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  1. #1
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    no sound when using battery

    I recently purchased second hand unit of squeezbox.
    Its a UE version and running 7.7.3-r1667

    when my squeezbox radio is connected directly with the power adapter then everything works fine. I get sound and music plays as normal.
    But the strange thing happens when I unplug the power adapter and start using it with battery power then there's no sound, I have checked all settings, and it's not muted, tried full volume. Even booted up with battery, wif connects and everything is normal beside there's no sound coming from the box when using the battery.

    I have been running it on battery for hours and looks to be in good condition.

    Has anyone faced the same issue or have a better solution to the problem?

  2. #2
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    I have never seen this, but I'll take a stab at it, a couple guesses, for what it's worth.

    First, do you get sound out of the headphone jack while on battery?

    Here's what I am wondering (again, a guess). Perhaps the battery is weak. The batteries might measure ok in open circuit, but when they are asked to supply current, they cannot, or, if your do, the voltage drops lower than fresh cells. Maybe it can power the processor, UI, etc (lower current draw) but it cannot supply the audio amplifier in addition (additional current draw) or the audio amp has a "turn on threshold" (voltage) of sorts that is not met because the supply droops.

    My thought is Maybe the low level signal output of the headphone is prior in the signal path.

    Again, I know nothing of the design of the radio, just thinking "what can happen".

    If you have another battery, or are willing to get another one, it would be worth a try. Even if, say you got one from amazon, made no difference, and you returned it.

    Another thought (again, no experience) is if you use an ethernet connection, does this use less power than wifi? Others might know.

    Jim

  3. #3
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    Quote Originally Posted by Redrum View Post
    I have never seen this, but I'll take a stab at it, a couple guesses, for what it's worth.

    First, do you get sound out of the headphone jack while on battery?

    Here's what I am wondering (again, a guess). Perhaps the battery is weak. The batteries might measure ok in open circuit, but when they are asked to supply current, they cannot, or, if your do, the voltage drops lower than fresh cells. Maybe it can power the processor, UI, etc (lower current draw) but it cannot supply the audio amplifier in addition (additional current draw) or the audio amp has a "turn on threshold" (voltage) of sorts that is not met because the supply droops.

    My thought is Maybe the low level signal output of the headphone is prior in the signal path.

    Again, I know nothing of the design of the radio, just thinking "what can happen".

    If you have another battery, or are willing to get another one, it would be worth a try. Even if, say you got one from amazon, made no difference, and you returned it.

    Another thought (again, no experience) is if you use an ethernet connection, does this use less power than wifi? Others might know.

    Jim
    If the battery voltage was low it would turn off and tell you to charge it. I've never seen this either.

    Sent from my Pixel 3a using Tapatalk

  4. #4
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    Quote Originally Posted by slartibartfast View Post
    If the battery voltage was low it would turn off and tell you to charge it. I've never seen this either.

    Sent from my Pixel 3a using Tapatalk
    it was a stab in the dark. I didn't say low, I said weak, as in the internal resistance of the cell or cells is high, causing a limit of the current, or a drop in voltage when current is demanded. My wild guess is if the audio amplifier was starved.

    Of course I don't know of the power management hardware or firmware in the battery, does it detect "weak"?

    I once bought radio used that (on adaptor) powered up, but when you went to play it died (rebooted). I replaced the power supply and it was fine. I surmised the power supply was capable of open circuit voltage, but when current was drawn it failed to deliver.

    my comment on "does it play through headphones" was more a curiosity. If he said yes, I still wouldn't have any more to offer

    Jim

  5. #5
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    You could try to reinstall firmware and then do a factory reset.

  6. #6
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    Quote Originally Posted by Redrum View Post
    I have never seen this, but I'll take a stab at it, a couple guesses, for what it's worth.

    First, do you get sound out of the headphone jack while on battery?

    Here's what I am wondering (again, a guess). Perhaps the battery is weak. The batteries might measure ok in open circuit, but when they are asked to supply current, they cannot, or, if your do, the voltage drops lower than fresh cells. Maybe it can power the processor, UI, etc (lower current draw) but it cannot supply the audio amplifier in addition (additional current draw) or the audio amp has a "turn on threshold" (voltage) of sorts that is not met because the supply droops.

    My thought is Maybe the low level signal output of the headphone is prior in the signal path.

    Again, I know nothing of the design of the radio, just thinking "what can happen".

    If you have another battery, or are willing to get another one, it would be worth a try. Even if, say you got one from amazon, made no difference, and you returned it.

    Another thought (again, no experience) is if you use an ethernet connection, does this use less power than wifi? Others might know.

    Jim
    hello Jim
    thanks for ur great evaluation. I guess u are right with ur points.
    I have checked to run it with battery and sound coming from the headphone jack. So there's nothing wrong with the out-put sound from there. I guess its related to old battery voltage. I'll grab a new battery pack and see if the speaker comes to live again.

  7. #7
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    Quote Originally Posted by M8G View Post
    I'll grab a new battery pack and see if the speaker comes to live again.
    let us know how it goes!

    Jim

  8. #8
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    Quote Originally Posted by Redrum View Post
    let us know how it goes!

    Jim
    ok, i have tried with another battery pack, and it's the same issue. No sound when running the radio from battery power.
    Can it be any faulty switch inside the board or bug in the firmware?

  9. #9
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    Quote Originally Posted by M8G View Post
    ok, i have tried with another battery pack, and it's the same issue. No sound when running the radio from battery power.
    Can it be any faulty switch inside the board or bug in the firmware?
    sorry to hear..just to clarify (and perhaps attract someone with another idea):

    Your UE radio works fine on adaptor. But on battery there is no sound from the speaker, but there IS sound through the headphone jack, correct?

    Again, I don't know the design of the radio, no schematics are available, but anything I might suspect is eliminated because everything works while on line power (e.g. faulty headphone jack switch)

    So, maybe someone else has an idea, but until then, here's a couple things I might try...

    1) If you are running as a UE radio, try switching to a sb radio (firmware) - it's in settings->advanced <somewhere, don't have a UE radio available>..
    2) I assume you did a factory reset.
    3) There is community software for the radio and touch that you could try. It all started as a "bass missing" problem https://forums.slimdevices.com/showt...ss-amp-problem
    and then developed into new firmware https://forums.slimdevices.com/showt...ight=community
    4) In the two threads above, maybe you can look through them and see if there are any similarities. If you see something, maybe quote reply in that thread with your issue.

    I am really sorry I couldn't help more, I'm just a happy sb user, not one of the developers. Maybe we can attract their attention.

    Jim

  10. #10
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    Quote Originally Posted by Redrum View Post
    sorry to hear..just to clarify (and perhaps attract someone with another idea):

    Your UE radio works fine on adaptor. But on battery there is no sound from the speaker, but there IS sound through the headphone jack, correct?

    Again, I don't know the design of the radio, no schematics are available, but anything I might suspect is eliminated because everything works while on line power (e.g. faulty headphone jack switch)

    So, maybe someone else has an idea, but until then, here's a couple things I might try...

    1) If you are running as a UE radio, try switching to a sb radio (firmware) - it's in settings->advanced <somewhere, don't have a UE radio available>..
    2) I assume you did a factory reset.
    3) There is community software for the radio and touch that you could try. It all started as a "bass missing" problem https://forums.slimdevices.com/showt...ss-amp-problem
    and then developed into new firmware https://forums.slimdevices.com/showt...ight=community
    4) In the two threads above, maybe you can look through them and see if there are any similarities. If you see something, maybe quote reply in that thread with your issue.

    I am really sorry I couldn't help more, I'm just a happy sb user, not one of the developers. Maybe we can attract their attention.

    Jim
    yes its correct, no sound on battery.

    I have checked all ur suggested links and tried provker and Alsa amp with no result when using the battery.
    Have also tried to update to 7.8.0 version. Didn't manage to make a firmware update. Do u have better guide? and which files should be used for 7.3.3 version?

    i dont know if someone can explain why i have by-pass connection to my unit? I have connected the battery directly and doesn't make any differences if u by-pass connect or not.
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