Re: [beagleboard] Re: BB Blue repair

2020-08-03 Thread Jeff Albrecht 
On Sunday, August 2, 2020 at 6:20:02 PM UTC-7 jimf...@gmail.com wrote:

>
> If you have more time than money, you could try to somehow disable the 
> integrated TPS65217C and provide an external 3.3V. Assuming that's the 
> problem at all; it's more likely the load is shorted out than the supply, 
> based on my experiences. Either way, sounds like a big job, I'd rather just 
> buy a new one. 
>
>>
>>
That's exactly what I've been planning to do as last resort. Put an 
external 3.3vdc on the 3.3v rail and see what happens. It's as much a 
learning exercise as a repair now... Hey! I can buy another board, but 
eighty bucks is eighty bucks :-)

 - Jeff
 

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Re: [beagleboard] Re: BB Blue repair

2020-08-02 Thread Jim F 
Indeed. Remember the OSD3358 is a 40$ part while the whole board is 80$.
It's just not a practical repair. If you were sure of the problem and swung
by my lab with the replacement, I might fix it for ten bucks or free if you
were fun to talk to. But as a business if you have to add in shipping and
diagnostic time, it's a total loss.

That's the cost of the integrated system on a chip design of the OSD3358.
Looks like a bare TPS65217C costs around 6$. That's completely fixable, as
a service.

If you have more time than money, you could try to somehow disable the
integrated TPS65217C and provide an external 3.3V. Assuming that's the
problem at all; it's more likely the load is shorted out than the supply,
based on my experiences. Either way, sounds like a big job, I'd rather just
buy a new one.


On Sun, Aug 2, 2020, 7:55 PM evilwulfie  wrote:

> these boards are throw away boards
> Get a new one and dont do what you did to blow up
> your blown up one
>
> On 8/2/2020 4:42 PM, Graham Haddock wrote:
>
> 3.3 Volts is generated inside the OSD3358 by a TI TPS65217C PMIC die
> PMIC stands for Power Management IC
> You can read the TI data sheet on the TPS65217C
> But the OSD3358 is a multi-chip module, so not too much you can do, other
> than replace the entire OSD3358, if damaged.
> And that would require BGA (Ball Grid Array) rework capability.
> --- Graham
>
> ==
>
> On Saturday, August 1, 2020 at 5:54:02 PM UTC-5 Jeff Albrecht wrote:
>
>> On Saturday, August 1, 2020 at 2:45:33 PM UTC-7 Jeff Albrecht wrote:
>>
>>> On Thursday, July 30, 2020 at 6:49:03 PM UTC-7 Jeff Albrecht wrote:
>>>

 I found @jadon Jason Kridner github beaglbone-blue repository
>>>  with Eagle files. Then
>>> found a fork that is probably more authorities as it seems to have several
>>> newer changes, and well Beagleboard :-). beagleboard / beaglebone-blue
>>> 
>>>
>>>
>> How is 3.3V created?
>>
>> I have some experience with KiCad and DipTrace however very little
>> experience with Eagle.
>>
>> I figured out how to highlight the 3.3V net, is there any kind of show
>> origin command?
>>
>> I've exported the parts list and the Netlist. In the parts list there is
>> 5VREG and 6VREG I searched on just '3.3' finding only one part L3 3.3
>> uH.What generates the 3.3 vdc? What is the origin of the 3.3 VDC?
>>
>>  - Jeff
>>
>> --
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> 
> .
>
>
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> .
>
>

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Re: [beagleboard] Re: BB Blue repair

2020-08-02 Thread evilwulfie 

these boards are throw away boards
Get a new one and dont do what you did to blow up
your blown up one

On 8/2/2020 4:42 PM, Graham Haddock wrote:

3.3 Volts is generated inside the OSD3358 by a TI TPS65217C PMIC die
PMIC stands for Power Management IC
You can read the TI data sheet on the TPS65217C
But the OSD3358 is a multi-chip module, so not too much you can do, 
other than replace the entire OSD3358, if damaged.

And that would require BGA (Ball Grid Array) rework capability.
--- Graham

==

On Saturday, August 1, 2020 at 5:54:02 PM UTC-5 Jeff Albrecht wrote:

On Saturday, August 1, 2020 at 2:45:33 PM UTC-7 Jeff Albrecht wrote:

On Thursday, July 30, 2020 at 6:49:03 PM UTC-7 Jeff Albrecht
wrote:


I found @jadon Jason Kridner github beaglbone-blue repository
 with Eagle files.
Then found a fork that is probably more authorities as it
seems to have several newer changes, and well Beagleboard :-).
beagleboard / beaglebone-blue



How is 3.3V created?

I have some experience with KiCad and DipTrace however very little
experience with Eagle.

I figured out how to highlight the 3.3V net, is there any kind of
show origin command?

I've exported the parts list and the Netlist. In the parts list
there is 5VREG and 6VREG I searched on just '3.3' finding only one
part L3 3.3 uH.What generates the 3.3 vdc? What is the origin of
the 3.3 VDC?

 - Jeff

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[beagleboard] Re: BB Blue repair

2020-08-02 Thread Graham Haddock 
3.3 Volts is generated inside the OSD3358 by a TI TPS65217C PMIC die   
PMIC stands for Power Management IC
You can read the TI data sheet on the TPS65217C
But the OSD3358 is a multi-chip module, so not too much you can do, other 
than replace the entire OSD3358, if damaged.
And that would require BGA (Ball Grid Array) rework capability.
--- Graham

==

On Saturday, August 1, 2020 at 5:54:02 PM UTC-5 Jeff Albrecht wrote:

> On Saturday, August 1, 2020 at 2:45:33 PM UTC-7 Jeff Albrecht wrote:
>
>> On Thursday, July 30, 2020 at 6:49:03 PM UTC-7 Jeff Albrecht wrote:
>>
>>>
>>> I found @jadon Jason Kridner github beaglbone-blue repository 
>>  with Eagle files. Then found 
>> a fork that is probably more authorities as it seems to have several newer 
>> changes, and well Beagleboard :-). beagleboard / beaglebone-blue 
>>  
>>
>>
> How is 3.3V created?
>
> I have some experience with KiCad and DipTrace however very little 
> experience with Eagle.
>
> I figured out how to highlight the 3.3V net, is there any kind of show 
> origin command? 
>
> I've exported the parts list and the Netlist. In the parts list there is 
> 5VREG and 6VREG I searched on just '3.3' finding only one part L3 3.3 
> uH.What generates the 3.3 vdc? What is the origin of the 3.3 VDC?
>
>  - Jeff
>
>

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[beagleboard] Re: BB Blue repair

2020-08-01 Thread Jeff Albrecht 
On Saturday, August 1, 2020 at 2:45:33 PM UTC-7 Jeff Albrecht wrote:

> On Thursday, July 30, 2020 at 6:49:03 PM UTC-7 Jeff Albrecht wrote:
>
>>
>> I found @jadon Jason Kridner github beaglbone-blue repository 
>  with Eagle files. Then found 
> a fork that is probably more authorities as it seems to have several newer 
> changes, and well Beagleboard :-). beagleboard / beaglebone-blue 
>  
>
>
How is 3.3V created?

I have some experience with KiCad and DipTrace however very little 
experience with Eagle.

I figured out how to highlight the 3.3V net, is there any kind of show 
origin command? 

I've exported the parts list and the Netlist. In the parts list there is 
5VREG and 6VREG I searched on just '3.3' finding only one part L3 3.3 
uH.What generates the 3.3 vdc? What is the origin of the 3.3 VDC?

 - Jeff

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[beagleboard] Re: BB Blue repair

2020-08-01 Thread Jeff Albrecht 
On Thursday, July 30, 2020 at 6:49:03 PM UTC-7 Jeff Albrecht wrote:

> I broke my BB Blue doing something lame, knowing I shouldn't and being 
> just to lazy to disconnect power before plugging in a LIPO. No more 
> boot.The green power led is lit, that's it.
>
> Does anyone do board level repair of this card for less than the price of 
> a new BB Blue? If I buy a new one what is most current version of the board 
> and where to buy?
>
> The schematic I found doesn't seem to match the board. The schematic 
> doesn't seem to always have component numbers. 
>

I found @jadon Jason Kridner github beaglbone-blue repository 
 with Eagle files. Then found a 
fork that is probably more authorities as it seems to have several newer 
changes, and well Beagleboard :-). beagleboard / beaglebone-blue 
 

I wonder if there is a fork in KiCad? ;-)


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