Anyone ever repair a B&K 470?

[TinCanAlley]

I have this unit and just had to resolder one of the main capacitors as the lead just pulled out of the board. After doing this, I was able to set the proper heater voltage, G2, G1 and test the emissions of the color guns (all tested fine). I wasn't, however, able to test the leakage of the heater or G1. The meter would drop immediately to 0 for both tests on all three guns. I'm pretty sure there is something wrong as this tube wouldn't provide the brightness and image it does if there was a major leakage in all the guns and heater.

So anyone here ever repair one of these units? I was able to get the schematics and parts list, but the only thing the service manual has is how to calibrate the heater voltage of the unit, nothing else. I'm hoping someone can point to an area for inspection/repair.