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SX-828 weak right channel

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djez

Active Member
I've got a problem I've tracked down to the tone control board, and specifically I believe it's a bad volume pot. I pulled the jumpers and the amp is fine. On Aux input I get the same .4V on pins 15 (R) & 17 (L) and that also carries to both channels input on the Volume pot. When I track the output of the pot (middle pin) the right is attenuated. I've thoroughly cleaned both sections of the pot. Ideas? Thx
 
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Did you clean the rivets connecting the pot's pins to the phenolic board? I've had those corrode and lose signal. I've actually had success with applying flux, some heat from a solder iron, and dabbing on a bit of solder to secure the connections there.
 
Watthour said:
Did you clean the rivets connecting the pot's pins to the phenolic board? I've had those corrode and lose signal. I've actually had success with applying flux, some heat from a solder iron, and dabbing on a bit of solder to secure the connections there.
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Bingo! I never would have come up with that one. Thanks!
 
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