Envision P2271WL, Service Manual

Page: 39 / 57

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9. White- Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
How to setting MEM channel you can reference to chroma 7120 user guide or simply use “SC” key and “NEXT” Key
to modify xyY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance
adjust .
1. Setting the color temp. you want
A. MEM.CHANNEL 3 Warm (6500K):
Warm color temp. parameter is x = 313 ±20, y = 329 ±20
B. MEM.CHANNEL 4 Normal (7300K):
Normal color temp. parameter is x = 301 ±20, y = 317 ±20
C. MEM.CHANNEL 9 Cool (9300K):
Cool color temp. parameter is x = 283 ±20, y = 297 ±20
D. MEM.CHANNEL 10 (sRGB color):
sRGB color temp. parameter is x = 313 ±20, y = 329 ±20
2. Enter into the factory mode
DC “Power” off, when pressing “MENU” and “AUTO”, DC “Power” on, then press “MENU” again, you will enter into
the factory mode.
3. Gain adjustment:
Move cursor to “-F-” and press MENU key
A. Adjust Warm (6500K) color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 3 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 313 ±20, y = 329 ±20
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
B. Adjust Normal (7300K) color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 4 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 301 ±20, y = 317 ±20
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2