[SOLVED] I'm looking for Samsung R910 Galaxy Indulge repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Samsung R910 Galaxy Indulge. 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.

@Manuel

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 R910 Galaxy Indulge 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-is-there-any-way-to-stop-running-services-at-startup.1068486/
Take a look at comment #207
Also, this : https://xdaforums.com/t/usb-connection-problems-in-windows-7.3158187/.
You can also check this video starting from minute 3:

The Samsung R910 Galaxy Indulge 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 R910 Galaxy Indulge 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 R910 Galaxy Indulge 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 R910 Galaxy Indulge 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/replace-long-press-home.829481/

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

Using a very sharp, thin utility knife or hobby knife, carefully and gently (do not slip and cut the board!) etch a new, shallow, flat slot across the screw head. Teardown Guides: Find a high-quality, model-specific teardown guide (e.g., from iFixit or YouTube). Typically indicative of grounding issues or interference from alternating current (AC) power lines (a "ground loop"). - The Wi-Fi issues appeared suddenly and severely after a drop, impact, or recent phone repair. Measuring voltage drop across these can indicate current flow even without a DC supply with a built-in ammeter. Caution: Ensure solvents do not seep into internal components, especially if the phone is not fully disassembled. Customer Report: Provide the customer with a copy of the diagnostic report, highlighting the before-and-after results, which builds confidence and transparency. Use with extreme caution, as they can scratch frames or damage internal components. It's less drastic than a factory reset and doesn't delete personal data. Prying Too Deeply: Not knowing the internal layout can lead to severed flex cables or damaged components. While rare, physical damage (e.g., from a drop) could damage the LED or its connection. Monitor the current draw during boot-up, standby, and critically, when the phone is actively searching for a signal or attempting to make a call. Confirm the motor is now vibrating correctly and with appropriate intensity. Apply Flux: Apply a small amount of liquid or gel flux directly over and around the damaged resistor and its pads. Sometimes a tiny resistor or filter in the ground path can be damaged, causing high resistance. Epoxy/BGA Underfill (Optional): For very high-stress areas or wires connected to tiny BGA pads, a microscopic dot of quick-cure epoxy or BGA underfill can provide even more robust mechanical reinforcement. You're looking for lint, dust, pocket fluff, food crumbs, or corrosion. Boot into Safe Mode (Android) to rule out third-party app interference. Charging While Draining: In extreme cases of slow charging, if you're using the phone heavily while it's plugged in, the power consumption might exceed the charging rate, leading to a net loss of battery percentage. HIGH RISK: This method is highly destructive if not done with extreme precision. App Activity Loggers: Some specialized apps can track which applications are active, when they start/stop, and if they crash. RAM-Intensive Applications: Download and run a few known RAM-intensive games or benchmarks. The Bending Process (Method 3: Gentle Tapping with Rubber Mallet - For specific localized bends): The phone should now detect the SIM card and attempt to register on the cellular network. Damaged Antennas: Internal antennas (tiny components, often integrated into the frame or on flex cables) can be damaged by drops or water. If you’re unsure at any stage, it's always safer to consult a professional technician.4. Partial Unresponsiveness / Dead Zones: Specific areas of the screen do not respond to touch. Donor Logic Board (Recommended): The safest source for a new, working PMIC of the exact same model and revision. NAND Programmer Tools: Specialized tools (e.g., JC P13, WL, iRepair P10/P12 for iPhones; EasyJTAG Plus, UFI Box for Android eMMC/UFS) are invaluable. A faulty PA can manifest in several ways, primarily affecting the phone's ability to transmit data and voice.

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