My mom has an old ~40 year old audio amplifier LUXMAN L-210, that hasn't been turned on for about a decade.
I found some time the other day and turned it on to see whether it's working and how it's performing.
So it did turn on and seemed to work (I have radio tuner, cassette player and disk player peripherals running as well).
I didn't stress test it or anything.
However soon after, about ~3 minutes after turning it on I noticed a very bad smell.
After about 10 minutes slight smoke was billowing.
So I tracked it down, localized the issue and it was the amplifier.
At first I thought it was a problem with the transformer.
But if that was the problem it wouldn't be running at all right?
At any rate, I opened up the cage and first off I dusted it off, it was a mess.
I plugged it in again and watched as it was operating all alone (no other peripherals attached).
True enough the smell was apparent almost immediately.
I have a laser thermometer and I run it across all the parts (at least every one I could) and noticed the temperature on all of them.
So everything was fine, room temperature, except a single capacitor which was reaching 150 degrees Celsius after 10 minutes of operation and slowly growing!
After leaving it on for about 20 minutes no smoke had come out though and I realized the smoke was due to the huge amount of dust that must have been burning up around the capacitor and as such causing it.
The circuits and components next to it were also at high temperature (highest was ~40 max) but I think this was just the heat buildup from that single capacitor.
You can see what capacitor I'm telling you about in image No1 (amp_luxman_1_.JPG).
It's located around the middle, It's greenish, just above two fuses and to the left of two smaller greenish caps and another huge cap. I made a black mark/dots with a marker on top of it (you can't miss it).
So my question is, can I conclude that this capacitor is the sole problem of this setup?
Would it be enough if I replaced it with another same capacitance capacitor? I have a multimeter that tests capacitance, I could check it out. My soldering skills are rusty but I'll give it a go.
Can you spot other problems or do you suspect something else to be out of place?
Any suggestions and thoughts are welcome.
I found some time the other day and turned it on to see whether it's working and how it's performing.
So it did turn on and seemed to work (I have radio tuner, cassette player and disk player peripherals running as well).
I didn't stress test it or anything.
However soon after, about ~3 minutes after turning it on I noticed a very bad smell.
After about 10 minutes slight smoke was billowing.
So I tracked it down, localized the issue and it was the amplifier.
At first I thought it was a problem with the transformer.
But if that was the problem it wouldn't be running at all right?
At any rate, I opened up the cage and first off I dusted it off, it was a mess.
I plugged it in again and watched as it was operating all alone (no other peripherals attached).
True enough the smell was apparent almost immediately.
I have a laser thermometer and I run it across all the parts (at least every one I could) and noticed the temperature on all of them.
So everything was fine, room temperature, except a single capacitor which was reaching 150 degrees Celsius after 10 minutes of operation and slowly growing!
After leaving it on for about 20 minutes no smoke had come out though and I realized the smoke was due to the huge amount of dust that must have been burning up around the capacitor and as such causing it.
The circuits and components next to it were also at high temperature (highest was ~40 max) but I think this was just the heat buildup from that single capacitor.
You can see what capacitor I'm telling you about in image No1 (amp_luxman_1_.JPG).
It's located around the middle, It's greenish, just above two fuses and to the left of two smaller greenish caps and another huge cap. I made a black mark/dots with a marker on top of it (you can't miss it).
So my question is, can I conclude that this capacitor is the sole problem of this setup?
Would it be enough if I replaced it with another same capacitance capacitor? I have a multimeter that tests capacitance, I could check it out. My soldering skills are rusty but I'll give it a go.
Can you spot other problems or do you suspect something else to be out of place?
Any suggestions and thoughts are welcome.
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