Way to adjust vertical sensitivity

[Dave42]

Is there a way to adjust the vertical sensitivity?
When I perform the 5v Test signal C8 compensation adjustment, I Get a 2.8 graticule deflection, instead of the 2.5 graticule deflection that I should see. I see similar results when I perform the test signal C5 compensation adjustment.

I have measured all the voltages ( when the input is grounded ) and they all appear normal except for V5 which is –3.29v not the -1.6v listed on the schematic.

Any help would be greatly appreciated

[jye1]

You can try to change R11 slightly. When R11 goes up the sensitivity will be lower, and vice versa.