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It worked!
Not only did replacing the capacitors fix the start up problem, it is
now perfectly stable. It must be that the increasing instability of the
CO2 % was related to a slowly failing pair of capacitors too.
Neil
p.s.
Tips on replacing components:
- To remove, apply the soldering iron directly to the capacitor legs
and try not to burn too much of the PCB around the contact point. If
you wedge a small flat head screwdriver under the body of the old
capacitor as you heat up each leg in turn it will eventually bend the
old legs straight enough to pop out.
- When re-soldering, apply the heat to the component leg and then
press the new solder in against the PCB contact. That way you know
there's enough heat in both pieces and you're not just leaving solder on
the leg and a suspect connection to the board.
On 9/11/2013 4:55 PM, Neil Anthony wrote:
> *****
> To join, leave or search the confocal microscopy listserv, go to:
>
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy> *****
>
> Hi Pascal.
>
> I have useful information, but not sure yet if it will solve the issue.
>
> I've gotten in touch with the guys at PeCon, and they've informed me
> that the Tempcontrol 37-2 digital, Tempcontrol 37 and CO2-Controllers
> made from 2010 through the middle of 2011 could be affected by bad
> capacitors. A PDF containing the details can be downloaded here:
>
https://docs.google.com/file/d/0BzfJAGNfrgieNFJpRWxieWlxNkE/edit?usp=sharing.
> They've recommended replacing both due to 'capacitor plague'
>
http://en.wikipedia.org/wiki/Capacitor_plague.
>
> I opened the unit and those two capacitors do look a little buldged
> compared to the slightly taller ones in between. Out unit is a good
> few years older than the range they state, but I'm going to replace
> them all the same and see if it helps. I'll keep you posted.
>
> Thanks
>
> Neil
>
>
> On 9/11/2013 1:53 AM, Pascal Weber wrote:
>> *****
>> To join, leave or search the confocal microscopy listserv, go to:
>>
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy>> *****
>>
>> Yes Neil, it is!
>>
>> Do you have a solution ?
>>
>> Regards
>>
>
Locked
