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

Hi,

I'm hoping you can help me out with my IPRO Speed X. 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.

@Fabien

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 IPRO Speed X 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/q-no-root-with-neak-kernel.1497375/
Take a look at comment #216
Also, this : https://www.ifixit.com/Answers/View/432347/My+display+is+not+turning+on..
You can also check this video starting from minute 2:

The IPRO Speed X 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 IPRO Speed X 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 IPRO Speed X 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 IPRO Speed X 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/solved-cant-enter-download-mode-in-samsung-a90.4234813/

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

Bending a smartphone frame back into alignment is a delicate operation that carries significant risks. Accurately assessing the root cause of these fluctuations is key to effective troubleshooting. Always proceed with caution and refer to specific guides for your device model. Understand the Symptom: Based on the phone's fault (e.g., no charging, no backlight), narrow down the possible circuits where a fuse might be located. Enhanced GPS Accuracy: Assisting GPS systems to quickly determine vertical position, improving overall location accuracy. It comes from devices not directly related to Wi-Fi or Bluetooth but that emit electromagnetic radiation on or near the 2.4 GHz or 5 GHz bands. Heat Gun or Hair Dryer: To loosen adhesive holding the screen or back cover. Power it back on, and as the manufacturer's logo appears, press and hold the Volume Down button until the phone fully boots. Sufficient Battery Life: Ensure your phone is at least 30-50% charged to prevent any interruptions during the process. However, this process demands a high level of technical skill, precision micro-soldering, and a deep understanding of smartphone architecture and file systems. If they are bent, broken, or pushed down, they won't make proper contact with the SD card. Clean the Area: Use a cotton swab with a small amount of isopropyl alcohol to clean any debris, old adhesive, or dust from the area where the mount sits. Image stabilization typically comes in two forms: Optical Image Stabilization (OIS) and Electronic Image Stabilization (EIS). They are specifically shaped to fit the perimeter of your exact phone model, making application much easier and more precise. However, by carefully following a model-specific guide, organizing every single screw, taking your time, and prioritizing safety, you can successfully transfer all your phone's components to a fresh, undamaged chassis. This stage requires opening the device and using a DC power supply, microscope, and schematic/boardview. This tactile response is typically generated by a tiny spring or a dome switch mechanism located beneath the button cap, often integrated into a larger flex cable assembly. Use new adhesive strips or liquid glue (sparingly and correctly) for the screen and back cover to ensure a strong seal and renewed structural integrity. This gradual heating also prepares the solder for a smoother transition to its molten state. Software Reset: A factory reset can sometimes resolve persistent software-related tuning issues, but it should be a last resort due to data loss. The first and most time-consuming step is to safely dismantle your smartphone to gain access to the power button flex cable. Plastic Spudgers & Pry Tools: For safely separating components and disconnecting flex cables. Once all components have been painstakingly removed, you will be left with the damaged plastic mid-frame, ideally bare. Speed Test Apps: Use reliable speed testing apps like Ookla Speedtest or Fast.com. The traces and components are often too small to see clearly with the naked eye. Reduced Reliability and Lifespan: Corrosion and electrical leakage contribute to premature component failure and a reduced overall lifespan for the repaired device. Symptoms like poor battery life, unexpected shutdowns, slow performance, or a visibly swollen battery are clear indicators that it's time for a replacement. Verify Solder Joints: After removing heat, allow the board to cool naturally. When you hold the phone to your ear during a call, the screen remains active, leading to accidental touches. High battery usage often correlates with high CPU activity and heat generation.

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