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Old 3rd June 2007, 03:15 PM   #1
jlake1 is offline jlake1  United States
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Default PPI PC6600.2 Help

I have a Precison Power Power Class 6600.2 that suddenly stopped working. When the head unit tries to turn the amp on, something shorts out and actually trips the circuit breaker in my truck for the head unit.

I've pulled the amp, and removed the back service panel, but I can't find anything obvious (busted cap, burned trace, etc.) that would explain the problem. Have any of you had a similar situation? If possible, I'd like to fix the amp. It's the silver series, the last one they made before being bought out.

Your suggestions?

Thanks,
Jay
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Old 3rd June 2007, 03:37 PM   #2
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Chances are you have 1 or more shorted output transistors.

The output transistors are the ones located nearest the RCA jacks. Dependig on the amp they may be 2n6488 / 2n6491
or 2SA1302 / 2SC11**

Do you have a Volt/Ohm meter?
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Old 4th June 2007, 06:15 AM   #3
jlake1 is offline jlake1  United States
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The RCA jacks are on a separate board that plugs into the main one. I didn't find those numbers on that board. The only chips that are on that board have the following numbers:
HM918BF/LM837N

Yes, I have a volt/ohm meter.

Thanks,
Jay
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Old 4th June 2007, 11:20 AM   #4
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They are not going to be on the rca board. They are mounted to the heat sink, generally on the end of the amp that the rca's are on.
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