Aiwa was absorbed by Sony - Wikipedia tells me this - By 2005 Aiwa products remained on sale in only selected territories around the globe. In 2006, Aiwa products were discontinued and no longer sold in the market.
Searches on Google reveal several Sony Service agents in your area - you might contact them to see if they can manage repairs on your equipment. Yellow pages may also be useful to you.
Good Luck...
May 2016
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howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cassette players.