I have made a overview of the main voltage of the regular dm800se tuner. Both sides, Top and Bottom. It shows two states, One with the tuner recognized, but not configured, the other configured on Astra 19.2E. Theoretically you should be able to detect some issues with the tuner if the voltages are incorrect. However, it covers not all the measurements from all parts, only the basics. But still, it's at least a opportunity to repair your tuner if you have some problems with it. Anyways, here it is, and good luck..