Owner's Manual

Parasound
®
ZoneMaster
™
2 Owner’s Manual Page 12
Front Panel Power Button and Display
Power Button
If the Turn On Options switch is set to the Manual position, pushing the Power button turns the ZoneMaster
2 on. When turned on the ring around the Power button and the 2 channel status indicators will illuminate
green. Pushing the Power button again turns the unit off. If the rear panel Turn On Options switch is
not set to “Manual” the front panel power button will not operate.
Channel Indicators (1 and 2)
The channel numbers on the front panel illuminate according to each channel’s operational status. Both
channel indicators will always illuminate together. When the unit is turned on, both of the channel indicators
will illuminate green.
Ch 1 = Left Ch 2 = Right
Green: Indicates normal operation.
Red: Indicates the protection circuit has suspended operation of both the Left (channel 1) and Right
(channel 2) to protect the unit from an overload or because one or both of their speaker wires are short-
circuited. The indicators might also alternate flashing green and red, depending on the musical content and
volume levels. This also indicates a problem. Both channel number indicators will always illuminate the
same color. Causes for the front panel indicators to illuminate red are:
 The speaker outputs for one or both channels are short-circuited (negative to positive)
either at the amplifier, at the speaker or somewhere along the speaker wire.
 The negative speaker terminals have been combined (L- to R-).
 Too many speakers are connected and the combined impedance is below 2 ohms.
 The unit has overheated. Provide more ventilation or use a fan.
 The AC line voltage has exceeded the maximum allowed (132V when set for 115V or
264V when set for 230v, depending on your region’s mains voltage).
 The amplifier has been damaged.
Checking for Short Circuits on the Speaker Outputs
If your ZoneMaster 2’s front panel indicators are illuminated red or alternate illumination between green and
red this indicates a problem. Your first step is to immediately turn off the amp. The most likely cause will
be a short circuited speaker connection. To check for this type of fault temporarily unplug both of the green
speaker output connecting blocks. Now turn the amp back on and play music. If the front panel lights now
illuminate green then you’ve eliminated the amp as the source of the problem. Please check your speaker
wires and attached speakers for short circuits or impedance below 2 ohms.