Just select CD or AUX input. The tuner section consumes very little power.

| Problem | Likely Cause | Solution | |---------|--------------|----------| | No power | Power cord loose | Check connection | | No sound | Wrong source / mute | Select correct source, unmute | | Weak FM reception | Antenna not connected | Attach FM wire antenna | | CD skips | Dirty disc or lens | Clean disc; use lens cleaner |

You need an external phono pre-amp. Connect it to AUX. The manual explicitly states this on page 4 (top section).

He set the UDM-3 on an iso-pad and sat in front of his desk, imagining himself in the engineer's chair. The manual recommended an initial flat EQ and a 1-meter listening position. The instruction was simple: listen, then tweak. It felt more like etiquette than a rulebook.