My awesome Lasonic LPC-990 3 piece gets FM stations in only mono.They amber indicator on the tuning marker will at times blip red,but will never hold a stereo tune.Some time ago I heard that there was a screw adjustment for this on tuner boards.However,I am not sure where this might be located.Below are pictures of the 990's tuning board.The top picture shows it from its topside.The picture below shows the board from its underside on the big wheels end of it.I can see a number of pieces with screw slots on them but I'm not sure which of these might do the trick.Has anyone an idea?