[Louthrax]

Yes, my dear OSSC is back from the dead 🙂

I order the components at LCSC for $12.05 inluding shipping on March 1st, and received everything today.
SMD soldering is still a painful experience for me, those things are sooooo tiny !! I had to unplug and secure the LCD flat cable to avoid burning it with the soldering iron, but it all worked well finally.

And now, I’ll just enjoy a good video-perfect gaming afternoon 🙂

PS : If anybody happens to have the same issue (shorted regulator) with the same “special” PCB as I have, I can snail-mail the part (as I’ve order 5x units). I also have 4x remaining D5 and F1.

• This reply was modified 1 year, 4 months ago by Louthrax.
• This reply was modified 1 year, 4 months ago by Louthrax.
• This reply was modified 1 year, 4 months ago by Louthrax.

[Louthrax]

Perfect !

I’ll check the suppliers you recommended, order everything (with a few extra spare AMS117), and let you know of my results.

Thanks a lot again Morpheus_79 for all your valuable and quick answers 🙂

[Louthrax]

Thanks a lot Morpheus_79, I did not realize my PCB was different and was about to order the wrong replacement regulator !

I check the label on my extracted U5 and it’s “AMS 117 3-3 LD818“. From what I’ve seen here: , it indeed has pin 1 for Ground, pin 2 for Vout and pin 3 for Vin.

We kind of double-posted here, but as I said in my previous message, pins 1 and 2 of my U5 are still shorten even when extracted. So I’m assuming the problem is restricted to U5 only ?

I do not remember where I ordered my OSSC but I can retrieve that information if anybody is interested. Maybe they changed the U5 for costs reasons or because it would no longer be produced in a near future ?

• This reply was modified 1 year, 4 months ago by Louthrax.

[Louthrax]

So I decided to try my luck and unsoldered U5 (I was very carefull not to burn the LCD flat cable during that operation).

It went well and all other regulators do now show correct ground connection. I checked the extracted U5 and it indeed still has a short between pins 1 and 2 (same as shown in the pictures above). That explains I guess to super hot temperature it had ?

I’ll order a new U5 and also fuse and diode and see if it brings my dear OSSC back to life, just crossing my finger nothing else is damaged on the PCB 🙂

Just a noob question about ordering : I went on Mouser (as the OSSC BOM has direct links to them), but the shipping fees are veeeeeeery expensive (around 20€) compared to the few things I’d like to order. Would anybody have recommendation for another reliable supplier for Europe ?

 

[Louthrax]

So I decided to try my luck and unsoldered U5 (I was very carefull not to burn the LCD flat cable during that operation).

It went well and all other regulators do now show correct ground connection. I checked the extracted U5 and it indeed still has a short between pins 1 and 2 (same as shown in the pictures above). That explains I guess to super hot temperature it had ?

I’ll order a new U5 and also fuse and diode and see if it brings my dear OSSC back to life, just crossing my finger nothing else is damaged on the PCB 🙂

Just a noob question about ordering : I went on Mouser (as the OSSC BOM has direct links to them), but the shipping fees are veeeeeeery expensive (around 20€) compared to the few things I’d like to order. Would anybody have recommendation for another reliable supplier for Europe ?

 

[Louthrax]

So here are snapshots of my PCB with all regulators pins connected to ground marked (I checked all 5 pins for each of them). U4 does not look like a regulator but I checked it anyway…

Interesting thing is that only U6 seems to be OK :

 

• This reply was modified 1 year, 4 months ago by Louthrax.

[Louthrax]

Thanks Morpheus_79 for the help. I checked the regulators : U5 has two pins connected to GND (the middle one plus another one), and most of the bottom side regulators also the two pins connected to ground (also the middle one plus another one).

Do you think that this short circuit is internal to a regulator (and that I should try to replace it), or might it be located elsewhere  ?

I also noticed that my U5 has no heatsink, and that it gets burning hot. Could it be that letting the OSSC ON during several days without heating caused some melting or short inside it ?

 

• This reply was modified 1 year, 4 months ago by Louthrax.

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