Owner's Manual

Parasound
®
ZoneMaster
™
2 Owner’s Manual Page 13
Frequently Asked Questions
The unit will not turn on
- Check the setting of the Turn On Options switch (The front panel Power button will be disabled if the
switch is set to Audio or 12V).
- Check that the AC power is live. When the AC power is live and the unit is turned off, the Power button
will illuminate red.
When using the audio trigger the amp is turning off during quiet listening
- Turn down both Level controls (12 O’clock is a good place to start).
- See page 10 for more details.
When using the audio trigger the amp never turns off
- The audio trigger circuit waits for up to 10 minutes before shutting the amp off. Try waiting at least 10
minutes after stopping the audio source.
- Ensure that the Turn On Option switch is set to the “Audio” position.
- If the amp still will not turn off then you may have too much noise (hiss or hum) in the audio signal path.
You must eliminate the source or cause of this noise. If you are unable to do this you will have to resort
to using the 12V triggers.
Front panel channel indicators are red or flashing green and red
- Check speakers and speaker wires for short circuits.
- Ensure that you have not combined the negative (-) terminals of any of the speaker outputs.
- You may have attached a total speaker load that is below the 2 ohm minimum. The total speaker load for
that channel is the combined parallel impedance of one channel. If two 8 ohm speakers are attached
the channel “sees” only 4 ohms. If two 4 ohm speakers are attached the channel “sees” only 2 ohms.
- The amp may have overheated and will not resume operation until it cools down. Ensure that you have
provided adequate ventilation especially when driving low impedance loads.
- See page 13 for more details.
Why is there no sound when using the Speaker Level Input?
- Ensure that you have connected the correct polarity at both ends of the speaker wire.
- Try reversing the polarity at one end of the speaker wire.
Why is there little sound or only very low frequencies heard from the sub?
- If you are using the Sub RCA output to a powered sub, make sure the crossover built into your powered
sub is turned off (or use the Mono full range RCA output).
I can hear a hum or buzzing noise from my speakers
- Cable TV is the most common source of hum or buzzing noise in a system. If you have a cable TV box
connected to your audio system temporarily remove the incoming cable signal from the Cable TV box. If
the hum goes away the problem is with the cable TV ground. You will need a cable TV ground Loop
Isolator which is an inexpensive device that attaches between your incoming cable and the Cable TV box.
- Light dimmers can cause noise in your audio. Try turning lights that are controlled by dimmers all the way
off. If the hum goes away the problem is electrical noise the dimmers introduce into your home’s AC
power.
- Ground loops are also a common cause of hum and buzzing noise. Finding a ground loop is a process of
elimination. Unplug your source components one at a time. When the hum goes away you’ve identified
the source of the ground loop. You might be able to stop the hum by attaching a wire from the chassis of
the offending component to the chassis or ground screw of your preamplifier.