[SOLVED] I'm looking for Samsung SM-A245N Galaxy A24 repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Samsung SM-A245N Galaxy A24. It's started acting up, and I'm looking for a detailed service manual with boardviews and schematics to properly diagnose and repair it. I need to take precise voltage measurements around the board, so having the right documentation would be very helpful.

Thanks in advance for your help.

Selected Answer

I actually found that service manual on a tech Discord server a while back. A really helpful member there shared a direct link to their blog and I've saved it. I'm happy to pass it along here. Hopefully, these boardviews and schematics help you fix your phone, just like they got me through my repair. Looks like we have the same model.

@Milan

Absolute legend! That's exactly the info I was searching for. This is going to save me so much time probing in the dark. Seriously, thanks a ton for sharing the link!

Hi there,

I also have the Samsung SM-A245N Galaxy A24 and just downloaded the manual you shared. I'm pretty new to board-level phone repair, and this is a bit intimidating with all the tiny test points and the schematics. Could you point me in the right direction on how to start troubleshooting this ? Any advice on the first few things I should check would be a massive help.

Thanks so much for your time

General advices: start by checking the voltage at the battery connector on the board. With a known-good battery connected, you should see a steady voltage between 3.7V and 4.2V. After that, a great next step is to check the main power management IC (PMIC) for shorts. Using your multimeter in diode mode, check for shorts on the large input capacitors surrounding the PMIC.

Here are a few useful references for troubleshooting your device:
https://www.ifixit.com/Answers/View/344288/TV+LED+screen+suddenly+dark+and+discolored+on+one+side
Take a look at comment #1139
Also, this : https://www.ifixit.com/Answers/View/626391/How+to+change+the+date+and+Time.
You can also check this video starting from minute 2:

The Samsung SM-A245N Galaxy A24 service manual and boardviews from the link above were exactly what I've been searching for. I couldn't find a complete, free copy anywhere else. Seriously, thank you for sharing this you're a lifesaver!

Hi everyone, I'm working on a Samsung SM-A245N Galaxy A24 with a no power issue and need some guidance with my measurements.
I'm detecting 3.3V on the VREG_MAIN line (pin 1 of the PMIC), which looks good, but I'm getting 0V on the VDD_CPU line (pin 8) where the schematics indicate I should see about 0.9V.
Since this is a core voltage for the application processor, could this missing rail be why the device shows no signs of life?
What's the best procedure to diagnose this further? Should I check for shorts on the CPU rail first, or look at the PMIC's enable signals?
I've already verified the main 3.3V and 1.8V power rails are present and stable.

My Samsung SM-A245N Galaxy A24 was working perfectly until yesterday when it suddenly went completely dead. Now it won't respond to the power button, doesn't vibrate, and shows no signs of life even when connected to a charger. I'm worried there might be a serious issue.

I have a decent multimeter, a basic soldering iron, and a healthy dose of patience. While I've successfully replaced iPhone batteries and charging ports, this will be my first attempt at actual diagnosis. The sheer density of BGA chips and microscopic components is honestly a bit overwhelming.

I'm particularly curious about the alcohol trick I've seen online where you apply isopropyl to the board and look for evaporation hotspots to locate shorts. Is this actually a reliable method for beginners, or are there better approaches I should try first with just a multimeter?

I learned this lesson the hard way last month with mine, it was declared "dead" by two different shops. The phone showed absolutely no signs of life - no charging indicator, no vibration, nothing. Before diving into complex board work, I decided to try one more basic test: wireless charging.

To my complete surprise, it actually heated up on the charging pad! This single discovery completely changed my diagnostic path. It turned out the issue wasn't with the main board or processor, but with the notoriously fragile USB-C port that had failed completely. A $15 replacement part and some careful soldering brought it back to life.

The moral? Always exhaust every external testing method before opening the device. Test wireless charging if available, try different charging methods, and don't assume the worst case scenario. Sometimes the most "dead" devices have the simplest solutions hiding in plain sight.

I suspect my issue might be related to that cheap, third-party fast charger I used at the airport last week... Now the device gets extremely hot during charging, the screen flickers at low brightness, and sometimes it randomly shuts down at 30% battery. Could this have damaged the power management IC or battery calibration?

If your Samsung SM-A245N Galaxy A24 starts acting up, random reboots, fast battery drain, or connectivity issues, there are several diagnostic steps you can take before assuming the worst:

• Check your charging habits: Using poor-quality chargers or wireless pads can gradually damage your battery and charging circuit, leading to unpredictable behavior.
• Inspect the physical components: A slightly damaged charging port, worn battery, or even accumulated pocket lint can cause issues that seem like major hardware failures.
• Monitor temperature patterns: If your phone gets unusually hot during specific tasks (like camera use or gaming), it could point to a failing component rather than a software issue.
• Use diagnostic tools wisely: Ampere for battery health, phone diagnostic codes (*#0*# on many models), and a thermal camera can reveal problems without opening the device.
• Know when to stop: If you see liquid damage indicators tripped or smell burnt electronics, it's time to consult a professional before causing irreversible damage.

Also visit this link it may help : https://www.ifixit.com/Answers/View/765224/power+supply+VOLTAGE+REGUIREMENT

Here's what I discovered on forums and technical databases:

Keep the SIM slot free of dust and debris by occasionally using compressed air. Analyzing these performance drops is essential to diagnose whether the issue stems from software inefficiencies, an aging storage chip, or other hardware problems. Evaluating touchscreen calibration problems requires a systematic approach, understanding the symptoms, and utilizing specific diagnostic tools and techniques. Focusing Issues: The autofocus mechanism can fail, leading to consistently blurry photos. Replacing a smartphone's auxiliary USB port is a common and often straightforward repair when approached systematically. Drops and Impacts: Physical shock can cause these brittle plastic clips to snap or become dislodged. If a customer presents a device with an MDM profile, particularly after a board swap or factory reset, it might fail to activate or restrict access to core features. Safe Mode loads the operating system with only essential system apps, disabling all third-party applications. By following these steps carefully, you can restore your phone's automatic brightness functionality, improving both convenience and battery efficiency.## 2. Cable Routing: Double-check that all flex cables are correctly seated and routed, ensuring no crimping or pinching. Settings Menu: Many Android phones have an accelerometer calibration option. Even after backing up, there are a few more critical steps before handing over your phone: Burning Smell: In extreme cases, a distinct burning plastic or electrical smell may emanate from the phone. Disable Developer Options (if enabled): Sometimes, experimental settings in Developer Options can interfere with touch. Inspecting smartphone vibration motor mounts is essential for diagnosing issues like weak vibration, buzzing noises, or complete lack of haptic feedback, especially after a drop or repair. Here, you'll see a graph of battery discharge and a list of apps and system processes consuming the most power since the last charge. The effectiveness varies, and such apps can sometimes impact performance or battery life. Several ethical principles should guide a technician considering flashing custom firmware: Observe for any signs of life, like a charging indicator light or battery icon. Back up all your data first! A factory reset will wipe your phone, returning it to its original software state. To hear it, these numbers must be converted into an analog electrical signal that can drive headphones. They consist of thin copper traces embedded within flexible polymer films (like Kapton), often with extremely fine pitch connectors. Once the adhesive is warm, attach a suction cup near the bottom edge of the screen and gently pull up to create a small gap. Cloud services, a computer backup, or external storage are all viable options. Therefore, any discussion of re-flashing an SE must emphasize the importance of legality, authorized access, and the critical role of these components in maintaining the trust and security of our digital lives. Pad Cleaning: Clean the IC pads on the motherboard thoroughly with desoldering braid and isopropyl alcohol. A smartphone's data port is a complex interface with multiple pins, each serving a specific purpose: Swelling is a clear indicator of a failing battery and a serious fire risk. Frequent Disconnections: The phone repeatedly connects and disconnects from Wi-Fi networks. Ventilation: Work in a well-ventilated area, as some solder masks may emit fumes during curing.

@Sabine, Not sure what you're trying to say but ok :)