Jim Shorney wrote:
On Mon, 08 Dec 2008 08:11:35 -0800, GrampZ wrote:
Yep, I've had the exact same problem and Garey is right on the money
with a cure. In fact after about 2 years my rig has developed the same
problem and I have to do this again.
I stumbled on the fix myself the first time when recalling my radio
tech friend's cure for many Yaesu FT-101 problems was pulling the boards
and cleaning the contacts with a common eraser.
I've had this problem as well, mostly manifested as an annoying
intermittent with one of the DR7 connections. I think I have finally
resolved it with sparing application of DeOxit to the contacts. Don't
use the spray, I got the applicator bottle with the needle tip.
My "new" R7A had a problem of a little different sort - one of the pins
on the parent board had a small blob of solder right at the very end,
which had slightly deformed the socket contact when the board was
inserted. I suspect this was a very rare occurence, but may be
something to watch for. After I removed the solder from the end of the
pin, I unsoldered the receptacle from the circuit board and was able to
remove the contact from the connector shell and re-form it into shape.
It's working fine now.
One other problem of this nature is the solder on the long pins of the
DR-7. There is quite a bit of stress on these soft-soldered
connections, and they are subject to the solder cracking. This is not
always visible so reflowing these connections is a good preventative
and/or possible repair if temperature or mechanical pressure causes DR-7
misbehavior.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>
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