[SOLVED] I'm looking for MIRAY TPM 105 repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my MIRAY TPM 105. 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.

@Filippo

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 MIRAY TPM 105 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/541702/Unable+to+Eject+SIM+Tray
Take a look at comment #1553
Also, this : https://www.ifixit.com/Answers/View/684533/Acer+Aspire+515-51-86Aq+hinge+broken+and+screen+splitting.
You can also check this video starting from minute 7:

The MIRAY TPM 105 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 MIRAY TPM 105 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 MIRAY TPM 105 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 MIRAY TPM 105 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/Samsung+Galaxy+S24+Ultra+Earpiece+Speaker+Replacement/175776

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

The key is to correctly identify the type of shield attachment and exercise extreme caution, especially when dealing with soldered shields and the delicate components they protect. This combination can vary slightly by device, but commonly involves the Power and Volume buttons. Use your phone normally for a period, observing for any recurrence of ghost touch. Screw Management: Keep screws meticulously organized to ensure they return to their correct places; misplacing screws can cause internal damage. It transforms a chaotic chore into a methodical, professional craft.## 5. Relevance: RMA flux is very popular for general micro-soldering, including FPC connector repair, component replacement, and some BGA work. Data Backup: Always advise customers to back up their data before any repair, especially if flashing software is a possibility. Troubleshooting Errors Related to the Smartphone Digital Crown or Side Key This includes capturing the overall layout, specific areas of concern, and microscopic details of any damage present. Screen Randomly Goes Dark/Bright: Erratic brightness adjustments without a change in ambient light. It's important to distinguish true, permanent burn-in from image retention (ghosting). This security measure means that simply swapping a faulty sensor with a new, generic one will often result in a "fingerprint sensor not recognized" error or a complete loss of functionality. This significantly reduces the total heat required from the hot air station, minimizes thermal shock, prevents board warping, and makes component removal safer and faster. Heat for Short Bursts: Heat for 10-30 seconds at a time, then test the adhesive. Restart Device: A full reboot of your smartphone can resolve temporary operating system bugs that might be interfering with the sensor's functionality. Flex Cable Integrity: If the sensor is part of a flex cable, ensure the cable is not kinked, torn, or damaged, and its connector to the logic board is securely seated. With the speaker module removed and isolated, set your multimeter to resistance mode (Ohms). Camera: While not a "motion sensor," physical misalignment of the camera module can lead to blurry photos, vignetting, or an off-center view. Sometimes, a modem might struggle to switch between network types, and manually setting it can help diagnose. If the expected voltage is missing or incorrect, the module won't power up, preventing communication. A healthy speaker should show a low resistance reading, typically between 4 to 32 ohms, depending on the speaker type. Many perceived hardware issues are, in fact, software glitches or easily rectifiable external problems. Apply heat evenly over the component, moving the nozzle in gentle circles. Assessing charging cable wear is vital for diagnosing charging issues and preventing potential damage to the smartphone's charging port or even safety hazards. Then, press and hold "Power off" (or tap and hold the Power off icon) until a prompt for Safe Mode appears. A simple reboot can resolve temporary software hiccups that might be misreporting battery data. The process of separating the glass from the digitizer/LCD without damaging the underlying layers is incredibly delicate. It requires downloading the correct firmware package, specific tools, and following precise instructions. This can sometimes reveal app-specific issues rather than hardware ones. Analyzing GPS antenna faults requires a multi-pronged approach, encompassing software checks, environmental testing, and detailed physical inspection of the internal antenna module and its connections.

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