Asr X input jack repair

yo folks, I just got an ASR X but left input gets volume WAY more lower than right input. Do I need a main board, a stereo phone jack (how difficult soldering is?) or some sort of special cleaning I don’t know about? Thanks

Hi there! The ASR X is a great sampler…
Highly underrated.

Does jiggling the instrument cable on the left input change the volume at all?

I wouldn’t say soldering is too difficult
but what can be challenging is removing the components without damaging traces.

Something else to check would be the tiny knob in the rear of the instrument for input levels.
Does turning this pot bring the levels back to where they should be? Does the volume jump all over the place?

Lets see if we can get this figured out!