Speaker Stops After Time?

[KenO]

The left channel of my Magnavox AZ9340 Portable Mini System stops working after I use it for certain amount of time (also have noticed that the time until it cuts out is getting shorter).

If I turn the system off for a few hours the left channel will work when it is turned on again.

At first thought it could be the amp or power switch but after switching speakers determined it was the left speaker.

Have never tested/repaired an audio speaker, appreciate any tips or suggestions.

Thanks

Ken

 

It's a component overheating. Expose the circuit and touch each

component with a cool Qtip that has been dipped in alcohol (not

dripping, just evaporating). The overheating component should reveal

itself. Remove and replace.

I doubt that replacing the heated component will cure the problem. You would best find out why the component is getting hot in the first place. A defective speaker can cause this by providing too low an impedence load on that side of the amp. Try swapping the two speakers first. If the problem now occurs on the opposite side, the problem is the speaker not the receiver..

Dan

 

[dave]

On 06/09/2014 07:42 AM, KenO wrote:

The left channel of my Magnavox AZ9340 Portable Mini System stops working after I use it for certain amount of time (also have noticed that the time until it cuts out is getting shorter).

If I turn the system off for a few hours the left channel will work when it is turned on again.

At first thought it could be the amp or power switch but after switching speakers determined it was the left speaker.

Have never tested/repaired an audio speaker, appreciate any tips or suggestions.

Thanks

Ken

It's a component overheating. Expose the circuit and touch each
component with a cool Qtip that has been dipped in alcohol (not
dripping, just evaporating). The overheating component should reveal
itself. Remove and replace.

 

[William Sommerwerck]

At first thought it could be the amp or power switch, but
after switching speakers determined it was the left speaker.

To those who didn't bother to check the user manual... This unit uses passive
speakers that connect to the main unit with clips. So...

The problem is either with the speaker driver itself, or with the wire
connecting it to the main unit. The latter is more likely. The next time this
occurs, try wiggling/twisting the wire, to see what happens.

 

[Allodoxaphobia]

On Mon, 9 Jun 2014 07:42:08 -0700 (PDT), KenO wrote:

The left channel of my Magnavox AZ9340 Portable Mini System stops
working ...
... after switching speakers determined it was the left speaker.

Well, what is it -- the left *channel* or the left *speaker* ?

Jonesy

 

[Michael Black]

On Mon, 9 Jun 2014, Allodoxaphobia wrote:

On Mon, 9 Jun 2014 07:42:08 -0700 (PDT), KenO wrote:
The left channel of my Magnavox AZ9340 Portable Mini System stops
working ...
... after switching speakers determined it was the left speaker.

Well, what is it -- the left *channel* or the left *speaker* ?

Jonesy

Since he said he swapped speakers, it would seem to be the speaker (or
wiring), not the amplifier channel. But sometimes things get lost in
translation.

The subject header made me wonder. If the amplifier's protection circuit
wsa kicking in, that would cause loss of sound. The time I found a stereo
receiver in a snowbank (and carefully rinsed it out and dried it), there
was recurring problem with the amplifier stopping, I never pursued it but
assumed it was about protective circuitry kicking in, and was likely why
the receiver was tossed in the first place.

That said, if the speaker is bad in the wrong way, that's likely to cause
protective circuitry to kick in.

Michael

 

[Gareth Magennis]

"dave" wrote in message
news:06OdnVQVO9XbVgjOnZ2dnUVZ_jWdnZ2d@earthlink.com...

On 06/09/2014 07:42 AM, KenO wrote:

The left channel of my Magnavox AZ9340 Portable Mini System stops working
after I use it for certain amount of time (also have noticed that the time
until it cuts out is getting shorter).

If I turn the system off for a few hours the left channel will work when
it is turned on again.

At first thought it could be the amp or power switch but after switching
speakers determined it was the left speaker.

Have never tested/repaired an audio speaker, appreciate any tips or
suggestions.

Thanks

Ken

It's a component overheating. Expose the circuit and touch each
component with a cool Qtip that has been dipped in alcohol (not
dripping, just evaporating). The overheating component should reveal
itself. Remove and replace.






A passive speaker does not contain a component.

The OP is asking how to repair a broken speaker.




Gareth.

 

[KenO]

Everyone,

Have been away from the forum until recently.

Read your suggestions and did some tests.

Checked the wire and it was OK.

Since posting was able to get a "similar speaker" and connected it to the left channel. It has been connected for a number of hours with No Problems.

Also used headphones with the system No Problems.

Looks like I will have to take the Original Left Speaker apart.

Thanks again for your help!

Ken