Question about Marantz Audio & Video Receivers
The problem you are facing is the speaker protection is turning on to prevent the amplifier from damaging your speakers. It will need some service work done to it to prevent it from happening. I suggest you get it attended to sooner than later, as the problem will be caused by dry solder joints that will need to resoldered, or a semicinductor that is failing. If you are a gun with a soldering iron, you could do this yourself. Check about parts of the amp that runs hot, particularly transistors and resistors in the output stages. resolder all output transistors, and any parts that are mounted to a heatsink. Also focus on areas of the PCB that has discoloured. This is often where the problems occur.
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Posted on Jun 02, 2008
SOURCE: my marantz sr19ex amplifier has
I am working on one right now, it has blown output transistors and several upstream transistors and burned resistors as well. This channel of the amp will need a rebuild.
Use a volt meter and, with black lead on the chassis, check the voltages at the 3 conductor connectors going to the board at the rear speaker terminals. These are the outputs coming from the amp and if there is voltage on any of these (unit at idle, no volume), the protection circuit will keep the output from getting to the speakers. High voltage here means blown amp, most likely.
feel free to contact me regarding the repair... www.irebuildmarantz.com
Posted on Nov 08, 2008
SOURCE: The model number is Kenwood
The manual with 'specs' is here. Take them with a grain of salt because it's impossible to produce more audio watts than are consumed electrically (250 total).
Posted on Dec 26, 2010
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