Service manual

R910E Service Manual
33
8. WHITE- BALANCE, LUMINANCE ADJUSTMENT
Approximately 30 minutes should be allowed for warm up before proceeding White-Balance adjustment.
1.How to do the Chroma-7120 MEM. channel setting
A、Reference to chroma 7120 user guide
B、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
2.Setting the color temp. you want
A、MEM.CHANNEL 3 ( 7800 color):
7800 color temp. parameter is x = 296 ±10, y = 311 ±10, Y = 200 ±10 cd/m
2 ,
B、MEM.CHANNEL 4 ( 6500 color):
6500 color temp. parameter is x = 313±10, y = 329 ±10, Y = 200 ±10 cd/m
2
)
3.Into factory mode of LM929
Press MENU button during 2 seconds along with press Power button will activate the
factory mode, then MCU will do AUTO LEVEL automatically. Meanwhile press MENU
the OSD screen will located at LEFT TOP OF PANEL.
4.Bias adjustment:
Set the Contrast
to 50
Adjust the Brightness
to 80.
5.Gain adjustment :
Move cursor to “-F-” and press MENU key
A、Adjust C2(7800) 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 = 296 ±10, y = 311 ±10,
Y = 200 ±10 cd/m
2
4、 Adjust the RED of color1 on factory window until chroma 7120 indicator reached
the value R=100
5、 Adjust the GREEN of color1 on factory window until chroma 7120 indicator reached
the value G=100
6、 Adjust the BLUE of color1 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