For reference here is the SAMS IF circuit schematic with the Zenith Service Manual test points and coil/transformer part numbers. Also here are the abbreviated alignment steps:
- L4 41.25mc (Bottom Tuned) - set to minimum response
- L4 41.25mc (Top Null) - set to minimum response
- Directions say not to go back and adjust L4 (this is what I did to get the option 1 response curve, the response curve in option 2 is closer to correct, but that means other adjustments are needed)
- T4 Primary & Secondary - adjust to match response curve
- L1 41.25mc - set to minimum response
- L2 47.25mc (Bottom Null) - set to minimum response
- L2 47.25mc (Top Tuned) - adjust to 47.25mc (some interaction may exist)
- L3 39.75mc - set to minimum response
- Recheck L1, L2, L3
- T1 45.75mc - adjust to match response curve
- T2 45mc - set to maximum response
- T3 43mc - set to maximum response
- Recheck to ensure marker locations and attenuations