Alpine HDP-D90 HDP-D90 Owners Manual - Page 9
Alpine HDP-D90 Manual
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Indicators ① Power and Protection Indicator Within 2 seconds of booting, the indicator light will show red; In the protection state, the indicator light shows red light; When working normally, the indicator light shows blue light; When shutting down, the indicator light is off. ② Hi-Res Signal Indicator When the optical fiber/coaxial input signal is Hi-Res standard signal, the indicator light is always on (red light); When there is no Hi-Res standard signal for analog input and optical/coaxial input signal, the indicator light is off. ③ Internal Amplifier Indicator When the Internal power amplifier is turned on, the indicator light is always on (red light); When the Internal power amplifier is turned off, the indicator light goes out. 7 EN
7 EN