Parasound Zamp v.3 manual 8TYPICAL PROBLEMS AND REMEDIES, No sound, Background Hum

8TYPICAL PROBLEMS AND REMEDIES

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.