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Rockford Fosgate  T-2500-1BDCP
Rockford Fosgate  T-2500-1BDCP
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Old 12th April 2013, 03:44 PM   #1
josesony68 is offline josesony68  Spain
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Default Rockford Fosgate T-2500-1BDCP

Hi all,

After several months of absence on here, I return with an amplifier that I bought.

Well, just open it, I found that spark, on the right belongs to the power supply, the MOSFET is shorted, and further research should I get.
I've also found a capacitor, with its welding "suspicious"

Is it the view that there will be something else besides that burned?
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Old 12th April 2013, 03:56 PM   #2
seankane is offline seankane  United States
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Well with my experience with these amps, you will have to change the gate resistors, and you will also have to change the drivers on the pwm board. I have been using the IRFP064N's with 47 ohm gate resistors as a sub for the original parts, or you can use original parts.

Obviously you will want to check the outputs for a shorted one.

Check rail voltage.

Check all regulated voltage throughout the amp.

Check the MJD44's and MJD45's and the LM5110's next to the bd output card.

Check caps and op-amps on the various driver boards.
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Old 12th April 2013, 07:32 PM   #3
josesony68 is offline josesony68  Spain
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Thank you for answering me and help me, Sean, has every reason in the world, there are four short IRFP260N mosfet, but drivers do not give me short, (MJD 44H11, right?), Should I replace them too?

I will try to get the originals, and I'll make the order parts as soon as possible.
Until I reach the parts, I can not connect to the tensions post ....
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Old 12th April 2013, 10:46 PM   #4
Perry Babin is offline Perry Babin  United States
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If I'm not mistaken, there is a risk of damage to the display board in this amp if you plug it in when the capacitors are charged. Allow them to discharge for at least 30 seconds before plugging the display board into the main board.
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Old 13th April 2013, 06:51 AM   #5
josesony68 is offline josesony68  Spain
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Thank you very much for the info, Perry, I did not know that, I'll be careful and I will do as you say.
I'll do the Mouser asked to see if I come in next week ....
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Old 22nd April 2013, 04:46 PM   #6
josesony68 is offline josesony68  Spain
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Well, I've received the parts I ordered.

But now I've found, again, more transistors and diodes in short ... ggrrr,,, (this happens to me for not having a good look around ...)

D2012, D2011, Q2017, Q2016, and Q2018, the latter, marked as 2Q7, can not find your reference true, to ask ... do you know he is, Sean?

Do you think that might be bad also, the LM'S?
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Old 23rd April 2013, 04:35 AM   #7
seankane is offline seankane  United States
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2Q is a MMBT5087, not sure if the 7 is even relevant but you could probably call Rockford and ask customer service and they would tell you the value.
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Old 6th May 2013, 09:54 PM   #8
josesony68 is offline josesony68  Spain
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Well, today I ended up getting my missing parts to come.

Yes, Sean, 2Q is MMBT5087, thanks for clearing that up.

The diodes 2011 and 2012 were not burned.

Made all the checks before connecting, surprisingly, works perfectly!
I never thought it was that easy, I always suspected some LM, or in the worst case circuit protection, but, just as well, I'm happy.

Thanks again, Seankane, and Perry, by the wise counsel, I will always be grateful.
Best regards and see you soon.
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Old 6th May 2013, 09:59 PM   #9
seankane is offline seankane  United States
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Glad you got it going.
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Old 6th May 2013, 10:05 PM   #10
josesony68 is offline josesony68  Spain
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