Grounding screw located right next to the Phono inputs. Always connect your turntable’s ground wire here to eliminate low-frequency electrical hums.
I can look up technical service bulletins or specific component matches for your setup. Share public link Kenwood Amplifier A-5j Manual
Once you have the manual, your responsibility shifts to preservation. Here is how the manual recommends storing the unit: Grounding screw located right next to the Phono inputs
If you want to dive deeper into the technical side of your audio setup: Tell me what you are pairing with this unit. Kenwood Amplifier A-5j Manual