Originally Posted by baxfromNZ
Several kind people have sent me wiring diagrams but what I need is the circuit diagram of the actual printed circuit boards inside the cluster as the cluster is currently at an instrument repair shop and they have hit a brick wall.
Unfortunately the circuit diagram of the actual printed circuit boards is not available at all because it is not released. Only the wiring diagram is released. We have no idea to obtain it. If you want to get it, you have to do a kind of reversed engineering. You need to write down it seeing and measuring connections of parts by your eyes and equipments.
I just have tried to do so once but I realized that it required me weeks to complete. Luckily I found a soldering crack soon when looking at the board and I was able to fix it. I didn't take any photo of it and I have no idea to provide it to you.
Regarding electrolytic capacitors, they are not infamous Nichicon PF/PR series and they are supposed to last longer.