[SOLVED] I'm looking for Oppo Reno5 K repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Oppo Reno5 K. 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.

@Med

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 Reno5 K 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/How+To+Replace+The+Clutch+In+Your+Blender/181831
Take a look at comment #1470
Also, this : https://xdaforums.com/t/fake-temple-run-hits-the-market.1516483/.
You can also check this video starting from minute 9:

The Oppo Reno5 K 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 Reno5 K 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 Reno5 K 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 Reno5 K 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/q-wm-6-5-x-exchange-sync-click-to-download-the-rest-of-this-message-problem.913057/

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

Case Test: If the issue isn't extreme without a case, re-test with your phone case. In conclusion, evaluating smartphone audio echo issues requires a methodical process of elimination, moving from simple accessory removal and environmental checks to thorough physical inspections and advanced software diagnostics. Symptoms of Bad Battery: Rapid draining, sudden shutdowns, or a very old battery can sometimes present as charging failures. Modem Firmware: Sometimes, a phone's modem firmware (updated through OS updates) can enable dormant bands or improve compatibility. If reflowing fails or the IC is visibly damaged, replacing the IC is the final option. Initial Gentle Pressure: Once aligned, gently press the display/back panel into place around the entire perimeter. If the phone restarts even after a factory reset, it strongly points towards a hardware problem. Photos/Videos: Take clear, timestamped photos or a video of the device from all angles (front, back, sides, corners) showing its exact condition upon receipt. Remove the logic board from the phone chassis, placing it on an ESD-safe mat. A simple reboot can often clear temporary software glitches that might be affecting microphone or voice processing. ESD-Safe Brushes: Stiff-bristled brushes (natural or synthetic) are essential for scrubbing away softened residue. Reballing the Chip: Apply fresh solder paste to the baseband chip and use a reballing stencil to form new, perfectly spherical solder balls. Flex Cables: Verify that all flex cables (especially the display and digitizer cables) are neatly routed in their designated channels and are not pinched or bulging in any way. The first step in a visual inspection is to look at the flex cable itself. "Failed to flash" errors: Double-check the file integrity (MD5 checksum) and ensure the file is compatible with your device. Look for options like "LED indicator," "Pulse notification light," or "Notification light." Ensure this feature is enabled. Manufacturing Defects: Although rare, faulty assembly or weak components can lead to premature OIS failure. Visual Inspection (External): Look for signs of water damage (corrosion), burn marks, or discolored components around the PMIC (Power Management IC) area. Plastic spudger tools: Essential for prying and disconnecting delicate flex cables without causing damage. New Fuse: Critically, the new fuse must have the correct current rating and voltage rating for the circuit it protects. Personal Files: Photos, videos, documents (PDFs, Word files, spreadsheets), music, voice recordings. Remove All Internal Components from the Old Frame: This is the most extensive part. This involves applying new, perfectly formed solder balls to its underside using a stencil and solder paste, similar to CPU reballing. Touch IC/Baseband IC Repair: Specific ICs responsible for touch functionality or cellular communication can fail. Use a plastic spudger to carefully pry up and disconnect the battery flex cable. Heat the Edges: Using your heat gun or hair dryer on a low-to-medium setting, gently warm the edges of the back cover. Process Data: Once the dump is complete, you will have a raw binary file (often .bin, .img). Corroded Pads: Liquid damage can cause oxidation, eating away at the copper pad, making it impossible to solder to. Use tweezers to meticulously pick out every tiny shard of glass from the frame and any internal components. Before fully closing the phone: Reconnect the battery and any essential components (like the display assembly).

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