hey, i got these speakers from my dad and they are around 10-15 years old, one speaker is working correctly but second one everytime when i turn it on i need to raise the volume in order to i assume turn on the relay between amp and woofers + tweeters to make it play music, so lets say that i listen usually at 40% volume but i need to raise the volume to 80% to turn them on and now i can go back to 40%, few weeks later i noticed that this column also has less bass and more treble, when i play 80-1000hz frequency at higher volumes sound is disorted/crackling? this does not occur in the fully working column and i think this could be caused by old caps inside the speaker?
there is available online service manual with circuit diagram and parts list for them and yamaha used electrolytic caps for 15v regulator, mix of ceramic and electrolytic caps on the preamp and mix of electrolytic and film caps on the amp and aside of replacing these old electrolytic caps do i need to replace film and ceramic caps as well? if its possible would there be any benefit in using polymer/aluminium polymer caps?
i live in EU and these speakers were imported from US and i need to use step down converter with chinese sounding name that does not sound trustworthy and i was wondering about converting them to 240v, according to yamaha service manual 120v and 240v versions have different fuse, power cord and the transformer, transformer doesnt have taps that i could rewire and i couldnt find any info about it online, at the output of the transfomer there is 600v full bridge rectifier, i saw one disassembly video of EU version and transformer looked identical to one in US version so im wondering if its possible that this transformer supports 240v? is there any way to check that? if no i would just have to buy transformer that has 240v input and outputs the same voltage as the current one right?
there is available online service manual with circuit diagram and parts list for them and yamaha used electrolytic caps for 15v regulator, mix of ceramic and electrolytic caps on the preamp and mix of electrolytic and film caps on the amp and aside of replacing these old electrolytic caps do i need to replace film and ceramic caps as well? if its possible would there be any benefit in using polymer/aluminium polymer caps?
i live in EU and these speakers were imported from US and i need to use step down converter with chinese sounding name that does not sound trustworthy and i was wondering about converting them to 240v, according to yamaha service manual 120v and 240v versions have different fuse, power cord and the transformer, transformer doesnt have taps that i could rewire and i couldnt find any info about it online, at the output of the transfomer there is 600v full bridge rectifier, i saw one disassembly video of EU version and transformer looked identical to one in US version so im wondering if its possible that this transformer supports 240v? is there any way to check that? if no i would just have to buy transformer that has 240v input and outputs the same voltage as the current one right?
10-15 years is not old for electrolytic capacitors, so I would not jump to the conclusion that the problem must lie with them.
I don't recommend replacing all the capacitors as that is an untargeted approach. Wait for trouble shooting guidance from the experts.
P.S. I would put the voltage conversion question aside until the amplifier fault is rectified.