Massive P3000.1 massive DC offset

amc32 · 16th March 2011, 10:15 AM

Working late on a Massive Audio P3000.1 and cant find the source of the dc offset. Any help would be of help. Thanx

Perry Babin · 16th March 2011, 11:08 AM

How bad is the offset?

amc32 · 16th March 2011, 04:55 PM

one channel is .035mv other channel is 2.34volts

Perry Babin · 16th March 2011, 04:56 PM

What if you connect a speaker to it?

amc32 · 16th March 2011, 05:37 PM

The one channel will operate properly with a load connected.
The other channel with send amp into protection with and/or without audio,once a load is connected.

Perry Babin · 16th March 2011, 05:40 PM

OK. It's common to see 2.5v of DC on the outputs without a load on it. It doesn't generally indicate that there is a problem but if the amp is shutting down, there is likely a problem.

Do you have a scope?

16th March 2011, 10:15 AM	#1
amc32 diyAudio Member Join Date: Mar 2008	Massive P3000.1 massive DC offset Working late on a Massive Audio P3000.1 and cant find the source of the dc offset. Any help would be of help. Thanx __________________ ...............I Hear in color.................

16th March 2011, 11:08 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	How bad is the offset? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

16th March 2011, 04:55 PM	#3
amc32 diyAudio Member Join Date: Mar 2008	one channel is .035mv other channel is 2.34volts __________________ ...............I Hear in color.................

16th March 2011, 04:56 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	What if you connect a speaker to it? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

16th March 2011, 05:37 PM	#5
amc32 diyAudio Member Join Date: Mar 2008	The one channel will operate properly with a load connected. The other channel with send amp into protection with and/or without audio,once a load is connected. __________________ ...............I Hear in color.................


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16th March 2011, 05:40 PM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	OK. It's common to see 2.5v of DC on the outputs without a load on it. It doesn't generally indicate that there is a problem but if the amp is shutting down, there is likely a problem. 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

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