The SDA troubleshooting/failure thread

[CRITIDOC]

Tested the unit this week, worked great for 6 dives on the 7th dive, it was reading a few feet shallow compared to my reference computer. It surfaced normally, was a bit low on power (25%) and turned off normally. The dive was to 35 feet for 60 minutes. when I got back to the room and reached for the computer to charge it, the sda was on reading 860 feet as the current depth, with a deco obligation of 28 minutes at 300 feet.
I give up on this piece of junk.

 

[Scubacastor]

I was wondering if you could try one more thing: remove the resin, unsolder and resolder the battery wire. The thing is that computer is always reading pressure and the sensor has an initialisation procedure. I suspect in some case, some battery issue might corrupt the procedure and lead to wrong measurement. That can be temperature or depth. I know one user that had this problem prior his UEMIS die from battery failure.

 

[Twangthis]

We have found that the batteries in the SDA's do corrupt the information, including faulty dates, times ,inability to make changes to logbooks etc.So far we have brought back a couple computers to full function by removing the resin ,adding new LIPO charging control boards as well as batteries.