Question about Marantz ZS5300 6-Channel Amplifier

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Marantz PM4000 amp keeps cutting out

My amp works perfectly but when it starts to reach above average volume it cuts out to mute and will only work when i turn it off and on again before cutting again when reaching that same volume. My speakers and CD player both work prefectly when tested with another amp. Is this repairable?

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There is a fairly simple fix to this problem here: http://www.audiotoolers.com/ubbt/ubbthreads.php/topics/5316/Problems_with_Marantz_PM4000_A.html

Posted on Mar 22, 2010

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This is a known problem with the Marantz PM4000 amplifier and is present on certain models only. If you contact Marantz, they will repair this for you free of charge if your amp is affected.

Posted on Jul 05, 2007

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Ref our live chat: The user manual is here; http://www.marantz.com/pdfs/e_pm4001_man.pdf and your nearest service centre is here; Unit 7 Bentinck Court, Bentinck Road UB7 7RQ West Drayton, Middlesex E-mail : info@sstonline.co.uk Hope this helps :)

Posted on Apr 22, 2007

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Posted on Jan 02, 2017

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1 Answer

Pm 7000 marantz cuts out when I turn up the volume. Works well at lower volumes... tried other speakers and no issue? Is there a way to check the receiver itself?


If the device works on other speakers then it is probably working as it should. You need to check if the is an issue with the speakers that cause it to cut out. Make certain they are the right Ohms for the Marantz. Check the connections to them. It could be that a safety device is clicking in to protect them amp due to some overload problem, caused by the speakers themselves. It might even be one speaker that is playing up. Try testing one speaker at a time, by not having the other connected and the balance control only to the one connected.

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Hi Strange problem with Marantz pm7001 When ever I turn the volume upto around 1/3 and 1/2 of the way, the amp cuts out and reset it self down to minimum volume. It seems like the amp ins't enough power...


What's probably happening is that the amplifier is shutting down or cutting back the volume as protection from damage. You may have a partial short in the speaker wiring that is not a problem at lower levels, but at higher ones causes the amp to see too low a load. There may a problem with a speaker or crossover component that is breaking down at higher volumes. Or something in the amp's output stage is unable to handle the load.

Test the system with a known good speaker system and length of wire and see if the trouble continues. If it does, you'll know it's the amplifier that needs to be checked. If the test speakers can reach normal volume, you can start checking the wiring and other speakers for the source of the trouble.

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Mute function on the amp


A couple of questions to try and narrow this down:

1) What is the impedence rating for the speakers?

2) When the unit shuts down, will it recover on its own after a little while or do you need to power cycle it to get it to work again?

3) When the unit shuts down, is it hot?

Possible causes of this behavior:

1) Impedence rating too low causing the amp to work too hard and shutdown.

2) Excessive heat (caused by #1?) will shutdown the unit to prevent damage.

3) Possible intermittant short in the speaker wires somewhere? Loose connection?

A little more investigation will be required to find this. A repair shop would run this unit under load and monitor the outputs for heat and any spikes in the signal that could kick in the protection circuits.

Keep us posted on what you find.

Dan

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Marantz PM 4000 has cut out


May be the problem solved here :
http://www.audiotoolers.com/ubbt/ubbthreads.php/ubb/showflat/Number/5316/page/1#Post5316

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Marantz pm4000 cuts out at middle volume


Checa las bocinas puede que no soporten la potencia del amplificador y por eso se protege.

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