[SOLVED] I'm looking for TOREX FS2 New repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my TOREX FS2 New. 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.

@Alessia

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 TOREX FS2 New 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-reinstall-google-talk.1209166/
Take a look at comment #1131
Also, this : https://www.ifixit.com/Answers/View/623921/MacBook+Pro+A1398+trackpad+not+working.
You can also check this video starting from minute 7:

The TOREX FS2 New 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 TOREX FS2 New 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 TOREX FS2 New 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 TOREX FS2 New 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/38598/HP+P1005+LaserJet+printing+with+streaks+on+paper,+Cleaning

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

Avoid pure black or pure white backgrounds initially, as these can sometimes mask subtle ghosting. Genuine: Sharp, vibrant, accurate color reproduction, good low-light performance. Gently nudge the component with tweezers if needed to aid settling, then release. This can often be done through a diagnostic app or by observing altitude readings in mapping software. Secure the power button flex cable onto your work mat using Kapton tape or a small PCB holder. Lower frequency bands (e.g., LTE Band 12/13/17/71 in North America, Band 20 in Europe) offer greater range and better building penetration, crucial for indoor and rural coverage. Root Access: Granting the user superuser permissions for deep system control. Identifying smartphone screen burn-in involves critical visual inspection against solid color backgrounds, focusing on areas prone to static image display. It might be labeled with markings like "RF," "WTR," "MDM," or brand names like Qualcomm (WTR series), Intel, or Samsung. NVRAM stores critical device-specific information, including radio calibration data and network configurations, alongside the IMEI. Display Testing Apps/Built-in Diagnostic Modes: Specifically designed applications or hidden developer/service menus that visualize touch input. Damaged internal components: Rarely, a failing internal component (e.g., storage chip, memory) can prevent the OS from loading properly. Phone Doesn't Turn On: A dead PMIC means no power reaches the components needed for boot. They manifest as apps unexpectedly closing, freezing, or displaying an error message before disappearing. Double-check that all screws are tightened appropriately, but do not overtighten. General Purpose: Excellent for everyday soldering tasks, offering good heat transfer. Remove Shields and Screws: Many internal connectors and components are protected by small metal shields secured with tiny screws. Faulty Microphone Component: The microphone itself can simply fail internally due to manufacturing defect or age, producing static, low volume, or no sound. Dull/Washed-Out Colors: While not directly a "cast," poor color balance can make colors appear less vibrant or saturated than they should be. Repairing a damaged Charging IC is a high-level repair that can save a phone from being declared irreparable. Reinstall Securing Components: Replace any metal brackets and screws that were removed earlier to secure the assembly. Regardless of the symptom, always start with these basic, non-invasive steps: Disassemble iPhone: Carefully open the iPhone, disconnect the battery, and remove the logic board from the frame. Positioning: Using fine tweezers, carefully position the new switch onto the pads. While some advanced logic board failures are beyond the scope of DIY repair, many common issues can be resolved with careful diagnostics and a few component replacements. It's primarily used for flashing custom recoveries, rooting devices, updating firmware, or unlocking the bootloader. Look for signs of "pad lift" where the solder pad has detached from the PCB. In conclusion, detecting smartphone camera lens haze involves a methodical process of careful visual examination and practical photography tests under varying conditions. Material Choice: The improvised damping material should be soft enough to absorb vibrations but dense enough to provide support. When a phone is in Fastboot, it typically displays a text-based interface on the screen, often showing "FASTBOOT mode," "Download mode," or similar messages, along with information about the bootloader, device state, and security settings.

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