[time-nuts] fluke.l monitor for Thunderbolt . . . the saga continues
steve65 at suddenlink.net
Wed Jul 6 18:43:07 UTC 2011
About a month ago I sought advice from list members regarding a
dysfunctional fluke.l monitor for my Thunderbolt GPS receiver. Someone
suggested that I contact Bob at fluke.l to see what he would do. I took
that advice and thought some of you would be interested where I am now.
Plus, I need some more advice :-)
Communicating with Bob is a challenge due to my not knowing any Chinese
and Bob having quite limited English language skills. Following a number
of emails back and forth, Bob sent me a replacement microprocessor board.
The layout of the replacement unit differs from the layout of the older
microprocessor board. The lengths are about the same, but the
replacement board is a bit more narrow than the older board. Further,
the microprocessor chip on the replacement board is parallel to the
short dimension of the board whereas that IC is parallel to the long
dimension of the board on the older unit.
Does anyone know if the replacement board with its different layout has
the voltage problem I was seeing with the older board? The older board
has the microprocessor VDD at about 5V. I understand that VDD should be
about 3V and am wondering if the replacement board has corrected that
Is it as simple as removing the older, existing board and soldering the
replacement unit in its place? Any tips as to how to most easily remove
the existing board?
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