Solve : Speaker Dying??

1.	Solve : Speaker Dying??
Answer» I'm using an Altec Lansing ATP 3 speaker set. Recently, the speaker starting to make some continual bass like sound, COMING out of the mid-range speakers. It sounds like hearing the firework from far. This happens even without the speakers being connected to the PC, just power up. Sometimes, connected to the PC, there would be no sound coming out from the speakers at all, either for a few brief seconds or can be minutes. What could be wrong with it? Would it be repairable? Thanks. Quote from: Michael on September 03, 2013, 08:48:22 PM I'm using an Altec Lansing ATP 3 speaker set. 3 speaker set means does the speakers require external power? If yes, I would check the AMP circuit inside. Before that, just power on the speakers and with dry hands, try move the 3.5mm stereo pin slowly (that you connect to your PC head phone jack) along with WIRE and check if the firework type noise you are talking about stops for a SECOND when you move the pin/wire. If yes, The Pin or the wire requires to be changed. If no difference, I would then check the amp circuit.Sounds like a short in one of the wires to me... Quote from: PCdoc on September 04, 2013, 07:14:04 AM Before that, just power on the speakers and with dry hands, try move the 3.5mm stereo pin slowly (that you connect to your PC head phone jack) along with wire and check if the firework type noise you are talking about stops for a second when you move the pin/wire. If yes, The Pin or the wire requires to be changed. If no difference, I would then check the amp circuit. What wire? I've tried reinserting the 3.5mm jacks at both ends (CPU & bass unit) multiple times to eliminate the possibility of contact issue. Like I've mentioned, the noise exists even without connecting the 3.5mm jacks at both ends. There are 3 connectors at the bass unit - the input 3.5mm, the PS/2 to the main right speaker, the RCA to the secondary right speaker. I disconnect the 3.5mm, same. Disconnect the RCA, same. Disconnect the PS/2, no sound at all, of course. Quote from: PCdoc on September 04, 2013, 07:14:04 AM If no difference, I would then check the amp circuit. How do I check that?I open up the subwoofer unit to check out the board inside. Did not observe any obvious bad component or bad soldering. Could it be a bad PS/2 connector?Sorry for late reply. Check all components with a volt meter. Also look for blows caps. If you suspect the PS/2 connector, check the continuity of every Pin inside the PS/2 connector. One probe of the multimeter goes on a pin and the other on the other end of the connector wire. Check all Pins if they show continuity. Also check volume control. While the speakers are turned on, move volume control and check if you hear distortion type noise.

Answer»

I'm using an Altec Lansing ATP 3 speaker set.

Recently, the speaker starting to make some continual bass like sound, COMING out of the mid-range speakers.
It sounds like hearing the firework from far.
This happens even without the speakers being connected to the PC, just power up.

Sometimes, connected to the PC, there would be no sound coming out from the speakers at all, either for a few brief seconds or can be minutes.

What could be wrong with it?
Would it be repairable?

Thanks.

Quote from: Michael on September 03, 2013, 08:48:22 PM

I'm using an Altec Lansing ATP 3 speaker set.

3 speaker set means does the speakers require external power? If yes, I would check the AMP circuit inside.
Before that, just power on the speakers and with dry hands, try move the 3.5mm stereo pin slowly (that you connect to your PC head phone jack) along with WIRE and check if the firework type noise you are talking about stops for a SECOND when you move the pin/wire. If yes, The Pin or the wire requires to be changed. If no difference, I would then check the amp circuit.Sounds like a short in one of the wires to me... Quote from: PCdoc on September 04, 2013, 07:14:04 AM

Before that, just power on the speakers and with dry hands, try move the 3.5mm stereo pin slowly (that you connect to your PC head phone jack) along with wire and check if the firework type noise you are talking about stops for a second when you move the pin/wire. If yes, The Pin or the wire requires to be changed. If no difference, I would then check the amp circuit.

What wire?

I've tried reinserting the 3.5mm jacks at both ends (CPU & bass unit) multiple times to eliminate the possibility of contact issue.
Like I've mentioned, the noise exists even without connecting the 3.5mm jacks at both ends.

There are 3 connectors at the bass unit - the input 3.5mm, the PS/2 to the main right speaker, the RCA to the secondary right speaker.
I disconnect the 3.5mm, same.
Disconnect the RCA, same.
Disconnect the PS/2, no sound at all, of course.

Quote from: PCdoc on September 04, 2013, 07:14:04 AM

If no difference, I would then check the amp circuit.

How do I check that?I open up the subwoofer unit to check out the board inside.
Did not observe any obvious bad component or bad soldering.

Could it be a bad PS/2 connector?Sorry for late reply. Check all components with a volt meter. Also look for blows caps. If you suspect the PS/2 connector, check the continuity of every Pin inside the PS/2 connector. One probe of the multimeter goes on a pin and the other on the other end of the connector wire. Check all Pins if they show continuity. Also check volume control. While the speakers are turned on, move volume control and check if you hear distortion type noise.

Solve : Speaker Dying??

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