Just finished my DAC (1541A) , but 無聲出. Need Help!!!

Bong,

L1 = 5V OK
L2 = -13V (Problem, should be -15V)
L3 = -5
L4 = 5
L5 = 5
L6 = 5
C29 = 15V
C30 = 15V

TDA1541A have 3 diff voltage need.
+5V
-5V
-15V

KK

Chance is less less....

All of the chip will test it before sending to overseas.

Step by step:

1. input the digital signal into DAC
2. Plot the waveform of CS8414
Pin 11,12, 19,26 to me.

Pin 7 and 22 should be 5V.

Please feed the coaxial signal direct to CS8414.
Skipping any pulse transformer and coupling cap.

Your CS8414 no data out !!!

Bong,

Please check with the diagram. And connect as like this.

RE-plot the waveform again and show it.

FYI:
We have 3 class about using this board also no problem, can you use our supplied components to assemble first, once OK, you change to yours as you like.

Bong,

I need to point out the TDA1541A KIT is work, no bug and mistake on the board. If you need to use DIR9001, it need some modification.

That why I tell you using the default components to power on the board first.

The chance of the CS8414 dead is lower.

Bong,

Good work.

But I saw you have capacitor in your first post.....(the small brown color one)

One word to said, (not cannon after the horse)

See the photo.

I will ask admin to send out the notes. (by reduce the size first)