My Kilburn (gen 1) Speaker when turned on would illuminate the Red Battery/Bluetooth LED for 2-3 seconds before fading and turning off. Int hat time it is audible that the speaker turned on and off.
I ordered a replacement battery thinking that the original battery was no good. The new battery caused the same issue. This led me to believe there are other problem. I looked further more by opening up the board and seeing the attacked images of what appears to be a damaged C111, and U15.
I do not know what C111’s value is nor can i measure it without another device.
U15 is CN3704, a PWM switch-mode lithium ion battery charger controller for 4 cell li-ion battery in a small package . I was able to find this out thanks to another post ([post|582364] ) images and zooming in. But not sure what the number beneath it is and am worried to buy the wrong part.
[image|2120665]
What is U15 and C111?