[sdiy] SCI Pro One 15+ power rail

[Csaba Zvekan]

I just checked GND and the TL7815 output with the continuity tester and have no short. Also tested the bypass capacitor 2.2µF and out seems OK.


On 27 Aug 2013, at 22:44, Stewart Pye <stewpye at optusnet.com.au> wrote:

> Hi Csaba,
> 
> Have you actually measured a short between the +15V line and ground?
> 
> Regards,
> Stewart.
> 
> 
> On 8/28/2013 6:37 AM, Csaba Zvekan wrote:
>> HI John ,
>> 
>> All the tantalum caps have been replaced by electrolytics. I also removed all the socketed IC's hoping that the voltage comes back to +15V.  Now I will measure OP-AMPS power and see if I have a low resistance.
>> Can I do the same with the CEM3310 and CEM 3320. And most of all can I do it in circuit ? I could go ahead and socket and replace all new OP-AMPS I'm still guessing that's not my problem.
>> I'll double check the bypass caps again.
>> 
>> Csaba
>> 
>> 
>> On 27 Aug 2013, at 22:28, John Henson <synthnerd at eircom.net> wrote:
>> 
>>> Hi all,
>>> before going for a hi-tech approach to a low-tech problem, try removing the tantalum bypass cap right by the regulator, measure its resistance and if it is very low or a short then you have found your problem. I would replace all 4 of the regulator bypass caps with low ESR elctrolytics, I do with every Pro One that comes through here.
>>> 
>>> John.
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