THESE WORK ON MY IC-7610. HOPE THEY WORK ON OTHER ICOMS TOO.
For adjusting the brightness levels of the rigs waterfall without lowering/raising the signal:
REFERENCE LEVEL -0 db *1w \0xFE\0xFE\0x98\0xE0\0X27\0x19\0x00\0x00\0X00\0x01\0xFD
REFERENCE LEVEL -5 db *1w \0xFE\0xFE\0x98\0xE0\0X27\0x19\0x00\0x05\0X00\0x01\0xFD
REFERENCE LEVEL -10 db *1w \0xFE\0xFE\0x98\0xE0\0X27\0x19\0x00\0x10\0X00\0x01\0xFD
REFERENCE LEVEL -15 db *1w \0xFE\0xFE\0x98\0xE0\0X27\0x19\0x00\0x15\0X00\0x01\0xFD
REFERENCE LEVEL -20 db *1w \0xFE\0xFE\0x98\0xE0\0X27\0x19\0x00\0x20\0X00\0x01\0xFD
REFERENCE LEVEL -25 db *1w \0xFE\0xFE\0x98\0xE0\0X27\0x19\0x00\0x25\0X00\0x01\0xFD
REFERENCE LEVEL -30 db *1w \0xFE\0xFE\0x98\0xE0\0X27\0x19\0x00\0x30\0X00\0x01\0xFD
REFERENCE LEVEL +5 db *1w \0xFE\0xFE\0x98\0xE0\0X27\0x19\0x00\0x00\0X05\0x00\0xFD
REFERENCE LEVEL +10 db *1w \0xFE\0xFE\0x98\0xE0\0X27\0x19\0x00\0x00\0X10\0x00\0xFD
Changing the Spectrum Scopes Waterfall Marker from FIXED to CENTER
SPECTRUM SCOPE FIXED *1w \0xFE\0xFE\0x98\0xE0\0X27\0x14\0x00\0x01\0xFD
SPECTRUM SCOPE CENTER *1w \0xFE\0xFE\0x98\0xE0\0X27\0x14\0x00\0x00\0xFD
Changes the brightness of the RADIO DISPLAY:
LCD BRIGHTNESS 10% *1w \0xFE\0xFE\0x98\0xE0\0X14\0x19\0x027\0xFD
LCD BRIGHTNESS 20% *1w \0xFE\0xFE\0x98\0xE0\0X14\0x19\0x052\0xFD
LCD BRIGHTNESS 30% *1w \0xFE\0xFE\0x98\0xE0\0X14\0x19\0x078\0xFD
LCD BRIGHTNESS 40% *1w \0xFE\0xFE\0x98\0xE0\0X14\0x19\0X1\0x003\0xFD
LCD BRIGHTNESS 50% *1w \0xFE\0xFE\0x98\0xE0\0X14\0x19\0x1\0x030\0xFD
LCD BRIGHTNESS 75% *1w \0xFE\0xFE\0x98\0xE0\0X14\0x19\0x1\0x090\0xFD
LCD BRIGHTNESS 100% *1w \0xFE\0xFE\0x98\0xE0\0X14\0x19\0x2\0x055\0xFD