Hello list In my ts850 i need to replace the DSP chips 6631 with 66312 , there are 4 of them on the car unit 2 are already 66312 but the other 2 are 6631 and defect note that 6631 is used at year of build 1992 in all kenwood ts850s and will fail sooner or later They cost at kenwood belgium 53 $ each , thats a lot of monay ! Anybody on this list has a better (cheaper ) idea , adresses ... ?