Most likely the cap on the CPU reset line has decreased in value due to age.
Replace it with one of equal value.
The backup battery requires power to be applied frequently to maintain charge
and memory. Otherwise it defaults to factory settings.
Probably time to clean connectors.
Bob, K4TAX
Sent from my iPhone
> On Sep 22, 2020, at 1:28 PM, ROLAND HOWELL via TenTec <tentec@contesting.com>
> wrote:
>
>
> Hi All
>
> While waiting for Argosy 2 bits i decided to take a look at the paragon 585 i
> have laying about being a idle/lazy radio.
>
> Can't remember why it was put to 1 side (till now) on powering it up the
> first thing i noticed was that the display wasn't working, checked the reset
> button, it was broken. replaced that and the display came on, hah i thought
> solved, also saw that the back up battery had failed or was flat, battery
> connector was starting to suffer from the green corrosion so i ordered a
> replacement, next i turned off radio, when i turned it on again, no display!,
> pressed the reset button and it worked.
>
> Studying the diagram it seems that U8 pin 2 is the IRQ or wake up line, Q4
> seems to be misbehaving?.
>
> Any of you learned gents able to confirm that or have you met this problem
> and what did you do to cure it.
>
> thanks in anticipation
>
> 73
>
> Snowy G0HZE
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|