[SOLVED] I'm looking for IBERRY Auxus AX02 repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my IBERRY Auxus AX02. 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.

@Paul

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 IBERRY Auxus AX02 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/471487/My+iMac+randomly+powers+down
Take a look at comment #1466
Also, this : https://www.ifixit.com/Answers/View/613288/Why+does+my+hisense+tv+turn+on+with+back+light+but+had+not+display.
You can also check this video starting from minute 1:

The IBERRY Auxus AX02 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 IBERRY Auxus AX02 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 IBERRY Auxus AX02 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 IBERRY Auxus AX02 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/751443/Why+can't+it+start

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

Known-Good Display Assembly: Absolutely critical for ruling out a faulty screen. A critical component of this system, especially for cellular and Wi-Fi, is the internal coaxial cable. Install Battery: Reinstall the battery with new adhesive, ensuring it sits flat and secure. It's important to differentiate RAM-related issues from other common problems: A reliable cellular connection is fundamental to the modern smartphone experience. Clean Area: Clean any old adhesive residue from the phone's frame where the new module will sit. Other indicators might be a garbled or distorted image, vertical or horizontal lines across the display, a flickering screen, or a display that shows only a backlight without any actual image content. Heat Management: Practice on scrap boards to get a feel for your hot air station's settings. Screen Stays Off After Calls: After you move the phone away from your ear at the end of a call, the screen remains black and unresponsive. If no continuity, systematically probe along the trace (if visible) to narrow down the exact location of the break. Suction cup and heat gun/hair dryer: To soften adhesive for screen/back panel removal. Movement/Wiggle: Gently press on different sections of the frame, particularly near the screws. Charging IC / Tristar IC (for iPhones): iPhones, in particular, often have a specific charging IC (commonly called Tristar or U2 IC) that, when damaged, prevents charging. Anti-Reflective Polarizers: These are linear or circular polarizers with additional anti-reflective coatings applied to their surface. This problem can range from a minor software glitch to a significant hardware failure. Set the current limit to a safe, relatively high value (e.g., 3A or 5A) to avoid false trips from minor spikes, but be ready to observe. Screen separation issues point to poor adhesive application or curing. Battery Degradation: Prolonged exposure to high temperatures accelerates battery aging, reducing its overall capacity and lifespan. Ground planes act as shields, absorbing and reflecting EMI, effectively isolating sensitive signals. Remove Old TIM: Gently scrape off old thermal paste with a plastic tool, then clean the area thoroughly with IPA and a lint-free cloth. This problem can severely impact your phone's usability, potentially leaving you with a dead battery at critical moments. This component efficiently converts the incoming VBUS voltage (which can vary) into the precise charging voltage and current required by the battery, which typically operates within a narrow voltage range (e.g., 3.7V nominal, charging to 4.2V or 4.35V). Ensure the flex cable is properly routed and secured to prevent it from vibrating against other components. With the tray removed, use your magnifying glass and flashlight to look directly into the SIM slot opening on the phone's frame. Functionally, dust particles rarely cause performance issues unless they are conductive (like metallic shavings) and large enough to bridge circuits, which is exceedingly rare. Water Damage: Liquid ingress can cause corrosion and short circuits, leading to various electrical issues, including anomalous power consumption. These pins transmit vital data and power signals, and if even one is bent, broken, or corroded, it can lead to a myriad of display issues: flickering, colored lines, sections of the screen not responding, a completely blank screen, or ghosting. If this combination works when the regular power button press doesn't, it indicates an issue with the power button's direct electrical pathway or a minor software glitch, rather than a catastrophic PMIC failure. Install Components onto New Screen: Carefully transfer each component to its corresponding location on the new screen. Make sure the phone is not on silent or vibrate mode, though this usually affects notifications, not media.

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