Optoma 723 Family, Service Manual

Page: 39 / 87

Confidential
4-10
EP721/727/723/728 Family / EW1610 Family
2. Brightness
Procedure - Full white pattern
- Use CL100 to measure brightness values of
P1~P9
- Follow the brightness formula to calculate
brightness values
☼ Brightness Formula
Avg. (P1~P9)*1.1m²
Criteria - 800 lumen (EP721/727 Family) Family))
- 1100 lumen (EP723/728 Family) Family))
- 1000 lumen (EW1610 Family) Family))
3. Ful On/Full Off Contrast
Procedure - Full white pattern & full black pattern
- Use CL100 to measure brightness values of
full white pattern P5 & full black pattern B5
(see image: full white)
- Follow Contrast formula to calculate contrast values
☼ Contrast Formula
P5/B5
Note: P5=center of white image
B5 = the center of black image
Criteria - 1100:1 (EP721/727 Family) Family))
- 1400:1 (EP723/728 Family) Family))
- 450:1 (EW1610 Family) Family))
4. Uniformity
Procedure - Full white pattern
- Use CL100 to measure brightness values of P1~P9 (see im -
age: full white)
- Follow the Uniformity formula to calculate
average values
☼ Uniformity Formula
ANSI Uniformity = Avg. (P1, P3, P7, P9)/P5 X100%
Criteria • 65 %
Full black pattern
Full white pattern