PPi A600 noise

MHFidelity · 26th September 2008, 10:39 AM

Hi, i have some problem with my ppi a600.
i have an noise in the right channel similar pop corn....
help my

ppia600 · 26th September 2008, 02:29 PM

One of the vertical ceramic pre driver boards is probably having issues. Sometimes a transistor can have a cold or fatigues solder joint. There are other guys here with lots of experience on that.

1moreamp · 26th September 2008, 03:58 PM

Don't forget bad electrolytic caps in that list. They are the weakest of all the components in any amp, And your amp is old enough to need them to be replaced. I would start with the power supply caps first, especially the little ones in the lower rails, they are usually beat up very bad by heat build up and change color from Grey to brown even.
I do it everyday to amps this age.

As for the SIP cards they develop bad solder connections and heed to be touched up possibly. Other than that they usually fail outright and crash the amp....Best of luck

Perry Babin · 26th September 2008, 04:22 PM

This is what the bad connections look like on the driver transistors on the driver boards.

http://www.bcae1.com/temp/IMG_7352b.jpg

Clipped · 27th September 2008, 03:05 AM

try cleaning your rca heads, sometimes they develop a film of grunge on the surface and they can make a crackiling sound.

MHFidelity · 29th September 2008, 06:13 AM

thanks all.....i try this...

26th September 2008, 10:39 AM	#1
MHFidelity diyAudio Member Join Date: Oct 2006	PPi A600 noise Hi, i have some problem with my ppi a600. i have an noise in the right channel similar pop corn.... help my

26th September 2008, 02:29 PM	#2
ppia600 diyAudio Member Join Date: Jun 2007 Location: Louis y ana	One of the vertical ceramic pre driver boards is probably having issues. Sometimes a transistor can have a cold or fatigues solder joint. There are other guys here with lots of experience on that. __________________ Don't worry... you can always turn the gain down!

26th September 2008, 04:22 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	This is what the bad connections look like on the driver transistors on the driver boards. http://www.bcae1.com/temp/IMG_7352b.jpg __________________ 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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26th September 2008, 03:58 PM	#3
1moreamp diyAudio Member Join Date: Dec 2005 Location: Northern California	Don't forget bad electrolytic caps in that list. They are the weakest of all the components in any amp, And your amp is old enough to need them to be replaced. I would start with the power supply caps first, especially the little ones in the lower rails, they are usually beat up very bad by heat build up and change color from Grey to brown even. I do it everyday to amps this age. As for the SIP cards they develop bad solder connections and heed to be touched up possibly. Other than that they usually fail outright and crash the amp....Best of luck

27th September 2008, 03:05 AM	#5
Clipped diyAudio Member Join Date: Mar 2005 Location: home	try cleaning your rca heads, sometimes they develop a film of grunge on the surface and they can make a crackiling sound.

29th September 2008, 06:13 AM	#6
MHFidelity diyAudio Member Join Date: Oct 2006	thanks all.....i try this...

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