Ashly ne1600.70 Panduan Pengoperasian - Halaman 5

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Operating Manual - NE Two Channel Power Amplifiers

Protection

This amplifier come standard with several protection circuits:

Over Current Protection - Is controlled in the output stage.

Thermal Protection - The amplifier senses output device temperature and adjusts a two-speed fan to keep the operating

temperature within acceptable limits. If device temperatures exceed that limit, the input to that channel is first reduced, and as

a last resort the power supply will be switched off while the fan continues to run.

Mains Protections – protection within the power supply includes: Inrush Current Limitation during power up, Mains

Over Voltage Detection, and internal Mains Fuse Protection. To protect the Mains fuse against AC overcurrent due to excessive

audio output current, there is a protection scheme controlled in software and indicated on the amplifier front panel which reduces

audio output level until the overcurrent condition is no longer present.

Physical Description

Each model in the NE two channel series is 2RU, and weighs 22 pounds (10kg) or less. The model number is indicated

in the lower left corner of the front panel.

Amplifier Front Panel

1. Mounting Holes – For rack mounting.

2. Power Switch – Switches the unit on or off. Note: The power switch can be disabled from software.

3. Status LEDs – Indicate status of: Power, Standby, Protect, Power Switch Disable, and Com (Ethernet activity).

4. Air Vents – Cool air enters the sides and is blown out the front.

6. Signal LEDs – The lowest LED will begin to light when the output voltage reaches -18dBu below rated output. The

Clip LEDs will begin to flash when output voltage is 1/2 Volt below the output power supply voltage.

7. Bridge – This LED indicates that the two channels are selected to BRIDGE mode from the back panel switch, and that

only channel 1 level control is active.

8. Temp and Current LEDs – The Temp LED indicates that the amplifier has reached an excessively high operating

temperature. The Current LED confirms that the amplifier output is delivered to a speaker load.

9. Channel Attenuators – These control the input signal level to the amplifier section, and can be disabled from software.

10. Factory Reset – To reset internal configurations back to their original factory settings, including all device presets

and user passwords, press and hold this recessed front panel tact switch during power up until all channel LEDs are lit. Upon

reset completion, the LEDs will turn off and the amp will be in normal operating mode.