[SOLVED] I'm looking for Samsung SM-N9005 Galaxy Note repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Samsung SM-N9005 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.

@Luna

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-N9005 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://xdaforums.com/t/problem-with-devices-compass.1551699/
Take a look at comment #712
Also, this : https://www.ifixit.com/Answers/View/62145/does+my+hp+g60+230us+laptop+have+both+the+lcd+power+inverter+cclf.
You can also check this video starting from minute 1:

The Samsung SM-N9005 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-N9005 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-N9005 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-N9005 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://www.ifixit.com/Answers/View/429274/Disk+trapped+in+DVD+drive

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

While some problems can be resolved with simple steps like clearing the cache, deeply rooted corruption often requires a full system re-flash, underscoring the importance of careful usage and proactive data backup strategies. Button Misalignment: Power and volume buttons may become stuck, mushy, or completely unresponsive if the frame's cutouts are deformed. Approximately 80% of charging issues can be resolved with these basic steps. Hot Air Rework Station: Set your hot air station to a precise temperature (typically 300-360°C, adjust based on board and component) and appropriate airflow. Precision Screwdriver Set: Pentalobe, Phillips, Tri-point, Torx bits, relevant to your phone model. The PMIC is the heart of a phone's power distribution system, regulating voltages for nearly every component. Avoid putting your phone in pockets/bags with keys, coins, or other sharp objects. Accurately assessing the root cause of these fluctuations is key to effective troubleshooting. New Replacement Cable Guides: These are often small, model-specific plastic pieces. Downgrading a smartphone's operating system, while often desired for various reasons, is a complex process fraught with potential risks. The curing time depends on the glue's type, thickness, and the UV lamp's intensity. Displays (LCD/OLED): These are perhaps the most common, ranging from poor-quality LCDs marketed as OLED to screens with incorrect color calibration, dim backlights, or unresponsive touch. Liquid Damage: Corrosion can create unintended conductive paths, leading to constant power draw and localized heating. While not a critical function for smartphone operation, a working LED notification light enhances convenience and user experience, making its diagnosis a valuable troubleshooting skill.### 9. This is crucial for maintaining the phone's dust and splash resistance. Safe Mode (Android): Booting into Safe Mode disables all third-party apps. Clear Cache Partition: In recovery mode, select "Wipe cache partition." This often resolves boot loops without data loss. Photos might appear as grey squares, videos might not play, and documents might become inaccessible. Some users attempt to remove, replace, or dry out LCIs to bypass warranty exclusions. Voiding Warranty: Unlocking the bootloader (often a prerequisite for flashing) and flashing non-official firmware almost always voids your manufacturer's warranty. Short Circuit: An internal short on the mainboard can cause excessive power drain. Power on the phone and perform a comprehensive test of all camera functions (photo, video, front camera, specific modes like portrait/slow-mo), and other phone functionalities (Wi-Fi, cellular, speakers, etc.) to ensure nothing was inadvertently damaged or left disconnected. Desoldering Braid/Wick Application: An iron is used with desoldering braid to absorb molten solder, effectively cleaning pads or removing excess solder from joints. A healthy ground connection should show a very low resistance, typically less than 1-2 Ohms. ESD Protection: If you need to open the phone, wear an anti-static wrist strap. Motherboard Issue: If multiple replacement coils fail, and the flex cable is confirmed good, the issue might lie with the wireless charging controller IC on the motherboard. It's an excellent choice for textured plastic backings or when maximum material preservation is paramount, though it might leave a citrus scent. Prioritize safety to prevent injury and further damage to your device: Display too bright/dim: The screen consistently displays inappropriate brightness levels for the ambient lighting. No Power/Boot: If a critical power line via is damaged, the device may not power on.

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