Yaesu FT-100D (FT 100 D FT100D) user and service manual, modifications

   1.    microphone output           white
   2.    +8 Vdc input                red
   3.    frequency up/down           blue
   4.    not connected
   5.    PTT                         yellow
   6.    GND (PTT ground)            black
   7.    GND (mic ground)            shield
   8.    not connected

FT-100D Yaesu transceiver microphone wiring

Mic-jack Yaesu FT-100 / 90 / 8100

   1.   SW 2 multi-function switch
   2.   N.C. (9600 bps packet data output FT-90)
   3.   + 9 Vdc
   4.   DNG
   5.   Microphone input
   6.   SW 1 PTT, Up and Down

Connections FT100D - SM20

ATTENTION : with this connections, UP and DOWN keys don't work.