Alpine HDA-V90 Owners Manual - Page 12
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About Power Indicator Power Indicator Lights up when power is on. Is off when power is off. Indication color Blue Red (blinking) Red Status Amplifier circuit is normal. Operating temperature is high. Amplifier circuit is abnormal. An electrical short has occurred, or supply current is too high. Operating temperature is too high. Power supply voltage is too high. Solution Turn down the volume of the head unit (input signal). Decrease the vehicle's interior temperature to a normal level. The indicator color changes to blue. Turn off the power supply and eliminate the cause. Then turn on the unit and verify that the indicator color has changed to blue. If it remains red, turn off the unit and consult your dealer. Decrease the vehicle's interior temperature to a normal level. The indicator color changes to blue. Use the correct power supply voltage. The indicator color changes to blue. SYST Before m you have Basic Head Front Rear O Subw Front Rear S Subwo * If the co used, y connec 10-EN ALPINE HDA-M80/HDA-F60/HDA-V90 68-44781Z25-A (EN/DE/FR/ES/IT/SE/RU/CS)