NEC MultiSync FE700 Serviceanleitung Seite 108

(c) Other glass defects
Flaw, crack and lack cannot be distinguish easily by naked eye.
Iron rust conforms to limited sample.
2.2 AR-film's surface defect
2.2.1 Inspection condition
(1) Put a valve on an inspective stand and Illuminate it from the top with white fluorescent
light.
(2) Valve surface illuminance is less than 1500Lux and more than 1000Lux.
(3) Observe from distance of 40cm from surface, disregard flaws which can not be
distinguished from this distance.
2.2.2 Division of zone
A screen is divided into following 3 zones.
zone A : Area inside the rectangle that measures H : 300 mm, V : 225 mm at the center
of screen.
zone B : Area outside zone A and inside the fluorescent surface edge.
zone C : Area outside the fluorescent surface edge.
225mm
zone A
300mm
6- 7
fluorescent surface edge
zone B
zone C