Tascam 688 shtl pcb 52102770-00

Board from a 688 and maybe common in some others ,I get asked for this often

 

The 688 was really the flagship analogue portastudio amazing what the could get on 1/8 inch tape

I was amazed how heavy and how big the machine was must be 15 kilos maybe,

Nearly all the boards inside are with connectors so its one  that can be serviced easier