Home Crown User Forum Crown Amplifiers

DCi4|300 amp with flashing power LED.

The manual says a flashing power LED is caused by the AC voltage out of tolerance. Not the case here. When the power supply goes bad in the DCi series amps the most common symptom is flashing power LED. Someone out there knows what to fix. Every DCi power supply on ebay has the same problem and is being sold for parts. The standby voltages are ok at; 15v, 8v, and 3.3v .
Pushing the power button I can see the "low" signal at the microcontroller pin but it wont power up. Grounding the "sleep" pin shuts off the power LED. I think the microcontroller is ok it just needs something! Both "sense" voltages appear to be ok straight off the AC line. A tech at Crown Audio said to hold down the power button then apply the ac power and continue to hold the power button in for 35 seconds. This should reset the microcontroller. No results.
No schematics or service manuals for the DCi series amps.
Any ideas?


  • raulcgalavizraulcgalaviz Posts: 2
    I have the same problem, my amp bought in Mexico, and I need solve this problem
  • AstronomerAstronomer Posts: 2

    Junked it. These amps have CPU controlled Switching Mode Power Supplies. There's no getting around the problem. Mine had a dead CPU chip.

Sign In or Register to comment.