JBL EON 515XT No Treble

[ca7922303]

3000hz/1v sine is the signal generator setting. Photo shows probe 1 readings @ pin# 3 tda7293.

[x-pro]

I don't need a voltmeter reading, but a sinewave on pin 3 and pin 14 of the TDA7293.

Why is the frequency 5.75 kHz with a 3 kHz input signal?

[x-pro]

The primary task of the oscilloscope is to show the shape of the signal!

[ca7922303]

Let me get back on this tonight. Need to adjust and change a probe that has a broken ground lead. Thanks.

[ca7922303]

TDA7293 pin #3

[ca7922303]

TDA7293 pin #14

[g1]

Is the waveform at pin14 with the tweeter connected? What frequency?
If it's 3Khz with the tweeter connected, you should be hearing that.

[ca7922303]

Is the waveform at pin14 with the tweeter connected? What frequency?
If it's 3Khz with the tweeter connected, you should be hearing that.

It is 3khz, but Tweeter is not connected and volume is at "0" on control panel.

[The Dude]

I'll add and FYI: The crossover point in that speaker is 4Khz, so there will likely be a slight amount of 3Khz getting through, but frankly I'd be using a test tone over 4k in order to properly see it on the high frequency output amp.

[g1]

See if the signal drops out at pin 14 when the tweeter is connected (and that it is still there at pin 3).

[ca7922303]

See if the signal drops out at pin 14 when the tweeter is connected (and that it is still there at pin 3).

Thanks for that. Working out of town till the weekend. Will get to it then. Thanks.

[ca7922303]

See if the signal drops out at pin 14 when the tweeter is connected (and that it is still there at pin 3).

Getting this checking pin #14

[ca7922303]

See if the signal drops out at pin 14 when the tweeter is connected (and that it is still there at pin 3).

And this checking pin #3

[ca7922303]

See if the signal drops out at pin 14 when the tweeter is connected (and that it is still there at pin 3).

And here's the signal: I was able to hear the signal @ 4,000hz with Tweeter connected and volume nearing 12:00.

[g1]

Looks like the frequency showing on the scope is not the same as what the signal generator is putting out.
Does scope say 91.366 Hz, or 91366 khz ?

Scope the signal coming out of your source, get it set up to show a proper sinewave. Then scope the other points with the same time base settings.