YAMAHA R-N402 R-N402D SM EN Service Manual download, schematics, eeprom, repair info for electronics experts
Yamaha Receiver R-N402D - Music from external HDD - YouTube
PMX-402D USB Yamaha 4-6 channel 500 watts x2 Suitable for 15 inch 2 way passive speaker 500 to 800... - Mina Electronics - Mixer Lights Amplifier Karaoke Videoke | Facebook
Yamaha R-N402 Network stereo receiver with Wi-Fi®, Bluetooth®, and MusicCast at Crutchfield