KEY Unit (Lot. 3~) Circuit Diagram 1.96V 5.8V 3.9V 1.92V 3.82V 4.62V 7.71V 4.95V 3.18V 3.87V 4.19V 4.34V 4.46V 4.53V 4.61V Parts Layout Side A Side B VX-4000 VHF Service Manual 6C-3