A humming sound during playback. - Technics
Problem: A humming sound is heard during playback.
Possible Causes and Solutions
1. Nearby AC Main Lead or Fluorescent Light
Cause: An AC main lead (power cord) or fluorescent light is near the unit’s cables, causing interference.
Solution: Keep other appliances and power cords away from the cables of this unit.
2. Magnetic Field Interference
Cause: A strong magnetic field from a TV or other electronic device may adversely affect audio quality.
Solution: Keep the unit away from TVs and other devices that emit strong magnetic fields.
3. Noise from Radio Waves
Cause: Nearby devices emitting powerful radio waves, such as mobile phones during calls, may cause noise through the speakers.
Solution: Move mobile phones and other devices emitting strong radio waves away from the unit.
4. Incorrect Earth Lead Connection
Cause: For models that have an earth lead, improper connection can result in humming sounds.
Solution: Ensure the earth lead is correctly connected.
5. Attenuator Switch Not Set
Cause: For models with an Attenuator switch, it may not be enabled, leading to interference.
Solution: Set the [ATTENUATOR] switch to [ON]. The switch is located on the rear panel.
6. Turntable model SL-1500C only
Cause: Are both PHONO output terminal and external output terminals simultaneously connected to the device?
Solution: Connect one or the other.
When connecting to the PHONO output terminal, set the external output switch to "OFF".
By addressing these potential causes, you can reduce or eliminate the humming sound during playback. For additional assistance, consult the Operating Manual.