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Old 9th February 2013, 06:16 AM   #1
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Default Rockford P1000bd

This amp powers up and is stable. It has regulated and rail voltage.

The rail is not making it to the outputs.

I am suspecting this card. Is the little LED light on this card suppose to be lit when the amp is on and working or is it suppose to be off?

This amp has no DC on output terminals. This amp is not in protect.

This amp has no audio output??
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Last edited by seankane; 9th February 2013 at 06:19 AM.
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Old 9th February 2013, 07:33 AM   #2
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LED? You mean the black thing at the top? That looks like an LDR -an LED and photoresistor in one package. No,it should not light up.
I could be wrong.
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Old 9th February 2013, 08:59 AM   #3
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That's right. It's an LDR and it doesn't produce any visible output.

Do you have rail if you measure between the center legs of the rectifiers?

Are you sure that you don't have any continuity between the center legs of the rectifiers and any of the drains/sources of any of the outputs?
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Old 9th February 2013, 09:43 AM   #4
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I was not talking about the LDR I was refering to the smd LED beside it. It is in the shadow and hard to see.

I will check the measurements again.
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Old 9th February 2013, 09:55 AM   #5
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D291 sure looks like an LED to me.
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Old 9th February 2013, 10:01 AM   #6
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I don't remember that LED ever being lit. I think it may be part of the protection circuit.
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Old 9th February 2013, 10:03 AM   #7
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D291 is an LED.
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Old 9th February 2013, 10:03 AM   #8
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Ok it was not lit when the amp was powered up, thats why I was asking. I just saw it and figured someone would know, and that would help me eliminate problems. The input is not making it to the outputs.

I guess I should re-install the card and test other things?
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Old 9th February 2013, 10:08 AM   #9
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There are 4 large SMD transistors just behind that board. Do they appear to have overheated?

Is the board warped under them?
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Old 9th February 2013, 10:18 AM   #10
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MJD44H11?

Somebody has either replaced them or reflowed the solder on them.

There is alot of solder on their pins.

Not sure if its safe to power up with the bd output board not installed.

Another member told me to replace those and there are usually a couple of LM6172's fried. The LM6172's are on the bd output board. I was thinking to replace them and then re-installing the board and going from there.

What do you think?
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