Trying to Fix - Sennheiser PXC 550 Headsets (x2) - Will Not Power and Stuck Button
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- Опубликовано: 23 ноя 2022
- 2 pairs of Sennheiser PXC 550 headsets bought from Facebook Marketplace for $50 for the pair (currently retailing between $2990 and $399 a piece - www.amazon.com/Sennheiser-PXC...)
Complaint 1 - Will not turn on
Complaint Set 2 - Will not turn on and Bluetooth pairing button is stuck
Can I fix it?
This is not a tutorial video! 
Хобби
Thank you for sharing with the world 😎 how you approach fixing stuff! I've viewed a few videos about these cans' power switch issues. "Although" its the lengthiest, yours also was most fun to watch.
The simplest solution I got to work is to connect the "+" pad underneath the BT switch PCB to the hall sensor's connection point on the main PCB.
Connecting the wire to the hall sensor's active point on the PCB (the one next to the ribbon connect that is closer to the earpiece's shell) took me a bit of trial-and-error. It definitely helped to add some solder to that point first, before soldering the wire into place. Holding the wire in place with tweezers also massively helped.
Two important points:
1. As @superspeeder already wrote, its important to use a good length of wire, and route it from _underneath_ the switch PCB. Place the wire in a bow across the main PCB inside the earpiece shell. Otherwise, that wire will get in the way when you re-insert the speaker module into the shell.
2. @co2588's description sounds similar. However, the middle pin on _top_ of the switch PCB is actually connected to the ground plane of the main PCB. You can verify this with a continuity tester. By connecting the wire to this point, the headset will be switched on all the time… It's actually the left pin on top of the PCB (when looking at the PCB from above with the switch facing away from you) that is connected to the positive BT lead. In any case, though, I suggest you solder the wire to the bottom of that PCB, as per point 1. above.
Good luck!
thank you for the video.
I'll share with you what I did. Solder a wire from the MIDDLE pin of the Bluetooth switch to the small dimple next to the reed switch (as shown here). There is NO need to do the shorting of the Bluetooth switch as the button turns the headphones on, while at the same time turning on Bluetooth. I hope that saves people some time. cheers
@co2588 Please can you share more on this? I need to fix my headset :(
@@GroLikeAPro I also need to fix mine.
I guess by "the small dimple next to the reed switch" he means the one at 18:16, and "MIDDLE pin of the Bluetooth switch" would be the middle one of the piece at 20:20 ?
Thanks for this! I have a set of first gen PXC 550 with the same power switch issue. Tried adding a magnet to the switch, no go, then found your video.
Tip: when adding any decent size wire (larger than what you're using here) go up beside the switch board and across from the side. There's very little room between the switch board and the earcup, and any thickness of wire with insulation will not fit in the gap, preventing reassembly and risking breaking the wire.
Muchas gracias por este aporte te felicito porque eres un crack
Would you be able to use a slightly bent paperclip or other stiff wire to carefully press the effect/pairing button through the broken button's hole in the case when it's reassembled?
Great fix for the money! Did you happen to run into any charging/light indicator issues?
Maybe looking around online you would be able to find a button that is able to do the clicking. Maybe some spare parts websites?
Hi how i can Bluetooth Bluetooth 4.2 .5.0 version.Which Bluetooth module should I buy?
Have you had a go with a Momentum 2 having water damage?
Mine powers on but bluetooth unit seems to have stopped working after water getting into it. Or where I can find a part to replace it.
I think I fixed it fow now. Opened it and gave contacts around the ribbon cable a quick clean. Let's hope it works for me for a while. But if you ever open one I'd like to learn how to fix one. The Momentum 2 is truly one of the good headphones out there.
Keep up the great work
it would be nice to have some indication where in this 43 minute video the solution is, or if indeed there is one.
Also adding a microswitch to on off the device would be nice, i have a pair with the same stuff, im planing on fix it on 3 days when my tools from amazon are coming, i was just thinking on just adding a microswitch and do a mini hole with my mini drill to glue that small switch 🤔
You're the best Thank you so much for sharing this with me!! You are late to the party - *Promo sm* !!!