Bingturong Posted May 23, 2021 Report Share Posted May 23, 2021 (edited) Heya! Sorry for reviving this thread again but I got a little issue with my SRA-12S. I had serviced it (with the help of this thread actually) with all-new electrolytic caps and diodes and it has been working dutifully for quite some time until I moved countries. However I brought it out of storage and well, one of the channels is humming loudly. I tracked the problem down to one of the PB-300 boards as when I switch the boards the humming also switches channel. The sound is still amplified as I can tell but the humming is at a constant volume. I think it might be, what I think is, the 630v filter on the board because... Yeah... I think the 51k 5W resistor is burnt but I could be wrong, that's why I'm asking for help. If its just the resistor would any metal oxide 51k 5W resistor do or does it specifically have to be a TDO RS5B because I cannot find anywhere to purchase them? And what about wire-wounds or something else to replace the resistor? I would post more pics but I'm hitting the 500kB limit~ Thanks Edited May 23, 2021 by Bingturong Adding reason for not uploading more pictures Quote Link to comment Share on other sites More sharing options...
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