[SOLVED] I'm looking for Huawei Honor 5A repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Huawei Honor 5A. 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.

@Marisa

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 Honor 5A 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/curtana-xiaomi-eu-12-0-2-dialler-apps-keep-giving-me-this-error-when-making-receiving-calls.4200881/
Take a look at comment #1409
Also, this : https://www.ifixit.com/Guide/PlayStation+VR+Headset+Lenses+Replacement/86250.
You can also check this video starting from minute 10:

The Huawei Honor 5A 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 Honor 5A 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 Honor 5A 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 Honor 5A 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/at-t-4g-icon-on-d620.2857267/

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

Encountering a broken screw during a smartphone repair is a frustrating, yet not uncommon, problem. Too much can blow away small components; too little can prolong heating time. Gently pry it out using a plastic spudger, being extremely careful not to puncture or bend the battery. High-Quality Liquid Flux: No-clean, low-residue, specifically for fine-pitch rework on flex cables. Preventive Maintenance: By monitoring trends (e.g., battery degradation rate, storage wear), users can anticipate component failure and take proactive steps. For affected older devices, the only "fix" was to replace the home button with the original one paired to the device, or obtain a board-level repair that could marry a new home button to the secure enclave (extremely complex and requires specialized tools). Magnifying Glass / Jeweler's Loupe: For inspecting flex cables and switches. Stereo Microscope: Indispensable for magnifying the tiny components and ensuring precision. It demands meticulous attention to detail, a steady hand, and familiarity with smartphone internals. In conclusion, repairing a smartphone's main power switch circuit can range from a simple cleaning to an intricate microsoldering job. Controlled Rotation: Slowly and steadily rotate your phone around each of its three axes (imagine pitching it forward/backward, rolling it side-to-side, and yawing it left/right). It contributes to accurate altitude readings in mapping and fitness applications, enables precise "floor climbed" counts, assists weather apps with local pressure data, and even enhances GPS accuracy, particularly in areas with varying elevations. Given the risks, backing up your secure folder data BEFORE any significant repair is paramount. By implementing one or a combination of these screw organization methods, you significantly increase your chances of a successful, damage-free smartphone repair. Connect it temporarily (without fully installing) and power on the phone (reconnecting the battery, then powering on). While the camera module itself might be perfectly functional, the protective glass covering it is susceptible to damage from drops, impacts, or abrasive surfaces. This method carries a slight risk of causing further screen damage if too much pressure is applied. Heat Transfer: The metal shield acts as a heatsink, rapidly dissipating heat. Gather Tools: You'll need specialized tools: prying tools, suction cup, small screwdrivers, heat gun/hair dryer (to loosen adhesive), spudgers. Kapton tape: Heat-resistant tape for masking off surrounding components. This guide will cover when a logic board replacement is necessary, the considerations involved, and a step-by-step process for the replacement. Disconnect Battery: Once the device is open, immediately disconnect the battery's flex cable. When this button becomes unresponsive, intermittent, or sticky, it can severely hamper the usability of the smartphone, sometimes rendering it almost unusable. Connect its cord to the ESD mat's grounding point or directly to a grounded wall outlet. Flex Cable Traces: Use a multimeter in continuity mode to check the traces on flex cables that carry audio signals from the audio IC to the speaker/mic contacts. Once removed, set the old battery aside, keeping it away from conductive surfaces. Microscope (Recommended): If dealing with motherboard-level thermistors. A swollen battery is a clear indicator of failure and a safety hazard. Accessibility Features: Settings designed to help users with visual impairments (e.g., color inversion, color correction, grayscale mode) can drastically alter the display. Carefully wipe the camera lens with a lint-free wipe dampened with a tiny amount of IPA.

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