My Sony receiver stopped working a few months ago. In the middle of
playing a CD, it shut off. I could turn it back on a few minutes later,
and eventually it stopped outputting sound altogether. (I opened it up
to find that 2 fuses near the transformer that were placed in front of
2 large capacitors had blown. Replacing them and turning the unit on
caused them to blow again.)There was a huge backorder to get it
repaired so recently I broke down and bought a new one. The day after I
plugged in all of my speakers and components the new receiver started
experiencing problems. Listening to a CD again, the display and the
sound shut off. (The receiver was actually still ON, just not doing
anything.) I could turn it off, then on again. Sound would be ok,
display ok, but a few minutes later (even without a load) it would shut
off. Receiver is definately now internally damaged.

I snooped around further looking for the problem and had found that in
one of my large front speakers that house a 12", a 6" and a 2" the
internal cables that attached to the woofer were completely
disconnected. Just lying in the bottom of the speaker box. I know that
this can cause problems if they touch, but how likely is it that this
really is the BIG problem, the demise of both of these receivers?

Can damage this serious take place because 2 internal cables touched?
Or should I still be looking for a bigger problem?

Thank you
--
Mike

In article .com,
"Mike" wrote:

My Sony receiver stopped working a few months ago. In the middle of
playing a CD, it shut off. I could turn it back on a few minutes later,
and eventually it stopped outputting sound altogether. (I opened it up
to find that 2 fuses near the transformer that were placed in front of
2 large capacitors had blown. Replacing them and turning the unit on
caused them to blow again.)There was a huge backorder to get it
repaired so recently I broke down and bought a new one. The day after I
plugged in all of my speakers and components the new receiver started
experiencing problems. Listening to a CD again, the display and the
sound shut off. (The receiver was actually still ON, just not doing
anything.) I could turn it off, then on again. Sound would be ok,
display ok, but a few minutes later (even without a load) it would shut
off. Receiver is definately now internally damaged.

I snooped around further looking for the problem and had found that in
one of my large front speakers that house a 12", a 6" and a 2" the
internal cables that attached to the woofer were completely
disconnected. Just lying in the bottom of the speaker box. I know that
this can cause problems if they touch, but how likely is it that this
really is the BIG problem, the demise of both of these receivers?

Can damage this serious take place because 2 internal cables touched?
Or should I still be looking for a bigger problem?

Thank you
--
Mike

Inductive loads, like a low pass filter leading to a short, can be very
destructive. They store power to act as current regulators. Say the
short raises the current to 15 Amps and the receiver's protection
circuit cuts the drive power. The inductor's stored power will cause
the 15 Amps to continue briefly regardless of the voltage needed to
accomplish that. It's likely to burn something out.

That inductive kick is how 40KV is produced in automotive ignition coils
and TV flyback transformers with only a 1:150 transformer ratio. The
primary winding voltage kicks up to 300+ volts in an attempt to maintain
current flow when the supply power is suddenly cut.

In article .com,
"Mike" wrote:

My Sony receiver stopped working a few months ago. In the middle of
playing a CD, it shut off. I could turn it back on a few minutes later,
and eventually it stopped outputting sound altogether. (I opened it up
to find that 2 fuses near the transformer that were placed in front of
2 large capacitors had blown. Replacing them and turning the unit on
caused them to blow again.)There was a huge backorder to get it
repaired so recently I broke down and bought a new one. The day after I
plugged in all of my speakers and components the new receiver started
experiencing problems. Listening to a CD again, the display and the
sound shut off. (The receiver was actually still ON, just not doing
anything.) I could turn it off, then on again. Sound would be ok,
display ok, but a few minutes later (even without a load) it would shut
off. Receiver is definately now internally damaged.

I snooped around further looking for the problem and had found that in
one of my large front speakers that house a 12", a 6" and a 2" the
internal cables that attached to the woofer were completely
disconnected. Just lying in the bottom of the speaker box. I know that
this can cause problems if they touch, but how likely is it that this
really is the BIG problem, the demise of both of these receivers?

Can damage this serious take place because 2 internal cables touched?
Or should I still be looking for a bigger problem?

Thank you
--
Mike


Passive crossovers are usually wired with either an inductor or a
capacitor between the + and - of the input. One should always keep
speakers connected to passive crossovers.

To answer the amp question, it may or may not have caused your troubles.
I've seen amps live through it.

--
Cyrus

*coughcasaucedoprodigynetcough*

"Cyrus" wrote in message
...
In article .com,
"Mike" wrote:

My Sony receiver stopped working a few months ago. In the middle of
playing a CD, it shut off. I could turn it back on a few minutes later,
and eventually it stopped outputting sound altogether. (I opened it up
to find that 2 fuses near the transformer that were placed in front of
2 large capacitors had blown. Replacing them and turning the unit on
caused them to blow again.)There was a huge backorder to get it
repaired so recently I broke down and bought a new one. The day after I
plugged in all of my speakers and components the new receiver started
experiencing problems. Listening to a CD again, the display and the
sound shut off. (The receiver was actually still ON, just not doing
anything.) I could turn it off, then on again. Sound would be ok,
display ok, but a few minutes later (even without a load) it would shut
off. Receiver is definately now internally damaged.

I snooped around further looking for the problem and had found that in
one of my large front speakers that house a 12", a 6" and a 2" the
internal cables that attached to the woofer were completely
disconnected. Just lying in the bottom of the speaker box. I know that
this can cause problems if they touch, but how likely is it that this
really is the BIG problem, the demise of both of these receivers?

Can damage this serious take place because 2 internal cables touched?
Or should I still be looking for a bigger problem?

Thank you
--
Mike


Passive crossovers are usually wired with either an inductor or a
capacitor between the + and - of the input. One should always keep
speakers connected to passive crossovers.

To answer the amp question, it may or may not have caused your troubles.
I've seen amps live through it.

--
Cyrus

*coughcasaucedoprodigynetcough*

Given it is a Sony product, it is not likely to live through much. I USED to
have many Sony products...
John

In article ,
"JohnR66" wrote:

"Cyrus" wrote in message
...
In article .com,
"Mike" wrote:

My Sony receiver stopped working a few months ago. In the middle of
playing a CD, it shut off. I could turn it back on a few minutes later,
and eventually it stopped outputting sound altogether. (I opened it up
to find that 2 fuses near the transformer that were placed in front of
2 large capacitors had blown. Replacing them and turning the unit on
caused them to blow again.)There was a huge backorder to get it
repaired so recently I broke down and bought a new one. The day after I
plugged in all of my speakers and components the new receiver started
experiencing problems. Listening to a CD again, the display and the
sound shut off. (The receiver was actually still ON, just not doing
anything.) I could turn it off, then on again. Sound would be ok,
display ok, but a few minutes later (even without a load) it would shut
off. Receiver is definately now internally damaged.

I snooped around further looking for the problem and had found that in
one of my large front speakers that house a 12", a 6" and a 2" the
internal cables that attached to the woofer were completely
disconnected. Just lying in the bottom of the speaker box. I know that
this can cause problems if they touch, but how likely is it that this
really is the BIG problem, the demise of both of these receivers?

Can damage this serious take place because 2 internal cables touched?
Or should I still be looking for a bigger problem?

Thank you
--
Mike


Passive crossovers are usually wired with either an inductor or a
capacitor between the + and - of the input. One should always keep
speakers connected to passive crossovers.

To answer the amp question, it may or may not have caused your troubles.
I've seen amps live through it.

--
Cyrus

*coughcasaucedoprodigynetcough*

Given it is a Sony product, it is not likely to live through much. I USED to
have many Sony products...
John

I missed that part. Sony is the best technology coupled to the worst
quality. I haven't seen a Sony product last for more than 3 years since
the Trinitron TVs of the late 80s. Their products are tempting but I've
quit buying them because they fall apart, break solder connections, or
burn out. It's very possible that the speaker was not shorted at all.