Parasound Zamp v.3 - Manual (Page 10)

TYPICAL PROBLEMS AND REMEDIES
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No sound
- Check that AC is live.
- Check that input cables and speaker wires are secure at both ends.
- Make sure the control preamp/receiver is switched to the correct input.
- Is the unit on? Check setting of the Auto On switch.
- If using Auto turn on, increase the sensitivity of the audio trigger.
- Is the Hi-Temp or Protect (or both) illuminated? Check for excessive temperature, short circuit-
ed speaker wires, low impedance speaker load, and inadequate ventilation to remove heat.
Background Hum
- Move the Ground switch to Lift.
- Move audio cables and AC cords away from each other.
- Try different routes for the audio cables and AC cords.
- Make sure insulating shoulder washers are used if unit is rack mounted.
- Try reversing the direction of the AC plugs in other components, one by one.
Distorted and Weak Sound
- Check the position of the Mono-ST switch. It must be in ST to play stereo.
- Make sure the load impedance is not below 4 ohms.
- Make sure the gain of the preamp is not set too low.
- Make sure the gain controls of the Zamp v.3 are not set too low.