[SOLVED] I'm looking for Oppo Reno11 China repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Oppo Reno11 China. 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.

@Austin

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 Oppo Reno11 China 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/Anki+Cozmo+Battery+Replacement/146656
Take a look at comment #1357
Also, this : https://www.ifixit.com/Answers/View/777209/Why+is+my+laptop+running+slow.
You can also check this video starting from minute 1:

The Oppo Reno11 China 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 Oppo Reno11 China 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 Oppo Reno11 China 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 Oppo Reno11 China 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/apps-to-disable-for-pure-android-experience.2948796/

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

Following strict safety guidelines is not only about protecting yourself but also about preventing further damage to your device. The putty's adhesive quality will effectively lift out stubborn dirt, grime, and compacted lint. Additionally, if certain components are replaced, particularly those with coils or small motors (like vibration motors or speakers), their inherent magnetic properties or slight positional changes can introduce new magnetic interference. Ensure your phone is charged to at least 50-70% (preferably 100%) before attempting an update. Faulty PMIC (Power Management IC): The PMIC is responsible for power distribution. Factory Reset: As a last resort for software issues (backup data first!), a factory reset can rule out OS-level corruption. If your audio works in Safe Mode, a recently installed app is likely causing a software conflict. The analysis typically involves capturing raw data under controlled conditions and then applying statistical methods. If you suspect a motherboard issue, it is highly recommended to seek a professional repair service that specializes in micro-component repairs, as attempting it yourself without the proper tools and expertise can lead to irreparable damage. Rogue Applications: Apps consuming excessive CPU resources in the background can draw more power than the charger can supply, leading to a net discharge even when plugged in. A dot roughly the size of a grain of rice or a very small pea is usually sufficient. In conclusion, evaluating smartphone sensor calibration issues requires a methodical process. Check battery usage statistics in settings to identify any power-hungry apps. While this is not a definitive test for water resistance, it indicates proper assembly. Fine-Tip Tweezers: Essential for manipulating the chip, solder balls, and stencils. Connect to PC: Plug your phone into your computer using a reliable USB cable. When this sensor malfunctions, the device’s ability to perform these functions can be severely impaired, necessitating a replacement. This should only be attempted if you have the correct tools, experience, and knowledge of your specific phone model's disassembly procedure. If the screen is severely cracked, covering it with packing tape first can help maintain its integrity during removal. The primary challenge with super glue on a smartphone lies in the diverse materials used in modern casings: glass, various plastics (polycarbonate, ABS, PMMA), anodized aluminum, stainless steel, and even ceramic or composite elements. The digitizer flex circuit is a critical component responsible for transmitting touch input from the smartphone screen to the device's logic board. Inspect the new solder joints under the microscope for any bridges or poor connections. Testing: Reassemble the phone enough to test if it powers on and functions correctly. Try a Different Computer: If possible, try connecting your phone to a different computer. Sensors Not Working: Proximity sensor, ambient light sensor, gyroscope, etc., fail. Use a field test mode (dial ##4636## on many Android phones) to view detailed signal strength information (dBm values). Protect the screen: Consider covering the front screen with painter's tape or masking tape to prevent accidental scratches or damage during the process. Work slowly and carefully, constantly monitoring for any signs of resistance or changes in the battery's shape. If it reads a very low resistance (near 0 ohms), there might be a short within the speaker, also indicating a fault. Speaker distortion manifests as crackling, buzzing, muffled audio, or a general lack of clarity that wasn't present before.

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