China made Wireless Speakers - 5

I purchased this even I knew that it did not work, solely for the purpose of checking inside.

I already destroyed four similar no brand (generic) China made Wireless (Bluetooth) Speakers. So I am a bit familiar with the inside.

1. JL or JC logo (highlu likely JL or Jie Li (Technology)

https://www.hkstp.org/en/directory-list/Details/jieli-technology-hong-kong-co-limited

Part No. AC1513CF9J0T. 1- 06BT  -   Bluetooth + MP3 + etc function

I have found this JL brand IC before and introduced in China made Wireless Speakers - 2.

28 pin IC: ACCFCV56.1-07ABT

2. RDA5876 (RDA brand)  -  Bluetooth and FM Radio Chip
 (RDA was purchased by a Chinese company called "Tsinghua Unigroup")

I cannot find radio function in this mini speaker.

I have found this RDA brand IC before and introduced in China made Wireless Speakers - 2.

RDA5876: I found the spec of RDA5876P - SINGLE CHIP FOR BLUETOOTH & FM RADIO TUNE

3. 25080xxxxxx with white paint (this white paint may have some meanings)  - Flash memory

4. KDC8002 - Audio Amp   KDC brand cannot be identified.

5. L 26.000MHz Oscillator

6. One <potentiometer +  switch>  like mechanical device (which seems broken) is connected to this Audio Amp.

7. Slide switch

8.  TF (SD) card connector

9. LED

10. Microphone

11.  4 Ohm 3W speaker

12. Li-Ion Battery  still charged (showing 1.7V) - surprised me.  Then what's wrong with this mini speaker.


sptt