Function
The testing of focus sharpness checks that maximum sharpness is ob-
tained to ensure the best possible focus.
Technical data
Focus: < 6 micron
Tools and equipment required
Photoshop plug-in 2.1.7 or latest version
UGRA test target to measure the focus value.
5 • ADJUSTMENTS AND TESTING
Focus Sharpness
Edition 1 • January 1996 Service Manual • ScanMate 4000/5000
5•11a
Caution! ☛ Turn off power • Before connecting or disconnecting cables.
• Before carrying out service operations.
☛ Ensure the UGRA test target is free of dust otherwise false indica-
tions are likely.