[SOLVED] I'm looking for BEDOVE X6B repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my BEDOVE X6B. 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.

@Kerstin

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 BEDOVE X6B 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/527934/2008+Dodge+Charger+Won%E2%80%99t+charge
Take a look at comment #13
Also, this : https://xdaforums.com/t/t-mobile-ota-update-issue.3960644/.
You can also check this video starting from minute 3:

The BEDOVE X6B 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 BEDOVE X6B 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 BEDOVE X6B 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 BEDOVE X6B 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://www.ifixit.com/Guide/Google+Pixel+8a+Front-Facing+Camera+Replacement/173113

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

Before delving into board-level repair, rule out the most common and simpler issues: Ensure "Vibration for calls," "Vibration on touch," or "System haptics" are enabled. Differentiate Scratch Depth: These methods are only for minor, superficial scratches that you can barely feel with your fingernail. iPhone Touch ID (Home Button): If the home button flex cable is torn, but the actual sensor chip (often located on the back of the home button) is intact, it might be possible to microsolder the original sensor chip onto a new home button flex cable. Isopropyl alcohol (IPA) and lint-free cloths will be used for cleaning. Evaluating smartphone touchscreen multi-touch errors is therefore a vital diagnostic step for identifying hardware malfunctions, software glitches, or calibration issues that undermine this core functionality. Damaging Pins: The tiny metal pins inside ports are extremely fragile and can be easily bent, broken, or shorted by metallic or overly forceful tools. Ineffective Desiccation: Rice absorbs surface moisture, but it's largely ineffective at drawing out moisture from inside the phone, especially from under ICs, connectors, or within multi-layered boards where liquid might be trapped by capillary action. Use a hot air rework station with appropriate temperature (typically 300-350°C for lead-free solder) and airflow settings. Automated and Comprehensive Testing: Performs multiple tests rapidly across various hardware components, saving significant manual diagnostic time. Facial Recognition Test: If applicable, try to set up or use Face ID/facial unlock. Strong Adhesive: Manufacturers use powerful adhesives to bond the glass panel to the phone's frame, often making it difficult to separate without proper heat. Ensure this feature is disabled or set to a neutral schedule when you're trying to achieve accurate colors. ADB and Fastboot Drivers: For your PC to communicate with the phone in Fastboot, the correct Android Debug Bridge (ADB) and Fastboot drivers must be installed. Transfer Components: Many replacement display assemblies do not come with essential components like the home button/fingerprint sensor, front camera, earpiece speaker, or ambient light/proximity sensors. A solid understanding of communication protocols and component functions is essential for successful diagnosis and repair.How to inspect smartphone vibration motor mounts For instance, if one SIM is set to "LTE/CDMA auto" and the other to "GSM/WCDMA auto," ensure both are appropriate for the respective carriers. Enable Pixel Shifting (if available): Some devices automatically subtly shift pixels periodically to spread wear evenly. Replacing the secondary noise-canceling microphone is a valuable repair for restoring call clarity and audio quality to your smartphone. Isopropyl Alcohol (IPA): High purity (90% or higher) is the most common and generally safe cleaner for electronic boards. There should be no gaps, and it should blend seamlessly with the phone's contour. Coil whine often originates from specific components on the motherboard, so listening carefully to different parts of the phone can help localize it. Associated Passive Components: Like any complex circuit, the NFC controller requires a network of resistors, capacitors, inductors, and filters to stabilize power, filter signals, and ensure proper impedance matching for the antenna. They connect to the main logic board via coaxial cables (often called antenna cables or RF cables) or directly through spring contacts. Smartphones typically have multiple microphones for different functions: Any non-functional component or intermittent issue indicates a missed connection, a faulty transferred component, or accidental damage during the repair. How to diagnose a smartphone with a completely black screen but functional touch. Securing smaller internal components like camera modules, flex cable brackets, and speaker grilles. Flux Application: Apply a liberal amount of high-quality liquid flux along the entire interposer seam where the two boards meet. Battery Reconnection: Reconnect the battery flex cable and secure its bracket.

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