[sdiy] SCI Pro One 15+ power rail

[Csaba Zvekan]

Barry,

Could I be using my FOSCAM Baby monitor in infrared mode to find and see the possible bad cap ?


On 27 Aug 2013, at 23:33, Barry Klein <Barry.L.Klein at wdc.com> wrote:

> Just found a shorted multilayer ceramic this way on a server board last week. Took 30 seconds.
> What, you don't have an IR camera?  One coming on Indiegogo for $150....   :-)
> 
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Tony Kalomiris
> Sent: Tuesday, August 27, 2013 1:53 PM
> To: Synth DIY
> Subject: Re: [sdiy] SCI Pro One 15+ power rail
> 
> You could try replacing the 15 V regulator, seeing you replaced the tantalums already.
> Or isolate the PSU from the rest of the electronics to know if something is shorting out.
> Touch the regulator to see if it's getting hot. is the +5 V ok, it's fed from the same full wave rectifier.
> You didn't say what the input voltage was at.
> 
> I like Barry Klein's suggestion, for people with a well equipped bench.
> IR camera eh ? hmm
> 
> Tony K
> 
> 
>> 
>> 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 All the tantalum caps have been replaced by electrolytics.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
>>> 
>>> 
> 
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