NEC MultiSync FP1370 Service Manual page 51

4-9. Corner Distortion Adjustment
Do this integrate when distortion is adjust in the top or the bottom after the integrate to 4-8 sections.
4-9-1. Top Corner Distortion Adjustment
1) Open Menu (S), TAG4 "CORNER TOP".
Adjust "+", "-" SW so that the top corner forms a right angle. (maximum ±1.0 mm)
4-9-2. Bottom Corner Distortion Adjustment
1) Open Menu(S), TAG4 "CORNER BOTTOM".
Adjust "+", "-" SW so that the bottom corner forms a right angle. (maximum ±1.0 mm)
4-9-3. Top Corner Balance Adjustment
1) Open Menu(S), TAG4 "CORNER TOP BAL"
.Adjust "+", "-" SW so that the top corner forms a right angle. (maximum ±1.0mm)
4-9-4 Bottom Corner Balance Adjustment
1) Open Menu (S), TAG4 "CORNER BOTTOM BAL".
Adjust "+", "-" SW so that the bottom corner forms a right angle. (maximum ±1.0 mm)
Signal: No. 33 (788*1200@75Hz) All white
Fig 4-10 Top Corner Distortion
Fig 4-11 Bottom Corner Distortion
Fig 4-12 Top Corner Balance
Fig 4-13 Bottom Corner Balance
5-22