FUNAI LCD A2706 - LCD B2706 - LCD C2706 - LCD D2706 - SERVICE MODE - WHITE BALANCE ADJUSTMENT - AUTO-CALIBRATION - PURITY CHECK MODE - ELECTRICAL ADJUSTMENTS - INITIALIZING - INITIAL SETTINGS - MAIN POWER SUPPLY REGULATOR SCHEMATIC DIAGRAM

SERVICE MODE

• Turn the power off.
• While pressing [SETUP] button, press [STANDBY-ON] button on the TV unit.
• To cancel the service mode, press [STANDBY-ON] button on the TV unit.

Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to perform these adjustments only after all repairs and replacements have been completed. Also, do not attempt these adjustments unless the proper equipment is available.

INITIAL SETTINGS

• Enter the Service mode.
• Set the each initial data as shown on table below:

PURITY CHECK MODE

This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels. When entering this mode, the default setting is White mode. 

• Enter the Service mode.
• Each time pressing [7] button on the service remote control unit, the display changes as follows:

AUTO CALIBRATION

To bring the color adjustment of each component into standard alignment.

Symptom of Misadjustment:  If this adjustment is incorrect, component signals do not reproduce the corresponding color.

Gain adjustment

• Input white raster signal (5%=5 IRE, 100%=100 IRE) from Component jack.

• Enter the service mode.
• To enter the Auto Calibration adjustment mode, press [5] button on the service remote control unit.
• To start auto adjustment, press [CH UP] button on the service remote control unit.
• In the auto adjustment mode, “Please Wait” appears on the screen.
• Upon completion, “OK” and appears on the screen.
• If the auto adjustment failure, “ NG” [Not Good] appears on the screen.

Offset adjustment

• Input white raster signal (5%=5 IRE) from Component jack.

• Enter the service mode.
• To enter the Auto Calibration adjustment mode, press [6] button on the service remote control unit.
• To start auto adjustment, press [CH UP] button on the service remote control unit.
• In the auto adjustment mode, “Please Wait” appears on the screen.
• Upon completion, “OK” and appears on the screen.
• If the auto adjustment failure, “ NG” appears on the screen.

WHITE BALANCE ADJUSTMENT

To mix red, green and blue beams correctly for pure white.

Symptom of Misadjustment: White becomes bluish or reddish.

• Operate the unit for more than 20 minutes.
• Input the White Purity.

• Set the color analyzer to the CHROMA mode and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration as shown above. [Note: The optical receptor must be set perpendicularly to the LCD Panel surface.

• [CVBS]

Enter the Service mode. Press “VOL DN” button on the remote control unit and select “C/D/S 1” mode.

• [YUV]

Enter the Service mode. Press “VOL DN” button on the remote control unit and select “C/D/S 2” mode.

• [RGB]

Enter the Service mode. Press “VOL DN” button on the remote control unit and select “C/D/S 3” mode.

• [CVBS] à (APL 70%)

Press “6” button to select “DB 1(C/D/S 1)” for Blue adjustment. Press “4” button to select “DR 1(C/D/S 1)” for Red adjustment. When “x” value and “y”

value are not within specification, adjust “DB 1(C/D/S 1)” or “DR 1(C/D/S 1)”. Refer to “1. Initial Setting.”

• [CVBS]  à (APL 25%)

Press “3” button to select “COB 1(C/D/S 1)” for Blue adjustment. Press “1” button to select “COR1(C/D/S 1)” for Red adjustment. When “x” value  and “y” value are not within specification, adjust “COB 1(C/D/S 1)” or “COR 1(C/D/S 1)”. Refer to “1. Initial Setting.” (given above).  After adjusting (APL 25%), verify (APL 70%) again and adjust repeatedly until both values are within specification.

• [YUV]  à (APL 70%)

Press “6” button to select “DB 2(C/D/S 2)” for Blue adjustment. Press “4” button to select “DR 2(C/D/S 2)” for Red adjustment. When “x” value and “y” value are not within specification, adjust “DB 2(C/D/S 2)” or “DR 2(C/D/S 2)”. Refer to “1. Initial Setting.”

• [YUV] à (APL 25%)

Press “3” button to select “COB 2(C/D/S 2)” for Blue adjustment. Press “1” button to select “COR 2(C/D/S 2)” for Red adjustment. When “x” value and “y” value are not within specification, adjust “COB 2(C/D/S 2)” or “COR 2(C/D/S 2)”. Refer to “1. Initial Setting.”   After adjusting (APL 25%), verify (APL 70%) again and adjust repeatedly until both values are within specification.

• [RGB]  à (APL 70%)

Press “6” button to select “DB 3(C/D/S 3)” for Blue adjustment. Press “4” button to select “DR 3(C/D/S 3)” for Red adjustment. When “x” value and “y” value are not within specification, adjust “DB 3(C/D/S 3)” or “DR 3(C/D/S 3)”. Refer to “1. Initial Setting.”

• [RGB]  à (APL 25%)

Press “3” button to select “COB 3(C/D/S 3)” for Blue adjustment. Press “1” button to select “COR 3(C/D/S 3)” for Red adjustment. When “x” value and “y” value are not within specification, adjust “COB 3(C/D/S 3)” or “COR 3(C/D/S 3)”. Refer to “1. Initial Setting.”After adjusting (APL 25%), verify (APL 70%) again and adjust repeatedly until both values are within specification.

• Turn the power off and on again. (Main power button on the TV unit.)

TO INITIALIZE THE TV

• Turn the power off.
• To enter the service mode, while pressing [SETUP] button, press [STANDBY-ON] button on the TV unit.
• To cancel the service mode, press [STANDBY-ON] button on the remote control.
• To initialize the LCD television, press “DISPLAY” button on the remote control unit.
• Confirm "FF" indication on the upper left of the screen.

MAIN POWER REGULATOR BOARD - SCHEMATIC DIAGRAM {Click on image to Enlarge}