Hi can anyone advise on the indications and function of this beast regarding tape copy. the issue i have is as follows the stop function works when the switch is pressed but no led display  [STOP]  ilumination on PCB 4 it is installed  also it stops immediately NOT with the 4 second delay on TAPE 1 & 2  im lucky enough to own the origonal repair manual and i can see where the function  inputs  go to 17IC1 and the display clp to PCB 3 but no STOP led is listed? im guessing i have a fault but no idea