[sdiy] SCI Pro One 15+ power rail

[Stewart Pye]

I'd check the voltage going in to the 7815. If that's OK. Replace the 7815.

Regards,
Stewart.

On 8/28/2013 7:05 AM, Csaba Zvekan wrote:
> 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 All the tantalum caps have been replaced by electrolytics.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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>