20USE- AC Power Switch and LED IndicatorsLED IndicatorsEach Processor has two LED indicators,PWR and SIGNAL. The indicators arelocated on the rear panel of the215PCM.PWR- When the 215PCM is connectedto a properly rated and working ACsupply circuit and is turned on, the bluePWR LED on each of the Processorswill illuminate. When the system ispowered up correctly, two blue PowerLED’s will be visible; one on the TopBox Processor and one on the Sub-woofer processor.SIGNAL- The SIGNAL LED indicatesinput signal presence and strength. It isdual brightness to give an indication ofinput signal strength. The SIGNAL LEDwill illuminate dimly at -40 dB. At -20dB it will light brightly.LED indicators.AC Power SwitchAbove and to the right of the AC entry connector is the Powerswitch. The switch is labeled POWER ON, above it.To turn the power on: Press in on the upper portion of therocker switch. Both DSP-3’s blue Power indicators shouldilluminate after a brief amplifier startup sequene.To turn the power off: Press in on the bottom portion of therocker switch. It may take a few moments for the Power LED’sto extinguish. This is normal.Power switch.