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Thx for the list.

Cleaned the pots but sound still weak on one channel Would the transistors on preamp board would causing the problem?

Thank you for reply. i will try that pot tonight.

Anyone know how does au 9500 actually work after power on? so i can determine the possible error parts. i have changed the relay into omron dc 24v modle, but still the same. i have tried resolder the preamp board. the weak channel now a bit louder now but still weak. Anyone experts...

Hello every sansui fans, my au 9500 has unbalanced channel, here are what i have already done: 1)i recapped the capacitors for the pre amp,driver board,eq board 2) recapped the 4700uf and 1000uf capacitors 3) cleaning the dirt with contact cleaner on the switchs and knobs 4) i plugged...