[TenTec] Fw: Problem with Paragon I

[Robert & Linda McGraw K4TAX]

Tried sending this direct to Vic at his address but it was rejected by the 
server.  Hope he sees this.  Thanks for the bandwidth on the reflector.

73
Bob, K4TAX

----- Original Message ----- 
From: "Robert & Linda McGraw (K4TAX)" <RMcGraw at Blomand.Net>
To: <zrdc28 at hiwaay.net>
Sent: Saturday, August 27, 2005 6:54 AM
Subject: Re: [TenTec] Problem with Paragon I


> Vic:
>
> I've seen your post and several of the responses.  Before you start 
> digging into the radio let me ask a few questions to clarify some points.
>
> From my memory of your problem, it appears that the microprocessor 
> initialization from ROM is not being done correctly.    MP's do require 
> that the Vcc come up to correct value and stabilize before running the 
> initialization code.  The process is controlled by the RESET pin and the 
> external to the MP the RC components.  Usually if the C value decreases 
> with age, typical of electrolytic caps, then the initialization is too 
> fast thus scrambled data is loaded from RAM .  I'll look at the schematic, 
> but at present it is at my shop and I'm here at the house.
>
> Here's the questions:  No battery installed in all cases.
> 1. With the PS and radio off, turn the radio on then turn the power supply 
> on in that order.  What happens?
>
> 2.  With the PS off and the radio on, turn the power supply on.  What 
> happens?
>
> 3.  With the PS on and the radio off, turn the radio on.  What happens?
>
> I think you may have stated these in your post but I no longer have it. 
> These answers will better allow me to assist you with your problem.
>
> 73
> Bob, K4TAX
>
>
>