PROTECTION
1. Switch ON Mute Protection
The mute circuit is used at the inputs when the unit switched ON, output of between a few seconds the amplifier will be muted. This is done so that turn-on/ off
noises from mixers and other gear is blocked in case the entire system is powered up at once.
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2. Short Circuit Protection
The UA series comes with built-in Output Short Circuit Protects. The Output Short Circuit Protection protects the output
devices of the amplifier from short circuits and stressful loads. If your speaker lines shorted, the amplifier automatically
detects this problem and discontinued operation for that channel. If one side of your amplifier becomes shorted and goes
into protect mode, the other side will continue to operate normally. Channel output during the “Short Circuit Protection" will
be interrupted (i.e. no sound output). Short Circuit Protection can usually be traced back to the signal output line (i.e.
speaker line). Check the line from the output terminal of the amplifier to the speaker. If this line is good, check the internal
speaker connections and components. A short circuit will usually be traced to a bad cable or a bad speaker component
and is rarely traced to the amplifier itself.
3. Overheating Protection
The UA series amplifiers are cooled by Dual 2-speed fans, and always are kept at moderate temperature. During low level output the fans run at normal
speeds. During high output and as heat raises, (exceeding 50°C.), the fans will run at higher speeds to aid the cooling process. If the heatsink temperature
exceeds 91°C., the amplifier will mute until the amplifier cools down. When the amplifier cools below 90°C., the amplifier will return to normal operations. Be
sure not to operate your amplifier below the minimum load ratings to reduce the risk of overheating problems.
4. DC Circuit Protection
If dangerous subsonic frequencies or direct current (DC) is detected in the amplifier's output, the unit will activate its DC/low-frequency
protection circuitry and the amplifier will be muted.This protects the loads and prevents oscillations. The unit will resume normal operation while
the amplifier no longer detects dangerous low-frequency or DC output.
UNiKA
UA-3000/UA-4000
Introduction Front Panel Rear Panel Set Up Operating Modes
Specifications
Protection
