Bluetooth Headphone Not Working
Received one Bluetooth Headphone for repair.
Problem reported by the customer: Headphone is not turning ON.
On initial inspection I found headphone is not turning ON but it is working OK on Aux Cable. Here headphone is not working because it does not power ON. Bluetooth is required Power to turn “ON” & through Aux cable it runs directly connected to the device it does not required Power. So for further inspection I opened the one side of the head unit which is having charging port.
Here reported no power ON issue Leads suspected area to battery section. I checked this side of the section it doesn’t have battery this side.
So I have to open another head device to reach battery section.
I found battery in this unit
Took out the battery for testing
Checked battery voltage it is showing totally drained. reason is either Battery is not getting charging voltage or battery itself is bad. For confirm bad battery, I have to check battery out of the circuit.
After removing battery, I removed the sleeve & I found main red +ve wire of the battery is open from the charging circuit wire Joint.
Checked battery charging circuit output voltage, it is showing 4.17v DC seems ok.
Suspecting battery is not charging because of open circuit; so to confirm the same I re soldered the battery on charging wires & kept the unit for charging for 3 Hrs. Then I checked voltages on the battery & now battery is showing 3.9v
Because of open circuit of the charging wire; battery is not charging hence headphone is not powering ON.
Tested headphone on Bluetooth now it is working.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check his previous repair articles on USB Pen Drive Data Recovery
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Parasuraman S
December 3, 2022 at 8:19 am
Very minute work, handled diligently! Well done!
Yogesh Panchal
December 5, 2022 at 10:49 pm
Thank you! Sir,
Tayo
December 3, 2022 at 2:03 pm
Nice catch! I like to upgrade the battery with larger capacity ones that I pull from other devices.
Yogesh Panchal
December 5, 2022 at 10:51 pm
Thanks! Tayo
you can use if it fits inside the device.
Waleed Rishmawi
December 3, 2022 at 3:31 pm
i have exactly the same speaker in my shop that belongs to my nephew. the main problem with it is the actual speaker, there is sound only on the right side of the speaker and upon testing, the speaker is open and needed a new one but was costly to buy. thanks for sharing and have a blessed day
Yogesh Panchal
December 5, 2022 at 10:54 pm
Waleed,
Only option is salvage the parts for future repair.
Albert van Bemmelen
December 3, 2022 at 3:48 pm
These 3.7V Li-Ion Lithium Li-Po Polymer battery packs, like the 230mAh 402030 packs are often bulged and defect. And used in smartwatches and other portable devices. Luckily you found your LiPo was still in good condition here.
Yogesh Panchal
December 5, 2022 at 10:57 pm
Albert,
This parts are suppose to wear & tear type.....