Product data

WN-5220-V Module Level Service Guide

Functional Tests

Every display should be fully tested after it is repaired to verify that all features and

functions are working properly. Take a few minutes to check everything thoroughly

to insure that other problems won’t appear after you have left the customer’s site.

Prior to starting these tests make sure that the Input Levels have been properly set.

Color balance the display or make sure that the red, green and blue Color Balance

numbers are all set to 31.

Test Video

Mode

Pattern or

Image

Pass Criteria

Mechanical

Air Flow N/A Air is blowing out of the Power

Supply Access Cover and the

exhaust vent of the Lamp Access

Cover

Optical

“On” sub-pixels Any Black Less than 12 – see Optical Defect

Specification below

“Off” sub-pixels Any White Less than 10 - see Optical Defect

Specification below

Geometry/

Keystone Issues

Any Geometry Less than 2 pixel tilt across screen

Size External

source only

Geometry Image has 3 rows or columns

behind each mullion and the rest of

the image is in the viewable portion

of the screen.

Dirt/Smudges Any White None visible - see Optical Defect

Specification below

Electrical