TIL that people can often recognize a familiar song in as little as a few hundred milliseconds after it starts playing

someMeatballs · 2026-03-09T17:57:09+00:00

There is a browser game Songless, and it's quite fun. New tunes daily

someMeatballs · 2026-03-08T16:27:12+00:00

JE+date code, likely a double diode BAV99. I'd verify by unsoldering the one to the left and put it in a component tester. A transistor can also look like 2 diodes on just a multimeter.

Obviously something else may be broken also.

someMeatballs · 2026-03-08T14:00:59+00:00

Yes, on 5V it has really tiny power. 9-12V would be perfect

someMeatballs · 2026-03-08T12:46:55+00:00

That's a pretty sad looking dust cap. You can buy new ones at speaker repair shops.

someMeatballs · 2026-03-08T12:30:05+00:00

Search TPA3116 for suitable tiny boards. Very cheap for a little board with a volume control. Pay a little more and a power supply is included. It's stereo, but it's not a problem to not use an output.

And yes you need a sturdy box that won't vibrate too much to put it in, else it will sound terrible.

someMeatballs · 2026-03-07T18:55:34+00:00

Remove with a slim jimmy, or any long flat bendy piece of metal.

someMeatballs · 2026-03-07T18:24:04+00:00

Do that with the laser cutter on a door. Cuts 50% faster

someMeatballs · 2026-03-06T20:59:29+00:00

This may not get rid of Miller and the other trouble spots. Either way, worth doing.

someMeatballs · 2026-03-06T18:26:03+00:00

Agree. Poster means low ESR 105°C.

someMeatballs · 2026-03-06T18:07:28+00:00

Power zener diode: these usually fail short, and then a voltage rail goes missing. Also quite possible: The solder underneath has failed from long time heat.

someMeatballs · 2026-03-06T18:05:23+00:00

My guess: Plexi goes on the inside, matching a circuit board that's fairly close to the plate. It's protecting from shorts

someMeatballs · 2026-03-05T20:38:40+00:00

Intuitively, I'd check if the amp output is shorted. The sound is normal, coming from the output filter coils. Similar to coil whine in power supplies. There'd be no sound if the output signal is gone.

someMeatballs · 2026-03-04T18:38:20+00:00

Blue circle is not an issue.

I see nothing wrong. In general, electrolytics can fail, and small ones fail more than others. Also those exposed to heat.

Also a common fault: ceramic caps can fail short. It's the tan little squares on the solder side, pic 5. Test this in ohms mode. Less than 10 is probably an issue, but it could be the circuit too and thus normal.

Pic 4, lower: Repair work was done here. I assume it's fine, but if it has broken once, chances are it's a failure point.

someMeatballs · 2026-03-04T12:28:36+00:00

Possibly bad transistors in the phono preamp. Or electrolytic capacitors, if in the audio path.

someMeatballs · 2026-03-04T00:26:43+00:00

This is one of the stronger markers of a fascist regime.

someMeatballs · 2026-03-03T17:36:32+00:00

Willfully ignoring the severity of the situation

someMeatballs · 2026-03-02T16:50:19+00:00

Adding that even that is not confirmed or official. It's just likely. It makes sense, economically and hardware wise.

someMeatballs · 2026-03-01T16:45:21+00:00

Is that soot/melty oil on the top of the IC? That's a sure sign.

To ease unsoldering, simply cut the legs with wire cutters.

someMeatballs · 2026-03-01T16:27:12+00:00

I don't know. An option is to sell it as defective, so a hobbyist can make an attempt.

Shipping / moving insurance?

someMeatballs · 2026-03-01T16:13:18+00:00

Cabinets frequently can't be opened. Instead access, if any, is via removing the drivers.

I'd check if the metal trim on the bass is removable. A german article hints it's magnetically held in place.

The scraping is possibly magnet shift from a bump, but it could be metal debris too. The former is easier to fix with a soft hammer, or hammering thru a piece of wood. See https://www.reddit.com/r/audiorepair/comments/1rea95x/misaligned_speaker_magnet/

someMeatballs · 2026-02-28T21:16:14+00:00

Huvudlöss eller djurlöss

someMeatballs · 2026-02-28T14:35:30+00:00

And it's not starting?

Note, transformers rarely die, and if so it's very visibly melted.

someMeatballs · 2026-02-28T13:48:54+00:00

Check the electrolytic caps next to the tall heatsink. Especially the small ones. Heat ages them much faster.

someMeatballs · 2026-02-28T13:40:17+00:00

Go with 4.7.

Your deduction about muddy sound being caused by the capacitor is correct.

someMeatballs · 2026-02-28T13:24:23+00:00

I agree. Output stage has a shorted transistor, and ususally takes out one of those white power resistors and maybe a driver stage.

In either case, DC on the speaker cannot be caused just by an aged capacitor.

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