[SOLVED] I'm looking for Hmd Pulse 2 Pro repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my Hmd Pulse 2 Pro. 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.

@Maribel

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 Hmd Pulse 2 Pro 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://www.ifixit.com/Answers/View/829881/How+to+change+the+RAM+modules,+SSD+slots
Take a look at comment #1047
Also, this : https://www.ifixit.com/Guide/Microsoft+Surface+Pro+5+Front-Facing+Camera+Replacement/146977.
You can also check this video starting from minute 9:

The Hmd Pulse 2 Pro 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 Hmd Pulse 2 Pro 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 Hmd Pulse 2 Pro 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 Hmd Pulse 2 Pro 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/Answers/View/63388/iPod+5th+Generation+doesnt+play+any+song

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

Identify and remove any tiny capacitors or resistors immediately adjacent to the modem IC that might be dislodged by airflow or interfere with stencil placement if reballing. Symptoms of a dead or failing audio IC often include no audio whatsoever, or constant static/buzzing that persists even after software resets. Replace OVP IC: If the OVP IC is faulty (e.g., blocking voltage when it shouldn't, or passing too high voltage), it needs to be replaced. You will see small bubbles and possibly debris rising from the board as the cleaning action takes place. Short-to-Ground Checks: Measure resistance to ground on various test points around the RF ICs. Visual inspection is usually sufficient to diagnose a damaged display bracket. Remember, if at any point you feel unsure or uncomfortable, it's always best to seek assistance from a professional repair technician.## 2. Coil whine is a high-frequency electrical noise produced by electromagnetic components, specifically inductors or coils, found within a device's power delivery system. "Show ANRs" (Application Not Responding) can highlight apps that are frequently freezing. If all tests pass, power off the phone and disconnect the battery again. Backup your data: Before any significant troubleshooting (especially a factory reset), back up all important data. Battery Disposal: Have a designated, safe container for disposing of swollen or damaged lithium-ion batteries, following local regulations. Connect to PC: Insert the SD card into an SD card reader connected to a Windows PC or Mac. Gentle heat from a heat gun on the back of the phone can soften the adhesive, allowing the battery to be carefully pried out with a plastic tool. Earpiece Speaker: The speaker itself might be in a small housing or just under a grille. Set DC Power Supply: Set the voltage to the phone's battery voltage (e.g., 3.8V or 4.2V). High Battery Drain (Searching): A failing Baseband IC might draw excessive power while it continuously (and unsuccessfully) tries to search for a network. The most immediate is a complete failure to charge: plugging in the phone yields no charging indicator, vibration, or sound. Diagnosing a smartphone with inconsistent battery percentage readings. Important Note on Short Killers: While effective, this method essentially overloads the short to make it generate heat. Do not force the tool or insert it into any other holes (e.g., microphone holes), as this can damage internal components. Use solder wick with a fine-tip soldering iron to remove all old, residual solder. Damaged plastic/metal housing if the antenna is integrated into the frame. This comprehensive guide aims to demystify the process, distinguishing between calibration and true reprogramming, and providing actionable steps to restore sensor functionality. The backlight is responsible for illuminating the LCD or OLED display, allowing the user to see content. Replacement SIM Tray: Crucially, ensure you have the correct replacement tray for your specific smartphone model and color. These might include "No Service" errors, baseband issues, or IMEI corruption. This method is distinct from initiating a reset through the phone’s software settings, primarily because it bypasses the operating system entirely, making it invaluable in situations where the device is unresponsive, locked, or if you’ve forgotten your password and cannot access the settings menu. If performed, gently hold the motor to see if you can feel excessive movement or rattling that corresponds to the distorted vibration. Find a Teardown Guide: Locate a specific guide for your phone model (e.g., on iFixit.com or YouTube).

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