[SOLVED] I'm looking for Huawei Enjoy 20 SE repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Huawei Enjoy 20 SE. 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.

@Leila

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 Huawei Enjoy 20 SE 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/s10-does-not-accept-password-or-restart-or-go-into-recovery-mode.4242171/
Take a look at comment #538
Also, this : https://www.ifixit.com/Answers/View/826001/Thay+pin+%C4%91i%E1%BB%87n+tho%E1%BA%A1i+samsung+-+Replace+Samsung+phone+battery.
You can also check this video starting from minute 9:

The Huawei Enjoy 20 SE 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 Huawei Enjoy 20 SE 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 Huawei Enjoy 20 SE 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 Huawei Enjoy 20 SE 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/mod-youtube-4-4-11-v5b-1080p-720p-hd-over-wifi-3g-screen-off-playback.1529715/

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

Dust and debris can easily enter the device, potentially accumulating under the screen and causing visible blemishes, or even interfering with internal components. Apply a thin, even layer of hydrogen peroxide cream/gel to the yellowed plastic surface. Use Tweezers for Stubborn Shards: For smaller, stubborn glass fragments embedded in the frame or stuck in corners: Identify Suspect Coils: Based on the symptoms and schematics (if available), identify coils in the affected power rail. Board Warping: Usually a result of uneven heating or not using a preheater. Place the bare frame on a perfectly flat surface (e.g., a glass table, a known-flat metal plate). Once all pins are visibly soldered, gently tap the component with tweezers to ensure it's firmly seated. This could manifest as colors appearing too warm (yellowish), too cool (bluish), oversaturated, desaturated, or simply inaccurate compared to how they should look. As the solder melts, surface tension will usually pull the connector into perfect alignment (self-centering). It's essentially interference or electrical noise that has crept into the audio path. Excessive Drain: Losing more than 3-5% per hour in standby, or significantly more overnight (e.g., 20-30% loss in 8 hours), indicates an issue. Clean the Area: Use IPA and a lint-free cloth/cotton swab to clean any old adhesive residue or debris from the area. "Charger Connected" but not charging: The phone registers a charger but the battery percentage doesn't increase. In the world of modern smartphone repair, simply replacing a broken screen with a new one is often not enough to restore full functionality. The thermal paste acts as an interface material between the hot SoC and this cooling mechanism. Reaching: The angle can help reach components that are slightly obstructed. Lifted pads: Where a component pad has detached from the flex cable, often due to excessive force or heat. Compare to Known-Good Device: If possible, compare the sensor readings to a similar, working phone to establish a baseline. A cracked, bent, or severely damaged mid-frame can compromise the phone's structural integrity, affect the alignment of other components, and even lead to further damage if not addressed. NFC Controller Chip: A small integrated circuit on the motherboard that manages the NFC communication protocols. Cloud Backup: For Android, ensure your Google account is set up to back up to Google Drive (Contacts, Calendar, Wi-Fi passwords, call history, device settings, app data). If data transfer fails, is very slow, or frequently disconnects, the data lines within the cable are likely damaged. Check the connectors on both ends of the flex cable for bent pins or debris. Understanding the intricacies of USB-C port repair is therefore crucial for maintaining the functionality of contemporary devices. In conclusion, the proper reinstallation of a smartphone motherboard is a synthesis of patience, precision, and systematic checks. Color distortion, where hues appear incorrect, washed out, or even inverted, can also be a strong indicator. A damaged SIM card tray can render your phone unable to detect a SIM card, prevent you from inserting or removing the SIM, or even damage the delicate SIM card reader pins inside the phone. When a smartphone board has been subjected to liquid, even after meticulous cleaning and component replacement, residual vulnerabilities can remain. Clearance and Interference: After inspecting individual cables, take a step back and look at the overall internal layout. In conclusion, integrating a thermal camera into your smartphone repair toolkit represents a significant upgrade in diagnostic capability.

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