[TenTec] Paragon 585 troubleshooting

[Dukes HiFi]

I think I still have my logic board.

Gary


> On Apr 29, 2017, at 6:57 AM, Joe Hetrick <jhetrick at bitjanitor.net> wrote:
> 
>  I replaced the harness initially; but the reality is after having it more fully apart, it probably needs a new logic board.  The damage from the battery corrosion is significant and probably covers 75-85% of the board.  Most of the IC's legs appear to have corrosion between them, and I do no relish cleaning the corrosion and then trying to replace components whose legs are corroded away after.  Suddenly it becomes quite a task.
> 
> I spent some time last evening cleaning traces on the LB and found at least a half a dozen components that are far enough gone (mostly resistors, but at least 2 16 pin IC's) that they'd need to be replaced.  I see no sense in cleaning the board up and leaving those components in place, in most cases the worst ones are components who have corrosion underneath them.
> 
> The time and expense at this point are discouraging.  I think the most logical thing at this point is to part out and offer up the functioning parts of the unit (which..is everything minus the logic board).
> 
> So, thanks to everyone for their advice.  A lesson was learned in the end, so, as always there are silver linings.
> 
> 
> 73 
> Joe KC0VKN
> 
> 
> On 27 Apr 13:32, Stuart Rohre wrote:
>> very likely the measurement of a fully charged battery after a day
>> or so, means the battery recharger is working.
>> 
>> You do not mention if you removed the corrosion from all the battery
>> contacts and IN BETWEEN THE TRACES OF THE PCB.
>> 
>> Likely you have conductive compounds on the PCB that are causing
>> current to flow all the time from the battery to other circuits
>> besides the memory keep alive bus.  You may also have a bad
>> electrolytic on that bus.
>> 
>> Keep looking for such problems and you should be able to find the leaks.
>> Does your DVM also measure small current values?  That could be helpful.
>> 
>> I use baking soda to neutralize acid stains, vinegar to neutralize
>> alkaline battery spills, and rubbing alcohol and distilled water, to
>> clean things up, (clear type ALcohol only).
>> 
>> Good lUck,
>> Stuart Rohre
>> K5KVH
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