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Old 26th September 2008, 10:39 AM   #1
diyAudio Member
Join Date: Oct 2006
Default 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
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Old 26th September 2008, 02:29 PM   #2
ppia600 is offline ppia600  United States
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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!
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Old 26th September 2008, 03:58 PM   #3
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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
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Old 26th September 2008, 04:22 PM   #4
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Location: Louisiana
This is what the bad connections look like on the driver transistors on the driver boards.

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Old 27th September 2008, 03:05 AM   #5
Clipped is offline Clipped  Thailand
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try cleaning your rca heads, sometimes they develop a film of grunge on the surface and they can make a crackiling sound.
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Old 29th September 2008, 06:13 AM   #6
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Join Date: Oct 2006
thanks all.....i try this...
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