Wednesday, March 13, 2013

ACER - AT2002 LCD TV - SERVICE MODE [FACTORY MODE] - PASSWORD RESET - WHITE BALANCE ADJUSTMENT - GAIN ADUSTMENT




SERVICE MODE [FACTORY MODE]

  •  Press Number key Power key + manual will into the factory mode, and press Menu key the OSD will show menu and a word “F” at LEFT top of Menu.
WHITE BALANCE ADJUSTMENT
  • Before started adjust white balance,set the Chroma-7120 MEM. Channel 1 to 12000 color, MEM. channel 2 to 10000 color, MEM. channel 3 to 8000 color, MEM.
  • Original 12000 parameter is x = 272 ± 15, y = 278 ± 15, Y = 350 ± 7 cd/m2 ; 10000 parameter is x = 279 ± 15, y = 290 ± 15, Y = 350± 7 cd/m2 ; 8000 parameter is x = 295 ± 15, y = 305 ± 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.
  1. Press Number key Power key + manual will into the factory mode, and press Menu key the OSD will show menu and a word “F” at LEFT top of Menu.
  2. In the factory mode select “COLOR TEMP” may be select the difference color temp.
  3. Select SCALER Adjustment:
  4. RG, GG, BG à R, G, B Gain adjust.
  5. RB, GB, BB à 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”}
(Adjust AV mode the same as PC mode, except the luminance (Pc mode is 350cd/m2, Av is 350cd/m2).

BIAS [LOW LUMINANCE] ADJUSTMENT
1. Set the raster pattern (Black pattern with 800×600) 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 measurements reach the lowest value.

GAIN ADJUSTMENT
Adjust 12000 color-temperature:
  • Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>350 cd/m2
  • Switch the chroma-7120 to RGB-mode (with press “MODE” button)
  • Switch the MEM.channel to Channel 02 (with up or down arrow on chroma-7120)
  • The LCD-indicator on chroma-7120 will show x = 272 ± 15, y = 278 ± 15, Y = 350 ± 7 cd/m2
  • Adjust the Color (user) Mode: RED on OSD window, until chroma 7120 indicator reached the value R=100
  • Adjust the Color (user) Mode: GREEN on OSD window, until chroma-7120 indicator reached the value G=100
  • Adjust the Color (user) Mode: BLUE on OSD window, until chroma-7120 indicator reached the value B=100
  • Repeat above procedure (Item 5,6,7) until chroma-7120 RGB value meet the tolerance =100±2
  • Switch the chroma-7120 to x, y, Y mode With press “MODE” button to check the color temp is in SPEC. or not.
  • Press MENU to exit the SCALER page and press Save to save the current color temp.
Adjust 10000 color-temperature:
  • Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>350 cd/m2
  • Switch the chroma-7120 to RGB-mode (with press “MODE” button )
  • Switch the MEM.channel to Channel 02 ( with up or down arrow on chroma-7120 )
  • The LCD-indicator on chroma-7120 will show x = 279 ± 15, y = 290 ± 15, Y = 350 ± 7 cd/m2
  • Adjust the Color(user)Mode: RED on OSD window, until chroma 7120 indicator reached the value R=100
  • Adjust the Color (user) Mode: GREEN on OSD window, until chroma-7120 indicator reached the value G=100
  • Adjust the Color(user)Mode: BLUE on OSD window, until chroma-7120 indicator reached the value B=100
  • Repeat above procedure (item 5,6,7) until chroma-7120 RGB value meet the tolerance =100 ±2
  • Switch the chroma-7120 to x, y, Y mode with press “MODE” button
  • Press MENU to exit the SCALER page and press Save to save the current color temp.
Adjust 8000 color-temperature:
  • Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>350 cd/m2
  • Switch the chroma-7120 to RGB-mode (with press “MODE” button)
  • Switch the MEM.channel to Channel 03 (with up or down arrow on chroma-7120)
  • The LCD-indicator on chroma-7120 will show x = 295 ± 15, y = 305 ± 15, Y = 350 ± 7 cd/m2
  • Adjust the Color (user) Mode: RED on OSD window, until chroma 7120 indicator reached the value R =100
  • Adjust the Color (user) Mode: GREEN on OSD window, until chroma-7120 indicator reached the value G =100
  • Adjust the Color (user) Mode: BLUE on OSD window, until chroma-7120 indicator reached the value B=100
  • Repeat above procedure ( item 5,6,7) until chroma-7120 RGB value meet the tolerance =100 ± 2
  • Switch the chroma-7120 to XyY mode With press “MODE” button
  • Press MENU to exit the SCALER page and press Save to save the current color temp.
PASSWORD RESET
The default PIN for this TV is "0000." First enter "0000" when you want to change the PIN. If you forget your PIN, enter 6163 to reset.

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