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continuous-integration/drone/push Build is passing Details

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Thomas Quinot 4 weeks ago
parent e1d8b44de9
commit 6c5dd9f948

@ -39,12 +39,22 @@ I therefore decided to go for a replacement (also socketing the chip while I was
### Removing the old TMS9900
I did a poor job desoldering and removing the old TMS9900. My main concern was to avoid damaging the PCB, but I had a hard time adjusting the right level of force to the pins. I'm not proud of the result, quite a few pins were broken in the process. :shame:
Let's face it, I did a poor job desoldering and removing the old TMS9900. Was it the Chinese desoldering pump, my lack of skill, a 40+ years old PCB, or a bit of all of these?
My main concern was to avoid damaging the PCB, but I had a hard time adjusting the right level of force to the pins. I'm not proud of the result, quite a few pins were broken in the process. :face_vomiting:
{% figure caption:"At this stage I really hoped that CPU was indeed dead" %}
![Badly damaged TMS9900](assets/TI-resto/20250413-botched-desolder.jpg)
{% endfigure %}
### Preparing for new TMS9900
I cleaned up the board and soldered new female header pins to receive the new CPU.
{% figure caption:"Shiny new female headers to receive the new CPU" %}
![New socket for TMS9900](assets/TI-resto/20250420-socket.jpg)
{% endfigure %}
Pre-power-up checks done:
* visual inspection of solders
* absence of shorts between adjacent pins

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