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Motorola H500

Here’s the start of the dis-assembly of the Motorola H500 Bluetooth headset and this is where you’re most likely to damage the case if you’re not careful. First insert a thin blade screwdriver underneath the rounded section of the silver insert as shown in the photograph. You’ll need to carefully pry up. There’s at tab underneath holding down the cover. You need to pry pretty hard to get the tab to come loose. Look at the next picture if you’re unclear.

H500_1

Here you can see the cover removed with the 3 tabs identified that hold the cover on. You need to pry hard enough to pop the tab under the rounded portion loose and then slide the cover toward the back of the ear-piece to get the rear 2 tabs to disengage.

H500_2

With the cover off you now have access to the 3 screws that hold the rest of the cover on. One central screw underneath the silver Motorola emblem (it’s just held in with double-sided tape) and two screws that were on the rear of the head-set underneath the cover you just pried up.

H500_3

With the screws out, it’s easy to remove the rest of the plastic cover and expose the circuit board. If you’ve come this far remember to stick all the loose bits into a container where you don’t lose them!

H500_4

You should be able at this point to flip the circuit board out. In this picture, the microphone is inside the white plastic enclosure on the left. The speaker is still inside the center of the bottom case. The large (that’s relative!) silver square on the bottom of the circuit board is the battery, with the USB connector hanging out on the far right. Interesting markings on the battery such as Model: Artemis H500 Software version Beta_28.1 Great, I’ve got em>beta
software. No wonder I’ve had the dred ‘clicking’ problem when talking in this headset. Wonder if ‘Artemis’ is
Artemis Wireless Werks
in Austin, TX?

H500_5

Close-up of the circuit board. Note the grounded soft copper foil EMI shield over the main IC. Other interesting thing is what’s marked
as TP11, looks like some kind of interface connector. Anyone have an idea of the pin-out?

H500_6

Here’s same image with the copper foil flipped up. Anyone recognize the IC? 31A2 ?something?

H500_7

2 comments

  1. gabe

    Hi!
    I’ve just bought one of these, but it has a fault. The other person im talking to is constantly hearing a buzzing noise, which is most probably fom interference. So I took it apart, with the help of this guide, so thank you:) But it was a bit different on the inside, it didn’t a protective foil over the main IC. So i thought if i made one myself, maybe the interference problem would be solved. But it didnt’t. I wonder whether you have the same problem with the interference? Many people complained about it on the web. The other difference is the shape of the antenna, mine is a bit longer. But is doesn’t seem a fake headset, its well fabricated not like the fake ones.

    Regards: Gabe from Hungary

    1. admin

      Unfortunately, same here. Bad buzzing noise no matter what I used the headset with and yeah, once I searched it was all over the Internet, people complaining about the buzz. Never did see a way to easily fix it. I’m guessing it’s a power issue, switching noise or just poor circuit board design routing the mic lines near some digital lines.

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