Control Board Assy (680, 690, 685-2, 695-2)
 680/685-2 Startin w/Serial #1810000, see 4204280.
           Prior to Serial #1810000 see 4202811.
 690/695-2 Startin w/Serial #1810000, see 4204280.
           Prior to Serial #1810000 see 4202810.