EEVblog 1714 – Presonus Eris Speaker REPAIR (Capacitor Pop Noise)

Classic intermittent “popping” noise from this Presonus Eris 5 studio monitor speaker. Electrolytic Capacitors are suspect number one.

00:00 – Faulty Presonus Eris 5 speaker. Classic “popping” sound.
03:48 – Teardown
07:16 – Testing for popping again
07:36 – Testing for hiss
08:32 – Rectified voltage testing
09:34 – Woah, that’s that?
10:26 – Getting the PCB out
10:55 – A look at the PCB under the microscope
TAD7294:
https://www.st.com/resource/en/datasheet/tda7294.pdf
13:15 – Missing parts
14:39 – Removing the capacitors
16:00 – Measuring the main filter capacitors
17:14 – The Preamp PCB
18:08 – What is the most likely culprit?
20:21 – In-circuit ESR testing
21:32 – All new capacitors
24:15 – Soldering in new caps and testing
25:38 – What did I goof?
27:57 – Conclusion

Forum: https://www.eevblog.com/forum/blog/eevblog-1714-presonos-eris-speaker-repair-(capacitor-pop)/

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