Acer AM501 Service Manual page 21

4.10.6 Geometric Distortions
1. Pincushion
Pincushion(top)
Pincushion(bottom)
Pincushion(leftside)
Pincushion(rightside) a2≦1.5mm
"S" distortion
2. Barrel
barrel(top)
barrel(bottom)
barrel(leftside)
barrel(rightside)
3. Trapezoid & Parallelogram distortion
d1≦1.5mm
d2≦1.5mm
a1≦1.5mm
≦0.5mm
c1≦1.5mm
c2≦1.5mm
b1≦1.0mm
b2≦1.0mm
a≦2.0mm
b≦2.5mm
17
Figure 11