08-24-2020, 01:48 PM
@hackerfantastic Sorry to hear about your PBP dying.
There are schematics on the Wiki. If you find some details that are useful and do not exist, add it to the Wiki. (Or let someone like me know, I've added other things to the Wiki.)
From reviewing page 11 of the main board schematics, it appears it might be one of these parts:
As for letting the smoke out, Sun Microsystems had a design flaw in their first generation Sun Ray thin client. It had a lower wattage resister than it should have had in one place. Every now and then, too much power would go through it, and pop, the magic smoke was released. Please note their was no fire danger. I actually worked at Sun Microsystems in 2003, (before Oracle bought them). One of my co-workers had that happen to her. We laughed about it, as it was an easy swap out. Take the broken one to the mail room and get a new one.
The point of my telling you this story, is that we probably need more eyes on the schematics of our PBPs to find things that MAY be like that example from Sun. I do have some digital design experience, but certainly not enough for a full review. Plus, we still need the board layouts & BOM, (Bill Of Materials, aka parts list), to be released.
In your case, replacing the transistor with a similar but little bit higher current part may help too.
There are schematics on the Wiki. If you find some details that are useful and do not exist, add it to the Wiki. (Or let someone like me know, I've added other things to the Wiki.)
From reviewing page 11 of the main board schematics, it appears it might be one of these parts:
- Q18, a PL3401 P-Channel MOSFET, in a SOT-23 packge
- Q19, a 2SK3019 N-Channel MOSFET, in a SOT-523 package
As for letting the smoke out, Sun Microsystems had a design flaw in their first generation Sun Ray thin client. It had a lower wattage resister than it should have had in one place. Every now and then, too much power would go through it, and pop, the magic smoke was released. Please note their was no fire danger. I actually worked at Sun Microsystems in 2003, (before Oracle bought them). One of my co-workers had that happen to her. We laughed about it, as it was an easy swap out. Take the broken one to the mail room and get a new one.
The point of my telling you this story, is that we probably need more eyes on the schematics of our PBPs to find things that MAY be like that example from Sun. I do have some digital design experience, but certainly not enough for a full review. Plus, we still need the board layouts & BOM, (Bill Of Materials, aka parts list), to be released.
In your case, replacing the transistor with a similar but little bit higher current part may help too.
--
Arwen Evenstar
Princess of Rivendale
Arwen Evenstar
Princess of Rivendale
