I have a 2235A that I bought new in 1991 that is quite good. No problems.
Dual beam, analog, 100 MHz.
Bill W0IYH
My shop scope is a Tek 2236, and I have the service manual for it that I
could scan portions of if helpful. I suspect there are close similarities.
However, for a few bucks, you can obtain the exact manual on a CD at:
http://www.pdf-manuals.com/
W4ZCB