Electronics > Repair

Please help me identify this component (BD1)

(1/3) > >>

RocknRoll:
Hi

Last night, I connected my Creative SoundBlaster Jam BT headset to charge and I heard a pop sound accompanied with the smell of a burnt component. I opened up the headphone to find the circuit shown in the attachement. It seems to be a protection circuit but I have no idea. Would you be able to help me find out what this component is so that I can repalce it ? It seems to have been labeled as BD1 which is next to another component that is ESD1.

I am assuming both ESD1 and BD1 are diodes. However, when I used the diode test function on my multimeter and ESD1 showed nothing. It did show a stable 200kOhm resistance though.

Any help would be appreciated.

Best
Jai

fzabkar:
You should check the other side of the PCB for damaged components. Also confirm that your charger is outputting the correct voltage.

RocknRoll:
Sorry, I realized that I was not being clear. BD1 had completely burned hence there is nothing there (I wiped it with a tiny bit of IPA). There is nothing unusual on the back the of the circuit. It appears that BD1 is the only element that completely burned.

Best wishes
Jai

fzabkar:
Here are internal photos from the FCC web site:

https://fccid.io/IBAAVPGH0300/Internal-Photos/Internal-Photos-2479160

The damaged component does not appear to have a stripe, so it may not be a diode.

There appears to be another BD0 (or BD8?) part connected to VBAT- (near switch S1 on the other side). Try measuring that.

There is also a BD2 (or 6D2?) near J1.

I suspect that BDn are EMI Suppression Ferrite Beads:

https://www.mouser.com/new/wurth-elektronik/wurth-we-cba-ferrite-beads/

There are other ESDn components adjacent to each switch. Measure those.

Here is the datasheet for the main IC:

CSR8635, Cambridge Silicon Radio Limited, Bluecore single-chip Bluetooth ROM audio solution:
https://www.openhacks.com/uploadsproductos/csr8635-datasheet.pdf

abdulbadii:
Might be diode bridge

 TVS diode for ESD protection might be labeled/abbreviated ESD, it is a kind of Zener diod

Navigation

[0] Message Index

[#] Next page