Hi,
I just popped the lid on my 66332A, it is marked "225 20K", so 2.2uF 20V, 10% is my guess. It is identical to the one directly below it in your photo.
I just opened up my copy of the service manual (can be downloaded) and it doesn't document the control board, just the analogue board.. may be available in some other service manual for similar power supplies I guess..
Cheers,
Ash.