Richard,
nice of you, I appreciate your help, but it's unfortunately a user's manual,
which I have. What I need is the electrical diagram, or wiring diagram or
electrical drawing ( different names on it). Yamaha are helpful with all
kind of old manuals, but drawings...njetsky.
Inge
----- Original Message -----
From: "Stadem, Richard D." <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, November 06, 2006 3:42 PM
Subject: Re: [TN] NTC:is there a audiofil out there?
Inge, check this out. Free downloads.
http://www.usersmanualguide.com/yamaha_audio/av_amplifiers/dsp-a990
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of
[log in to unmask]
Sent: Monday, November 06, 2006 7:58 AM
To: [log in to unmask]
Subject: Re: [TN] NTC:is there a audiofil out there?
Ingemar -
Throw up a posting on
http://groups.google.com/group/sci.electronics.repair. You'll have to
register w/the group in order to post, but there's a good chance someone
there will be able to help you out.
Bruce Tostevin
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge
Sent: Thursday, November 02, 2006 5:26 PM
To: [log in to unmask]
Subject: [TN] NTC:is there a audiofil out there?
Hi all,
just taking a chance, 1,000 TNetters, among all there may be somebody
with a
5 channel amplifier Yamaha DSP A-990. I like my old machine, 6 years
old, a fantastic sound and video processor. Happened to short the
outputs and blew most of the 14 power darlington transistors. I have
repaired with newer equivalents and all e-c-b voltages are OK, but 5
seconds after start, there is a safety relay that switches power off. I
can't figure out why and what the sensors react on. Complicated
electronics. Now I just wonder if someone happen to have such a machine
and if there is also someone who have schematics. Yamaha don't not
respond positively on my request, say they have no service on such a
obsolete amplifier.
Regards
Ingemar Hernefjord
SMW
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