Galaxy A15 5G Does not Charge: Difference between revisions

Galaxy A15 5G Does not Charge
Device	Galaxy A15 5G
Affects part(s)	Motherboard
Needs equipment	Soldering Iron, Hot-Air Station, Microscope
Difficulty	◉◉◉◌ Hard
Type	Soldering

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Latest revision as of 21:10, 13 September 2025

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Problem description

The device does not Charge

Symptoms

Device doesn't charge.

Solution

There isn't a straight solution to fix a Galaxy A15 not charging however in this guide we will go over how the charging circuit works.

Diagnostic Steps

The first thing is if you can try a new charge port and Flex cable and if you have on hand a battery as well, you don't have a board problem until you prove you dont have a parts problem.

If parts dont fix the issue the problem is on the motherboard.

The first thing to check is for any damage to this FPC, it is super common to have this FPC damaged especially if the phone is bent.

if the FPC is damage the Solution is to replace it, this FPC is the same on all these devices: Galaxy A52 / 5G (A525 / A526 / 2021) / A32 / 5G (A325 / A326 / 2021) / A42 5G / A12 / A53 5G / A54 5G / A15 5G / A72 / A13 5G / A23 5G

If the FPC is ok next thing to do is making sure the board is receiving 5V from the charger.

To mesure this like you need to connect the charger to the Phone.

If 5V are not present and you have made sure that the charge and Flex cable are ok there may be a short on this line or a broken connection between the motherboard layers.

Next step if the 5V are present is to check if the Over Voltage protection IC is letting the current trough.

Check that you have 5V in the spot like in the image below if you don't the OVP is letting the voltage trough replace it.

Next thing to check is if the the IF PMIC is getting the 5V if you dont have 5V on point in the image below replace the SM5461 IC

If 5V are present there Replace the IF PMIC SM5714A this is the actual chip that charges the battery.

If even after doing all these steps the device does not charge check the CC1 and CC2 lines Check lines connect to the IF PMIC the expected diode value of them is 0.660

These lines can be measured here:

These steps should cover all issues all issues related to charging of the Galaxy A15 the most common issues are a damaged FPC, a Faulty or Blow OVP, or a faulty IF PMIC.

Final Testing

If you replaced the FPC, make sure to test every function of the device, especially:

Bottom Speaker
Bottom mic
Data transfer
Image/touch

If the OVP was faulty, try to understand if the previous cable/charger is of good quality.

@@ Line 13: / Line 13: @@
   -->
-The iPhone doesn't charge and touch doesn't work
+The device does not Charge
-[[File:Iphone 15 pro max not charging.jpg|thumb|iPhone 15 Pro Max Not Charging.(Image by Cell Phone Repair Academy)]]
 == Symptoms ==
 <!--
@@ Line 21: / Line 19: @@
 -->
 * Device doesn't charge.
-* Device doesn't charge and touch is also not working.
 == Solution ==
@@ Line 29: / Line 26: @@
 -->
-This problem is usually associated with a bad U9500 this chip detects what is connected in the USB C port.
+There isn't a straight solution to fix a Galaxy A15 not charging however in this guide we will go over how the charging circuit works.
 === Diagnostic Steps ===
-The first step is to always rule out faulty parts. Start by testing a new display and battery.
+The first thing is if you can try a new charge port and Flex cable and if you have on hand a battery as well, you don't have a board problem until you prove you dont have a parts problem.
+If parts dont fix the issue the problem is on the motherboard.
+The first thing to check is for any damage to this FPC, it is super common to have this FPC damaged especially if the phone is bent.
+if the FPC is damage the Solution is to replace it, this FPC is the same on all these devices: '''Galaxy A52 / 5G (A525 / A526 / 2021) / A32 / 5G (A325 / A326 / 2021) / A42 5G / A12 / A53 5G / A54 5G / A15 5G / A72 / A13 5G / A23 5G'''
+[[File:Galaxy A15 FPC.png|center|thumb|543x543px|Galaxy A15 FPC]]
+If the FPC is ok next thing to do is making sure the board is receiving 5V from the charger.
+To mesure this like you need to connect the charger to the Phone.
+[[File:5V input.png|center|thumb|403x403px|5V input]]
+If 5V are not present and you have made sure that the charge and Flex cable are ok there may be a short on this line or a broken connection between the motherboard layers.
+Next step if the 5V are present is to check if the Over Voltage protection IC is letting the current trough.
+Check that you have 5V in the spot like in the image below if you don't the OVP is letting the voltage trough replace it.
+[[File:Galaxy A15 OVP.png|center|thumb|480x480px|Galaxy A15 OVP]]
-If your device doesn't charge, this doesn't mean the U9500 is bad. This issue can also be caused by a faulty Tigris IC. A good way to test is to try a wireless charger. If the device charges with a wireless charger, it means the Tigris IC is working.
-For the U9500 to work, it must have 5V on the pad below. To measure this, you will need to separate the motherboard, connect the charging port, and then connect it to a charger.
+Next thing to check is if the the IF PMIC is getting the 5V if you dont have 5V on point in the image below replace the SM5461 IC
-[[File:5V U9500 input.png|center|thumb|U9500 5V Input]]
+[[File:IF PMIC 5V input.png|center|thumb|561x561px|IF PMIC 5V input]]
-If you measure 5V at the input, it indicates that the U9500 is receiving power and should be functioning.
-=== Repair Steps ===
-The U9500 doesn't work alone, it functions in conjunction with a ROM IC (U9720). This creates a challenge because we cannot replace just the U9500. To replace the U9500, we must also replace the U9720, and both components need to be sourced from a donor board, specifically from an iPhone 15 Pro Max. '''They cannot be sourced from an iPhone 15 or 15 Pro.'''
-[[File:IPhone 15 Pro Max.png|center|thumb|IPhone 15 Pro Max Charging ICs]]
+If 5V are present there Replace the IF PMIC SM5714A this is the actual chip that charges the battery.
-==== Replacing the U9500 and U9720 ====
+If even after doing all these steps the device does not charge check the CC1 and CC2 lines Check lines connect to the IF PMIC the expected diode value of them is 0.660
-* Use your hot air station to desolder the old U9500 IC from the motherboard, while its still hot desolder the ROM IC U1030.
+These lines can be measured here:
-* Clean the pads on the motherboard thoroughly.
+[[File:Galaxy A15 CC Lines.png|center|thumb|603x603px|Galaxy A15 CC Lines]]
-* Reball the new U9500 if it isn't pre-balled.
-* Reball the new U9720.
-* Use your hot air station to solder the new U9500 IC onto the motherboard.
-* Solder the new U9720
-After replacing the U9500 and U9720, test if the phone is charging and if the touch functionality is working. To do this, connect the charging port, screen, and battery to the top board. The iPhone 15 Pro Max can power on with just the top board. Plug the phone into a charger and use an amp meter to measure the current the phone is receiving.
-After confirming that the phone is charging and the touch functionality is working as expected, the next steps are to reball the bottom board and resolder both boards back together.
+These steps should cover all issues all issues related to charging of the Galaxy A15 the most common issues are a damaged FPC, a Faulty or Blow OVP, or a faulty IF PMIC.
 == Final Testing ==
-After assembling the phone, ensure every function is working as expected, not just the charging circuit.
+If you replaced the FPC, make sure to test every function of the device, especially:
-Connect the phone to a fast charger and check if it fast charges using an amp meter. If it’s fast charging, it should draw 9V and around 2+ amps, depending on the battery capacity.
-Connect the phone to a computer and verify that data transfer is working.
+* Bottom Speaker
+* Bottom mic
+* Data transfer
+* Image/touch
-Connect USB-C headphones and confirm that audio is functioning as expected.
+If the OVP was faulty, try to understand if the previous cable/charger is of good quality.