Introduction
One issue faced by some users with the JBL Tune 770NC's is problems with the ear pads, specifically noise cancelling issues and problems with the ear pads falling off. A fix for these issues could be to replace the ear pad on the side or sides that are causing issues. For this guide you will need an opening tool of some sort, a metal spudger works best as a last resort. If available please use a Halberd spudger, or a jimmy. This replacement is relatively easy, and should not take very much time.
Tools
Conclusion
To reassemble your device, follow these instructions in reverse order.