Tektronix T935A Oscilloscope Repair needed

I have a T935A scope that stopped working. There is a little bit of smoke coming from one of the boards which seems like the crt and vertical amplifier board. However, I can seem to get to the board to see what is smoking. How can I get to the board? It looks like the volts/division module can be removed so I can get a better look. Does anyone know how to do this? I do have the manual for the scope.

thanks,
Dimitri Guest

I am afraid that there are not repair guides or Tek-Fellows around.
T935A was produced and serviced between 1978 and 1990.

all available info and documentations are posted here: T935 - TekWiki (w140.com)