brutus 1600w

timwebb · 9th May 2011, 12:38 AM

ok i got this amp had a blown powers supply so i replaced fets gate resistors and drive transistors. the one in there were cracked i replaced them and they are over heating fast.

Perry Babin · 9th May 2011, 12:52 AM

How much current is it drawing?

timwebb · 9th May 2011, 01:32 AM

5 amps. it comes on and idles.

Perry Babin · 9th May 2011, 01:34 AM

Do you have a scope?

timwebb · 9th May 2011, 01:35 AM

yes

Perry Babin · 9th May 2011, 01:45 AM

Clamp the FETs tightly to the sink and check the drive signal at the gates of the power supply FETs. Does the falling edge of the waveform drop straight down to below 2v?

If you're not sure, post photos of the waveforms.

If you get tired of me asking what equipment you have (there's no way for me to remember what equipment everyone has), use your sig file to list the equipment you have (power supplies, meters, scope...).

timwebb · 9th May 2011, 02:24 AM

...

Perry Babin · 9th May 2011, 02:26 AM

Post one of the drive signal on pin 9 of the 7500/494.

timwebb · 9th May 2011, 03:20 AM

there is not a signal there.

Perry Babin · 9th May 2011, 03:27 AM

Pin 10?

Which IC are they using?

9th May 2011, 12:38 AM	#1
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	brutus 1600w ok i got this amp had a blown powers supply so i replaced fets gate resistors and drive transistors. the one in there were cracked i replaced them and they are over heating fast.

9th May 2011, 12:52 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	How much current is it drawing? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

9th May 2011, 01:34 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Do you have a scope? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

9th May 2011, 01:45 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Clamp the FETs tightly to the sink and check the drive signal at the gates of the power supply FETs. Does the falling edge of the waveform drop straight down to below 2v? If you're not sure, post photos of the waveforms. If you get tired of me asking what equipment you have (there's no way for me to remember what equipment everyone has), use your sig file to list the equipment you have (power supplies, meters, scope...). __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

9th May 2011, 02:26 AM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Post one of the drive signal on pin 9 of the 7500/494. __________________ 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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9th May 2011, 01:32 AM	#3
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	5 amps. it comes on and idles.

9th May 2011, 01:35 AM	#5
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	yes

9th May 2011, 03:20 AM	#9
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	there is not a signal there.

9th May 2011, 03:27 AM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Pin 10? Which IC are they using? __________________ 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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