Precision Power PC6600.2 Amp turns on then immediately turns off. Need help!

autolink · 12th March 2009, 02:03 PM

Hi I got a used Precision Power PC6600.2 Amp that turns on then immediately turns off. I opened to check if there were any visible damages but I am unable to find any. Can anyone direct to what I should check first? Thanks in advance.

Perry Babin · 12th March 2009, 08:57 PM

Do not operate the amp without the cover in place.

Have you checked the output transistors to see if any are shorted?

The outputs are the ones with their 3rd legs connected to the large resistors. You should not read anything near 0 ohms between any of the legs of any individual transistor.

autolink · 13th March 2009, 12:42 AM

How do I test it? I can't seem to find it. Sorry.

Perry Babin · 13th March 2009, 01:20 AM

I should have asked this before...
Did you confirm that the amp had sufficient voltage at the B+ and remote terminals and a good ground?

If the power supply feeding the amp is OK, read through the basic repair page below. It will make troubleshooting the amp much easier.

autolink · 15th March 2009, 02:12 AM

Yes I currently have an amp installed, but it does not work when I use the PPI amp.

12th March 2009, 02:03 PM	#1
autolink diyAudio Member Join Date: Mar 2009	Precision Power PC6600.2 Amp turns on then immediately turns off. Need help! Hi I got a used Precision Power PC6600.2 Amp that turns on then immediately turns off. I opened to check if there were any visible damages but I am unable to find any. Can anyone direct to what I should check first? Thanks in advance.

12th March 2009, 08:57 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Do not operate the amp without the cover in place. Have you checked the output transistors to see if any are shorted? The outputs are the ones with their 3rd legs connected to the large resistors. You should not read anything near 0 ohms between any of the legs of any individual transistor. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

13th March 2009, 01:20 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I should have asked this before... Did you confirm that the amp had sufficient voltage at the B+ and remote terminals and a good ground? If the power supply feeding the amp is OK, read through the basic repair page below. It will make troubleshooting the amp much easier. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

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13th March 2009, 12:42 AM	#3
autolink diyAudio Member Join Date: Mar 2009	How do I test it? I can't seem to find it. Sorry.

15th March 2009, 02:12 AM	#5
autolink diyAudio Member Join Date: Mar 2009	Yes I currently have an amp installed, but it does not work when I use the PPI amp.

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