[SOLVED] I'm looking for Wiko View 4 Lite repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Wiko View 4 Lite. 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.

@Andrei

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 Wiko View 4 Lite 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/482532/My+laptop+boot+problem
Take a look at comment #82
Also, this : https://www.ifixit.com/Guide/Toshiba+Satellite+L305-S5946+Keyboard+Replacement/14190.
You can also check this video starting from minute 8:

The Wiko View 4 Lite 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 Wiko View 4 Lite 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 Wiko View 4 Lite 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 Wiko View 4 Lite 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/Answers/View/143302/Why+won't+my+external+mouse+work

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

Data recovery usually requires fixing the underlying hardware issue to get the phone to power on, even briefly. Before delving into complex hardware diagnostics, start with the basics. Burn Marks: Small, dark spots on the contacts or surrounding plastic can indicate arcing or short circuits, often due to liquid damage or a faulty component. For the Repair Shop: Repair businesses caught engaging in illegal IMEI manipulation face severe legal repercussions, including heavy fines, loss of business licenses, criminal charges for owners and employees, and significant damage to their reputation. It's compromised, and attempting to bend it will almost certainly cause complete failure. Heat Source (if adhesive is present): Heat gun or heating pad to soften adhesive for screen/back cover removal. Rattling Sounds: A loosely aligned camera module can vibrate and produce an annoying rattling sound, especially when the haptic engine activates. If the phone doesn't shut down randomly in Safe Mode, a third-party app is likely the culprit. Cool Down: Once you've achieved significant improvement, allow the phone to cool down naturally. This is the oldest trick in the book for a reason: a simple reboot can clear temporary bugs, free up RAM, and refresh all system processes, often resolving the "System UI isn't responding" error. Diagnosing involves visually inspecting the screen for light output and using a multimeter to test for voltage at the backlight connector on the motherboard or directly across the LED array, if accessible. Restart the Phone: A simple reboot can often clear temporary software conflicts. Apply UV curable solder mask over the soldered edges of the copper foil and any exposed parts of the foil that should not be making contact with other components. Take note of any initial cable connections that might be strained or become disconnected during this initial opening phase, as this is often the first sign of improper previous routing or a manufacturing defect. Component Pins and Solder Joints: Look closely at the pins of larger ICs (like the CPU, PMIC, Wi-Fi module) and the solder joints of smaller components (resistors, capacitors). GApps Compatibility: If flashing a custom ROM, ensure you use the correct GApps (Google Apps) package compatible with the Android version of the ROM and your device's architecture (e.g., ARM64). If the issue persists across multiple camera apps, it's highly indicative of hardware. Charging Port Replacement: May involve removing the lower half's components and possibly micro-soldering. Factory Reset: While often ineffective for this issue, a factory reset (from recovery mode) can sometimes resolve minor software glitches. By carefully understanding its components, diagnosing potential misalignments, and meticulously following the repair steps, technicians can restore the device's front-facing capabilities to their intended performance, ensuring clear selfies, reliable video calls, and accurate sensor operation.Diagnosing Issues with the Force Touch or 3D Touch Layer on a Smartphone Press and hold the Power button, then select "Power off" or "Shut down" from the options that appear on the screen. Check for continuity between the newly repaired pin and its intended connection point on the motherboard (e.g., the component it connects to). A faulty PA can manifest in several ways, primarily affecting the phone's ability to transmit data and voice. This advanced repair capability distinguishes professional technicians and enables the salvaging of devices that might otherwise be deemed irreparable. This can often resolve minor network registration issues and prompt your phone to find the strongest available cellular signal. Begin heating the IC evenly, moving the nozzle in circular motions to ensure consistent heat distribution. An anti-static wrist strap is highly recommended to prevent electrostatic discharge (ESD), which can cause irreparable damage to sensitive internal electronics. Software-Related: The physical buttons work, but the phone doesn't adjust volume as expected. If your new assembly has pre-applied adhesive, peel off the protective backing and press it gently into place. A worn-out cable with bent or corroded pins can cause intermittent connection.

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