QLS 21F1 _ SERVICE MODE ENTRY AND ADJUSTMENT PROCEDURE

TO ENTER SERVICE MODE

• Switch on the TV set.
• Press the “MENU” key on RC to show the “PICTURE” OSD menu.
• Move the cursor to “Contrast” item then press the “9”, “7”, “3”, “5” key continuously on RC within 3 seconds then enter P-Mode.
• The “P” letter will appear on the left low corner of the screen when enter P-Mode.
• Also the “FACTORY HOTKEY” will be set to “ON ( = 1 )”.

AN ALTERNATE METHOD TO ENTER SERVICE MODE

• Press the “RECALL” key on RC to enter P-mode directly.
• This will be active only when the “FACTORY HOTKEY” had set to “ON ( = 1 )”.
• When the power on with “FACTORY HOTKEY” had set to “ON ( = 1 )”, the set will enter the P-Mode automatically.
• Press the “RECALL” or “MENU” key on RC to exit the P-Mode.

KEY FUNCTIONS IN SERVICE MODE

• Press “0” to “9” key to select factory adjustment page.
• Press [UP | DN] key to select option.
• Press [LEFT | RIGHT] key to adjust or select option.
• Press “DISPLAY” key to display software version.
• Press “MENU” key to exit the P-Mode.
• Press “RECALL” key to enter or exit the P-Mode.
• All change in P-Mode will be saved in EEPROM automatically

WHITE BALANCE ADJUSTMENT

1. Input a black and white pattern to RF input.
2. Enter P-Mode, press key “3 ” to select white balance adjustment menu.
3. Use the color analyzer to measure the black side of the screen.
4. Adjust the value of “RC”,”GC” and “BC” to set the reading of the color analyzer to x=274, y=280. (11500 K).
5. Then measure the white side of the screen. Adjust the value of “RD”, “GD” and “BD” to set the reading of the color analyzer to x=274, y=280. (11500 K).
6. Repeat step 3&4 until you can get the correct reading for both black and white sides.

The “SUBB” and “SubCON” items are used to assistant the white balance adjustment.  It is the same function as the user OSD menu “Brightness” and “Contrast” items. You can adjust these items to get the expect intensity when adjusting the white balance.

YUV white balance black level offset setup:

It is not need to adjust the white balance for YUV mode when production, but the BLOR-Y, BLOG-Y and BLOB-Y items which locate in EEPROM address 0x0A, 0x0B and 0x0C need to write in the right values to set the YUV mode black level offset before production. These offset values should be written by the PE engineer when making the EEPROM copy for the new lot with difference tube.