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Audiopipe AP 3000 1D
Audiopipe AP 3000 1D
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Old 24th March 2019, 05:05 PM   #1
caraudioguy2100 is offline caraudioguy2100
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Default Audiopipe AP 3000 1D

Amp has 73 volts on the output terminals .

All of the outputs are new and replaced the drivers as well .

3 banks of drivers have 80 volts of rail on them the fourth bank the drivers only have 12 volts on all of the pins .

Any ideas what might cause this ?
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Old 24th March 2019, 05:14 PM   #2
Perry Babin is offline Perry Babin  United States
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Post a photo of the output section of the amp.
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Old 24th March 2019, 05:34 PM   #3
caraudioguy2100 is offline caraudioguy2100
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Here are some pics let me know if you need more
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File Type: jpg 53C654DC-2A11-47F4-8BF7-42701512DECF.jpg (1.02 MB, 98 views)
File Type: jpg EED68BEC-479B-4475-8C4B-79FAC69BC2B5.jpg (986.4 KB, 93 views)
File Type: jpg 7E790BC7-3759-4509-A218-4134F13EC500.jpg (984.6 KB, 87 views)
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Old 24th March 2019, 05:38 PM   #4
Perry Babin is offline Perry Babin  United States
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What do you mean by 3 banks of drivers? As far as I know, these amps only have one set of drivers for each of the two banks of outputs.
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Old 24th March 2019, 05:43 PM   #5
caraudioguy2100 is offline caraudioguy2100
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There are a total of 4 banks of fets there are 2 boards strapped together like 2 1500 boards strapped together unless I’m wrong .

On 1 of the boards there is 4 outputs on 1 side of the board and 4 outputs in the other side of the board same with the other board

1 set of drivers measures rail voltage the other side the drivers only measure 12 volts on all pins
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Old 24th March 2019, 05:53 PM   #6
Perry Babin is offline Perry Babin  United States
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OK. I've never heard of anyone treating this as one amp.

I'd suggest that you remove the rectifiers from the damaged half to troubleshoot the drive problems. After removing the rectifiers, you can more easily see the drive signals.

Do you have a scope?

Your unused sig line would be a good place to list all of the test equipment you have, including the power supply you use.
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Old 24th March 2019, 06:34 PM   #7
caraudioguy2100 is offline caraudioguy2100
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Does that opto coupler have anything to do with the rail voltage ?

I see a diode that directly connects to the rectifier I get 0.04 ohms between the diode and the rectifier but get no rail voltage on the diode
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Old 24th March 2019, 09:07 PM   #8
Perry Babin is offline Perry Babin  United States
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Are the rectifiers in or out of the circuit?

Everything should have a circuit board designation. You need to specify which components you're referring to via those designations.
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Old 24th March 2019, 10:06 PM   #9
caraudioguy2100 is offline caraudioguy2100
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This amp uses STP65N06 as the power supply fets with 47 ohm gate resistors

I have mixed matched fets in it right now for testing since the originals were shorted .

Can I use the IRF3205ís in his amp as replacements ?

Iím working my way back to the drive problem so wanted to rebuild the power supply
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Old 24th March 2019, 10:26 PM   #10
Perry Babin is offline Perry Babin  United States
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That's what I use (3205s with 47 ohm resistors).

The supply only has to be working at a very basic level to continue troubleshooting the output section.
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