Joe,
I might point out that the most likely cause for failure of Control
Board U6 is static damage. When handling it (or other static sensitive
devices), follow good ESD practices.
Most modern active devices *are* static sensitive to one extent or
another. An antistatic mat and a wrist strap are a good investment.
For inexpensive antistaric measures, look for a mat a bit bigger than a
computer keyboard size at those places dealing in computer components -
TigerDirect (www.tigerdirect.com) is usually my first place to look, but
there are many more - search on 'antistatic' at the site.
73,
Don W3FPR
MARY HAYS CARNEY wrote:
Don:
Thanks for the quick reply. Indeed the voltage at pin 5 of U6 is as expected
(2.31 for 11.9 v in).
To be sure: the firmware chip is U6, on the control board?? I'll replace that
and see what happens.
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