Inside Squeezebox Radio

[majones]

My Radio was running continuously on external power but one day it died. I checked the power supply on another Radio and it was fine. I suspected that it may be the internal connection to the power input so I inserted a battery, and whoof my Q3 went up in smoke. So I’ve replaced that but it hasn’t got the Radio working again, and I’m wondering what the best sequence of replacement of items should be assuming (per the SB3 C16 and C20 capacitors) that there is a most likely failure mode. Any advice? I can solder capacitors, but that U2 power amplifier looks beyond my capabilities.

[JoeMuc2009]

Hi all,

got another failed Radio here, burnt Q3 and short circuit across the power amplifier outputs. However, it turned out that the short circuit continues to exist even after the power amp chip was desoldered.
The owner told me he was not aware of any battery in the device but the battery (original model) was actually in there. Seems that the battery being in there can trigger the self-destruction out nowhere anytime.
So I would recommend everyone to remove the battery for good and forget about it. Many devices seem to fail the moment the battery is inserted, but it might also happen in a power outage when the circuitry switches from external power supply to battery or back after external power is restored. Every one of these transitions is apparently very dangerous for the entire device.
Things around the battery look like an afterthought. Logitech seems to have implemented this part of the circuitry in a hurry. I can just say, do not use it.

Regards,
Joe

[SlimChances]

Hi all,

got another failed Radio here, burnt Q3 and short circuit across the power amplifier outputs. However, it turned out that the short circuit continues to exist even after the power amp chip was desoldered.
The owner told me he was not aware of any battery in the device but the battery (original model) was actually in there. Seems that the battery being in there can trigger the self-destruction out nowhere anytime.
So I would recommend everyone to remove the battery for good and forget about it. Many devices seem to fail the moment the battery is inserted, but it might also happen in a power outage when the circuitry switches from external power supply to battery or back after external power is restored. Every one of these transitions is apparently very dangerous for the entire device.
Things around the battery look like an afterthought. Logitech seems to have implemented this part of the circuitry in a hurry. I can just say, do not use it.

Regards,
Joe

I have not read the whole thread but your post caught my eye. Will using a battery in the SB Radio pose a fire hazard or is will it just possibly damage the radio? I have used mine on battery and on mains with the battery always inserted for a few years now with no issues. Is this just asking for trouble?

[slartibartfast]

Hi all,

got another failed Radio here, burnt Q3 and short circuit across the power amplifier outputs. However, it turned out that the short circuit continues to exist even after the power amp chip was desoldered.
The owner told me he was not aware of any battery in the device but the battery (original model) was actually in there. Seems that the battery being in there can trigger the self-destruction out nowhere anytime.
So I would recommend everyone to remove the battery for good and forget about it. Many devices seem to fail the moment the battery is inserted, but it might also happen in a power outage when the circuitry switches from external power supply to battery or back after external power is restored. Every one of these transitions is apparently very dangerous for the entire device.
Things around the battery look like an afterthought. Logitech seems to have implemented this part of the circuitry in a hurry. I can just say, do not use it.

Regards,
Joe

They can can fail without battery so this seems a bit over the top.
https://forums.slimdevices.com/showthread.php?p=861151

https://forums.slimdevices.com/showthread.php?p=909389
Sent from my SM-G900F using Tapatalk

[JoeMuc2009]

There's no way of knowing what is going to happen. It's true, the Radio can also fail without ever seeing a battery at all, but from what I read here, most of these incidents involve the battery so that's suspicious.

[habee]

So after it was working for 2 1/2 years my SB Radio died again. It went dead after it was running for several hours, before it was only used for a few minutes a day. Actually I am waiting for a new TPA but already replaced a blown diode (D6) which was short. I´ll keep you updated...

Bye habee

[habee]

Two Resistors (R328 and R316) are also blown. I think these were 10K Resistors, because the other ones around are. But they are so tiny, its hard to solder....