Tek TDS 3054B main board schematics anyone?

[spark058]

Hi all. I have a Tektronix TDS 3054B portable scope that has problem. It shows up as a trigger glitch on all 4 channels when I tap on the case. I have found the output voltages of a couple regulators go briefly unstable when I tap the case so I assume that is root cause of the trigger behavior. Anyone have experience with this model or access to schematics that would be a great help. Thanks!!