Speaker Stops After Time?

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

Reply to
KenO
Loading thread data ...

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.

Reply to
dave

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

Dan

Reply to
dansabrservices

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.

Reply to
William Sommerwerck

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

Jonesy

Reply to
Allodoxaphobia

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

Reply to
Michael Black

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.

Reply to
Gareth Magennis

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

Reply to
KenO

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.