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I'm about to tackle a Behringer PPA2000BT power supply repair. Of course I can't find a schematic. Leaving it all in tact I do believe its the switchers FGH40N60 that are bad or the 2 820 mf caps. Before I dive in does anyone have an opinion about this unit? The symtom is that the control panel simply flashes AND the on-off switch will not stop it. No voltage at any of the regulators of the collector of the audio amps. (IRFP4227). Thanks
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I found the oscillator IC underneath but it's unreadable. The customer has used it 3-4 years so he's not in love anyway. Putting it back together awaiting word on a new board or schematic from Behringer.
BUT I learned for the 10th time to NOT try to lift SM diodes with only a solder iron. If I do get a schemo I'll have to repair print. Have a great day! -
Originally posted by Enzo
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Do you know what the part number is for the SMPS, or maybe upload a picture of it? I might have one."I took a photo of my ohm meter... It didn't help." Enzo 8/20/22Comment
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The Joker: Yes I have some Quick Chip...but I was in a hurry and thought I could just flip it up to test it. The first one went fine. The 2nd...not so much. I also broke the tiny tab off the 2nd diode.
The Dude: You mean of the entire board? Yes I'll post it tomorrow. It includes the power amp also.Comment
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Oh, never mind then. The one I have is SMPS only."I took a photo of my ohm meter... It didn't help." Enzo 8/20/22Comment
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I replaced my broken diode, ordered/found the caps but still half power power. Ended up ordering a new board from Behringer which was cheap enough. Customer happy and paid.Comment
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One of the issues that I have occasionally run in to with surface mount parts is the pcb glue machine.
If it puts down too much it can be a real bear to break the glue loose before damage occurs to either the component and/ or the pcb.Comment
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