Damn SPL Dynamics amp dead after shock!

Custom Chris · 10th May 2011, 09:10 PM

Hello, whilst out in my car today listening to some beats, my sub box fell over and landed on top of my SPL Dynamics S2000D.
When I went in the boot to investigate I found the red protection light was on. I immediately switched off the amp and back on again. The green light was coming on for a few seconds, then a click, into protection. It was like this everytime I tried.

I took the amp apart looking for any visible damage and everything looked intact except for 1 resistor which I resolderd.
Then, like an idiot I tried the amp without the mosfet clamps and ended up burning 6 fets!
Before this happened the amp did not switch on at all...

I can get replacement fets for a few £GBP each but my question is, what would most likely shut down due to the shock?

I have successfully repaired 1 other amp before (I'm a bit of a newbie to all this!)

Any advice welcome - Thanks

Custom Chris · 10th May 2011, 09:26 PM

Just to add.
The voltage was about 14.5v
I removed and ruled out, RCA's, speaker and remote wires.

Like I say, there appeared to be no visible damage...

Perry Babin · 10th May 2011, 10:14 PM

Post a photo of the inside of the amp and indicate which resistor you resoldered.

Custom Chris · 16th May 2011, 03:26 PM

Hi sorry it's taken so long to reply. I was having trouble uploading pictures - which was most frustrating I might add...
Here are the pictures of how the board did look before the problem... (10MiB pictures)

ultra · 16th May 2011, 04:02 PM

I have the schematic of S2000D

If you need it, please post your email address

Custom Chris · 16th May 2011, 04:31 PM

Thank you very much

I'm just uploading some pictures of the amplifier as it is now...
jojonab - at - aol.com
Much appreciated!

ultra · 16th May 2011, 05:15 PM

mail sent

Custom Chris · 16th May 2011, 07:05 PM

Excellent, thank you very much!

This is how the amplifier is at present.

As you can see, due to my neglect, I need to replace 6x IRFP064N mosfets and 2 of these... Not sure of the name but, it's parts Q7 & Q8 on the top right of the PWM board...

Other pictures;

As you can see, the yellow glue at the bottom of one big cap has a crack in it. I will go further into this in a moment...
I will upload a picture of what I soldered now.

Custom Chris · 16th May 2011, 07:31 PM

This is the area I hit with solder. I just thought it looked a little weak so went ahead and reinforced it... it's just the one spot.

Going back to when this first happened and the amp was still in the car. I turned it upside down whilst still on (in protect mode) and when I put my hand near this area, I could feel an electrical charge. I don't know if this helps at all?

ultra · 16th May 2011, 07:32 PM

In my opinion you need to replace ALL 12 IRFPs064 to make a reliable power supply.
Seems the two SOT223 transistors (Q7 and Q8) on the power supply board are the drivers.

In my case, someone got me an identical amp but never came back with the parts of the money for them. So, it is left as is. It was a truly fried amp (got fire inside).
Good luck with yours!

10th May 2011, 09:10 PM	#1
Custom Chris diyAudio Member Join Date: May 2011	Damn SPL Dynamics amp dead after shock! Hello, whilst out in my car today listening to some beats, my sub box fell over and landed on top of my SPL Dynamics S2000D. When I went in the boot to investigate I found the red protection light was on. I immediately switched off the amp and back on again. The green light was coming on for a few seconds, then a click, into protection. It was like this everytime I tried. I took the amp apart looking for any visible damage and everything looked intact except for 1 resistor which I resolderd. Then, like an idiot I tried the amp without the mosfet clamps and ended up burning 6 fets! Before this happened the amp did not switch on at all... I can get replacement fets for a few £GBP each but my question is, what would most likely shut down due to the shock? I have successfully repaired 1 other amp before (I'm a bit of a newbie to all this!) Any advice welcome - Thanks

10th May 2011, 10:14 PM	#3
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Post a photo of the inside of the amp and indicate which resistor you resoldered. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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10th May 2011, 09:26 PM	#2
Custom Chris diyAudio Member Join Date: May 2011	Just to add. The voltage was about 14.5v I removed and ruled out, RCA's, speaker and remote wires. Like I say, there appeared to be no visible damage...

16th May 2011, 03:26 PM	#4
Custom Chris diyAudio Member Join Date: May 2011	Hi sorry it's taken so long to reply. I was having trouble uploading pictures - which was most frustrating I might add... Here are the pictures of how the board did look before the problem... (10MiB pictures)

16th May 2011, 04:02 PM	#5
ultra diyAudio Member Join Date: Jun 2005 Location: Athens	I have the schematic of S2000D If you need it, please post your email address

16th May 2011, 04:31 PM	#6
Custom Chris diyAudio Member Join Date: May 2011	Thank you very much I'm just uploading some pictures of the amplifier as it is now... jojonab - at - aol.com Much appreciated!

16th May 2011, 05:15 PM	#7
ultra diyAudio Member Join Date: Jun 2005 Location: Athens	mail sent

16th May 2011, 07:05 PM	#8
Custom Chris diyAudio Member Join Date: May 2011	Excellent, thank you very much! This is how the amplifier is at present. As you can see, due to my neglect, I need to replace 6x IRFP064N mosfets and 2 of these... Not sure of the name but, it's parts Q7 & Q8 on the top right of the PWM board... Other pictures; As you can see, the yellow glue at the bottom of one big cap has a crack in it. I will go further into this in a moment... I will upload a picture of what I soldered now.

16th May 2011, 07:31 PM	#9
Custom Chris diyAudio Member Join Date: May 2011	This is the area I hit with solder. I just thought it looked a little weak so went ahead and reinforced it... it's just the one spot. Going back to when this first happened and the amp was still in the car. I turned it upside down whilst still on (in protect mode) and when I put my hand near this area, I could feel an electrical charge. I don't know if this helps at all?

16th May 2011, 07:32 PM	#10
ultra diyAudio Member Join Date: Jun 2005 Location: Athens	In my opinion you need to replace ALL 12 IRFPs064 to make a reliable power supply. Seems the two SOT223 transistors (Q7 and Q8) on the power supply board are the drivers. In my case, someone got me an identical amp but never came back with the parts of the money for them. So, it is left as is. It was a truly fried amp (got fire inside). Good luck with yours!

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