The DP832 I ordered from TE came today. It has the version of the board pictured below. It came with firmware 1.06 and the serial number is DP8C153101xxx.
What's weird is it was definitely repackaged, presumably by Rigol NA? For example, the sticker over the IEC connector telling you to check the main voltage setting had already been removed and the box was double taped, with clear packing tape over the original Rigol tape that had been previously cut. Kind of cheesy of Rigol to charge full price for a repackaged unit (IMO).
Still this is a lot better than the first version of the unit I had. Through the vent holes, temperatures on the side of the heatsink were 104*F and and 130*F on the backside where the fins are. This is much cooler than my previous version which was always above 200*F and had the heatsink right beside the caps.
The fan sounds louder to me though. It stays on at full speed. It's just been too long since I had the first version so I can't remember if this is different or not?
I have confirmation that the issue has already been fixed in a new board revision.
They changed the board to fit a larger heatsink, but it's not a huge amount bigger. See photo.
They measured the temp at 76C in a 28C ambient , but I'm not sure if this is free standing out of the case, or in the case with airflow.
They will be replacing all Australian units, I don't know about other countries.
I would not call this a proper belt'n'braces fix, as I think the heatsink still isn't big enough, but it probably now puts it into the (just) acceptable category.
They have also apparently made a few other fixes.
Do you know from what serial number done this new board revision?