You can find similar technical resources and firmware dumps on professional repair forums like Kenotrontv or Monitor.net.ru .
Part of a split RAR archive (indicated by part03.rar ). You will need all parts (e.g., part01, part02, etc.) to successfully extract the firmware binary file [User Query]. General Installation Instructions Download SK506S PB802 1920x1080 Akai REF68 part03 rar
Akai REF68 (indicates the panel configuration specifically for Akai models) [User Query]. You can find similar technical resources and firmware