[SOLVED] I'm looking for Samsung SHW-M570S Galaxy Core repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Samsung SHW-M570S Galaxy Core. 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.

@Fatima

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 SHW-M570S Galaxy Core 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/718494/Where+to+get+the+faceplate
Take a look at comment #574
Also, this : https://www.ifixit.com/Answers/View/406413/Website+log+in+then+shuts+down+not+working....
You can also check this video starting from minute 3:

The Samsung SHW-M570S Galaxy Core 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 SHW-M570S Galaxy Core 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 SHW-M570S Galaxy Core 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 SHW-M570S Galaxy Core 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/608238/My+iPhone+won't+turn+on+after+the+battery+drained+totally

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

Liquid Damage: Moisture, even a small amount, can enter the headphone jack and cause corrosion on the internal detection pins, leading to a permanent short or misreading. Remove SIM Tray: Essential to prevent damage during casing separation. Over time, the magnet embedded in the cover can weaken, shift, or even fall out entirely. Load the downloaded firmware files into the designated slots within the tool. Reassemble: Carefully reassemble the logic board and the entire phone. Debris Ingress: Dirt, lint, or small foreign objects can get trapped inside the SIM slot, obstructing the spring's movement. Low Noise Amplification (LNA): Amplifying weak incoming signals from the antenna with minimal added noise. The goal is to melt the solder quickly, allowing the gold to dissolve into this initial solder blob. Timely and thorough corrosion removal is paramount to salvaging a liquid-damaged device. Cracks or Burn Marks: On the PMIC itself or surrounding capacitors/resistors. Reconnect the Battery: Carefully snap the battery flex cable back into its connector on the logic board. Clean any old adhesive residue and apply new adhesive strips (if applicable). Do NOT check "Re-Partition" unless specifically instructed by a guide. The most common cause is a disconnected or improperly seated flex cable connector. Dust Spots: Dust or debris trapped behind a cracked or loose lens cover will appear as dark spots on your photos. A seller that stands behind their products is more likely to be selling quality items. Some technicians prefer to use traditional leaded solder (Sn/Pb) for rework on gold pads because it can be more forgiving in terms of wetting and has a lower melting point. Accelerometer: Detects linear acceleration, determining device orientation (portrait/landscape), step counting, and motion gestures. Blacklisting: Ensure the donor board's IMEI is clean and not blacklisted (reported stolen). Smartphone audio routing issues can manifest in a variety of ways: sound coming from the wrong speaker (e.g., loudspeaker instead of earpiece during a call), no audio from any output, audio only from headphones, or microphone not picking up sound during certain functions. Carefully work your way around the perimeter, separating the adhesive. Once you’ve identified the antenna and its connections, you'll need to carefully remove it. Press and hold the Side button and the Volume Down button simultaneously for 10 seconds. If you encounter slightly bent pogo pins or metal clips, you can attempt to gently realign them using fine-tipped tweezers. With careful attention to cleanliness and precise application, you can easily restore your smartphone's camera to its original glory. 5GHz): If your router broadcasts both 2.4GHz and 5GHz networks with separate SSIDs, try connecting to the other frequency. Primary Microphone: Often located near the charging port, close to the user's mouth during calls. Razor Blade/Plastic Spudger: For careful underfill removal (if necessary). As soon as the solder reflows, carefully lift the old IC straight up with tweezers. Remove any screws securing the shield, then use a plastic spudger to gently pry up and disconnect the battery flex cable from the logic board.

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