[SOLVED] I'm looking for Motorola Moto 360 42mm repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Motorola Moto 360 42mm. 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.

@Layla

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 Motorola Moto 360 42mm 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/HP+Elite+x2+1012+G2+SSD+Replacement/107935
Take a look at comment #682
Also, this : https://xdaforums.com/t/xap-new-way-of-getting-files-into-file-explorer.1402932/.
You can also check this video starting from minute 7:

The Motorola Moto 360 42mm 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 Motorola Moto 360 42mm 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 Motorola Moto 360 42mm 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 Motorola Moto 360 42mm 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/572844/Replaced+PSU,+but+now+makes+buzzing+noise

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

Black Image: Simply download a pure black image and view it full-screen in your gallery. This reaction causes the liquid resin to solidify, or "cure," almost instantly. Clearing the system's cache partition (via recovery mode) can also resolve minor inconsistencies. This step requires specialized tools (pentalobe screwdrivers, spudgers, heat guns for adhesive, etc.) and knowledge of the specific phone model's teardown procedure. Carefully pry open the device using a suction cup and plastic opening tools. Internal Lens Elements: Less commonly, dust can get between the individual lens elements within the camera module. If, after all these software troubleshooting steps, your smartphone still consistently fails to discover or connect to any Bluetooth devices, or exhibits extremely poor range, it's time to consider a hardware issue, specifically a potential antenna break. Press and hold `Power + Volume Up` until the Google logo appears, then release. Charging Port Flex Cable Damage: Many phones have the charging port on a separate flex cable that connects to the motherboard. Damaged Accelerometer Sensor: Like the gyroscope, the accelerometer is a delicate Micro-Electro-Mechanical System (MEMS) chip on the phone's motherboard. Advanced Logic Board Diagnostics (Requires Schematic/Multimeter/Microscope): Typically, you will apply a few drops of the oleophobic liquid onto the screen. Solder Joint Issues: Cold solder joints, lifted pads, or solder bridges (short circuits between pads) are common under ICs. By following these steps, you can accurately diagnose whether your sensor issues are a minor glitch or a more significant hardware problem requiring professional intervention.9. Never apply excessive force, which could damage the frame or internal parts. Connect New Display: Reconnect the display, digitizer, and any other necessary flex cables to the logic board. Camera Application Usage: The camera module and its associated image signal processor (ISP) can draw significant power, particularly during video recording, using advanced camera features (like optical image stabilization, specific filters), or while the flash is charging. BGA Reballing Stencils and Solder Paste: Specific to the baseband chip. Thin metal pry tool or guitar pick: For separating adhesive-sealed screens or back covers. For batteries secured with adhesive, ensure they are seated firmly and flat within the phone's frame. Brominated Flame Retardants (BFRs): Used to prevent fires, BFRs are persistent organic pollutants (POPs) that bioaccumulate in the environment and food chain. Once the adhesive is sufficiently loose, gently open the screen, typically like a book, to reveal the internal components. Hold the power button and slide to power off, or select "Power Off" from the menu. This often means temporarily moving them out of the way or carefully folding them. General Steps for Flashing Stock Firmware (Example using Odin for Samsung): Wear and Tear: Repeated thermal expansion and contraction, or frequent opening/closing of the device (if applicable), can cause fatigue over time. This requires referring to the boardview to identify where traces should connect. Standard Smartphone Disassembly Tools: Pentalobe, Phillips, Tri-wing screwdrivers, spudgers (plastic and metal), suction cup, heat gun (optional, for adhesive). If a new display still exhibits the same issues, the focus shifts to the motherboard and potentially the display driver IC. Solder Jumper: Carefully solder one end of the jumper wire to one side of the broken trace, then the other end to the opposite side, bridging the gap.

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