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Rockford Fosgate Power T2500-1bd
Rockford Fosgate Power T2500-1bd
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Old 11th June 2021, 05:26 PM   #11
RJohns777 is offline RJohns777
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Two square waves at 57.4kHz. Two almost square waves at 115kHz.
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Old 11th June 2021, 05:41 PM   #12
RJohns777 is offline RJohns777
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Two like this.
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File Type: jpg 20210611_123343.jpg (669.3 KB, 25 views)
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Old 11th June 2021, 05:45 PM   #13
RJohns777 is offline RJohns777
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Then two of this.
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File Type: jpg 20210611_123159.jpg (624.7 KB, 24 views)
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Old 11th June 2021, 05:47 PM   #14
RJohns777 is offline RJohns777
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Also these .
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File Type: jpg 20210611_123729.jpg (728.6 KB, 20 views)
File Type: jpg 20210611_123516.jpg (650.4 KB, 20 views)
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Old 11th June 2021, 08:17 PM   #15
Perry Babin is offline Perry Babin  United States
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You don't need to drive a signal into the amp to get a drive signal.

Do you have drive into and out of the audio driver ICs?
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Old 11th June 2021, 09:37 PM   #16
RJohns777 is offline RJohns777
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The pics are with no signal in.


Aren't the audio driver ICs U2000 and U2002. They drive the transformers. I have a nice square wave on pins 2 & 4 of U2000. But nothing on the outputs pin 5 & 7. I have a lessor not as nice square wave on the input pins 2 & 4. But nothing on the output pins 5 & 7. I have 6V on pin 8 muting the outputs. Sorry if this isn't what you were asking.
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Old 11th June 2021, 09:44 PM   #17
RJohns777 is offline RJohns777
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The nice square wave is on the inputs of U2000. The other is on the inputs of U2002.
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File Type: jpg 20210611_163953.jpg (654.6 KB, 20 views)
File Type: jpg 20210611_164023.jpg (705.9 KB, 5 views)
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Old 13th June 2021, 02:28 AM   #18
Perry Babin is offline Perry Babin  United States
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6v on the shutdown terminals should allow the signal to pass. Have you replaced those ICs?
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Old Yesterday, 06:31 PM   #19
RJohns777 is offline RJohns777
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No I haven't Perry. I would think it unusual for both to go bad at the same time. But, stranger things have happened. I will replace them.
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Old Yesterday, 08:39 PM   #20
RJohns777 is offline RJohns777
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Replaced both driver chips and I now have audio. I didn't consider them because I thought they were muted. Thanks Perry. I understand this model better.
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