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That's a 23-cent nylon acorn nut from the hardware store. Couple dabs of silicone and it looks pretty good- the nut is nicely translucent. They come in a limited range of sizes, this #8 fit my Adcom without reaming the panel.
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...but I wonder why the LED needed replacing. Aren't those LEDs supposed to last a lifetime?
The LED was fine, it's a color-changer that indicates standby/on. The plastic bezel had disintegrated and fallen out. Oddly, most of the panel indicators had fallen out on my 2 Adcom 5002's- plastic failed, adhesives failed, etc. Bad day at the glue factory? The circuit board looks fine, built decently.
BTW, these little Adcoms sound GREAT! What a sleeper from around 1998. Very smooth and punchy. Works nicely enough bridged (one of only a few bridgeable Adcoms). If only a single channel is needed, however, I prefer to use just one channel of the stereo amp.
Hi everyone..i am new here and by profession i am a hardware design engineer. What i found is the LED was fine, it's a color-changer that indicates standby/on. The plastic bezel had disintegrated and fallen out. Oddly, most of the panel indicators had fallen out on my 2 Adcom 5002's- plastic failed, adhesives failed, etc. Bad day at the glue factory? The circuit board looks fine, built decently.
Edits: 06/10/16 06/10/16 06/10/16 08/24/18
Blue LED's have a high failure rate.
As far as LED failure rates go.....which isn't much. I have gear and products with over ten for many years with zero failure
ET
I have a pricy, multi-LED desk lamp that's a couple years old and so far eight of the LEDs have died, one by one. I contacted the manufacturer and -- surprise! -- nothing can be done and they don't offer it any more.
LEDs used as indicators arent driven heavily like those in some lighting. Theyll eventually figure things out and properly drive them and all but eliminate failure. You havent had LEDs as indicators on gear fail have you? Of course segments in early alpha numeric displays failed somewhat often but that was usually drivers or cold solders not the display itself.
ET
I had a blue LED failure in a CD player
and my battery charger has a blue LED
not working. I have not had any non
blue LED failures.
Edits: 05/19/16
But have you had your eyes checked? :-)
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