbon charging issues. Download schematic pinout diagrams to assist in your repairs.
Common Charging Problems in Jio Bharat V2 and Jio K1 Karbon:
Intermittent Charging: Sometimes the device charges, sometimes it doesn’t.
Battery Not Retaining Charge: The device shows charging, but the battery doesn’t hold power.
Fake Charging: The charging icon appears, but the battery percentage doesn’t increase.
No Charging Indication: The device doesn’t display the charging icon.
Battery Temperature Warning: The display shows a “Battery is Hot” message.
Overheating: The battery becomes excessively hot, and charging stops due to the PMB system cutting off charging.
Jio Bharat V2 And Jio K1 Karbon Charging Repairing Ways:
Step 1: Check and Replace the Charging Connector
The charging connector is often the culprit in charging issues. Dust, debris, or physical wear can prevent the connector from establishing a proper connection.
➔ Inspect the charging connector for visible signs of damage or dirt.
➔ Use a soft brush or compressed air to clean any dust or debris.
➔ Test the device after cleaning to see if the issue is resolved.
➔ If the problem persists, replace the charging connector with a new one, as faulty connectors can interrupt power flow.
Step 2: Check Charging IC Input (5V)
The charging IC requires a stable 5V input to function. Testing the input voltage is crucial in diagnosing power flow issues.
➔ Use a multimeter to measure the voltage at the charging IC input.
➔ Ensure the voltage reads 5V. If it’s below this, check for possible issues in the connection between the charging port and the charging IC.
➔ If the voltage is too low or fluctuates, consider replacing the charging connector or inspecting the motherboard for any broken traces or connections.
Step 3: Check DM and DP Connections (0.60V)
DM (Data Minus) and DP (Data Plus) pins handle data communication between the charger and the device, ensuring correct charging protocols.
➔ Set the multimeter to the voltage mode and measure the voltage between DM and DP points on the charging IC.
➔ Verify that they show around 0.60V. Inspect the tracks or paths connecting the DM and DP pins if the voltage is off.
➔ Repair any broken connections or, if necessary, replace the charging IC.
Step 4: Check Charging IC Output (4.2V)
The charging IC should output a stable 4.2V to charge the battery effectively.
➔ Measure the output voltage of the charging IC using a multimeter.
➔ Ensure that it reads 4.2V. If it is lower, it may indicate a problem with the charging IC or surrounding components.
➔ If the output voltage is incorrect, consider replacing the charging IC with a compatible model.
Step 5: Check Voltage Divider Resistors (100 Ohm and 10k Ohm)
The voltage divider resistors manage voltage levels to ensure the battery receives safe, controlled charging.
➔ Identify the 100-ohm and 10k-ohm resistors on the circuit, typically near the charging IC.
➔ Use a multimeter to check the resistance values of each resistor.
➔ If either resistor has a value significantly different from its specified rating, replace it.
➔ Resistors with too low or too high values can cause fluctuations in charging output, leading to problems like fake charging or battery overheating.
Step 6: Check the Input Signal and Feedback Voltage on the Charging IC (Pin 3)
The input signal and feedback voltage are crucial for the charging IC’s function. Proper feedback ensures the IC knows when to increase or decrease charging power.
➔ Locate Pin 3 on the charging IC (usually designated as the feedback pin).
➔ Measure the input signal and feedback voltage at this pin. A consistent, expected value indicates that the charging IC is functioning correctly.
➔ If there’s no feedback or the reading is off, this could indicate a faulty charging IC or other circuitry issues, which may require IC replacement.
Step 7: Replace the Charging IC (P22A - 8-Pin Charging IC)
If you’ve gone through the previous steps and are still experiencing charging issues, the charging IC is likely faulty.
➔ Desolder the existing charging IC (P22A - 8-pin model) from the board using proper soldering techniques.
➔ Install a new P22A charging IC, ensuring all pins are correctly aligned and soldered to their respective contacts.
➔ Test the charging functionality once the new IC is in place.
Step 8: Replace the Battery
A failing or damaged battery can cause charging issues. Symptoms like rapid overheating or failure to retain a charge often indicate a battery problem.
➔ Remove the old battery and inspect it for any signs of swelling or damage.
➔ Install a new compatible battery in its place.
➔ After installation, test the charging to confirm that the issue has been resolved.
Step 9: Short Battery BSI and GND with a 10k Ohm Resistor
BSI (Battery Status Indicator) helps the device monitor the battery’s charge state. A poor connection between BSI and GND can cause issues like overheating or false charge levels.
➔ Locate the BSI and GND terminals on the battery or device board.
➔ Connect a 10k-ohm resistor between BSI and GND to ensure the device accurately reads the battery status.
➔ Test the device to verify if this step resolves any “Battery Hot” or overheating issues.
Final Step: Check and Replace the Power IC (SC2720A)
If all else fails, the Power Management IC (PMIC) may be at fault. The SC2720A power IC manages battery power distribution and charging.
➔ Desolder the SC2720A power IC from the board carefully.
➔ Replace it with a new SC2720A IC, ensuring correct alignment and secure soldering.
➔ Test the device again. If the power IC was the problem, charging should now work as expected.
Shortcut Charging Repair Ways
Problem 1: Sometimes there is no charge and sometimes there is no charge.
Problem 2: It shows charging but is not stored in the battery.
Problem 3: Fack charging.
Problem 4: Charging Not Showing.
Problem 5: Display Showing "Battery Is Hot" problem.
Problem 6: Battery Too Hot, PMB Charging OFF.
Repairing Steps:
Step 1: Check And Change the Charging Connector.
Step 2: Check Charging IC InPut 5 Volt.
Step 3: Check the Dm and DP Connection. At 0.60 volts, check the dm and dp points.
Step 4: Check Charging IC Output 4.2 Volt.
Step 5: Check VoltageDividerr 2 resistor 100 ohmm and 10k ohm). If low Value and High Value then change the resistor.
Step 6: Check the Input Signal and Feedback Volt in the charging is 3 with no pin.
Step 7: Change the Charging IC(P22A - 8Pin Charging IC).
Step 8: Change Battery.
Step 9 Short the Battery BSI and Gnd Connect 10k ohm Resistor.
Last Step and Final Step: Check and Change the Power IC (SC2720A).
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