K8095 MP3 Player - No LCD

Kits Audio Hi Fi Projects
1

Dears,
After assembling the MP3 K8095 , only LED 4 is on. all other LED’s are off , can not play or hear any music , when I click play button , play LED is not affected.

Any one can help with troubleshooting guide lines for this circuit.

2

First, you must check if the power section is OK.
Check between ground level and pin 20 if the PIC controller, if you measure around 3,3V.

3

Thanks,
The reading is right 3.3 V on pin 20 of the PIC .

4

Next you can check that the SD card insert detection switch is operating correctly.
Check the voltage on pin 5 of IC3.
There should be 0V when the SD card is inserted and 3.3V when the card is ejected.

5

It shows 3.3 V in both . SD inserted or out .

As of the previous Step , PIC do you mean IC3?

6

Please check this soldering.

Please make sure you have soldered the SD card connector shield to the soldering pads.

[quote]As of the previous Step , PIC do you mean IC3?[/quote]Yes, PIC is IC3.

7

Hi,
Soldering was OK , but as I understood that when Inserting the SD , SD card connector shield will be connected to ground so it will drop to zero , I found a mechanical problem while insertion the SD .
Fixed and Now it is working fine.

Thanks for your support .

8

Hi, my voltage on pin five is reading 3.3 with the card in and 0 with it out, my lcd screen has black rectangles when i turn up rv1 all the way, but thats all

9

The SD card detection seems to work OK.
What happens if you put some MP3 files on the SD card, insert it, and then press the Play button SW1 ?

10

The line of black rectangles blink, the the first rectangle blinks. Also LD2 is now on

11

Is the LD1 off all the time - even if you press the SW1 several times?
Does the LD2 turn of if you press SW6 ?

12

No to both of those

13

Yes LD1 is off no matter what, LD2 is on no matter what

14

Sorry,* if i press sw1 several times LD2 blinks

15

All the results indicate that the kit is defective.
After checking all the components and all the soldering - if everything seems to be OK - then the only choice is to send the kit for check/repair.

16

How could i go about doing that

17

Please return kit to:

Velleman Projects Tech Dept.
Legen Heirweg 33
9890 Gavere
Belgium

18

I’m in the United States, whats your shipping policy for defective kits?

19

I think there in this thread is some info how to proceed:
viewtopic.php?f=2&t=7530