Peace upon you all ! I am new to this forum ; I just bought a 2 tracks revoxA77 and i'm looking for informations online since RCA output CH1 doesn't seem to work, neither when playing a band, nor listening to my source...

both inputs seem to work ( since vumetres are both working )

Headphone output has the same problem : i can only hear one side.
Does anyone has knowledge with these Revox ? maybe some of you had a similar problem ! which component might be involved ? I'd need to know the circuit sound takes from input to output ... sorry i'm a little confused ... anyway facepalm
Thanks a lot for your advices ! have a good day !