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Class D Switching Power Amplifiers and Power D/A conversion

Faulty left channel on Lepai LP2020A+
Faulty left channel on Lepai LP2020A+
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Old 21st July 2012, 06:43 PM   #1
qSnail is offline qSnail
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Default Faulty left channel on Lepai LP2020A+


I recently bought a Lepai lp2020a+ from eBay for building a boombox, but I've ran into a problem. It appears the the left channel is broken/faulty. At first I believed it was not giving any sound at all but then I put my ear close to the speaker and could hear the music very, very faintly. So it seems it's working slightly.

It's not the speaker I use that's broken because it works fine using the right channel on the amp. Funnily enough I bought two of these amps from eBay, although different sellers, and they both have the same problem So anyone got an idea about what might be wrong? I've begun replacing capacitors on one of them according to Modding the Lepai T2020A+ but no luck so far. Chip broken or is it something repairable on the board? I think the solders look fine but I'm no expert.

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Old 22nd July 2012, 12:38 AM   #2
nigelwright7557 is offline nigelwright7557  United Kingdom
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Location: Carlisle, England
Its usually either output transistors and/or the class d IC.
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Old 22nd July 2012, 01:10 AM   #3
iamtheonlystevo is offline iamtheonlystevo
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If both amps are having the same problem, I would check source/cables first.
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