I've Panasonic SA-AK40 and error F61 appears on display. Just this and no work. As I read more pages here at this site about F61 error of other type Panasonic units, I found the solution: to change IC. But if you see for. ex. partstore.com webpage for SA-AK40, unfortunately there are more kind of ICs! Could you help what partnumber should be replaced? Thanx!

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