Amplifier keeps restarting because of power fluctuation

[Venkyrenga]

My Marantz model 40n keeps restarting whenever there is power fluctuation in my house. How do I fix this? Can I get some stabilizer? What kind?

Thanks in advance.

 

[rwnano]

If under warranty get it replaced. Power electronics and power supply bugs is a deal breaker .

 

[mbhangui]

My Marantz model 40n keeps restarting whenever there is power fluctuation in my house. How do I fix this? Can I get some stabilizer? What kind?

Thanks in advance.

What do you mean by power fluctuation. Is it the voltage that increases or decreases?. Have you connected a voltmeter that tells you it is a power fluctuation? Or do you mean "power interruption" where power gets cut off for a fraction of a second to few seconds?

If it is power interruption, avr shutting off is normal. Higher the rated power of AVR, the avr will shut off even if the electriction goes off for a fraction of a second. This is becuase the capacitor bank in the power supply is not sufficient to maintain adequate power for the avr to remain on. This is normal and nothing wrong with your AVR. Best is to live with. You can put an UPS with the rated capacity so that your AVR is always getting power.

 

[Venkyrenga]

What do you mean by power fluctuation. Is it the voltage that increases or decreases?. Have you connected a voltmeter that tells you it is a power fluctuation? Or do you mean "power interruption" where power gets cut off for a fraction of a second to few seconds?

If it is power interruption, avr shutting off is normal. Higher the rated power of AVR, the avr will shut off even if the electriction goes off for a fraction of a second. This is becuase the capacitor bank in the power supply is not sufficient to maintain adequate power for the avr to remain on. This is normal and nothing wrong with your AVR. Best is to live with. You can put an UPS with the rated capacity so that your AVR is always getting power.

It is already connected to an apc ups (600VA / 360W).

 

[mbhangui]

It is already connected to an apc ups (600VA / 360W).

Then you don't know if it is a fault with the UPS or with the AVR.
Connect a small led bulb, table lamp also to the UPS output. If the bulb flickers when the AVR cuts off, then the fault is with the UPS. Else there is a fault with the power supply board of the AVR.

EDIT: also it looks like your UPS rating is less. Your AVR must be more than 360 watts of power that the UPS can deliver. But regardless of that, if you connect a LED bulb to the output, it will flicker if the UPS cuts off power even for a fraction of a second.

 

[Venkyrenga]

Then you don't know if it is a fault with the UPS or with the AVR.
Connect a small led bulb, table lamp also to the UPS output. If the bulb flickers when the AVR cuts off, then the fault is with the UPS. Else there is a fault with the power supply board of the AVR.

EDIT: also it looks like your UPS rating is less. Your AVR must be more than 360 watts of power that the UPS can deliver. But regardless of that, if you connect a LED bulb to the output, it will flicker if the UPS cuts off power even for a fraction of a second.

I actually had the same issue with my previous Marantz pm7000N but after connecting it to the same ups the problem was solved.

Also my current amp's power requirement is 220W.

 

[mbhangui]

Most likely it is power interruption that is happening with your supply to your house. I have such incidents at least once a month, especially in this rainy season. I have around 3-4 UPS in my house. One of my UPS has this problem (cheap chinese desktop UPS (relabled make in india champion ups)). This cheap ups is in my bedroom with a table lamp and a banana pi connected to it. I also have my macbook adaptor connected to it. When the macbook power adaptor is disconnected, my macbook makes a tik-tok sound telling me that the power has been cut. It again makes the same tik-tok sound when the power is regained.

Whenever this fraction of a second power interruption happens, the table lamp flickers and my macbook pro makes the tik-tok sound. My raspberry PI however doesn't shut off. This is because it is connected to a 5v adaptor with a large capacitor which supplies the power when power is lost. Also raspberry PI consumes much lesser power than an AVR, or a laptop. Hence it keeps running unlike my table lamp and laptop. So it is important to know what is happening on your UPS input/output, if it is a power interruption or a voltage spike or a sudden voltage drop.