Ppi d500/1

mike49504 · 14th March 2010, 08:08 PM

I got this amp today for repair. Amp powers up and has rail voltage on the rectifiers.

But no rail voltage on the outputs.

Wondering where to start?

mike49504 · 15th March 2010, 03:39 AM

I did somemore checking but cant figure out why i dont have rail voltage on the outputs i have it on the rectifiers but nothing on outputs wondering where i should check

Perry Babin · 15th March 2010, 03:54 AM

Photo?

mike49504 · 15th March 2010, 04:25 AM

Heres a pic of the board

Perry Babin · 15th March 2010, 04:29 AM

Broken inductor?

Broken connections on the rectifiers?

Did you look for rail voltage on all of the legs of the outputs?

mike49504 · 15th March 2010, 04:38 AM

Ok i do have rail voltage on the outputs just no output

Perry Babin · 15th March 2010, 04:42 AM

Checked pots and switches?

How far have you followed the audio signal through the op-amps?

Do you have rail-rail oscillation on the outputs?

Does the relay engage?

mike49504 · 15th March 2010, 04:59 AM

I guess i should start checking stuff out it has a bad switch on the amp

14th March 2010, 08:08 PM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Ppi d500/1 I got this amp today for repair. Amp powers up and has rail voltage on the rectifiers. But no rail voltage on the outputs. Wondering where to start?

15th March 2010, 03:54 AM	#3
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Photo? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

15th March 2010, 04:29 AM	#5
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Broken inductor? Broken connections on the rectifiers? Did you look for rail voltage on all of the legs of the outputs? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

15th March 2010, 04:42 AM	#7
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Checked pots and switches? How far have you followed the audio signal through the op-amps? Do you have rail-rail oscillation on the outputs? Does the relay engage? __________________ 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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15th March 2010, 03:39 AM	#2
mike49504 diyAudio Member Join Date: Sep 2006	I did somemore checking but cant figure out why i dont have rail voltage on the outputs i have it on the rectifiers but nothing on outputs wondering where i should check

15th March 2010, 04:38 AM	#6
mike49504 diyAudio Member Join Date: Sep 2006	Ok i do have rail voltage on the outputs just no output

15th March 2010, 04:59 AM	#8
mike49504 diyAudio Member Join Date: Sep 2006	I guess i should start checking stuff out it has a bad switch on the amp

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