Thermador display is very dim

[heatwave]

@Doug Cuny;107308

Basically you need three capacitors, two 470 uf’s and a 68 uf (all 35 V). Once you go to any electronics web site you will find a multitiude of uf ratings and voltages. You just need to make sure you get the right ones. People here have suggested getting higher temperature rated ones, and I did. You need to unsolder the old ones and then solder in the new ones. Someone above suggested Mouser Electronics and that is where I got mine. Shipping was more than the parts. You can get a fine tip soldering iron and very fine solder at any Radio Shack. someone above suggested keeping track of the line on the old capacitors and reinstalling the new ones in the same orientation, I just used a sharpie to mark the board where the line should go. Then just take out the board and look for the capacitors - heat the opposite side of the board where the prongs come through and wiggle the capacitors out. The display panel is hinged to a degree on a series of connectors along the edge of the board and will pivot away so you can get to the back of the on capacitor.

Unfortunately I found this site too late. Here’s my situation. I have a Thermador SC302T double oven with a display that is out. Based on instructions from another forum, I opened the control panel, removed the display unit and removed the controller board with the 3 Capacitors (2x 470uf 35v and 1 68uf 35v). I cleanly removed the caps with a desolder tool.

I ordered the replacement hi-temp capacitors from Mouser and they should arrive later this week. Everything was going well till I read this site suggesting I needed to install the new capacitors with the correct polarity. Unfortunately I didn’t mark the + when I removed the old capacitors.

So how do I know which is the positive connection on the board when I install the new caps? I can’t find any markings to properly install the new caps. Any help would be greatly appreciated in determining how to orient the caps before I solder them.