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I have a technics A900 mk2 amp powering two b&W speakers. never had a problem before until i moved the room round and hence the speakers and amp. Now the amp cuts out whenever i turn the volume up past a quarter on the dial. Have tried all combinations of switching the speaker cables round still no joy. Any ideas

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  • Anonymous Apr 27, 2009

    Exactly the same problem here!



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Hi guys, I have the same problem and been going crazy looking for a replacement fan motor. This is the problem. THESE LITTLE FECKER fans have micro chips inside and cost over 80 euro. They fail and there are NO replacements anywhere. I have emailed everyone from Technics to Panasonic to Matsushita, who actually used to make the unit. NO LUCK! Soooo frustrating.
Anybody know how to bypass this?

Posted on Jan 31, 2011

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Look at you fan ;)

Posted on Oct 31, 2010


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Posted on Jan 02, 2017

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SOURCE: i have a technics A900

To confirm the status of the amplifier to be in order you can use an headphone to test . Now connect a valid input and open up beyond the quarter mark the volume to see if there is any cut off.
If there is a problem the amplifer must be checked, First of all check if the input supply voltage in the phase is lower than in the earlier outlet as a low supply can cut off supply on loading.
If this is correct the speakers must be checked separately for the impedance, if there is any short in the speakers wires or in the connection area.
If there is no visible errors seen the amplifier could have acquired some errors while you moved.
Check once again the input: if the source input is connected to the same input or else a higher input can cut off due to load current. Check with a separate input source.
If these test are good , then you must recheck once again the input voltage settings on the amplifier.
Finally check after opening the covers to fix all connectors to be tight.
Since it worked before it was moved it can be some accidental errors . If not a coincidence of an amplifier failure must be checked only if there is distortion in the output.
Check main +B voltage to the power amplifier.

Posted on Oct 27, 2010

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