I used a DSN2596 which is an assembled PCB module that was very inexpensive at $1.44 with free shipping.
Thanks Ted for the heads up on this inexpensive solution
. I've had my RMA info. for my DP832 for a while now. I was holding off on sending it in because they install .09 firmware which can't be downgraded. Also, I didn't want to be without my PS for 6 weeks
. So I threw caution to the wind, tore off the warranty sticker and installed one of these modules. The module has 2 isolated holes in the board for mounting. On the Rigol board there's a board mounting screw in the area of the regulator so I mounted the replacement module in that position using a longer screw and few nylon washers. It worked out very nicely.
...I pulled out the potentiometer and replaced it with two SMT resistors...
The pot on the board was wired as a variable resistor i.e. 2 legs were shorted together. I set it for 5v, pulled out the pot and measured it right at 1k. Conveniently, the manufacturer placed smd pads underneath the pot so it was simple to set it to a fixed voltage. I soldered in a 1k smd resistor which yielded 4.96 vdc out. Meh, close enough. I put the power supply back together, fired it up and discovered it was in about a 5 second reset loop
. I didn't want to mess around with swapping fixed resistors so I just re-installed the original pot. I set it for a touch over 5 volts and put it back together. It was good for about an hour then reset
. This time around I got my tongue at the correct angle, set it to 5.125 volts and reassembled the unit. I put it on an electronic load (Kikusui PLZ50-50A) and set CH1 to 30v@3A/90w. It's been burning in for about 4 hours now without any problems.