[wanted] yamaha A-1 service manual / schematic

powerflux · 06:26 PM

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replaced the output transistors, and it works now, but in the driver stage and input section a lot of transistors have been replaced by other types and it runs way too hot compared to the other, still original and correctly working channel.

Phostenix · 27th September 2009, 08:46 PM

hifiengine has the service manual here:
http://www.hifiengine.com/manuals/yamaha/a-1.shtml

Free registration required for download....

jony · 27th September 2009, 10:53 PM

Have you see this
http://ithacaradio.org/a1/

powerflux · 28th September 2009, 01:10 PM

Quote:

Originally Posted by jony

Have you see this
http://ithacaradio.org/a1/

looks good, i've sent him the adress and he'll have some results this week

27th September 2009, 06:12 PM	#1
powerflux diyAudio Member Join Date: Apr 2008	[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replaced the output transistors, and it works now, but in the driver stage and input section a lot of transistors have been replaced by other types and it runs way too hot compared to the other, still original and correctly working channel.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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27th September 2009, 08:46 PM	#2
Phostenix diyAudio Member Join Date: Sep 2009 Location: Phoenix, AZ	hifiengine has the service manual here: http://www.hifiengine.com/manuals/yamaha/a-1.shtml Free registration required for download....

27th September 2009, 10:53 PM	#3
jony diyAudio Member Join Date: Jun 2004 Location: wroclaw	Have you see this http://ithacaradio.org/a1/

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