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High Temp Indicator
The High Temp indicator will light red when the any of the six internal heatsinks reach 90
degrees centigrade. If either channel in a channel pair is driven beyond its safe thermal range,
the High Temp indicator will light red and both channel pair numbers in the front panel display
will change from green (normal) to red (fault).
Both channels on a shared heatsink will shut down until the heatsink temperature falls below
90 degrees centigrade, at which time the amplifier channel pair will automatically resume
normal operation. The Z-12 is unlikely to overheat unless it is deprived of adequate
ventilation.
Channel Status Indicators
The display window on the front panel provides complete operational status of each channel
pair (1-2, 3-4, 5-6, etc.) of the Zonemaster Z-12. The following chart shows front panel
indication and the corresponding status of the channel pair.
Channel Pair LED Indication
Corresponding Channel Pair Status
Green illumination
Normal operation
Red illumination
A fault with one or both channels in the channel pair
Temperature overheating
Channel(s) are being overdriven
Load impedance too low or short circuited wires
Blown internal B + or B- fuse(s)
LEDs not illuminated
Remote enable is disabled by the system controller
Maintaining Your Parasound Amplifier
Your Parasound power amplifier requires no periodic maintenance and has no user serviceable
parts inside. To avoid the risk of electric shock, do not remove the top cover. The amplifier’s
exterior can easily be cleaned with a soft cloth moistened only with a few drops of water or
glass cleaner.
Main Power Fuses
There is an external fuse mounted on the rear panel. This fuse protects the unit from possible
damage to internal parts.
Each channel pair has its own B+ and B- fuses that may open when there is a repeated fault
at the speaker output. This could occur when the speaker cable is short-circuited, or the
impedance to that channel is too low.
If you suspect that the B+ or B- fuses may be blown, have qualified service personnel inspect
or replace these fuses since dangerous voltages are present in this amplifier.
Never replace any fuse with a higher value than originally installed. Substitution of larger
fuses may seriously damage internal parts and will void your warranty.
