[SOLVED] I'm looking for EAGET FAMILY N7 7 repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my EAGET FAMILY N7 7. 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.

@Alfred

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 EAGET FAMILY N7 7 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/206699/2006+Chrysler+Town+and+Country+van+has+check+tire+light+on
Take a look at comment #1151
Also, this : https://xdaforums.com/t/q-need-a-new-calendar-app.1061640/.
You can also check this video starting from minute 7:

The EAGET FAMILY N7 7 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 EAGET FAMILY N7 7 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 EAGET FAMILY N7 7 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 EAGET FAMILY N7 7 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/delete.4042049/

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

Always prioritize caution and precision over force to protect your valuable device.## 5. High-Magnification Microscope: Essential for inspecting and working on these tiny components. Isopropyl alcohol helps dissolve remaining adhesive residue and also catches any fine dust or glass particles that might still be clinging to the surface. Locked Phone: If your phone is locked to a different carrier, a SIM card from another provider will not provision. Ensure it's flat, aligned correctly, and doesn't obstruct any moving parts or electrical contacts. They show you where each rail originates, which components it powers, and where to find test points (often easily identifiable capacitors) to measure these voltages. A rogue application stuck in a loop or constantly syncing in the background can significantly drain the battery. However, without root, they typically operate as an overlay, meaning they don't fundamentally change the system's display profile and might not be effective for a deep-seated issue. Then, gently clean the contact points with isopropyl alcohol (90%+) and a lint-free cotton swab or soft brush. Avoid prying or twisting, as this can lift pads if some solder is still solid. While modern phones increasingly use OLED displays that are self-emissive, many still utilize LCD panels that require a separate backlight to illuminate the pixels. The Qi wireless charging standard (pronounced "chee") uses inductive power transfer. EMMC: This is a type of non-volatile flash storage commonly used in older and mid-range smartphones. It might be lightly adhered to the frame or simply slotted into place. Display Brightness Test: While in a quiet room, adjust the screen brightness from minimum to maximum and back again. Close the Device: Reapply adhesive if necessary and carefully close the device's back cover or screen assembly. Use isopropyl alcohol and a lint-free cloth to clean any suspicious connectors. Note how it was seated and if there were any specific alignment pins or adhesive points. Performance Degradation: A general slowdown of the device, characterized by noticeable lag, stuttering animations, and slow app switching, can be indicative of RAM issues. If the pre-adhesion test passes, disconnect the battery, fully assemble the phone, and then power it on. Reseat: Carefully and firmly reconnect the display flex cable(s) until they snap securely into place. Set the multimeter to `V DC` (often a `V` with a straight line above it, or `DCV`). However, if the issue persists or the port is visibly damaged, professional repair or replacement of the charging port assembly is usually necessary. Tests to Run: Focus on "Sequential Read" and "Sequential Write" (important for large file transfers like videos) and "Random Read" and "Random Write" (critical for app loading, database access, and overall UI responsiveness). If the connector itself is damaged (e.g., bent pins on the motherboard or a broken socket on the flex cable), it may require replacement of the flex cable or a micro-soldering repair on the motherboard. The device is placed in a sealed chamber, and a slight vacuum or pressure is applied while monitoring for a change in pressure, indicating a leak. If the pad tears off completely, it often takes a small portion of the trace with it, leaving bare fiberglass. Clean the residual solder from the pads on the motherboard using solder wick/braid and a soldering iron. Face unlock systems vary in sophistication, from basic 2D recognition using the front-facing camera to more advanced 3D systems that employ infrared (IR) dot projectors, IR cameras, and flood illuminators (like Apple's Face ID or Google's Pixel Face Unlock). When this plastic cover becomes damaged, it not only detracts from the phone's appearance but can also potentially, albeit subtly, impact signal strength.

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