Wednesday, February 18, 2015

EMERSON LC195EM82 - LC195EM87 LCD TV HOW TO ENTER SERVICE MODE AND POWER SUPPLY CIRCUIT

EMERSON LC195EM82 - LC195EM87 

LCD TV

SERVICE MODE AND POWER SUPPLY CIRCUIT 

How to make the Service remote control unit:
Cut “A” portion of the attached remote control unit as shown in Fig.

HOW TO ENTER TO SERVICE MODE
1. Use the service remote control unit.
2. Turn the power on.
3. Press the service button on the service remote control unit.
 Purity Check Mode
This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels.
1. Enter the Service mode.
2. Each time pressing [7] button on the service remote control unit.
Auto Calibration [Component]
Purpose: 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.
1. Input 1080i 100% Color Bar signal.
2. Enter the service mode.
3. To enter the Auto Calibration adjustment mode, press [6] button on service the remote control unit.
4. To start auto adjustment, press [1] button on the service remote control unit.
- In the auto adjustment mode, “Please wait” appears on the screen.
- Upon completion, “OK” appears on the screen.
Auto Calibration [DTV]
Purpose: To bring the color adjustment of DTV into standard alignment.
Symptom of Misadjustment: If this adjustment is incorrect, DTV signals do not reproduce the corresponding color.
1. Enter the service mode.
2. To enter the Auto Calibration adjustment mode, press [6] button on the service remote control unit.
3. To start auto adjustment, press [2] button on the service remote control unit.
- In the auto adjustment mode, “Please wait” appears on the screen.
- Upon completion, “OK” appears on the screen.
The following adjustment normally are not attempted in the field. Only when replacing the LCD Panel then adjust as a preparation.
White Balance Adjustment
[Video]
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Misadjustment: White becomes bluish or reddish.
1. Operate the unit for more than 20 minutes.
2. Input the White Purity.
3. 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.
4. Enter the Service mode. Press [VOL. n] button on the service remote control unit and select “C/D1” mode.
[CUTOFF]
Press [1] button to select “COR” for Red Cutoff adjustment. Press [3] button to select “COB” for Blue Cutoff adjustment.
[DRIVE]
Press [4] button to select “DR” for Red Drive adjustment. Press [6] button to select “DB” for Blue Drive adjustment.
6. In each color mode, press [CH. UP / DOWN] buttons to adjust the values of color.
7. Adjust Cutoff and Drive so that the color temperature becomes 11000K (x= 0.279 / y=
0.272 ±0.005).
The following adjustment normally are not attempted in the field. Only when replacing the LCD Panel then adjust as a preparation.
White Balance Adjustment
[Component / DTV]
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Misadjustment: White becomes bluish or reddish.
1. Operate the unit for more than 20 minutes.
2. Input the White Purity.
3. 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.
4. Enter the Service mode. Press [VOL. DOWN] button on the service remote control unit and select “C/D2” mode.
5. [CUTOFF]
Press [1] button to select “COR” for Red Cutoff adjustment. Press [3] button to select “COB” for Blue Cutoff adjustment.
[DRIVE]
Press [4] button to select “DR” for Red Drive adjustment. Press [6] button to select “DB” for Blue Drive adjustment.
6. In each color mode, press [CH. UP / DOWN] buttons to adjust the values of color.
7. Adjust Cutoff and Drive so that the color temperature becomes 11000K (x= 0.279 / y= 0.272 ±0.005).
How to initialize the LCD television:
1. Turn the power on.
2. To enter the service mode, press the service button on the service remote control unit
- To cancel the service mode, press [POWER] button on the service remote control unit.
3. Press [DISPLAY] button on the service remote control unit to initialize the LCD television.
4. "FF" will appear in the upper left of the screen. "FF" color will change to red from white when initialzing is complete.
POWER SUPPLY CIRCUIT 
CLICK ON THE IMAGE TO ZOOM IN