FreePulse Wireless Headphone

These were given as a gift by a good friend. After about four months of use, the headphones themselves would not charge correctly. The charge light on the connector would blink once after plugging into the power adapter. Upon contacting Logitech for instructions on how to open and diagnose the problem (perhaps a loose wire), I received the following email from their tech support:

Sent Email to Logitech:
A friend gave me a pair of logitech pulse headphones - f-0461A
I'm having trouble repairing the power port on the headset. When I plug in the charging wire, the orange light blinks for less than a second, and goes off. I believe there may be an open some where, but can't get the darn things open. I've gotten one screw out. Does the side pop off, or is there another hidden screw somewhere?
Thank you!

RESPONSE:
Dear O,
Thank you for your e-mail
I understnad you are trying to open your headset to repair it. Unfortunately for safety reason I cannot give you any information regarding the dismateling or repair of any of our products.

Please do not hesitate to contact us again should you have any further questions or comments regarding our products or procedures.

Kind regards,

****************
Logitech Europe SA
Customer Support.

-------------------------

In Logittech's defense, giving instructions on repairs probably violates a company policy, and his response is understandable. However, on their website is the instruction manual for the FreePulse Wireless Headphones . Within are instructions for opening the headphones and wireless adapter to replace the Li Ion battery packs.

I opened the headphones, and found nothing wrong with the wiring. What I did find, was that the Li Ion battery pack to be the problem. When I disconnected the battery and allowed it to sit for five hours, plugging it back into the headsets seemed to fix the "no charge" problem.

--------------------

A second issue with the Logitech FreePulse Wireless Headphones, was the adapter. The sound level would drop to almost half.

The cause for the sound dropping to half power, was a grounding issue. Apparently the grounding wire was not making contact with the output pin.

To fix the ground wire, the device had to be connected to a CD player. The open in the wire was found where it connects to the shield for the output pin. To fix this, a small amount of solder was applied to the ground connection.