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22nd June 2009, 12:49 AM
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#1 |
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diyAudio Member
Join Date: Jul 2008
Location: Montreal
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power acoustic 620-2
i am tryiing to fix 2 of these identical amps at the same time, i hope to save money on shipping when i order parts. they have completely different symptoms
this one can actually make sound. the problem is that it is very scratchy. i need to have the level turned almost off for it to make sound and as soon as i raise the level the test speaker goes crazy. nothing seems to be getting really hot and i cant see any burnt parts. i measured the op amps and one leg is reading 26v i figure this is probably a good place to start |
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22nd June 2009, 05:38 AM
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#2 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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What's the resistance from the RCA input shield to the non-bridging speaker terminals?
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Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
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22nd June 2009, 06:07 AM
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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You may have an open trace or a broken ground on the RCA jack. Check both. Compare it to your other one but I think it should read 0 ohms.
__________________
Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
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