[SOLVED] I'm looking for Alcatel A30 Plus LTE repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Alcatel A30 Plus LTE. 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.

@Zuzana

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 Alcatel A30 Plus LTE 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/q-save-battery-stats.3084497/
Take a look at comment #869
Also, this : https://www.ifixit.com/Answers/View/691987/All+of+the+buttons+in+FitBit+Versa+2+are+unresponsive..
You can also check this video starting from minute 8:

The Alcatel A30 Plus LTE 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 Alcatel A30 Plus LTE 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 Alcatel A30 Plus LTE 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 Alcatel A30 Plus LTE 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/cm10-m3-build-soon-for-xperia-2011-phones.1982479/

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

You'll need a Windows PC, correct USB drivers for your phone (ADB and Fastboot drivers are a good starting point), and the appropriate flashing tools. If the board is heavily corroded, declare it beyond economical repair or too risky to attempt without extensive (and expensive) board-level work. Disconnect all flex cables leading to the motherboard (display, charging port, antenna, camera, etc.) using a plastic spudger. Never use metal objects (like paper clips) as they can short the pins or cause further damage. This is an advanced micro-soldering job requiring a hot air station, microscope, and fine soldering tools. Reboot System: After the wipe is complete, select "Reboot system now." If using liquid adhesive (like B7000), apply a thin, even bead around the frame's edge. The flex cable transmits the electrical signal to the system when the switch is pressed. It's important to distinguish water damage from other common screen problems: Replacing an ISP, which is almost always a Ball Grid Array (BGA) package, demands a specific and expensive toolkit: If the issue started immediately after an update, consider reporting it or looking for community reports of similar issues. Recognizing the underlying causes and potential consequences of warping is essential, particularly the critical safety concern posed by a swollen battery. Gently sand the ding or scratch, moving in the direction of the frame's grain (if applicable) or in small circular motions. Wear and Tear: Over time, the plastic can become scratched, scuffed, or discolored from daily use. Delayed Responsiveness after Boot: Even after the home screen appears, the phone remains sluggish, apps take a long time to launch, or the UI lags significantly for several minutes. Install a simple drawing app (e.g., "Simple Draw," "Autodesk Sketchbook"). Camera Lens Protectors: Consider applying a dedicated tempered glass or film protector specifically for the camera lens. Unlike LCDs, which use a constant backlight and modulate light through liquid crystals, each pixel in an OLED display emits its own light. Physical Damage: Dents or cracks can compromise shield integrity or damage components. A good set of precision screwdrivers, typically including Pentalobe, Phillips, and sometimes Tri-point bits, will be necessary to open various smartphone models. Restoring the original water resistance sealing gasket is therefore a critical step in many smartphone repairs, aiming to bring the device's resilience back as close as possible to its original state, even if achieving true factory-level water resistance is a nearly impossible feat for most repair shops. If the power supply immediately shuts down (goes into constant current mode) and you don't detect a hot spot: This indicates an extremely low resistance short (almost direct short) drawing a lot of current very quickly. For example, the shade of black on a screen bezel or the texture of a battery wrapper. Other lead-free solder alloys have been explored or are used for specific niche applications in smartphones: Reinstall Speaker Assembly: Place the speaker module or earpiece speaker back into its position and secure it with its screws. For maximum security and to include sensitive data like Health and Keychain, tick "Encrypt local backup" and set a strong password (remember this password!). This is more advanced and requires a schematic, but can help identify a broken trace. This physically blocks sound waves, leading to muffled or quiet audio. Heat the edges of the screen with a heat gun/hair dryer to soften adhesive. Logic Board Component: In rare cases, a component on the logic board that powers or processes data from the sensor might be damaged.

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