Atlas Sound CP400 user service Front Panel Description, Power Switch, Protect LED Indicators

CP400 & CP700 COMMERCIAL POWER AMPLIFIER

Front Panel Description

OWNER'S MANUAL

2

PROTECT	PROTECT
LIMIT	LIMIT
SIGNAL	SIGNAL

CH-1	CH-2		POWER
		Commercial Power Amplifier

3

4

1

Figure 1

1.Power Switch

This rocker switch supplies power to the amplifier. A red LED located above the power switch will illuminate when the amplifier is switched on.

2.Protect LED Indicators

The amplifier features several types of protection circuitry to prevent damage during

power-up or fault conditions. If any of these LEDs illuminate, one of the various protection features is safeguarding the amplifier. The output relays will disconnect the speaker loads when the protection circuitry detects a fault condition.

•Loudspeaker Protection - When power is first applied, the speaker protection relay is open, preventing transients from reaching the loudspeakers. After the internal power supplies have stabilized, the relay will close, connecting the amplifier output to the load. The yellow Protect LEDs will illuminate during this power-up process.

•Thermal Protection - The amplifier protection circuitry monitors itself for excessive internal operating temperatures. In the event this circuitry detects abnormal thermal conditions (blocked cooling fan or high ambient temperatures), the speaker relay will disconnect the speaker load from the amplifier. Once the internal operating temperature drops back to a safe level, the relay will close, reconnecting the speaker load to the amplifier.

•Short Circuit Protection - The yellow Protect LEDs will illuminate should the amplifier detect a short circuit on the attached speaker load or if the load impedance is too low. When this condition is detected, the internal speaker relays will open up, disconnecting the load from the amplifier. The protection circuitry will stay activated until the fault is cleared.

Note: Once the specific fault has been corrected, the power may have to be cycled to reset the protection circuitry.

3.Signal “Status” LED Indicator

The green “Status” LEDs will illuminate once the input signal has reached -26 dBV or higher.

Specifications are subject to change without notice

AtlasSound.com

1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. •		TELEPHONE: (800) 876-3333 •	FAX: (800) 765-3435
©2008 ATLAS SOUND LP	Printed in U.S.A.	ATS002102 RevD 2/08	PP

4