[PCR-1000] RE: PCR-1000 Digest, Vol 24, Issue 1

[Tom Hayes]

Sounds like a VCO or PLL problem. Sounds like time to dig out a set of schematics and troubleshoot the frequency synthesis for the PLL.

One idea comes to mind is, is there a secondary power supply inside the unit, probably 5 V or 12 volt (7805 or 7812).  Have you checked the output to see if it is clean (no ripple)? 

Secondly, is this a serial data communications problem, if you monitor the communication port does is work consistently or are there a number of retries indicating it might be serial port issue?  Does it work initially and then degrade?

Have you tried a different PC to eliminate the PC's serial port?

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Subject: PCR-1000 Digest, Vol 24, Issue 1


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Today's Topics:

   1. still power on problem (MN)


----------------------------------------------------------------------

Message: 1
Date: Thu, 29 Mar 2007 22:09:17 +0200
From: MN <haltich at yahoo.de>
Subject: [PCR-1000] still power on problem
To: Discussion of PCR-1000 by Icom <pcr-1000 at mailman.qth.net>
Message-ID: <460C1CED.6050403 at yahoo.de>
Content-Type: text/plain; charset=ISO-8859-15; format=flowed

hello, i postet this already in the yahoo-prc1k-group,
and try it here again, maybe anybody has a good idea
whats wrong...

hey folks

some weeks ago i asked here because my pcr-1k needs some
minutes to lock onto the right frequency after power-on.

i checked the power supply, changed it against a stabilised
13.8V/6A laboratory-powersupply. without any effect.

the pcr needs still some minutes (from 5 up to 15 or 20) after
switching it on to tune the correct frequency.

some more ideas? i use it in the near of my pc, with a
desktop discone connected with a very short rg-59 cable
(around 0.5 meters).

after the first minutes it works perfect... like i told in the last 
message...

thanks for your help

73,
marcus



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