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Nakamichi R1 (RS1) schematic needed

I have a mini Nakamichi stereo receiver, marked R1 on the back. From the info I've found, the RS1 is the same. The right channel is acting up. I suspect the 4111 II output IC, But would like to confirm before spending the money and time to replace it. Does anyone happen to have a schematic for this unit? Thanks.

Re: Nakamichi R1 (RS1) schematic needed

I would first resolder all the pins on the output module, even if they look good.