Thank you qrz,
From reading the manual, I believe this is what your talking about.
4. Horizontal Oscillator Adjustment
If there is difficulty in maintaining horizontal sync short out the sync pulse at C901 to ground. Adjust horizontal oscillator coil L901 until raster is a close to sync as possible.
My question is, does it mater what side of C901 I pull to ground ?
Sorry for all the questions, I am trying to learn