i recently picked up a revolution x - 3 person shooter machine, and noticed that the horizontal stretch is a good 3 inches off the sides of the screen

i got to the monitor adjustment board, and didn't notice any horizontal "stretch" dials anywhere, but did notice that one of the resistors was VERY warm.
Would anybody happen to know if this is common for this machine? is there any other way for me to adjust the horizontal stretch? i also noticed that there's no red when i ran the color test. common for this machine?
all help is greatly appreciated!!!
jace