Tone 1.3 unsoldered SPDIF Chinch -> VIM3 Audio lost

Hello,

here is my setup:
VIM3 Pro with most current Android
ToneBoard v1.3 connected with SPDIF (3 wires) and power (2 wires)

After unsoldering the SPDIF-Chinch there is no more tone.
I checked the SPDIF Line with my oscilloscope, the data is coming and seems ok.
SPDIF_IN_MODE is HIGH
SPDIF_MODE is LOW

Do you have any explaination and solution for this?
The tone is working fine via usb.

Thanks in advance.