White Balance, Luminance Adjustment - Philips Magnavox 15MF400T/37 Service Manual

15" LCD-TV Color Monitor

6. White Balance, Luminance Adjustment

Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
Ⅰ.Before started adjust white balance, please setting the Chroma-7120 MEM. Channel 3 to PC 9300 colors,
MEM. Channel 4 to PC 6500 color, MEM. Channel 9 to AV 7800 colors, Channel 10 to AV 6500 colors
(PC 9300 parameter is x = 283, y = 297, Y = 180 cd/ m
AV 7800 parameter is x = 291, y = 306, Y = 180 cd/ m
Color Temp.
x
y
Y
How to setting MEM.channel you can reference to Chroma-7120 user guide or simple use " SC" key and " NEXT"
key to modify x, y, Y value and use "ID" key to modify the TEXT description
Following is the procedure to do white-balance adjust:
˙There are two methods to access the factory mode:
1. Press Number key 100
2. Press the "menu" key, and re-plug power cable at the same time
Though 1 or 2 will access the factory mode, and press "menu" key the OSD will show menu and a word "F" at
the right top of Menu.
˙ In the factory mode, select "F" function will assess Bias and Gain adjustment.
Auto Level
Black Level
Gain R, G, B Gain adjusts.
Offset R, G, B bias adjusts.
C1 Warm C1 Warm R, G, B gain adjusts, Contrast and Brightness adjust.
C2 Cool C2 Cool R, G, B gain adjusts, Contrast and Brightness adjust.
C3 User C3 User R, G, B gain adjusts, Contrast and Brightness adjust.
Av Warm Av Warm R, G, B gain adjusts, Contrast and Brightness adjust.
Av Cool Av cool R, G, B gain adjusts, Contrast and Brightness adjust.
Burn In Setup Burn-in mode ON / OFF.
Return Exit "F" function factory mode menu.
Ⅱ. Bias (Low luminance) adjustment:
1. Press "AUTO" button.
2. Set the contrast on OSD window to the value=51, color (user) R, G, B set to "50"
3. Adjust the brightness on OSD until chroma 7120 measurement reach the value Y>180 cd/m
Ⅲ. Gain adjustment:
A. Adjust PC9300 color-temperature:
1. Set the Contrast of OSD function to 45 and Adjust Brightness to chroma-7120 Y>180 cd/m
2. Switch the MEM.channel to Channel 03 (with up or down arrow on chroma-7120)
3. Switch the chroma-7120 to RGB-mode (with press "MODE" button)
4. The LCD-indicator on chroma-7120 will show x =283, y = 297, Y = 180cd/m
5. Adjust the Color (user) Mode: RED on OSD window, until chroma 7120 indicator reached the value R=100
6. Adjust the Color (user) Mode: GREEN on OSD window, until chroma-7120 indicator reached the value G=100
7. Adjust the Color (user) Mode: BLUE on OSD window, until chroma-7120 indicator reached the value B=100
8. Repeat above procedure (Item 5,6,7) until chroma-7120 RGB value meet the tolerance =100±2
9. Switch the chroma-7120 to xyY mode with press "MODE" button
10. Press Color (9300) on OSD window to save the adjustment result
B. Adjust PC6500 color-temperature:
PC9300
0.283
0.297
180
9 9 9;
Auto level adjust.
Black level adjust
2
; PC 6500 parameter is x = 313, y = 329, Y = 180cd/m
2
; AV 6500 parameter is x = 313, y = 329, Y = 180cd/ m
PC6500 AV7800
0.313 0.291
0.329 0.306
180
26
15MF400T/37
AV6500
0.313
0.329
180 180
2
2
2
2;
2
)