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Sansui 555a - right channel stops working after some time

H

harobike

New Member
Hello!
I did a full recap of my old Sansui 555a, I replaced also transistors XA495, 8002, 9002 and 2SC281. Everything now sounds great but recently after a longer listening right channel stops working. I was frightened that it had broken, but when I turned off and turned on the amplifier everything was back to normal. This happened several times, after some time right channel stops working. Do you know what that means?
 
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Hi, re the right channel drop out, I have recently had two 555A's with channel drop out caused by the speaker on of switch being intermittent. Try operating the speaker select switch several times once the drop out has occurred and see if it comes back.
 
It's not a switch I guess. When it happened, I changed speaker connection from the system A to the system B and it didn't change anything. Only when I switched Mode from Stereo to Mono something began to happen in the right channel, but it was the music with hum. Only after I turned off and turned on the amplifier everything was good. What it could be?
 
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