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

Hi,

I'm hoping you can help me out with my LAVA Blaze Amoled. 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.

@Dario

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 LAVA Blaze Amoled 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-link2sd-issue-after-reboot.2132401/
Take a look at comment #1361
Also, this : https://xdaforums.com/t/international-gt-i9505-in-usa-which-frequencies.2383793/.
You can also check this video starting from minute 6:

The LAVA Blaze Amoled 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 LAVA Blaze Amoled 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 LAVA Blaze Amoled 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 LAVA Blaze Amoled 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/Toshiba+Satellite+L755-S5244+Keyboard+Replacement/123421

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

DO NOT use canned air, as it can spray propellant, condense moisture, or be too powerful. Oxidation, a chemical reaction often involving oxygen and other substances like moisture, can form a corrosive layer on the delicate metal pins within the USB port, impeding electrical conductivity. Check Volume Settings and Mute Switches: Ensure all volume levels (media, call, ringtone) are turned up and the phone isn't muted or on "Do Not Disturb." Some iPhones have a physical mute switch. Excessive "Mobile network standby" or "Wi-Fi" usage: This could indicate poor signal strength forcing the phone to work harder to maintain a connection, or issues with network scanning. Jumper Wire (Enameled Copper): Extremely thin, insulated copper wire (e.g., 0.01mm or 0.02mm) for repairing torn traces. This will erase all saved Wi-Fi networks, Bluetooth pairings, and VPN configurations, effectively returning your network settings to factory defaults. Be extremely careful when lifting, as excessive force can damage the adhesive. Dirty/Damaged Lens: Smudges, dust, fingerprints, scratches, or even internal haze (condensation, fungus) on the lens can scatter light and introduce color shifts. Move your phone from a dark environment to a brightly lit one, and vice versa. Hydrophobic Coatings: Repel water, aiding in water resistance and preventing water droplets from sticking and distorting images. Wait at least 15-30 minutes: Sometimes, a deeply discharged battery needs a significant amount of time to accumulate enough charge to show any signs of life (like a charging indicator or battery icon). Hardware Failure: Faulty Wi-Fi module or cellular modem (less common). Manufacturing Defects: Rare, but traces can sometimes be poorly etched or have weak points from the factory. Outcome: If successful, the phone should boot normally after the reset. Cycling Current (Boot Loops): The current rises to a certain point, then drops back to 0mA or the initial spike, and repeats. Antivirus/Firewall Interference: Temporarily disable your antivirus or firewall as they can sometimes interfere with flashing tools. Flex Cable: A thin, flexible circuit board that connects the button mechanism to the main logic board. Intermittent Detection: Often points to a cold solder joint, a partial short, or a bent pin within the reader. Tweezers and Fine Probes: For accurately probing tiny test points on the PCB. Moisture ingress can corrode the pins and internal circuitry of the touch IC, leading to shorts, open circuits, or complete failure. Avoid Physical Impact: Use protective cases and handle the phone carefully. Set Multimeter: Set your DMM to the lowest resistance range (e.g., 200 Ohms). The general troubleshooting methodology for software locks and activation errors post-repair should be systematic: Restart the Phone: A simple reboot can sometimes resolve temporary network glitches. Crucial: Reconnect the battery flex cable LAST before closing the phone. DC Power Supply Analysis: For experienced technicians, connecting the phone to a DC power supply can provide valuable insight. Don't Overcharge: While modern phones have protection, avoid leaving your phone plugged in for extended periods after it's fully charged. Android (Fastboot Mode): On many Android phones, you can boot into Fastboot mode (often by holding power + volume down). Factory Reset (data loss): As a last resort for software issues, a factory reset (after backing up data) can eliminate all software corruption. Diagnosing smartphone battery drain can be a detective process, often requiring patience and a methodical approach.

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