Hi guys, I'm hoping someone can help me with this one.
I'm repairing a Yamaha Natural Sound Control Amp CX-630, it was previously making a horrible DC like cone thumping noise. And after reflowing lots of cold joints especially around Q71/Q72 it came back to life, that is almost.
I've connected it up to a Yamaha AX-400 amp and can hear the music fine but only if the volume on the AX-400 is turned all the way up and the volume on the CX-630 isn't working. Neither are the balance, bass, treble etc, and stranger still when I change the input selection with music playing it doesn't change the music plays on any input selection! The CX-630 goes with a friend's Yamaha model YST-A5.
Any ideas?
I'm repairing a Yamaha Natural Sound Control Amp CX-630, it was previously making a horrible DC like cone thumping noise. And after reflowing lots of cold joints especially around Q71/Q72 it came back to life, that is almost.
I've connected it up to a Yamaha AX-400 amp and can hear the music fine but only if the volume on the AX-400 is turned all the way up and the volume on the CX-630 isn't working. Neither are the balance, bass, treble etc, and stranger still when I change the input selection with music playing it doesn't change the music plays on any input selection! The CX-630 goes with a friend's Yamaha model YST-A5.
Any ideas?
That's just bleed-through that you hear. The inputs are not enabled on.
The micro or input selection circuit is not working right, trace it out.
https://www.hifiengine.com/manual_library/yamaha/cx-630.shtml
The micro or input selection circuit is not working right, trace it out.
https://www.hifiengine.com/manual_library/yamaha/cx-630.shtml
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