[SOLVED] I'm looking for AK Mobile AK M700 repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my AK Mobile AK M700. 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.

@Belinda

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 AK Mobile AK M700 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/Wiki/Beats_Headphones_Will_Not_Turn_On
Take a look at comment #1117
Also, this : https://www.ifixit.com/Answers/View/865146/Upper+let+corner+of+left+stick+doesnt+respond+properly.
You can also check this video starting from minute 2:

The AK Mobile AK M700 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 AK Mobile AK M700 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 AK Mobile AK M700 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 AK Mobile AK M700 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/810955/Amana+Tandem+7300+Water+out+pump+keeps+blowing

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

Conversely, if both agree on high temperatures, the issue is actual overheating, and the sensor is likely functional. Brushes: Anti-static brush, soft-bristle brush (e.g., old toothbrush) for scrubbing. The allure of vintage or older smartphones extends beyond mere nostalgia; it taps into an appreciation for design, engineering, and a simpler era of mobile technology. Check for Malware: Run a reputable antivirus scan, especially if you've installed apps from outside official app stores. Impact Damage: A drop can dislodge internal components within the camera module, damage the OIS/AF mechanism, or even break internal connections. Bad Update: An over-the-air (OTA) update that goes wrong can leave the device unbootable and in EDL. Dust: Work in the cleanest possible environment to avoid dust contamination under the new glass. Unscrew the tiny Phillips screws holding this shield and carefully remove it. Verify that the display, touch screen, cameras, charging, and all buttons are working as expected. Here's a comprehensive guide to situations where declining a smartphone repair is the most ethical and responsible course of action. False Positives (Humidity): While direct liquid contact is the primary trigger, prolonged exposure to extreme humidity can sometimes cause a partial color change. Final Test: Power on the phone and test the camera thoroughly by taking photos in different lighting conditions to ensure there are no new spots, blurs, or focus issues. This is usually confirmed by ruling out the RAM/NAND itself or via specific manufacturer diagnostic codes. For larger cracks or small missing pieces: Use a plastic-specific filler or a small amount of clear epoxy. However, be aware this will likely trigger FRP/iCloud locks if not already removed. This debris prevents the charging cable from fully seating, leading to a poor connection and a "loose" feeling. Reinstall Securing Components: Replace any metal brackets and screws that were removed earlier to secure the assembly. Excessive Wobble: A loose fit indicates a worn or deformed outer shell, a damaged central tongue (USB-C), or worn internal retention clips. This guide will meticulously outline the potential reasons behind this message, provide a systematic diagnostic approach, and detail the repair steps, ensuring your smartphone regains reliable power and charging capabilities. Time-Consuming: The process is much longer and requires meticulous attention to detail at every step. It typically sits behind a small translucent window on the phone's front bezel. These documents help pinpoint the exact location of the magnetometer IC, its power rails, data lines, and surrounding components, allowing for precise voltage and continuity checks. While true "digitizer calibration" apps (common for older resistive touchscreens) are less prevalent for modern capacitive screens, some "touch screen test" apps can help visualize touch points and responsiveness. By systematically testing different scenarios and isolating variables, you can accurately pinpoint the source of the echo and determine the most effective course of action to restore clear communication.Inspecting smartphone front sensor cluster alignment is a critical step in diagnosing a variety of functional issues, from unreliable face unlock to malfunctioning auto-brightness and proximity detection. Re-evaluate if the bend is necessary, or if you're approaching it incorrectly. Test with Speakerphone/Headphones: Make a call and switch to speakerphone or use wired/Bluetooth headphones. High, Unstable/Pulsing Current: Could be a short or a component repeatedly activating and deactivating OCP. Try pressing the volume up button (some phones let you adjust brightness with volume keys on a dark screen) or accessing control center/quick settings (if you can faintly see it). Diagnosis: Visually inspect the port for debris, corrosion, or bent pins. Idle or Light Use: If the phone overheats while idle or performing only light tasks, this is a significant red flag.

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