ironborn65 Posted April 4 Report Share Posted April 4 Hi all, I am proud (and sad) owner of a SE/30. When I collected it from the seller it was running just fine. When at home I removed the MB to inspect the caps. They looked just fine. I turned it on, and ... no sound, not a single rustle or hush noise the speaker cable is well connected to the two pins did the caps (which one?) passed away just at that moment? did the sound IC passed away just at that moment, lucky me I'm pessimistic by nature, so I thought I did a short circuit with some tiny piece of metal when I laid it down on the table, ... I know, do not spank, please, be kind Before wildly replacing the caps I'd like to know if someone experienced something like this and if a single cap in a SE/30 can mute it Quote Link to post Share on other sites
Juror22 Posted April 4 Report Share Posted April 4 I think that your decision to replace the caps has already been made for you, but you may be able to delay it a bit by washing the motherboard to remove the cap residue that has leaked. Congrats on the SE/30 - I had one once that I thought was going to be the exception to needing caps, and it ran for years without issues, but eventually it succumbed, they all do. Quote Link to post Share on other sites
ironborn65 Posted April 4 Author Report Share Posted April 4 Ready to go .... Axial capacitors are very stiff to be removed ... need to wait 24h to dry it well! I used an air compressor to get all the H2O out from below to CPU and IC in general, and the PSD as well Finger cross Quote Link to post Share on other sites
ironborn65 Posted April 4 Author Report Share Posted April 4 anyhow ... never judge the health of capacitors from the outside, and never be lazy .... I'm telling myself for the next time. Under all the SMD I found corrosion, while the axial one tested OK, 1,2%loss 0.3 ESR and 10% below uF, but I replaced them all (two). Quote Link to post Share on other sites
bibilit Posted April 4 Report Share Posted April 4 Those capacitors have already been replaced. The capacitor related to sound is the 0,1 uf 50 volts. Quote Link to post Share on other sites
ironborn65 Posted April 4 Author Report Share Posted April 4 @bibilit, sure, by me, just now ready to go ... I meant ... ready to turn it on Quote Link to post Share on other sites
ironborn65 Posted April 5 Author Report Share Posted April 5 ta taaa, I have the sound! This thread can be closed now. The story says: never judge the health of capacitors from the outside, and never be lazy, just replace them all and start from there thanks folks Quote Link to post Share on other sites
68kMLA Supporter ScutBoy Posted April 5 68kMLA Supporter Report Share Posted April 5 On 4/5/2021 at 7:43 AM, ironborn65 said: The story says: never judge the health of capacitors from the outside, and never be lazy, just replace them all and start from there Good words to live by in this hobby! Quote Link to post Share on other sites
68kMLA Supporter joshc Posted April 5 68kMLA Supporter Report Share Posted April 5 On 4/5/2021 at 1:43 PM, ironborn65 said: The story says: never judge the health of capacitors from the outside, and never be lazy, just replace them all and start from there Yup, I don't usually bother testing systems before a recap anymore, it's just easiest to recap and then start from there. Quote Link to post Share on other sites
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