Want schematic for Yamaha RX-V995 or similar

J

Jeff Wiseman

Guest
I own a Yamaha RX-V995 A/V receiver and as a curious person I'd
really like to see a schematic for it. It isn't broken and I'm
not servicing it so I don't need (or want to buy) a service
manual. I would just like to see what the schematics look like
and how the engineers put it together (e.g., what does that
speaker impedance switch REALLY do anyway?). Unfortunately, the
only thing I can find is sites wanting to sell the service
manuals and those don't even seem to have the RX-V995 listed for
some reason.

Does anyone have access to such a diagram that they could e-mail
or snail-mail me? Since the circuitry is similar, even an
RX-V795a diagram would be nice. (If I were employed presently, I
would probably just buy a service manual if I could find one but
money is way too tight at present)

Any ideas?

- Jeff
 
The speaker switch affects the power transformer wiring. Don't remember if
it was the primary or secondary side.

Mark Z.

--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.


"Jeff Wiseman" <wisemanja@earthlink.net> wrote in message
news:4003635D.47D611E@earthlink.net...
I own a Yamaha RX-V995 A/V receiver and as a curious person I'd
really like to see a schematic for it. It isn't broken and I'm
not servicing it so I don't need (or want to buy) a service
manual. I would just like to see what the schematics look like
and how the engineers put it together (e.g., what does that
speaker impedance switch REALLY do anyway?). Unfortunately, the
only thing I can find is sites wanting to sell the service
manuals and those don't even seem to have the RX-V995 listed for
some reason.

Does anyone have access to such a diagram that they could e-mail
or snail-mail me? Since the circuitry is similar, even an
RX-V795a diagram would be nice. (If I were employed presently, I
would probably just buy a service manual if I could find one but
money is way too tight at present)

Any ideas?

- Jeff
Click to expand...
 
That's interesting. What would that have to do with varying the
impedance loading of the power amps? If it were to change the
power handling of the supply, why not just leave it on maximum
all the time?

I always thought that it was just overload protection that when
it wasn't needed (i.e., with higher impedance speakers) could be
remove from the circuit to improve sound quality or something.

- Jeff


"Mark D. Zacharias" wrote:
The speaker switch affects the power transformer wiring. Don't remember if
it was the primary or secondary side.

Mark Z.

--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.

"Jeff Wiseman" <wisemanja@earthlink.net> wrote in message
news:4003635D.47D611E@earthlink.net...
I own a Yamaha RX-V995 A/V receiver and as a curious person I'd
really like to see a schematic for it. It isn't broken and I'm
not servicing it so I don't need (or want to buy) a service
manual. I would just like to see what the schematics look like
and how the engineers put it together (e.g., what does that
speaker impedance switch REALLY do anyway?). Unfortunately, the
only thing I can find is sites wanting to sell the service
manuals and those don't even seem to have the RX-V995 listed for
some reason.

Does anyone have access to such a diagram that they could e-mail
or snail-mail me? Since the circuitry is similar, even an
RX-V795a diagram would be nice. (If I were employed presently, I
would probably just buy a service manual if I could find one but
money is way too tight at present)

Any ideas?

- Jeff
Click to expand...
 
It has to do with voltage and resulting power dissipation. At the 4 ohm
setting the voltages are a bit lower, thus the transformer doesn't tend to
heat up as much.

Mark Z.


--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.


"Jeff Wiseman" <wisemanja@earthlink.net> wrote in message
news:400405B5.CCDB8506@earthlink.net...
That's interesting. What would that have to do with varying the
impedance loading of the power amps? If it were to change the
power handling of the supply, why not just leave it on maximum
all the time?

I always thought that it was just overload protection that when
it wasn't needed (i.e., with higher impedance speakers) could be
remove from the circuit to improve sound quality or something.

- Jeff


"Mark D. Zacharias" wrote:

The speaker switch affects the power transformer wiring. Don't remember
if
it was the primary or secondary side.

Mark Z.

--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.

"Jeff Wiseman" <wisemanja@earthlink.net> wrote in message
news:4003635D.47D611E@earthlink.net...
I own a Yamaha RX-V995 A/V receiver and as a curious person I'd
really like to see a schematic for it. It isn't broken and I'm
not servicing it so I don't need (or want to buy) a service
manual. I would just like to see what the schematics look like
and how the engineers put it together (e.g., what does that
speaker impedance switch REALLY do anyway?). Unfortunately, the
only thing I can find is sites wanting to sell the service
manuals and those don't even seem to have the RX-V995 listed for
some reason.

Does anyone have access to such a diagram that they could e-mail
or snail-mail me? Since the circuitry is similar, even an
RX-V795a diagram would be nice. (If I were employed presently, I
would probably just buy a service manual if I could find one but
money is way too tight at present)

Any ideas?

- Jeff
Click to expand...
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top