Creative 6.1 DTT2200 Speaker System faulty

[Nélio Abreu]

Nélio R. C. Abreu
Portugal
[email protected]

Hi there,

I have a Creative DTT2200 6.1 Sound system that I have bought a few years ago. It have worked fine up until a few weeks ago. Now during playback, the sound goes up and down sudenly without touching the volume knob. I have checked the main board and power supply, thinking the problem could be located in one of the many electrolitic capacitors that might have been damage (for example liking fluid out or with the top expanded) but no capacitor is damaged. Does any one have a clue what the problem is?

Please post reply in this news or send me email to the above adress.

Thanks a lot.

 

[[email protected]]

Nélio R. C. Abreu
Portugal
[email protected]

Hi there,

I have a Creative DTT2200 6.1 Sound system that I have bought a few yearsago. It have worked fine up until a few weeks ago. Now during playback, the sound goes up and down sudenly without touching the volume knob. I have checked the main board and power supply, thinking the problem could be located in one of the many electrolitic capacitors that might have been damage (for example liking fluid out or with the top expanded) but no capacitor is damaged. Does any one have a clue what the problem is?

Please post reply in this news or send me email to the above adress.

Thanks a lot.

Capacitors can fail without visible damage. But this "sounds" more
like an intermittent and/or aground problem. Try cleaning the controls
and looking hard at any interconnects. You also may have a cold-solder
somewhere. Can you make it happen by tapping the unit from various
angles, or shaking it, or tapping the controls or connections?

Peter Wieck
Wyncote, PA

 

[Nélio Abreu]

This happens without touching the unit. I just turn it on, set the volume to
1/2 level or eaven to 1/4 level, initialy it plays Ok....but after a short
while, the sound goes down, like if I had turn the volume to minimum, it
stays low for a few seconds and then comes up, sometimes to the original
level, and sometimes to maximum (almost). When it starts doing this, it
continues to do without stoping. I don't need to touch it to happen....it
simply happens. If it are the capacitors, which ones ones should be causing
this?

Nélio R. C. Abreu
Portugal
[email protected]

Hi there,

I have a Creative DTT2200 6.1 Sound system that I have bought a few years
ago. It have worked fine up until a few weeks ago. Now during playback,
the sound goes up and down sudenly without touching the volume knob. I
have checked the main board and power supply, thinking the problem could
be located in one of the many electrolitic capacitors that might have been
damage (for example liking fluid out or with the top expanded) but no
capacitor is damaged. Does any one have a clue what the problem is?

Please post reply in this news or send me email to the above adress.

Thanks a lot.

Capacitors can fail without visible damage. But this "sounds" more
like an intermittent and/or aground problem. Try cleaning the controls
and looking hard at any interconnects. You also may have a cold-solder
somewhere. Can you make it happen by tapping the unit from various
angles, or shaking it, or tapping the controls or connections?

Peter Wieck
Wyncote, PA

 

[DaveM]

This happens without touching the unit. I just turn it on, set the volume to
1/2 level or eaven to 1/4 level, initialy it plays Ok....but after a short
while, the sound goes down, like if I had turn the volume to minimum, it stays
low for a few seconds and then comes up, sometimes to the original level, and
sometimes to maximum (almost). When it starts doing this, it continues to do
without stoping. I don't need to touch it to happen....it simply happens. If
it are the capacitors, which ones ones should be causing this?




Capacitors can fail without visible damage. But this "sounds" more
like an intermittent and/or aground problem. Try cleaning the controls
and looking hard at any interconnects. You also may have a cold-solder
somewhere. Can you make it happen by tapping the unit from various
angles, or shaking it, or tapping the controls or connections?

Peter Wieck
Wyncote, PA

You're assuming that the speaker unit is bad. It might not be. Check the audio
cable that connects to your sound card. Might have a broken connection in the
speaker unit or in the plug on the end of the cable. Check the connection at
the output jack on the sound card. Might just be a loose or dirty connection.
Or it might have inadvertently been pulled loose.

--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)

Life is like a roll of toilet paper; the closer to the end, the faster it goes.

 

[Nélio Abreu]

If it was a broken cable, lose connection or durty contacts, it didn't cause
the sound to decrease or increase it's volume, which it's what it happens.
In case of a broken cable or durty connector, there would be interruption of
the sound and possibly scratchs sounds. What happens is this...

Imagine that your are listening to music, let's say with the volume at 1/2
level....
Sudenly, I turn the volume knob fast to 1/4 of the level down, leave it
there for, let's say 1 second and then turn it to 3/4 of level fast.

This is what it's happening but with no one touching the knob or cables.

 

[[email protected]]

If it was a broken cable, lose connection or durty contacts, it didn't cause
the sound to decrease or increase it's volume, which it's what it happens.

Unless it is the circuit from the center-tap or wiper. This has every
aspect of a heat-related defect. You need to do a physical series of
tests then use a freeze-spray to test. But I doubt it is a capacitor.
And even if it is, that too would indicate by the freeze spray.

Heat-defects can be mechanical as well as electronic.

Peter Wieck
Wyncote, PA

 

[DaveM]

If it was a broken cable, lose connection or durty contacts, it didn't cause
the sound to decrease or increase it's volume, which it's what it happens. In
case of a broken cable or durty connector, there would be interruption of the
sound and possibly scratchs sounds. What happens is this...

Imagine that your are listening to music, let's say with the volume at 1/2
level....
Sudenly, I turn the volume knob fast to 1/4 of the level down, leave it there
for, let's say 1 second and then turn it to 3/4 of level fast.

This is what it's happening but with no one touching the knob or cables.

Oh, yes.. I've seen it happen all too often. Broken or loose connections in
wiring and broken solder connections very definitely can cause your symptoms.
Inside the speaker enclosure, vibrations are set up by the sound emanating from
the speakers. This vibration can cause the shaky connection to make or break,
sometimes with a higher than normal resistance, which can cause exactly what
you're experiencing.
Mind you, I'm not saying that is your problem... just saying that you shouldn't
dismiss the idea until you eliminate that as the cause.

--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)

Life is like a roll of toilet paper; the closer to the end, the faster it goes.

 

[Nélio Abreu]

I have rebuild all soldering in the AMPOP's, the large ones with a heatsink,
but the problem remains. I have also rebuild all soldering in the conectors
but with no result.

 

[[email protected]]

I have rebuild all soldering in the AMPOP's, the large ones with a heatsink,
but the problem remains. I have also rebuild all soldering in the conectors
but with no result.







- Show quoted text -

With respect, getting out the clue-stick:

a) have you done the tap-wiggle test?
b) have you done the freeze-spray test?

Please let us know and with detail what you found.

Peter Wieck
Wyncote, PA

 

[Nélio Abreu]

Not yet....first I have to bought the freeze spray

I have rebuild all soldering in the AMPOP's, the large ones with a
heatsink,
but the problem remains. I have also rebuild all soldering in the
conectors
but with no result.









- Show quoted text -

With respect, getting out the clue-stick:

a) have you done the tap-wiggle test?
b) have you done the freeze-spray test?

Please let us know and with detail what you found.

Peter Wieck
Wyncote, PA