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Old 22nd December 2011, 07:08 PM   #1
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Default Rockford FOsgate BD1000

Hello everyone just wanted to share my next project.

This one will definantely need some love huh???

I will post my findings and results to help others in aid of repair before starting new posts.
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Old 22nd December 2011, 07:24 PM   #2
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OOPS!!! Posted before pics uploaded here they are!!
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File Type: jpg Rockford BD1000 001.jpg (1,014.7 KB, 66 views)
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Old 22nd December 2011, 07:31 PM   #3
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A few more for good measure.
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File Type: jpg Rockford BD1000 002.jpg (947.2 KB, 68 views)
File Type: jpg Rockford BD1000 003.jpg (979.4 KB, 59 views)
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Old 22nd December 2011, 10:27 PM   #4
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Repairing the same bd right now as well. All supply and output fets gone, waiting on new parts to arrive.

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Old 22nd December 2011, 11:30 PM   #5
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Yeah I got tired of always waiting on parts so I decided to spend alot of money and stock thousands of parts. As many of these as I repair a week it was in my best intrest.

On an average I repair about 20 amps a week mostly Rockford, now that work has slowed down for the winter months I will have more time for repairs.

It has been a profitable hobby. Lets keep in touch on this post I am sure we will have alot of the same issues with our basket cases.
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Old 23rd December 2011, 01:38 AM   #6
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Amp is prepped and ready for new parts.

Here is my list so far.

Protection led light, remote lead, subsonic filter switch, phase switch, rca jacks, 6 power supply capacitors, 8 power supply fets, 8 power supply gate resistors, 2 pnp and 2 npn driver transistors, 6 output fets, 6 output fet gate resistors, 1 MIC4420CT low side mosfet driver, 1 Optocoupler, 1 Op-amp, and we will start with that.

I will get everything replaced and fire up the amp and view the drive circuit and output through the scope.
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Old 23rd December 2011, 03:31 AM   #7
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OK

Replaced 6 power supply caps, 2 pnp and 2 npn drivers for power supply, replaced 8 power supply fets, 8 gate resistors for the power supply fets, remote lead, protection led light, phase switch, subsonic switch, RCA jacks and that is it so far.

I powered up the amp and NOTHING!!! No lights no NOTHING!!!

I cant think of anything I missed, something must be wrong with the turn on circuit??

I am getting voltage at the LM339 just not sure where to look??

What did I miss??
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Old 23rd December 2011, 03:50 AM   #8
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Post the voltage on the SG3526.
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Old 23rd December 2011, 04:03 AM   #9
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pin 1: 0.562 vdc
pin 2: 0.002 vdc
pin 3: 2.056 vdc
pin 4: 0.288 vdc
pin 5: 13.31 vdc
pin 6: 0.001 vdc
pin 7: 0.215 vdc
pin 8: 13.32 vdc
pin 9: 1.946 vdc
pin10: 1.806 vdc
pin11: 0.162 vdc
pin12: 0.655 vdc
pin13: 1.711 vdc
pin14: 0.110 vdc
pin15: 0.001 vdc
pin16: 0.001 vdc
pin17: 0.043 vdc
pin18: 0.669 vdc

I would have to say defective wouldnt you?
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Old 23rd December 2011, 04:10 AM   #10
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Pins 13 and 16 are the output and I see next to no voltage from them so is it safe toassume it is defective?
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