That brings back some memories - day job once - 10+yrs...

Make sure you can try to ascertain, why the diode or diodes fell over.

Just replacing, the diode and not much else, without checking lots, can=20
cost you.

Sometimes the **actual fault** isn't where the fell over bit is.

Also remember to bleed ALL caps before working on the SMPS, these are=20
lethal beasts too!


Those were the days!

Peter


------------------------------------------------------------------------
On 10/08/2017 3:26 PM, Chetan Bhargava wrote:
> This is the second SMPS that I'm trying to fix. The other one is a ATX
> power supply with a blown output diode. Ordering it from Mouser along
> with caps for this power supply.
>
> Here are some links for troubleshooting SMPS:
>
> https://www.mikesarcade.com/cgi-bin/spies.cgi?action=3Durl&type=3Dinfo&pa=
ge=3Dpsrepair.txt
> http://www.repairfaq.org/REPAIR/F_SwitcherPS.html
> http://www.repairfaq.org/sam/smpsfaq.htm#smpsdtfts
>
> ATX:
> http://www.pavouk.org/hw/atxps.png
> http://danyk.cz/s_atx_en.html
>
>
> Chetan Bhargava
> http://microz.blogspot.com
>
>
> On Wed, Aug 9, 2017 at 7:57 PM, Gary Crowell <garyacrowellsr@gmail.com> w=
rote:
>> I have a Samsung DLP, maybe 10yo, that I hope to resurrect sometime.  I
>> found a pages-long thread on some audio forum about the deficiencies of,
>> and the repair and upgrade of the power supply.  Try taking a deep searc=
h
>> on the model number.
>>
>> On Wed, Aug 9, 2017 at 7:48 PM, Chetan Bhargava <cbhargava@gmail.com> wr=
ote:
>>
>>> Here is a picture of SMPS (output stage) from my TV.
>>>
>>> http://i.imgur.com/vOlyFCf.jpg
>>>
>>> I see couple of caps (CM881 and CM853) very slightly bulging. CM881 is
>>> same value as CM876 (not bulging, flat top).  Do they look normal or
>>> should be replaced? The bulge is very slight so presenting to expert
>>> eyes.
>>>
>>> The issue with the TV is whenever there is a loud sound from speakers,
>>> the TV resets. Seems that when the audio amp draws power, power supply
>>> can't deliver. Therefore suspecting the output filter caps.
>>>
>>> Thanks,
>>>
>>> Chetan Bhargava
>>> http://microz.blogspot.com
>>> --
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>>
>>
>> --
>> ----------------------------------------------
>> Gary A. Crowell Sr., P.E. <http://www.ipels.idaho.gov/>, CID+
>> <http://dc.ipc.org/html/default.htm>
>> Linkedin <http://www.linkedin.com/in/garyacrowellsr>  Elance
>> <http://www.linkedin.com/redirect?url=3Dhttp%3A%2F%2Fgaryacrowellsr%2Eel=
ance%2Ecom&urlhash=3DkJm9>
>>    KE7FIZ <http://www.arrl.org>  Things
>> <http://www.thingiverse.com/garyacrowellsr/designs> RocketryCNC
>> <https://www.etsy.com/shop/RocketryCNC?ref=3Dl2-shopheader-name>
>> --
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