I had enough spending time and money trying to fix my expensive Pioneer AVH-Z9250BT and what supposed to be top quality brand.
I would not buy Pioneer again.
I moved away to a Chinese Android head unit and I'm very happy so far.
Here are images for AVH-Z9250BT:
https://mega.nz/folder/VdojTTDQ#GP8GTdIxvKu8H0bTRH-4GQ
Please let me know if you have any luck with this.