I saw your message on the OFA forum but thought I would answer it here. The 4803 has the following commands according to the Denon Website. These have been translated so you can use MakeHex. You could also use them with an OFA remote and teach your Sony remote or any other learning remote.
Dev(D)Function(F) 02 193 POWER 02 195 PHONO 02 196 CD 02 197 TUNER 02 200 DBS/SAT 02 201 TV 02 202 VDP 02 204 V.AUX 02 205 VCR-1 02 206 VCR-2 02 207 VCR-3 02 210 MD/TAPE-1 02 216 VIDEO SELECT 02 219 MULTI 02 220 INPUT MODE ANALOG 02 221 CURSOR RIGHT 02 222 STATUS 02 223 ON SCREEN 02 224 ENTER 02 225 POWER ON 02 226 POWER Off 02 227 DVD 02 228 DOLBY SURROUND 02 230 DSP SIMULATION 02 234 TEST TONE 02 237 SPEAKER 02 240 MUTING 02 241 MASTER VOLUME UP 02 242 MASTER VOLUME DOWN 12 127 CURSOR LEFT 12 129 DTS SURROUND 12 130 SURROUND BACK ON/OFF 12 137 STEREO 12 141 MULTI VOLUME UP 29 12 142 MULTI VOLUME DOWN 12 158 DIRECT 12 160 SYSTEM SET UP 12 161 SURROUND PARAMETER 12 163 CURSOR UP 12 164 CURSOR DOWN 12 168 5CH/7CH STEREO 12 172 AUDIO FUNCTION 12 173 VIDEO FUNCTION 12 175 CH SELECT 12 176 CH VOLUME UP 12 177 CH VOLUME DOWN 12 181 INPUT MODE EXT.IN 12 182 INPUT MODE 12 185 TUNER SHIFT A 12 186 TUNER SHIFT B 12 187 TUNER SHIFT C 12 188 TUNER SHIFT D 12 189 TUNER SHIFT E 12 193 TUNER PRESET CH 1 12 194 TUNER PRESET CH 2 12 195 TUNER PRESET CH 3 12 196 TUNER PRESET CH 4 12 197 TUNER PRESET CH 5 12 198 TUNER PRESET CH 6 12 199 TUNER PRESET CH 7 12 200 TUNER PRESET CH 8 12 204 TUNER MEMORY 12 205 TUNER SHIFT 12 213 TUNER PRESET DOWN 12 214 TUNER PRESET UP 12 215 TUNER BAND 12 216 TUNING MODE(AUTO/MANUAL) 12 217 TUNER TUNING UP 12 218 TUNER TUNING DOWN 12 223 DIMMER
