Technics SA-DA10N 5.1 channel 500 Watt Receiver

I like the the looks, the power, quality sound, and the options. Ease of operation is fantastic, What upsets me is after never abusing the system a power transformer goes on it. I get it repaired from an authorized Technics dealer and they had a hard time finding out the problem. About $350.00 later it was fixed for about 4 months and started all over again. Authorized repair shops only give 3 month warranties, so do they really know what their doing? I contacted Technics through their web-sight, which is Panasonic Electronics. They could not answer the problem to myself, but would talk to the Authorized Technision. I came to the conclusion they only know how to sell. The receiver was purchased for over $1000.00, you pay almost $400.00 for a repair, at the same time I have vintage high-end receivers that are still going strong. It's too bad because when it operated like it was suposed to, the sound quality was enjoyable. TECHNICS SA-DA10