Supermicro / Ablecom SP302-1S Power Supply Failures
At my day job we're seeing some failures of Ablecom (Supermicro) SP302-1S power supplies. These SP302 units are used in 1u Supermicro servers. We had one failed one that was out of warranty, I decided to peel it open and see what went wrong.
Not surprisingly, a Teapo capacitor (1000uf @ 10v) was looking pretty bloated. Replacing it with a random pull that was laying around the lab fixed the power supply. More faulty Chinese capacitors. We've seen 4 more of these supplies fail at work, so my guess is all of them are suffering from the same issue. The other failed ones at work are under warranty, but I'm afraid the replacements will have the same faulty components.
Notes: Revision 3.1, Ablecom, SP302-1S used on Supermicro PDSMI+ system boards. Symptoms, units won't power on, LEDs blink faintly, repetitively, indefinitely. With working supply they come on, even with unit powered off.
(Blue electrolytic capacitor on edge of board is the replaced one.)
CNC (Gonna make you sweat)
Some parts are on hand for building of the 60" x 35" x ?" CNC router!
Still need wood, and some couplers, and all the other parts that we will find out we need once it's halfway done.
Ms. Pac-Fail
I think I'm a okay guy when it comes to electronics knowledge, but I have to admit. The monitor in Ms. Pac-Man is giving me a run for the money. I've replaced the normal common failure parts that are known. Haven't really made much progress. I might just go all out and replace the flyback. The monitor is a Wells-Gardner K7201, so it's a much newer monitor than the original. It looks really good (when working.) There are still some capacitors that haven't been replaced yet, which are next on my to-do list.
Arduino + old LED sign = Newness
TJ continues to make progress in converting an older 12' long (7 pixels high) green LED signboard to run from an Ardunio (Atmel 328) instead of it's original controller. With the new controller the sign will act as a frame buffer off of a host computer, allowing it to act as a spectrum analyzer and other neat effects not possible with most LED signboards.
AMX Automation System Updated
Some minor updates are active on the AMX system at the lab. First, the front screen now has the video projector bulb hour counter displayed on it. It polls the projector every 15 minutes for this. This is the first time I've ever read external data into the AMX system.
There is also a "suspend lab" button on the home screen. It will shut off all downstairs lighting, the arcade games, the projector, and set the volumes to 0.
757 Labs featured on AltDaily
Just a heads up, 757 Labs was featured in an article written by Matt Labarge, published on AltDaily! Check it out here!.
Thanks to Alt Daily for the mention and Matt for the article!
SCEPTRE X9g-Naga V Monitor Fix
Just a heads up, TJ troubleshot a dead19" LCD monitor that was donated to the lab and it's time to share the fix.
SCEPTRE X9g-Naga V, (Sceptre, x9g). Monitor would not power on (power LED would flash a few times I believe.)
The problem - two 1000uf capacitors located next to the transformer on the power supply board. Made with faulty components, swollen tops. Replaced them, works like a champ. Much thanks to Mark G for the monitor! Radio Shack (MacArthur Mall) actually had the parts.
The Road Ahead
Light rail is still a ways off, but the construction in front of the lab is moving along nicely. The tracks pass by us, and are finished off. No sign of power yet, but the street is open in all directions at our intersection.
Sure the prospect of car/train collision is high, but if we get a camera pointed at the most likely point of impact, perhaps we can offer the feed to HRT and VDOT for faster incident response?
Hackerspaces in Space (space… space… space…)
Thursday saw a rather last minute meeting. Attendance was light, but moving forward is always good. At least until we need to move up.
For those of you that couldn't make it, or didn't find out about it until it was too late, the mailing list is working. Please, show it some love. If you're part of the project, and not on the list, contact Ethan or myself to be added.
757Labs Updates
Some random updates as to what is going on:
We've got 4 official members now! Soon possibly 5. This is great news and means there is hope for making it to year #2.
Python group has formed (meetup.com group) and will have first meet at lab on April 21st. CNC mill project has started. "Hackerspaces in space" high altitude balloon contest project underway, mailing list will be fixed shortly. Bug in online skill crane game with website, will be fixed shortly. Lab now has high quality foosball (might be time for electronic scoring system for it). TJ has done great things with plasma display using microcontroller. No environmental sensor network yet, but Skhisma and others working on it.
We had a visitor from Houston's hackerspace, Houston TX RX as well.
Location
Google Calendar
@757Labs
- No public Twitter messages.
Links
User Groups
- 757 CCC Comic & Cartoon Creators
- 757 Objective C Group Objective C and Cocoa programming group.
- 757 Python Users Group
- 757.rb Ruby Users Group
- HR Geeks Hampton Roads Geek Community