Originally Posted by Boschpants
Owner of an MRX 520 here...has anybody had an issue where the audio input switches randomly between headphone, no signal and signal? There are relays clicking inside the unit and it goes completely sporadic. Doesn't matter if it is any of the HDMI inputs or if it's RCA either. Sent the unit in for warranty work but was curious if I am single on this issue...
I've not had this issue with an Anthem product, but did with an older receiver. It ended up being a problem in the headphone jack and the receiver intermittently sensed that headphones were connected when they were not. The relay would switch the external amplifier circuit off and the headphone op-amp on, causing the clicking. I removed the chassis cover, made a small mechanical adjustment to the jack receptacle, and all was well going forward.
Could be a similar issue on your 520.
2-Channel: PrimaLuna EVO 400 tube preamp, Bluesound Node 2i, Topping D90 DAC Theater: JVC DLA-790, Seymour AV Centerstage UF 2.40:1, Oppo UDP-203, NVIDIA Shield, Anthem AVM-60
Speakers: Selah Audio Illuminismo, SVS SB-16 Ultra (x2), Dayton RSS390 HF, Definitive technology surround and Atmos, miniDSP 2x4 HD Amplification: PS Audio BHK250 amplifier, D-Sonic M3a-2800 7-channel amplifier