Forum Phones & Tablets Repair
Discussion Starter - #1 - 1 week ago

Hi,

I'm hoping you can help me out with my Oppo Reno10 Pro 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.


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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.



>>>> Oppo Reno10 Pro China maintenance guide & schematics (pdf + fz)

Good luck

Discussion Starter - #3 - 1 week ago

@Christine

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 Reno10 Pro 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/Answers/View/351486/Why+is+my+tablet+not+charging
Take a look at comment #1136
Also, this : https://www.ifixit.com/Answers/View/528055/Screen+black,+but+connectable+to+iTunes.
You can also check this video starting from minute 8:


The Oppo Reno10 Pro 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 Reno10 Pro 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.



emoji scratching head

My Oppo Reno10 Pro 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 Reno10 Pro 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/lg-p725-3d-max-android-upgrade.1824231/

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

Step-by-Step Repair Process (General Guide - Specifics Vary by Phone Model): Precision Screwdriver Set & Plastic Pry Tools: For disassembling the phone. Current Spikes Briefly then Drops to 0mA: The PMIC starts to initialize but immediately shuts down, often due to a "secondary short circuit" (a short on one of the PMIC's output rails) or a major component failure (e.g., CPU, eMMC). Cases: Some thick or metallic phone cases can interfere with GPS signals. You may want to use small clamps or rubber bands (applied gently around the phone) to hold the new glass in place for a few hours while the adhesive cures completely. Connector Damage: Check the connector where the NFC flex cable plugs into the motherboard or another flex cable. Lifting/Removing Components: Depending on the phone, you might need to remove the speaker assembly, the charging port assembly, or even partially lift the motherboard itself to access the headphone jack assembly. Remove these screws meticulously, using your magnetic mat or tray to keep track of their exact locations. Scenario 1: Damage to the Wireless Charging Coil Flex Cable or its Connector (Coil Side) Thermal Runaway/Failure: In severe cases, uncontrolled overheating can lead to physical damage to the chip or its solder connections, resulting in total device failure. The process of accessing and replacing the antenna window often begins with opening the smartphone, which typically involves removing the display or the rear glass panel. This often manifests as read/write errors that prevent any software installation or decryption from succeeding. However, it is a crucial repair that restores the structural integrity of the phone, ensures proper component alignment, and can prevent further, more severe damage. Fingerprint Sensor Failure: The fingerprint sensor associated with the button stops working, or repeatedly fails to recognize fingerprints, even if the button's navigation function still works. Burn-in / Ghosting (OLED only): A faint, persistent image (e.g., keyboard, status bar icons) visible even when the screen content changes. For iPhones, the display assembly opens from right to left like a book. Fortunately, replacing a smartphone battery is one of the most common and often straightforward DIY repairs, allowing you to significantly extend the life of your device without incurring the cost of a new phone or professional service. Before fully reassembling your phone, itโ€™s highly recommended to perform a preliminary test. Use a high-quality microfiber cloth and a screen cleaner (if necessary) to remove all smudges, fingerprints, and surface dust. The consequences of misusing a customer's passcode or violating their privacy are severe: Inspect the charging port, headphone jack, and SIM card tray opening for signs of corrosion (green, white, blue powdery residue). Cleaning: If only dirt or minor corrosion is present, clean the connector thoroughly with isopropyl alcohol and a fine brush. Tactile Confirmation: Gently press down on the center of each flex cable connector with a plastic spudger. Significant non-zero readings while still indicate a faulty or uncalibrated sensor. Locate the battery connector on the motherboard and use a plastic spudger to carefully pry it upwards and disconnect it. Broken Pins: If pins are bent or broken, the connector itself might need to be replaced, which is a micro-soldering job. Once the solder around the anchor pins (mechanical attachment) begins to melt, gently lift the old connector straight up with tweezers. Physical Damage: A drop or impact could damage the digitizer layer of the screen, leading to unresponsive areas or inaccurate touches. Short Circuit on a Backlight Line: Inject voltage to locate the shorted component (e.g., capacitor) and replace it. Heat Gun or Hot Air Rework Station: Crucial for softening adhesive on screen assemblies or back covers, and indispensable for desoldering soldered ports.

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