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Old 2nd February 2012, 11:03 AM   #1
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Default PPI PCX-2125

Amplifier powers on but has distorted output when the volume is turned up? Nothing looks discolored or burned on the board. I did wiggle everything on the board and one of the 2 boards that is mounted verticle makes a clicking noise when moved. I checked for bad solder joints and nothing stands out. Any Ideas?
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Old 2nd February 2012, 11:11 AM   #2
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makes a clicking in the output? did you do a continuity check of the mounting connections. you can't always see it
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Old 2nd February 2012, 02:43 PM   #3
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The clicking/pop is coming from the speakers when I wiggle the card.
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Old 2nd February 2012, 03:49 PM   #4
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If you resoldered the connections on the board, check where they connect to the ceramic board.If all is OK there...

With no power applied, measure the resistance for probes A and B in the following image. What do you read?

http://www.bcae1.com/temp/ppidriverb...roverlay01.swf
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Old 3rd February 2012, 12:41 AM   #5
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Board 1 A=100.3 ohms
B=100.6 ohms

Board 2 A=100.4 ohms
B=100.4 ohms
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Old 3rd February 2012, 01:38 AM   #6
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Those are OK. Double-check the connections where the leads are soldered to the ceramic board. You'll have to use a lighted magnifying glass to see if any of the solder connections are cracked.
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