Poll: Who Has Sound Problems?

[speculatrix]

I have sound problems on my 6000. Made an adaptor for 2.5mm to 3.55 stereo, and only get one channel. The adaptor is definitely OK - buzzed it out.
I have tried different headphones, known working, no joy.

I've read that the 6000's socket senses the connection of a microphone and switches to input, I am wondering if I need to add a resistor as someone suggested.

Hopefully my 6000 is not faulty, 'cos I intend to use it as an in-car mp3, geting an USB external 2.5" hard drive which is 5V only and can then be mounted safely.

[craigtyson]

I have sound problems on my 6000. Made an adaptor for 2.5mm to 3.55 stereo, and only get one channel. The adaptor is definitely OK - buzzed it out.
I have tried different headphones, known working, no joy.

I've read that the 6000's socket senses the connection of a microphone and switches to input, I am wondering if I need to add a resistor as someone suggested.

Hopefully my 6000 is not faulty, 'cos I intend to use it as an in-car mp3, geting an USB external 2.5" hard drive which is 5V only and can then be mounted safely.
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Odd on the 5500 you can use a headphone as a mic.  Its not great but it works I dont think there is any detection involved just happens to have an A-D input on it.

[maslovsky]

Actually the sound problem on (at least) clumshell devices is more serious then you may think. I have the same problem as reported here on my C750 - first the sound was starting to crack, then it disappeared completely. As I was told by my friend who's good at electronics and tried to fix that - the problem is some loose connectors inside the PCB (the motherboard). The only way to fix this is to replace the whole motherboard...

This problem has aready been reported on many clamshell devices...

[bluedevils]

but I wonder has this been remedied with the newer clamshells?  I kind of figured that all the 7x0 and 860s were vulnerable.

[dbowden]

I just replaced the charging fuse in my C760, and while doing so I caused a problem with the sound.  I can sometimes make it work properly by squeezing on the case near the headphone jack.  It sounds like the same issue most of you are experiencing.  

My sound was fine before I opened the case.

I'm in a meeting now, but as soon as I get a chance, I'm going back to the lab and opening the case again.  It's got to be a loose connection/bad solder joint near the headphone connector.  

I'll post my findings assuming I can fix it.

David

[maslovsky]

but I wonder has this been remedied with the newer clamshells?  I kind of figured that all the 7x0 and 860s were vulnerable.
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I think it just takes time for this problem to appear, even on a newer models.

[maslovsky]

I just replaced the charging fuse in my C760, and while doing so I caused a problem with the sound.  I can sometimes make it work properly by squeezing on the case near the headphone jack.  It sounds like the same issue most of you are experiencing. 

Exactly!

My sound was fine before I opened the case.

I'm in a meeting now, but as soon as I get a chance, I'm going back to the lab and opening the case again.  It's got to be a loose connection/bad solder joint near the headphone connector. 

I'll post my findings assuming I can fix it.

David
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You'll be lucky if it's just the loose connector.

[dbowden]

I have good news and bad news.

The good news (for me) is that the sound on my Zaurus is working again.

The bad news is that I didn't find a cause for it.  I put the mainboard under a microscope and checked out the solder joints on the headphone connector, and looked for obvious flaws in the general vicinity of the connector, but I didn't see any problems.

There is a kink in the cable which is connected near there, but all other functionality works, so I'm assuming the kink is not causing any trouble.

I did notice that the screws (2) holding the mainboard to the case do seem to flex the board slightly in the area near the headphone jack if they're screwed in tightly. The screws I'm talking about are right next to the headphone jack, and further away between the thumbwheel and the IR LEDs (I can supply a picture if needed, but they're pretty obvious). I remembered screwing them in fairly tightly when I re-assembled it last night, but took care this time to screw them in with much less force.  They're now just tight enough to keep the mainboard secure in the case, but are not applying much (if any) force to flex the board.  I would never leave a screw this loose on a mechanical assembly, as it would work its way out.  

I suspect my problem was caused by putting the screws nearest the headphone jack in too tightly, which caused the mainboard to flex slightly, and that loosening them fixed it.

I think there are some traces on the board which are marginal, and the flexing was disconnecting one or more of them.

If you're brave enough to pull your clamshell apart and loosen the screws, it might help.

Also, if that is the problem but loosening the screws doesn't help, you might be able to put a very thin shim on the top side of the board (bottom if your Zaurus is face down on the workbench) and flex it slightly back in the other direction.  I'd be very careful doing this though.

Good luck!

David

I just replaced the charging fuse in my C760, and while doing so I caused a problem with the sound.  I can sometimes make it work properly by squeezing on the case near the headphone jack.  It sounds like the same issue most of you are experiencing. 

Exactly!

My sound was fine before I opened the case.

I'm in a meeting now, but as soon as I get a chance, I'm going back to the lab and opening the case again.  It's got to be a loose connection/bad solder joint near the headphone connector. 

I'll post my findings assuming I can fix it.

David
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You'll be lucky if it's just the loose connector.
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[maslovsky]

I think there are some traces on the board which are marginal, and the flexing was disconnecting one or more of them.

That's what I said initialy. And the problem is that this may (or may not) continue to develop...

Also, if that is the problem but loosening the screws doesn't help, you might be able to put a very thin shim on the top side of the board (bottom if your Zaurus is face down on the workbench) and flex it slightly back in the other direction.  I'd be very careful doing this though.

Actualy, I tried that. It helped only for some time...