[SOLVED] I'm looking for IKOMO iK101 repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my IKOMO iK101. 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.

@Sumit

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 IKOMO iK101 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/895693/Google+watch+submerged+in+the+water
Take a look at comment #1596
Also, this : https://www.ifixit.com/Answers/View/798569/Why+does+my+tv+alarm+start.
You can also check this video starting from minute 3:

The IKOMO iK101 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 IKOMO iK101 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 IKOMO iK101 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 IKOMO iK101 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/want-to-backup-just-game-saves.3738788/

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

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. Manufacturing Defects: Less common, but a faulty digitizer from the factory or a poor-quality replacement screen. Apply it along the curved edges with utmost care, maintaining a consistent line. Using magnetized screwdrivers, placing the phone on a magnetic mat, or even handling components near strong magnetic fields can temporarily magnetize internal ferrous components or simply confuse the sensitive magnetometer chip. Diagnosing poor voice recognition accuracy starts with simple environmental checks and progresses through software troubleshooting. Always remember to prioritize data backup before attempting any method that might involve data loss. Another clue is intermittent functionality, where a component works sometimes but not others, or only when the phone is held in a specific way. Safety for the Technician: Proper tools reduce the risk of injury to the repair technician. Enamel-Coated Jumper Wire (thin gauge): Extremely fine magnet wire (e.g., 0.01mm - 0.05mm) for creating new traces. Thermal pads excel at filling larger, inconsistent gaps, or when there might be slight variations in component height. Identifying the Correct Chip: Without schematics, locating the specific IMU chip can be nearly impossible. Use a non-conductive tool (like a toothpick) or compressed air to clean it. Using a plastic spudger or thin plastic card, gently pry or peel the old flex cable away from its seating. The process will involve opening your phone, which typically means removing the back cover or, less commonly, the screen. Heat guns or hot plates may be needed to soften adhesive holding the screen or back cover. Repairing these buttons usually involves replacing this entire flex cable, a process that can range from relatively straightforward to quite intricate depending on how deeply embedded the flex cable is within the phone's design. Set your hot air station to the appropriate temperature and airflow (typically 320-360°C with moderate airflow, adjust based on your station and solder type). Component Seating: Verify that any new or removed components (e.g., battery, camera modules, daughter boards) are properly seated and secured. LCD panels themselves do not emit light; they act as a shutter, controlling which pixels allow light to pass through from a separate backlight unit located behind them. Locate Battery Adhesive Tabs: iPhones typically use black adhesive pull tabs underneath the battery. Power Management IC (PMIC) Fault: As detailed in Topic 8, the PMIC is critical. Micro-soldering: Repairing a damaged motherboard connector or a related component requires advanced micro-soldering skills, a microscope, and specialized tools. When one or both of these speakers fail, the audio experience is severely degraded, necessitating a replacement. Many DIY scratch repair methods involve abrasives or chemicals that can strip away these coatings, making your screen more susceptible to fingerprints, smudges, and potentially even more scratches in the long run. Isopropyl Alcohol (IPA): High-purity (99%+) for cleaning flux residue. Update iTunes/Finder: Ensure you are running the latest version of iTunes (for Windows and older macOS) or Finder (for macOS Catalina and later). Age: Older devices are more susceptible as corrosion can build up over time. Remove any metal shields covering the display and digitizer flex cable connectors. Missing Components: Small capacitors, resistors, or filters might be knocked off their pads. Always consult a specific guide for your phone model and chosen flashing tool before proceeding.

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