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.
Acer AT2245 & AT2246 TV Service mode PC mode:
I. Press menu key, then press code 2=>3=>4 will 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.
Photo credit to www.inisdesign.com
II. Bias (Low luminance) adjustment:
1. Set the raster pattern (Black pattern with 1024×768) 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.
III, Gain adjustment Acer AT2245 & AT2246 TV Service mode:
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: 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 Warm color-temperature Acer AT2245 & AT2246 TV Service mode:
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.
C. Adjust Standard color-temperature Acer AT2245 & AT2246 TV Service mode:
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.
Turn the POWER-button off to on to quit from Acer AT2245 & AT2246 TV Service factory mode ( in USER-mode, the OSD window location was placed at middle of screen)
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Acer AT2245 & AT2246 TV Service mode PC mode:
I. Press menu key, then press code 2=>3=>4 will into the factory mode, the OSD will show menu
and a word “Factory” at the top of Menu. Written on February 01, 2015