Just started recapping a sansui 881. The tuner circuit board that is listed in the service manual and everywhere I look on line is F1507. My 881 has a different PCB all together, F 2549. I have been able to find that particular board listed as part of a model 9090. I’m curious if anyone has ever seen anything like this before. It is factory original. I understand that sansui made substitutions but this is strange. I’m new to recapping but it looks like not all of the board was used either. I will include some photos. What need is a parts list and schematic to assist with recapping. Thanks for any help.