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UPBv2 shorted out
Posted: Sat May 14, 2022 4:07 am
by dominatordan
I plugged my UPBv2 into the battery like I always do, heard a pop and saw a wisp of smoke. Smelled burnt plastic. I hoped maybe it was a fuse. Checked voltage on the battery, it was 13.27v. Opened up the box and saw that one of the little chips had a dark spot. I don't know what it does, I'm not an electrician
. I bought the box maybe 4 years ago. I know electronics don't last forever, but, is this anyone else has seen?
Re: UPBv2 shorted out
Posted: Tue May 17, 2022 1:41 pm
by dominatordan
I'd love to know what that chip does, but it seems the folks from Pegasus don't join the forums that often.
Re: UPBv2 shorted out
Posted: Sun Jul 24, 2022 9:14 pm
by johnschnupp
I'm new to the forum but not new to electronics. I don't see any markings on this device/chip but given the arrangement and size of the leads, I suspect this is a voltage regulator. I primary cause of blown voltage regulators in excessive current draw or a short circuit on the output side of the regulator. Without any visible chip markings or a schematic it is hard to tell. I'm quite certain that Pegasus will not provide a schematic as they would consider it as proprietary information.
John Schnupp, N3CNL
2007 R1200RT +69,500
1995 XLH 1200 106,495 (retired)
Georgia, VT
44.7675°N, 73.1592°
Re: UPBv2 shorted out
Posted: Thu Jul 28, 2022 6:02 am
by Evans
This is the LM1117 voltage regulator 12V -> 5V for the microcontroller.
It seems that the a high voltage spike during battery plug damaged the regulator.
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