[wanted] yamaha A-1 service manual / schematic - diyAudio
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Old 27th September 2009, 06:12 PM   #1
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Default [wanted] yamaha A-1 service manual / schematic

hi, a friend of mine is in need of a readable schematic of the yamaha A-1 (old one, not the modern reciever) amplifier

http://www2.yamaha.co.jp/manual/pdf/...h/IntA/A-1.pdf

he has replaced the output transistors, and it works now, but in the driver stage and input section a lot of transistors have been replaced by other types and it runs way too hot compared to the other, still original and correctly working channel.

Last edited by powerflux; 27th September 2009 at 06:26 PM.
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Old 27th September 2009, 08:46 PM   #2
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hifiengine has the service manual here:
http://www.hifiengine.com/manuals/yamaha/a-1.shtml

Free registration required for download....
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Old 27th September 2009, 10:53 PM   #3
jony is offline jony  Poland
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Have you see this
http://ithacaradio.org/a1/
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Old 28th September 2009, 01:10 PM   #4
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Quote:
Originally Posted by jony View Post
Have you see this
http://ithacaradio.org/a1/
looks good, i've sent him the adress and he'll have some results this week
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