Funai LH7-M22BB 22″COLOR LCD TELEVISION-How make a service remote control, how to enter the service mode, service mode adjustments, schematic diagram

 

LH7-M22BB (A9372EP) model.
For the LH7-M22BB (A9372EP)model, the letter (A9372EP) is printed on the Serial Number Label on the back of the unit. Refer to the Serial Number Label on the right.

FUNAI COLOR LCD TELEVISION -  LH7-M22BB

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 onthe remote control unit.
3. Press the {i} button on the service remote control unit to initialize the LCD television.
4. "INITIALIZED" will appear in the upper right of the screen. "INITIALIZED" colour will change to green from red when initializing is complete.

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

How to set up the service mode:
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 as shown in Fig.

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, the display changes as follows.

VCOM Adjustment.

1. Operate the unit for more than 20 minutes.
2. Set the color analyzer and bring the optical receptor to the centre on the LCD-Panel surface after zero point calibration as shown.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
3. Enter the Service mode.
4. Press [3] button on the service remote control unit.
5. Press [P / ] buttons on the service remote control unit so that the colour analyzer value becomes minimum.

Auto Calibration [Component]
Purpose: To bring the colour adjustment of each component into standard alignment.
Symptom of Maladjustment: If this adjustment is incorrect, component signals do not reproduce the corresponding colour.
1. Input 720P 100% Colour Bar signal.
2. Enter the service mode.
3. To enter the Auto Calibration adjustment mode, press [6] button on the service remote control unit.
4. To start auto adjustment, press [P ] button on the service remote control unit.
- In the auto adjustment mode, “Calibration Check” appears on the screen.
- Upon completion, “OK” appears on the screen.

Auto Calibration [PC]
Purpose: To bring the colour adjustment of PC into standard alignment.
Symptom of Maladjustment: If this adjustment is incorrect, PC signals do not reproduce the corresponding colour.
1. Input SVGA 100% White signal.
2. Enter the service mode.
3. To enter the Auto Calibration adjustment mode, press [5] button on the service remote control unit.
4. To start auto adjustment, press [P ] button on the service remote control unit.
- In the auto adjustment mode, “Calibration Check” appears on the screen.
- Upon completion, “OK” appears on the screen.

The following adjustment normally is not attempted in the field. Only when replacing the LCD Panel then adjust as a preparation.

White Balance Adjustment
[Video/Component/PC]
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Maladjustment: White becomes bluish or reddish.

1.Operate the unit for more than 20 minutes.
2. [VIDEO input]
Input the White Raster (70%=70IRE, 40%=40IRE).
[Component input]
Input the 720P White Raster (70%=70IRE, 40%=40IRE).
[PC input]
Input the SVGA White Raster (70%=70IRE, 40%=40IRE).

3. Set the colour analyzer to the CHROMA mode and bring the optical receptor to the centre 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.

Schematic diagram

For continued protection against fire hazard, replace only with the same type fuse.

Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply.  Otherwise it may cause some components in the power supply circuit to fail

The voltage for parts in hot circuit is measured using hot GND as a common terminal.