[SOLVED] I'm looking for Archos 50 Saphir LTE repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Archos 50 Saphir LTE. 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.

@Guadalupe

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 Archos 50 Saphir LTE 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/bluetooth-virus.4688722/
Take a look at comment #756
Also, this : https://www.ifixit.com/Answers/View/175875/1-Inch+Left+side+not+responding,+Ghosting.
You can also check this video starting from minute 10:

The Archos 50 Saphir LTE 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 Archos 50 Saphir LTE 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 Archos 50 Saphir LTE 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 Archos 50 Saphir LTE 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/Troubleshooting/Philips_Somneo//627218

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

The heating and cooling cycles should be gradual, allowing the board to come up to temperature slowly and cool down naturally after the component is removed or installed, further minimizing thermal stress. Inspect Other Flex Cables: Ensure all other critical flex cables (e.g., display, charging port, power button, sensors) are properly seated and free from damage or corrosion. Make sure all button mechanisms are properly aligned and that their tactile feedback is good before fully securing them. Clean the residual solder from the pads on the motherboard using solder wick/braid and a soldering iron. This option clears temporary system files without deleting your personal data. Device Orientation: Place the device on the stable surface in a consistent orientation. If damage is found, it may require trace repair using fine jumper wires and UV-curable solder mask, which adds complexity to the repair. However, for those with the necessary skills and patience, it can be a highly rewarding fix that restores critical functionality to a smartphone experiencing frustrating signal problems, saving it from premature obsolescence. No Charging: The phone doesn't react when a charger is plugged in, or shows no charging icon. Liquid Damage: Look for any signs of liquid ingress or corrosion around the sensor module or its connector on the logic board. Carefully transfer all the small components identified in the previous step from the old mid-frame to the new one. An oscilloscope is ideal for checking if the oscillator is producing a stable, correct frequency signal. Flex Cable: Inspect the flex cable that connects the wireless charging coil to the logic board. Testing: Reassemble the phone and thoroughly test all functions to ensure the coating hasn't interfered with operation. Apply Heat: Gently and evenly heat the area around the camera lens glass using a heat gun on a low setting. Rushing will lead to mistakes and potentially further irreversible damage. Replace Flex Cable/Speaker Unit: If the issue persists after cleaning and reshaping contacts, or if damage to the flex cable or speaker unit's ground path is irreparable, replacing the entire speaker unit or the flex cable it's attached to is the next logical step. Several types of conformal coatings exist, each with different properties. The Power Management Integrated Circuit (PMIC) is the heart of this system, responsible for regulating and distributing power. Reballing Stencils and Solder Balls: If you're reballing a retrieved PMIC or buying non-balled new chips. The underlying LCD display is perfectly functional (no dead pixels, no discoloration, full backlight). Place the red probe on a known ground point and the black probe on the suspected power rail or component pad. After replacing a non-OEM component, an OS update might inadvertently make the component completely incompatible by updating its required firmware driver to a version that only supports genuine OEM parts. Remember, safety first, patience always, and when in doubt, consult a professional.## 4. Locate EMMC/UFS Chip: Identify the EMMC/UFS chip on the motherboard using schematics. Speakers (Earpiece and Loudspeaker): The tiny mesh grilles covering your speakers are designed to protect the delicate drivers inside while allowing sound to pass. Often, what appears to be a serious hardware problem can be resolved with simple software troubleshooting. Circular Polarizers: Often found on OLED displays or sometimes used in conjunction with linear polarizers on LCDs, circular polarizers transform linearly polarized light into circularly polarized light (where the electric field rotates as the light propagates) or vice-versa. Reinstall Logic Board: Carefully place the logic board back into the phone housing. Are you too far from your router? Are there many physical obstructions (thick walls, metal objects) between your phone and the router? Are there many other Wi-Fi networks in your vicinity causing interference? While these aren't phone-specific issues, they can manifest as a "weak signal" on your device.

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