Dell 1135N Service Manual page 150

4) Defective Image Quality
Description : The copied image is light or bad.
1. Check shading profile.
2. Check the gap between
original and scanner glass.
3. Check printing quality.
Service Manual
Alignment and Troubleshooting
Perform shading profile in the
tech mode.
The gap above 0.5 mm can
cause a blurred image.
See "Print" troubleshooting.
4-77