[SOLVED] I'm looking for Samsung Galaxy Ace Advance repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Samsung Galaxy Ace Advance. 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.

@Kristy

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 Samsung Galaxy Ace Advance 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/smartthings-app.3948825/
Take a look at comment #681
Also, this : https://xdaforums.com/t/now-do-we-really-have-two-screens-or-just-a-notch.3790925/.
You can also check this video starting from minute 2:

The Samsung Galaxy Ace Advance 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 Samsung Galaxy Ace Advance 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 Samsung Galaxy Ace Advance 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 Samsung Galaxy Ace Advance 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/Wiki/Canon_EOS_Digital_Rebel_XTi_Troubleshooting

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

Excessive Power Consumption: A component in that area is drawing more current than it should. Battery Safety: Do not puncture or damage the battery during disassembly. The exact order of steps varies significantly between phone models, so ALWAYS consult a specific repair guide or teardown video for your exact phone model (e.g., from iFixit, YouTube, or other reputable sources) before you begin. Intermittent Charging: The phone starts and stops charging randomly, often accompanied by repeated connection/disconnection sounds or notifications. Brush and Scrub: Use a soft-bristle brush saturated with 99% isopropyl alcohol to gently scrub all affected areas, especially connectors and areas with visible corrosion. Inspect Motherboard Connector: Look at the connector on the motherboard where the display flex cable attaches. Visually inspect the connection from all angles to confirm that the flex cable is sitting flush against the logic board connector and that there are no gaps on any side. Fine-tipped Tweezers: For handling tiny screws, flex cables, and the grille itself. If external cleaning and software troubleshooting do not resolve the issue, it points towards internal hardware damage requiring disassembly. This often resolves temporary software glitches affecting sensor readings. It requires patience, meticulous attention to detail, and a steady hand. Some strong solvents can also damage plastic frames or painted finishes. When a microSD card slot becomes damaged, whether due to physical trauma from repeatedly inserting or removing cards, bent or broken pins from incorrect card insertion, or corrosion from liquid exposure, it can render this valuable expansion capability useless. Listen for creaking sounds or feel for excessive flexing, which could indicate compromised adhesive bonds or a distorted frame. Pentalobe Screwdriver (P2/0.8mm): For the two screws at the bottom of the iPhone. The sensor is usually situated near the top or side edge of the phone’s frame, corresponding to where the flip cover magnet aligns. Slowly and steadily, pull or guide the wire across the entire display, cutting through the softened OCA. UFS: This is the successor to EMMC, found in modern high-end and some mid-range smartphones. A severely degraded battery might struggle to provide peak current during boot. They are often found protecting LCD backlight circuits, charging ports (VBUS lines), or various power rails. Damage to this housing, such as severe bends, cracks, or deep scratches, can affect the phone's structural integrity, prevent proper screen seating, or even cause internal components to misalign, leading to further issues. Discoloration here typically points to issues with the OLED panel itself or its power delivery. No-clean flux: Designed to leave minimal, non-corrosive, non-conductive residue that supposedly doesn't need cleaning. For stubborn lint, a plastic toothpick can be used with extreme caution. Apply a tiny drop of 90%+ IPA directly to the rusted screw head and let it sit for a few minutes. Most phones require heating the edges of the screen or back cover to soften adhesive, then using suction cups and plastic pry tools to carefully separate the display assembly or back panel from the frame. In other cases, the touch may be partially unresponsive, meaning certain areas of the screen work while others do not. There could be other unrelated RF issues (e.g., damaged antenna flex, faulty baseband processor). Old Thermal Paste: If the old thermal paste on the processor (often underneath a metal shield or heat spreader) appears dry, cracked, or insufficient, it's highly recommended to clean it off and reapply new thermal paste. Battery Issues: A severely degraded battery might not supply stable power, but this usually manifests as sudden shutdowns rather than mode loops.

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