I will change from IC706 to IC 7100 and saw in the manual page 23 that for all ICOM radios JMP2 is used
Control-RRC only: JMP-2 is placed near the back of the RRC next to the RESET button. JMP-2
is used to select if the DC-power to the front panels should be 8 or 9 V. With the strap in
place it will be 8V, which fits all ICOM radios. Without the strap the voltage will be 9V, which
fits Kenwood TS-480 and RC-2000 panels that need 9V for the back-lighter.
BUT :
Page 108 shows : NO JMP2 for ICOM IC 7100
Is it ok or a mistake ?