White-Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
First adjust PC mode and then adjust AV mode, before started adjust white balance, please setting the
Chroma-7120 MEM. Channel 1 to Cold color, MEM. MEM. channel 3 to standard color, MEM. and MEM.
channel 5 to warm color, ( our cold parameter is x = 300 ± 15, y = 310 ± 15, Y = 350 ± 7 cd/m2 standard parameter is x =314 ± 15, y =324 ± 15, Y = 350± 7 cd/m2;warm parameter is x =326± 15, y = 335± 15, Y = 350± 7 cd/m2)
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.
Notes: Step of AV mode adjustment is the same as PC mode
Photo credit to www.inisdesign.com
Acer AT1945 and Acer AT1946 TV service mode in PC mode:
I. Press menu key, then press code 2 =>3 => 4 will enter into the factory mode, the OSD will show menu and a word “Factory” at the top of Menu.
1. In the factory mode select “COLOR TEMP” may be select the difference color temp.
2. Select SCALER Adjustment: RG, GG, BG => R, G, B Gain adjust. RB, GB, BB => R, G, B Bias adjust.
<Notes: the R, G, B gain use 9 bits, and R, G, B bias use 10 bits to save the value in EEPROM, so if the R, G, B gain and bias is 255 to 256, the “P0 256” will change to “P10”>
II. Bias (Low luminance) adjustment:
1. Set the raster pattern (Black pattern with 1024x768) Input.
2. Set the contrast on OSD window to the value=80, Brightness set to “80”
3. Adjust the brightness on OSD until chroma 7120 measurement reach the lowest value of Acer AT1945 and Acer AT1946 TV.
III, Gain adjustment:
A. Adjust Cold color-temperature:
1. Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>350 cd/m2
2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)
3. Switch the MEM. channel to Channel 03 (with up or down arrow on chroma-7120)
4. The LCD-indicator on chroma-7120 will show x =300 ± 15, y = 310 ± 15, Y = 350 ± 7 cd/m2
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 of Acer AT1945 and Acer AT1946 TV: 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 x, y, Y mode With press “MODE” button to check the color temp is in SPEC. or not.
10. Press MENU to exit the SCALER page and press Save to save the current color temp.
B. Adjust Standard color-temperature:
1. Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>350 cd/m2
2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)
3. Switch the MEM. channel to Channel 03 (with up or down arrow on chroma-7120)
4. The LCD-indicator on chroma-7120 will show x = 314 ± 15, y = 324 ± 15, Y = 350 ± 30cd/m2
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 MENU to exit the SCALER page and press Save to save the current color temp.
C. Adjust Warm color-temperature:
1. Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>350 cd/m2
2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)
3. Switch the MEM.channel to Channel 03 (with up or down arrow on chroma-7120)
4. The LCD-indicator on chroma-7120 will show x = 326 ± 15, y = 335 ± 15, Y = 350 ± 30cd/m2
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 X, y, Y mode with press “MODE” button
10. Press MENU to exit the SCALER page and press Save to save the current color temp.
Turn the POWER-button off to on to quit from factory mode ( in USER-mode, the OSD window location was placed at middle of screen of Acer AT1945 and Acer AT1946 TV.
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Acer AT1945 and Acer AT1946 TV service mode
White-Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. Written on January 28, 2015