[SOLVED] I'm looking for ROKIT F-ONE repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my ROKIT F-ONE. 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.

@Kelly

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 ROKIT F-ONE 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/752905/Change+screen+samsung+A6+
Take a look at comment #529
Also, this : https://xdaforums.com/t/q-softkey-backlight-and-2-2.1064400/.
You can also check this video starting from minute 9:

The ROKIT F-ONE 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 ROKIT F-ONE 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 ROKIT F-ONE 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 ROKIT F-ONE 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/vrall4-rolling-out-now-apparently.2106082/

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

If any internal components (like the earpiece, front camera, or home button assembly) are still attached to the broken screen or obstruct the frame edges, carefully transfer them to the new screen or temporarily remove them from the frame if they impede glass removal. The process of display refurbishment is intricate, requiring specialized equipment and a clean, controlled environment to achieve professional results. Network Registration: It manages the phone's connection to the cellular network, including searching for available networks, authenticating with the SIM card, and registering the device. Google's official Android SDK Platform-Tools or universal ADB drivers are good starting points. This poses a significant danger to waste collection workers, recycling facilities, and landfills, where such incidents are becoming increasingly common. Limited Range: Wi-Fi signal weakens rapidly with distance from the access point. Known-Good Replacement Screen: For testing if the issue is indeed the screen assembly. Analyzing these malfunctions involves systematically ruling out common software issues before delving into more complex hardware diagnostics. Interpretation: If the device's function is temporarily restored, it strongly indicates that the IC or its solder balls were the source of the problem. You can use specialized repair clamps, or carefully place heavy books evenly across the phone for several hours (4-6 hours is often recommended for the adhesive to fully cure). Testing: Use a multimeter's diode test mode; should show a voltage drop in one direction and open in the other. Consult schematic diagrams or boardview software for your specific phone model to precisely locate the antenna element, its connection points (e.g., coaxial cable connector, spring contacts), and the corresponding pads/components on the logic board that lead to the RF transceiver IC. Flex Cables: These delicate ribbon cables connect the digitizer and display panel to the smartphone’s main logic board, transmitting data and power. Be extremely cautious, as there may be flex cables (like fingerprint sensors or wireless charging coils themselves) connected to the back cover that can tear if pulled too hard. iTunes/Finder will extract the software, prepare the iPhone for restore, and then begin installing the firmware. Without this knowledge, many complex "dead phone" or functional issues remain unsolvable. If the speaker connects via a flex cable (common for earpiece speakers), ensure the connector is fully and securely plugged into its receptacle on the logic board. Check for Physical Damage: If you suspect the internal pins are bent or broken, it's a more serious issue. Flex Cables: Be extremely gentle when disconnecting and reconnecting flex cables; they are fragile and easily torn. Secondly, some repairs, such as motherboard replacements, inherently involve transferring your data storage component, which might fail or be incompatible, or replacing the entire data storage unit. They enable technicians to intelligently approach complex hardware failures, saving time, reducing unnecessary disassembly, and ultimately increasing the efficiency and success rate of repairs. ESD Protection: Always work on an anti-static mat with a wrist strap to prevent electrostatic discharge damage to sensitive components. The severity can vary, from barely perceptible shadows to distinctly visible outlines that interfere with normal viewing. Ring lights (LEDs surrounding the objective) provide even, shadow-free illumination. Throttling Performance: The CPU might slow down significantly to reduce heat generation. While seemingly insignificant, these clips play a critical role in preventing cables from coming loose due to drops, vibrations, or general handling, ensuring stable and reliable functionality. Patience is key, especially with delicate flex cables and tiny screws. Immersion: Place the motherboard into the cleaning basket or suspend it using a plastic clamp or non-metallic string, ensuring it is fully immersed in the solution and not touching the bottom of the tank directly (which can dampen cavitation). Damage: Look for any visible physical damage, such as tears in the speaker cone, corrosion on the contact points, or cracks in the module housing. (e.g., iPhone 7 "Audio IC Disease" was a common issue requiring this).

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