Hi Folks,
Back today, as it went Pop - Happens to the best of us.
Noted the replacement chip had popped again, and on checking discovered another of the five had print break connections on two pins, due maybe to heat, but the fan was working. Replaced the chip again, and within half an hour had popped again - was Green socket output where speaker had a series cap and no extensions to the lead. Guess refund due.
Had sinking feelings, as not exactly a Sony audio fan - Chris.
PS - Think mention that Aiwa made decent repairable Hi-Fi stuff 'till Sony took over and then produced over complicated crap that couldn't be easily repaired.