[SOLVED] I'm looking for Samsung SM-N910G Galaxy Note repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Samsung SM-N910G Galaxy Note. 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.

@Mido

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-N910G Galaxy Note 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/Guide/iPhone+4+Verizon+Upper+Antenna+Replacement/5064
Take a look at comment #905
Also, this : https://xdaforums.com/t/help-working-with-openvpn.1412009/.
You can also check this video starting from minute 3:

The Samsung SM-N910G Galaxy Note 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-N910G Galaxy Note 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-N910G Galaxy Note 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-N910G Galaxy Note 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://xdaforums.com/t/req-tf3dv2-tp2.487083/

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

If the external inspection and cable fit test suggest an issue, and you're comfortable with partial disassembly (e.g., removing the screen to access the charging port flex cable): Functional Test: Make a test call, send a text message, and verify mobile data functionality to ensure everything is working correctly. If these are dried out, dislodged, or poorly applied, heat won't transfer effectively. Flex Cable: A thin, flexible circuit board that connects the button mechanism to the main logic board. This can be particularly frustrating in drawing apps or when trying to select precise text. Precision Screwdriver Set: A collection of small screwdrivers with interchangeable bits (Phillips, Torx, Pentalobe) is necessary for the tiny fasteners used in smartphones. Rationale: Revert overclocking frequencies to stock or slightly above. Connect to Logic Board: Carefully connect the flex cable's connector to its receptacle on the logic board. Diagnosing battery drain effectively requires a systematic approach, distinguishing between software-related causes (apps, settings, OS bugs) and hardware issues (degraded battery, faulty components). Capacitors: These are the most common components to short to ground, especially after liquid damage or physical stress. How it Works: LCDs use liquid crystals that twist and untwist to block or allow light from a separate backlight unit to pass through. Disconnect Bluetooth Devices: If your phone is wirelessly connected to Bluetooth headphones, speakers, or a car system, audio will be routed there. Locate and Access the Charging Port Assembly: Identify the flex cable or small PCB that houses the micro-USB port. The rear panel might be held by screws (often hidden under stickers or rubber feet) or strong adhesive. If the flickering persists after a clean reset, it strongly points to a hardware issue. Tears/Creases in Flex Cable: Inspect the flex cable itself, especially near the connector. Corrosion: Check for green, blue, or white powdery residue, particularly near the connectors or in areas that might have been exposed to liquid. Visual Inspection (Under Microscope): Carefully examine the damaged FPC connector pin and the surrounding area. Schematics/Boardview: Refer to the phone's schematic diagram and boardview software. Trace Repair: Repairing broken electrical pathways on the PCB, often due to physical damage or corrosion, using jumper wires and UV solder mask. The earpiece speaker on a smartphone is a critical component for voice communication, allowing users to hear calls directly from the device. New Display Assembly: Ensure it's the correct type (LCD/OLED) and model-specific. Device Won't Turn On (No Power): The most common and critical symptom. Carefully slide the pick around the perimeter of the phone, gradually separating the adhesive. Assessing smartphone OLED color shift requires a systematic approach, relying heavily on visual inspection using specific test patterns and comparative analysis. By prioritizing safety, meticulously preparing the device, and employing appropriate methods based on the adhesive type, technicians can successfully remove batteries without causing collateral damage, ensuring a smooth and safe repair process and prolonging the life of the smartphone.9. By systematically diagnosing potential software culprits, from bloated caches and orphaned files to deeper system corruption, you can effectively reclaim your device's full storage potential. Cleaning a smartphone's internal cooling system involves careful disassembly and meticulous cleaning of these specific components. The goal is to very slightly increase the angle of the tongue so it makes better contact with the cable's connector. The exact combination varies by manufacturer (e.g., iPhone: Volume Up, then Volume Down, then hold Power; Samsung: Volume Down + Power; Google Pixel: Power button).

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