[SOLVED] I'm looking for Blackview A80 Pro repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Blackview A80 Pro. 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.

@Kathy

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 Blackview A80 Pro 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/684753/water+dripping+from+detergent+tray
Take a look at comment #939
Also, this : https://www.ifixit.com/Answers/View/879493/How+to+fix+a+scratch+lens.
You can also check this video starting from minute 10:

The Blackview A80 Pro 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 Blackview A80 Pro 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 Blackview A80 Pro 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 Blackview A80 Pro 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/android-web-browser-test-xoom-adam-nexus-s.984490/

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

Frequent App Crashes: Apps suddenly close without warning, or consistently fail to launch. Flex Cable Integrity: If the microphone is on a flex cable (e.g., charging port flex for the primary mic, front sensor flex for a secondary mic), inspect the flex for any damage. Compatibility: Double-check that the camera module is the correct model for the specific phone. Locate Bottom Module Screws: This module is typically secured by fewer screws, often only 2-4 Phillips screws, usually located around the USB-C port. Often, it's a temporary glitch caused by an app misbehaving, consuming too many resources, or entering an infinite loop. Using the microscope, precisely align the newly formed solder balls on the IC with the corresponding pads on the motherboard. Use precision screwdrivers to remove the screws securing these shields. Bending/Deformation: Can put stress on the screen, battery, and motherboard, potentially causing further damage. Analyzing smartphone storage performance drops requires a systematic approach, combining user observation, software tools, and diagnostic tests. Fortunately, many instances can be resolved with simple external cleaning and troubleshooting. Systematically uninstall recently installed or suspicious apps to identify the problem. Play a music track with prominent bass and try covering one speaker at a time. Water damage, drops, or excessive heat can cause solder joint issues, internal chip damage, or component failure. Carefully touch the black probe to each pin on the motherboard's display connector. Plastic Spudgers and Opening Picks: For safe disassembly and disconnecting/reconnecting flex cables. It allows technicians to not only identify obvious cosmetic issues but also to uncover hidden structural weaknesses that could lead to more severe problems down the line, ensuring a more robust and reliable repair.## 8. The "Baseband version" in your phone's settings indicates the firmware running on this processor. SIM trays vary significantly in size, shape, and design between manufacturers and even models. Loose Connectors: Ensure the tiny snap-on connectors are securely attached to their respective ports on the logic board and antenna modules. However, there are several scenarios where its reapplication becomes necessary: The problem can stem from various sources, making systematic troubleshooting essential. Errors can manifest immediately during flashing or after the process is seemingly complete. This process requires attention to detail, the right materials, and a systematic approach. If not, power down immediately and re-inspect your work under the microscope for any missed connections, cold solder joints, or bridging. If the new screen works perfectly: The original screen assembly (digitizer, display, or flex cable) was indeed faulty and needs replacement. Second End: Position the other tinned end of the jumper wire onto your pre-tinned destination point and solder it securely. If the network functions correctly and the IMEI matches, the reprogramming was successful. Despite their vital role, these coaxial cables are often incredibly thin and fragile, making them susceptible to physical damage during drops, repairs, or even manufacturing defects. They may be labeled with "TP" followed by a number (e.g., TP101) or a descriptive name on schematics, though they are often unlabeled on the physical board. These cables often run along the frame or are integrated into a larger flex cable near the bottom or top of the phone.

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