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Author Topic: Crosstalk problem solved  (Read 564 times)

rsanto

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Crosstalk problem solved
« on: April 29, 2013, 06:37:47 AM »

For some time, I'd been having a crosstalk issue with the C4 pad on my ZX.  Raising the noise floor helped, but I didn't like the decrease in sensitivity.  Plugged it into ZenEdit and tried to tweak the trigger with Rob Anderson's help, but no difference.  I recently noticed that the pad was a little wobbly and wouldn't tighten up just by pressing it down, so I yanked on it from the inside and snugged it up.  Also applied a little bit of glue to hold it in.  When I examined the piezo under the cap, the wire attached to the center popped off.  I re-soldered it, reassembled and tried it out.  All OK now.  My problem was either a cold solder joint or a loose pad (or both!).  Both were easy fixes. 
Reminder: If you have the internal battery modification and your Zendrum goes dead, even when hard-wired through the battery box, check the wire connections to the battery holder! 
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