Shivmangal Posted November 11 Share Posted November 11 Dear all I am new to this group recently faced an issue with SPL 120, after 2years with only power plug supply started a noise of dub dub continuously, Pl let me know if any one know the reason or troubleshooting. Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 11 Share Posted November 11 Probably a failing capacitor in the amp. Quote Link to comment Share on other sites More sharing options...
VIET Posted November 30 Share Posted November 30 (edited) On 11/11/2024 at 5:09 PM, Shivmangal said: Dear all I am new to this group recently faced an issue with SPL 120, after 2years with only power plug supply started a noise of dub dub continuously, Pl let me know if any one know the reason or troubleshooting. I had the same issue and had been repaired it myself. It caused by some capacitors which deteriorate their capacity. In my Amp board, 1 cap 330uF/16V reduced to 200uF, 1 cap 22uF/50V reduced to 5uF, 1 cap 22uF/50V reduced to 16uF. I had changed 3 caps to 330uF/25V, 47uF/16V and 22uF/50V. It is working well now. You need a multimeter - VOM (F) to measure capacity of capacitor. You may have to change 2 caps 100uF/25V if they deteriorate under 80% of their capacity. In my board, 2 cap 100uf only reduced to 90uF so they still can be used continuously. Edited December 1 by VIET Quote Link to comment Share on other sites More sharing options...
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