[SOLVED] I'm looking for ARISE A-50 repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my ARISE A-50. 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.

@Eddie

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 ARISE A-50 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://xdaforums.com/t/nexus-7-v2-boot-loop-please-help.3253012/
Take a look at comment #1658
Also, this : https://xdaforums.com/t/first-time-with-the-xoom.999016/.
You can also check this video starting from minute 5:

The ARISE A-50 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 ARISE A-50 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 ARISE A-50 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 ARISE A-50 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-extreme-stutter-on-front-camera.2927986/

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

Clean the board thoroughly with IPA, especially if there's any sign of liquid damage. Troubleshooting "No Service" or "Searching" is complex due to the interconnectedness of hardware and software. If there are damaged pads, repair might be necessary (micro-jumpers), adding another layer of complexity. Inspection: Under the microscope, meticulously inspect all solder joints for good contact, no bridges, and proper alignment. Other types, like rosin-based or water-soluble, are generally avoided due to the difficulty of thorough cleaning and potential corrosive residues. These heavy-duty fixtures apply controlled, even pressure to bend the frame back into shape, ensuring new screens or back panels fit perfectly. The internal pressure might make opening the phone more difficult than usual. Faulty Wi-Fi/Cellular Antenna: Physical damage to the phone's internal Wi-Fi or cellular antennas can cause weak signals and instability. Always prioritize data backup, understand the specific risks for your device model, and proceed with caution.9. Software-Related: The button works physically, but the phone doesn't react as expected. Disconnect the Battery: Once the screen/back is partially open, locate the battery connector on the logic board. Clear App Caches: Navigate to `Settings > Apps & notifications > See all apps`. Remove Damaged Part: Carefully detach the damaged NFC coil, which might involve unscrewing it, prying it off adhesive, or disconnecting its flex cable from other components. Oleophobic coating kit (typically includes a liquid coating, applicator cloths/pads, and cleaning wipes). Charging Habits: Avoid heavy use while charging, especially fast charging. The phone should now recognize the microSD card and display its capacity. They can offer excellent value, providing near-OEM performance at a lower cost. Its placement within the smartphone is critical for optimal performance and varies by manufacturer and model. These delicate ribbons are essential for the operation of components such as the display, digitizer (touchscreen), battery, charging port, cameras (front and rear), speakers, microphones, volume buttons, power button, and various sensors. Repairing a broken screen latch mechanism requires a careful assessment of the damage and a selection of appropriate tools and materials. Use a flashlight and a magnifying glass to thoroughly inspect the inside of the headphone jack. Internal Component Interaction: Other active components within the phone can interact with the charging current to generate noise if shielding is compromised. Always disconnect the battery first to prevent any short circuits during inspection. If the S Pen detection and charging are working, power down the device. It measures the current (amperage) and voltage flowing into the device. Attempting to clean severe corrosion yourself can often spread it or cause further damage. Procedure: Carefully disconnect the FPC cable from its receptacle (if it's a plug-in type) or open the ZIF (Zero Insertion Force) latch (if it's a flip-up type). Replacing the internal plastic frame involves a full device disassembly. Distinguishing this from a completely dead phone or a boot loop is crucial for effective troubleshooting. Download Stock Firmware: Obtain the full stock firmware package for your exact device model.

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