Logitech Soundman X2 speakers work then don't

[De]

I have a pair of Logitech Soundman X2 speakers which I love!!

And had them for a year or two (not sure)

Anyway yesterday I turned on my PC and no sound at all from them not even
brackground hiss or anything when volume was on full. But the LED turned
from yellow to greena nd it all looked good.

I tried puttin git on my walkman and nothing and new input cable and
nothing.

I moved the cables to check for loose fitting and nothing.

Then this morning I tried agian and it all worked!!

But now 12 hours later I heard a crack fromthe speakers and then no sound at
all - I wasn't playing anything at the time.

Any ideas what the problem might be?

Like some sort of capacitor problem or something, maybe that's why after
leaving it off over night it worked?

All this time the speakers were connected to my UPS so no power surge
problems should have been possible.

I tried again this morning after the speakers stopped working and they'r
working again.
Any ideas what could be wrong?

 

[De]

It is possible that there is a cold solder connection on the circuit
board(s), or at one of the connectors, and or jack. Where the
connectors, and or jacks are soldered down to the circuit board can
sometimes give problems in these. There has been instances where
these parts have become defective internaly and had to be replaced.

Since the manufacture will not sell these parts to outside servicers,
you would have to sub these from a parts supplier, if they have to be
changed.

If you were having a cap problem, it is rare that they go suddenly
defective ass per what you are describing. Usually with electrolytic
caps, the performance deteriates over time, sometimes they become
temperature sensitive, and their defect happens slowely. Ceramic, and
tantilum caps can sometimes go shorted or completely open, but this is
very rare, and almost not at all in these types of units.

It is also possible that a semicoductor or some other type of part is
breaking down, but going by your description, I tend to think it is
what I discribed. If you do require any propriotory parts for your
unit, you will have to send it to them for service, or buy a new one.


Jerry Greenberg
http://www.zoom-one.com

Does cold solder mean the same thing as a dry joint?

i.e. where the solder is sort of hollow on the inside?

I did play the speakers today and they worked and then they stopped after 10
minutes so I tapped the base unit gently and it started again, tapped it
again and ti tstopped and then couldn't get it to work again after that.

I don't think it the acual connections at the back cos I've tries those and
not crackle or anything when they are moved. And plus I never really remove
them and unplug them.

Only thing I can think it to go over the joints with a soldering iron - will
find out tomorrow if it's covered by the Logitech warranty but doubt it -
cos I think the speaker are actually older then I thought.

 

[Arg]

sounds like a dry joint, or broken PCB track, I'd re-solder everything I
could get access to, if you get a chance/inclination.