R7000.18 
 
IV The switch board
     Locate the speech switch on the SW3 board. Beware,  the
     ICOM   service   manual   has   incorrect   information
     (reversed) concerning the placement of switches on SW3.
     The  speech  switch  is  S17.  Locate the pattern/trace
     below on the solder side of the SW3 board.
 
                         o
                       /   D31
     wire A          /   o <-----------------Point P
     #_____________/    /
             _______   /
            /       \ /
           o  o---o  o     Speech switch (S17)
     #_______/
     wire B
 
     Unsolder the speech switch, the diode D31 and the  wire
     A.   Insulate the wire A so that it does not touch any-
     thing.  Solder the 47K ohm resistor where the diode D31
     was.   Solder  the  new  switch (SPUT 19167A) where the
     speech switch was, in the same  position.   Solder  the
     wire that you have previously soldered to IC8 pin 19 to
     Point P.  Solder a wire between where wire A  was  sol-
     dered and ground.  A good place to connect to ground is
     around the screw next to S18 on the SW3 board.
 
 
     Ground
                       o
                     /   47K ohms
                   /   o ------------------> to IC8 pin 19
     #_____________/    /
             _______   /
            /       \ /
           o  o---o  o     New switch
     #_______/
     wire B
 
 
     Verify your work and reassemble the unit.
 
 
V Results
     In the "out" position, the switch gives you the  origi-
     nal  99  memories,  in  position  "in" you have 99 more
     memories. These memories will be most  likely  full  of
     garbage,  so  the first step is to clear them using the
     clear switch. Clear all the 99 memories.
     This modification also double  the  program  scan  mode
     memories.   For  example,  you  can have two programmed
     scan depending on the position of the switch  when  you
     do a "SET".