ER-102 Frozen in SYNC

Hello! I have a ER-102 for service… it is stuck with SYNC on display. When is connected to ER-101 it freezes this unit as well. All voltages are correct. All caps seem good. Nothing heats up.

The MCU receives firmware update…and enters the loader menu. I suspect the AD7607. Could anyone help me with the debug connection pinout, please? So that I can see if the ADC is tye culprit. I dont have a good oscilloscope to check the data lines on the ADC.


PS—I tried creating this topic in ER-102 / support but I get 500 Error. :frowning: