[SOLVED] I'm looking for Lava Iris 352 Flair repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Lava Iris 352 Flair. 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.

@Harry

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 Iris 352 Flair 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/faster-file-transfer-using-bluetooth.477723/
Take a look at comment #104
Also, this : https://www.ifixit.com/Wiki/Troubleshhoting_logic_board_components.
You can also check this video starting from minute 9:

The Lava Iris 352 Flair 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 Iris 352 Flair 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 Iris 352 Flair 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 Iris 352 Flair 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-samsung-shv-e110s.1511147/

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

Rear Panel Removal: Also often requires heating the edges and careful prying. RF Signal Generator, Spectrum Analyzer, Oscilloscope (for advanced RF diagnostics , professional labs only) Attempt a Force Restart: Different phone manufacturers have specific button combinations for a hard reset (e.g., Volume Down + Power for 10-15 seconds, or Volume Up + Power). Perform thorough testing in different scenarios: calls, messages, notifications, and haptic feedback for screen touches (if applicable). Note how it was seated and if there were any specific alignment pins or adhesive points. Liability Protection: Provides concrete evidence in case of customer disputes about pre-existing damage, repair quality, or lost devices. It involves desoldering the old BGA (Ball Grid Array) chip and carefully soldering a new one onto the logic board. You can toggle off cellular data for apps you don't want using it in the background. Plug your phone into a known-good wall charger using a known-good USB cable for at least 30 minutes, or even an hour. Most modern smartphones either open from the front (screen removal, typical for iPhones) or from the back (back cover removal, common for many Android devices). PMIC Replacement: If the PMIC is determined to be the culprit (after ruling out all other possibilities and confirming internal failure or short), it requires specialized BGA rework equipment (hot air station, preheater, stencil, flux, solder paste) and advanced soldering skills for replacement. High-quality Tweezers: Extremely fine-tip for handling tiny components. Inspect the physical power button actuator for damage or obstructions. A diagnostic app to monitor internal temperatures can also be beneficial in the initial stages. Isopropyl Alcohol (IPA) and Cotton Swabs/Lint-Free Wipes: For cleaning. Always proceed with extreme caution and consider the cost-benefit of a DIY repair versus professional service. Go to `Settings > Battery > Battery usage` (or similar) to see which apps are consuming the most power. If pins are clearly broken or corroded, the port itself needs replacement. If overheating symptoms disappear in Safe Mode, a third-party app is likely causing the issue. Unlock Command Fails: Double-check the exact command for your device model. Known Good Display Assembly: If visual inspection is inconclusive or you want to confirm the issue is with the display/connector area, swap the existing display with a known good, working display assembly (which includes its own flex cable and connector). By meticulously following the steps, using the right tools, and exercising patience, technicians can successfully restore full functionality to a customer's smartphone.## 9. Test Before Final Seal: This preliminary test step can save significant time and effort if the repair isn't successful the first time. Replacing the button flex cable is a common repair that can restore full functionality to these critical controls. Unlike the easy-pull adhesive strips found in some modern devices, many older or less premium models use incredibly strong, rigid adhesive that makes battery extraction a nerve-wracking ordeal. Battery Swelling: This is the most critical internal check if bulging is suspected. Static electricity can easily damage sensitive communication ICs and render your diagnostic efforts futile. Even if not actively using the phone, numerous background apps or processes (e.g., large downloads, constant syncing, malware) can keep the CPU active, generating heat that exacerbates charging temperatures. Capture images at various magnifications, starting with a wider view to provide context, then zooming in to highlight the specific defect. Overheating: While not a direct cause of "authentication failure," prolonged overheating can stress components, including the Wi-Fi module, potentially leading to intermittent failures or reduced performance.

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