The manual is correct about the possibility for ESD harm to the display.
However, by following simple ESD practices, there is no risk.
At the very least, work on a conductive and grounded surface.
Before you touch any part of the display, touch the radio chassis first, EVERY
TIME you will touch the display.
If possible, get an ESD wrist band and clip the wire from it to the radio
chassis.
Do not lay the display on highly insulating or highly conductive surfaces. I
use ESD bags as work surfaces. These are commonly available.
Two very common failures in Ten Tec displays (among other boards) are marginal
soldering and oxidized/dirty board connects. Sometimes just unplugging and
plugging is not a sufficient action to clean them so a little no-residue
contact cleaner sprayed into the female connectors followed by immediate
replugging can help.
As for the soldering issues, a microscope is helpful in seeking out solder
joints that look questionable, removing solder from them and resoldering them
(using an ESD rated soldering tool).
While one might have thought that, since the thing h as worked this long
without issues, why would you look for bad solder joints. The reason is that
you may have flexed the display board whilst removing it and that would bring
out nay marginal soldering failures.
Gary
W0DVN
> On Apr 12, 2019, at 11:29 AM, Rich H <rhattaway@hotmail.com> wrote:
>
> Dale,
>
> I am no expert on the Corsair, but the readout looks very similar to mine in
> an Omni D. I have had mine out on the table two times, working on PTO
> issues.. It's on top of the PTO and must come out. I did not find it to be
> fragile, beyond normal handling care. YMMV, but in my shop it'd not be a
> problem to look around in there at least. If it will run with the case off,
> I think I'd leave it that way and probe around a bit with a small wood dowel
> when the malady occurs. I'd also mess with the VFO plug while the unit is
> live and exhibiting issues...
>
> Dick
> W4PID
>
>
> Date: Thu, 11 Apr 2019 21:26:15 -0500
> From: Dale Johnson <pastordalej@gmail.com>
> To: Discussion of Ten-Tec Equipment <TenTec@contesting.com>
> Subject: [TenTec] digital readout corsair 2
>
> My digital read out has started to do several things. It intermittently
> freezes on one frequency and won?t respond to the PTO or the band switch. I
> turn the radio off and then back on and the display is completely dark except
> for the decimal. I let it sit for a day, then it came back on after it warmed
> up for a few seconds and worked fine for 3 more days, now it?s done the same
> thing again.
> The manual says that I can damage the digital display with static
> electricity, so is it safe to take the case apart to look for dirty
> connections? Where should I look for the problems? I have checked the VFO
> plug in the back and it looks ok.
> Thank you so much! Dale, KB0SYH
>
>
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