Service manual

4. ADJUSTMENT

4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS

Adjustments should be undertaken only on following function : Contras , Brightness, Black level,

Phase, Clock , H/V-position , Languages, Color-(7200,6500,User), Auto level, OSD-position, Languages,

Reset

4-2 ADJUSTMENT METHOD

Press MENU button to activate OSD Menu or make a confirmation on desired function, Press Left/Right button to

select the function or done the adjustment.

1. White-Balance, Luminance adjustment

Approximately 30 minutes should be allowed for warm up before proceeding white balance

adjustment.

Before started adjust white balance ,please setting the Chroma-7120 MEM. Channel 1 to 7200 color and

MEM. channel 2 to 6500 color, ( our 7200 parameter is x = 302 ±20, y = 319 ±20, Y = 200 ±20cd/m2

and 6500 parameter is x = 313 ±20, y = 329 ±20, Y = 200 ±20 cd/m

)

How to setting MEM.channel you can reference to chroma 7120 user guide or simple use “ SC” key and

“ NEXT” key to modify x,yY value and use “ID” key to modify the TEXT description

Following is the procedure to do white-balance adjust

Press MENU button during 1 seconds along with plug in the DC-power cord will activate the factory mode,

and the OSD screen will located at

left top of panel

I. Bias (Low luminance) adjustment :

1. Press “ AUTO” button , and wait for message “ Pass”

2. Set the contrast on OSD window to the value=45 , color (user )R,G,B set to “50”

3. adjust the brightness on OSD until chroma 7120 measurement reach the value Y=240 cd/m

±10

cd/m