Kevin,
That is "telling" that you have not truly flush trimmed the lead on the
encoder board and the area of the control board where it makes potential
contact. There is not a lot of space for error there.
Flush trimmed means really flush with the board thickness. Solder that
protrudes from the board surface is too much.
you may do well by putting an insulating substance such as a layer of
electrical tape over the encoder board after flush trimming it.
73,
Don W3FPR
On 9/28/2014 10:14 PM, Kevin Schache wrote:
Many thanks to Don and others who responded.
The problem has been fixed, I found a suspect dry joint on the PTT/ATT
switch.
I also checked the new encoder which appeared ok but I did insert a
very thin piece of insulation between the new encoder and the control
board to make sure.
All tests now appear ok UNTIL I re-insert and tighten the two holding
screws in the Control Board. When these are tightened, the control
board is pulled about 1/8th inch toward front panel, probably
stressing both boards, causing the display to be erratic (ELICRAFT
instead of ELECRAFT for example), and erratic other test results.
Stressing the boards may be causing movement in sockets where they are
used.
Does it matter if I leave those two screws out?
Another option would be to put in longer screws and not tighten them
so much, or perhaps a better suggestion maybe to increase the spacer
length marginally, so that there is no stressing.
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