It measures 25 or 26 diagonal, I will try the camera trick.
In case you missed earlier in the thread I found these:
JS270104-2192 Sony-R JS Dual Scan
The cable I pointed out is labeled as the 15 / 25 jumper so I am very sure its just a matter of unplugging one side of it and plugging it into the middle slot, just cant figure out which side. I am not home to take more pics but this might help some: