[Adamfarber]

Hi, I have a Yamaha RX-V596 home theater that has all of a sudden started to hum, unit is about 8 years old. . You can hear it in all the speakers, it is coming from the unit itself, anyone know what I can do? Thanks, Adam

[Mark Zacharias[_2_]]

"Adamfarber" wrote in message
...

Hi, I have a Yamaha RX-V596 home theater that has all of a sudden
started to hum, unit is about 8 years old. . You can hear it in all the
speakers, it is coming from the unit itself, anyone know what I can do?
Thanks, Adam




--
Adamfarber


If the Yamaha were actually producing hum, this would indicate most likely a
power supply problem.
Normally the Yamaha's protection circuit would shut it down in this
scenario.

Does the problem with ONLY the speakers and no other devices hooked up?

If not, perhaps a ground loop. This is not uncommon.

If so, maybe a main power supply capacitor open circuit - I'm not sure if
that would trigger the protect circuit.

Mark Z.

[Adamfarber]

Originally Posted by Mark Zacharias[_2_]

"Adamfarber" wrote in message
...

Hi, I have a Yamaha RX-V596 home theater that has all of a sudden
started to hum, unit is about 8 years old. . You can hear it in all the
speakers, it is coming from the unit itself, anyone know what I can do?
Thanks, Adam




--
Adamfarber


If the Yamaha were actually producing hum, this would indicate most likely a
power supply problem.
Normally the Yamaha's protection circuit would shut it down in this
scenario.

Does the problem with ONLY the speakers and no other devices hooked up?

If not, perhaps a ground loop. This is not uncommon.

If so, maybe a main power supply capacitor open circuit - I'm not sure if
that would trigger the protect circuit.

Mark Z.

Hi Mark, I unhooked everything and hooked up a speaker to one of the outputs and listened to FM and I still heard the him. Thanks, Adam

[David Nebenzahl]

On 6/13/2010 12:56 PM Adamfarber spake thus:

Hi Mark, I unhooked everything and hooked up a speaker to one of the
outputs and listened to FM and I still heard the him. Thanks, Adam

The "him"?
Oh, you must mean the "hymn".


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)

[Adamfarber]

[quote=David Nebenzahl;911263]On 6/13/2010 12:56 PM Adamfarber spake thus:

Hi Mark, I unhooked everything and hooked up a speaker to one of the
outputs and listened to FM and I still heard the him. Thanks, Adam

The "him"?
Oh, you must mean the "hymn".


Whoops, meant HUM, thanks, Adam

[Fred[_12_]]

"Adamfarber" wrote in message ...

David Nebenzahl;911263 Wrote:
On 6/13/2010 12:56 PM Adamfarber spake thus:
-
Hi Mark, I unhooked everything and hooked up a speaker to one of the
outputs and listened to FM and I still heard the him. Thanks, Adam-

The "him"?
Oh, you must mean the "hymn".


Whoops, meant HUM, thanks, Adam

Most likely a cap in one of the low voltage supplies has failed, feeding unfiltered
DC to a regulator which cannot maintain smooth output voltage because the input
is going to zero 120 times a second.

You have to be a technician with troubleshooting skills, experience with AV receivers,
test equipment and service information to fix this. Assuming that's not you, the unit
needs to go to a Yamaha warranty station for repair (Yamaha's warranty stations have
access not just to service manuals but also to confidential service bulletins, and more
importantly they have access to the technical staff at Yamaha, which is the only really
competent technical staff in the business). I can call Allen at Yamaha, give him the
model number, and he'll tell me what the problem is and how to fix it because he and his
staff know their equipment that well.

Obviously, I work for a Yamaha warranty station. That's the only company we still do
warranty audio work for, because it's the only one with a staff that knows a damn thing
about their product. Well, them and McIntosh, but there are no Mac dealers around here,
so they don't figure they need a warranty station here (Reno, NV).

Fred

--
Adamfarber

[Mark Zacharias[_2_]]

"Adamfarber" wrote in message
...

'Mark Zacharias[_2_ Wrote:
;911215']"Adamfarber" wrote in
message
...-

Hi, I have a Yamaha RX-V596 home theater that has all of a sudden
started to hum, unit is about 8 years old. . You can hear it in all
the
speakers, it is coming from the unit itself, anyone know what I can
do?
Thanks, Adam




--
Adamfarber-


If the Yamaha were actually producing hum, this would indicate most
likely a
power supply problem.
Normally the Yamaha's protection circuit would shut it down in this
scenario.

Does the problem with ONLY the speakers and no other devices hooked
up?

If not, perhaps a ground loop. This is not uncommon.

If so, maybe a main power supply capacitor open circuit - I'm not sure
if
that would trigger the protect circuit.

Mark Z.

Hi Mark, I unhooked everything and hooked up a speaker to one of the
outputs and listened to FM and I still heard the him. Thanks, Adam




--
Adamfarber


Well, you would need a schematic at this point, which brings up the
question, are you a technical person and able to read the schematic?

Mark Z.