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Old 3rd March 2012, 10:05 PM   #1
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Default Earthquake PH2000

I got another one of theese in for repair..

Theese amps use the SSP45N20A's for the outputs..

When i opened this amp up someone has IRFP260N's in it for the outputs..

Does anyone know if this is a factory mod or did someone put the totally wrong outputs in it ??
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File Type: jpg Earthquake1.JPG (561.2 KB, 139 views)
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Old 4th March 2012, 06:57 PM   #2
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The solder connections are often a good indication of what's been flow soldered and what's been hand soldered.

You may also be able to see the impression of the TO-220 transistors on the sil pads if they were originally in the amp.
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Old 4th March 2012, 07:42 PM   #3
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I cant tell since the sil pad was not orginal.. And also really couldnt tell if the solder was orginal ..

The guy sid he had someone fix it before..

So i will just put it back to the other outputs..


The orginal outputs are the SSP45N20A's So will the IRF3415's work in this ?
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Old 4th March 2012, 08:46 PM   #4
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I don't know if the 3415s would work. They may work if the rail voltage never exceeds 75v. The IRFP260N is readily available.
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Old 29th April 2012, 06:38 PM   #5
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Ok i replaced the outputs in this amp i put them back to the SSP45N20A's

Also replaced all drivrs for the outputs...


Amp still has 70 volts on output terminals.. Thats measured directly across them..


Any ideas where to look next ?
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Old 30th April 2012, 05:48 AM   #6
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I don't have any information on this amp. I'd need a MUCH better photo to help.

Read the photo section of the basic repair page. The camera that I used there was a very old Nikon. I'm sure that the S3000 can do much better if you take the time to learn to use it.
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Old 30th April 2012, 10:49 PM   #7
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Heres some better pics of the board..
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File Type: jpg Earthquake 1.JPG (576.3 KB, 76 views)
File Type: jpg Earthquake 2.JPG (722.5 KB, 68 views)
File Type: jpg Earthquake.JPG (749.6 KB, 63 views)
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Old 1st May 2012, 07:43 AM   #8
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If Q20 is an MPSA92, remove it. Does that eliminate the DC on the speaker terminals?
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Old 1st May 2012, 09:52 PM   #9
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Removed Q20 still have the 70 volts on speaker terminals
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Old 1st May 2012, 10:17 PM   #10
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If Q22 is connected to the bases of the drivers for the high-side FETs, pull it. Does that eliminate the DC?
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