Re: Actually On Topic Question

[Bob La Londe <none@none.com99>]

On 3/11/2023 8:44 AM, RTS wrote:
> On 3/10/2023 7:32 PM, ABLE1 wrote:
>> Hello Guys!!!
>>
>> Hope everyone is doing well.  As for me, I am still beating the bushes.
>>
>> I have a customer that has a Vista 20p with a Tuxedo Touch Screen that
>> as been working just fine since I installed it 11 years ago and it is
>> now constantly rebooting.  I have not been on site as of yet but, the
>> customer has done some troubleshooting and said that the voltage
>> is holding steady at 13.2vdc while the touch screen reboots.
>>
>> I briefly talked to Tech Support and asked if this was a known issue.
>> I was told that it was not, but should check for a loose connection
>> and check the voltage.
>>
>> Again, I have not been on site, but will be next week.  I thought I
>> would reach out here to see if there should be other things that
>> should be looked at before declaring the Touch Screen was scrap.
>>
>> The docs say that the unit draws 270ma.
>> Presently I am not sure what power source it is connected.
>> I am thinking it would be the Aux + & -
>>
>> I would think if the Aux Power was the issue the voltage would not
>> be holding steady at 13.2vdc.
>>
>> Anyone have any thoughts as to a solution or knowledge on this issue??
>>
>> Thanks,
>>
>> Les
> this may sound crazy,  but  look for "Cricket bits"
>
> this time of year,  we use to have nutty behavior with remote processing
> unit, (keypads, expanders, remote relays)
>
> each time we found Crickets had eaten the insulation off the wires and
> moisture was causing high resistance shorts on the circuits..
>
> Never full time, mostly when the air moisture reach a point when
> droplets formed..
>
> RTS

Lizards can be an issue.  One time we lost a 24(+data) Channel
T-carrier.  We started pulling cards and found a lizard electrocuted and
stuck across the encoder card.  A new encoder card and 24 customers were
back in service.

One of the things I used to see modestly often that causes high
resistance problems is wire that seems to have compressed over time.
The screws were snug when it was installed, but they seemed to have
loosened up.  I think the wire just relaxed under the screw terminal
plate over time.  I once fixed a very expensive environmental monitoring
(temperature, ammonia, air flow etc) multi room multi building cooling
plant by snugging down all the screws in the various controllers, and
resetting the programming to the documented defaults.  The plant manager
was annoyed when I told him that was all I did.  He still paid the bill,
and he was still asking me to do more work as I was getting out of the
business.


--
Bob La Londe
CNC Molds N Stuff
--
Bob La Londe
CNC Molds N Stuff


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