Acer S5201M Series Service Manual page 75

NOTE: If linear degamma is not used then the Microsoft Paintbrush values must be
adjusted to match the degamma table being used in order to generate an equivalent
blue level on the test screen image.
Gray 10 Screen
The Gray 10 screen is used to test for major light blemishes. All areas of the screen
are colored a Microsoft Paintbrush gray 10 (green, red, and blue set at 10).
NOTE: If linear degamma is not used then the Microsoft Paintbrush values must be
adjusted to match the degamma table being used in order to generate an equivalent
gray level on the test screen image.
Gray 30 Screen
The Gray 30 screen is used to test for the reset boundary artifact. All areas of the
screen are colored a Microsoft Paintbrush gray 30 (green, red, and blue set at 30).
NOTE: If linear degamma is not used then the Microsoft Paintbrush values must be
adjusted to match the degamma table being used in order to generate an equivalent
gray level on the test screen image.
3. ACCEPTANCE REQUIREMENTS
Conditions of Acceptance
All DMD image quality returns will be evaluated using the following projected image
test conditions:
a. Test Set degamma shall be linear.
b. Test Set brightness and contrast settings shall be set to nominal.
c. The diagonal size of the projected image shall be a minimum of 60 inches.
d. The projection screen shall be 1X gain.
e. The projected image shall be inspected from an 8 feet minimum viewing distance.
f. The image shall be in focus during all Table 1 tests.
Test Sequence
Tests shall be run in the sequence listed in Table 1.
Table 1. Image Quality Specification
SEQ# Test
Major Dark
1
Blemish
Major Light
2
Blemish
Reset
3 Boundary
Artifact
Eyecatchers /
4 Border
Artifacts
Projected
5
Images
SCREEN
Blue 60
Gray 10
Gray 30
Any screen
1. Any screen
2. Gray 10
3. Any screen
4. Gray 10
5. Whit
6. Any screen
7. Any screen
ACCEPTANCE CRITERIA
1. 4 visible dark blemishes are allowed in the
≦
active area
2. No blemish will be ＞1.5" long/diameter
1. 4 visible dark blemishes are allowed in the
≦
active area
2. No blemish will be ＞1.5" long/diameter
No reset boundary artifacts allowed
Eyecatcher and border artifacts are allowed
1. No adjacent pixels
2. No bright pixels in Active Area
3. No unstable Pixels in Active Area
4. 1 right pixel in the POM
≦
5. 4 dark pixels in the Active Area
≦
6. No DMD window aperture shadowing on the
Active Area
7. Minor blemishes are allowed
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