[SOLVED] I'm looking for IRBIS TZ197 repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my IRBIS TZ197. 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.

@Frans

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 IRBIS TZ197 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-root-von-huawei-g750-u10.3027161/
Take a look at comment #584
Also, this : https://xdaforums.com/t/create-flashable-boot-animation-zip-file.2632764/.
You can also check this video starting from minute 3:

The IRBIS TZ197 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 IRBIS TZ197 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 IRBIS TZ197 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 IRBIS TZ197 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/jelly-bean-aosp.1786631/

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

Intermittent Power: The phone powers on erratically or refuses to stay on. Hold the phone at various angles relative to the light, allowing the light to reflect off the lens surface. USB Charging Controller IC: A dedicated chip that manages the communication between the charger and the battery. Away from Direct Sunlight: Prolonged exposure to direct sunlight can degrade plastic components, adhesives, and even affect some electronic materials over time. "Important Battery Message" (iOS): On iPhone XR, XS, and newer models running iOS 13.1 or later, navigating to Settings > Battery > Battery Health will display an "Important Battery Message" if the battery is deemed non-genuine or if its health cannot be verified. This often points to the master controller (SoC) or an issue with the clock generation circuit. Often, the secondary loudspeaker is located near the top of the phone, either under the earpiece speaker or as a separate module near the top edge. Memory Management Tweaks: Some custom kernels allow tweaks to low-memory killers or Z-RAM. Be cautious not to scratch or gouge the frame's metal or plastic with the tweezers. Software updates often include bug fixes and performance improvements. This immediately removes power from the logic board, preventing any accidental short circuits and protecting both you and the device from potential damage during the repair. Common types of flex cable damage include tears or nicks in the flex material, burnt traces (often due to short circuits or over-voltage), bent or broken connectors, and detached or damaged integrated components like microphones, LEDs, sensors, or even small ICs. If Bluetooth works, exit Safe Mode (restart your phone normally) and uninstall recently installed apps one by one until the issue is resolved. A shorted capacitor on a smartphone’s logic board is a common culprit behind a myriad of frustrating issues, ranging from complete power failure (no boot, no charge) to specific component malfunctions, rapid battery drain, or unexpected reboots. Force-Closing Apps: Constantly force-closing apps can sometimes be counterproductive on modern Android versions, as the system is designed to manage background processes efficiently. A skilled technician can perform the replacement with specialized tools and ensure all components are transferred correctly. Reballing/Replacement: The most reliable repair is to remove the old IC, reball it (apply new solder balls), and re-solder it, or replace it entirely with a new, programmed IC (some modules are paired to the motherboard and require specialized programming). Liquid Damage: Look for any signs of water ingress, corrosion, or residue on the logic board, especially around the baseband chip, PMIC, and RF transceiver. The faulty baseband chip is then carefully lifted from the motherboard using specialized vacuum tools or tweezers. At this point, it's advisable to seek assistance from a certified repair technician who has the tools and expertise to perform board-level diagnostics, inspect internal components, and replace faulty parts like the battery, PMIC, or even the motherboard itself. The goal is to find the "sweet spot" where charging is stable and continuous. When a smartphone camera malfunctions, it significantly degrades the device's utility and user experience. Carefully peel off the protective backing from the new camera glass (if it has pre-applied adhesive). If the problem is consistent across all these apps, it strongly suggests a system-wide barometer issue. Both EMMC and UFS chips are typically Ball Grid Array (BGA) packages, meaning they are soldered directly to the smartphone's motherboard with an array of solder balls. To effectively clean and maintain smartphone internals, a specific set of tools and materials is required. Open the Display: Once the adhesive is loosened around all edges, gently open the display. The front-facing camera is almost always located at the top of the phone, adjacent to the earpiece speaker, often sharing a flex cable assembly with the earpiece speaker, proximity sensor, and ambient light sensor. Force Close and Clear Cache: If a specific app (e.g., a weather or fitness app) is showing inaccurate data, force-close it and clear its cache and data via the phone's app settings. This step requires significant knowledge of schematics and safety precautions as you'll be probing a live board.

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