Tuesday, August 25, 2015

FUNAI LH8-M26BB SERVICE MODE AND POWER SUPPLY CIRCUIT

FUNAI LH8-M26BB  


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. 1.

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.1.
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
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 720P 100% Color 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.
5. To cancel or to exit from the Auto Calibration [Component], press [BACK] button.
Auto Calibration [PC]
Purpose: To bring the color adjustment of PC into standard alignment.
Symptom of Misadjustment: If this adjustment is incorrect, PC signals do not reproduce the corresponding color.
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.
5. To cancel or to exit from the Auto Calibration [PC], press [BACK] button.
White Balance Adjustment
[Video/Component/PC]
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. [VIDEO input] Input the White Raster (70%=70IRE, 30%=30IRE).
[Component input]
Input the 720P White Raster (70%=70IRE, 30%=30IRE).
[PC input]
Input the SVGA White Raster (70%=70IRE, 30%=30IRE).
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 [ -] button on the service remote control unit and select “C/D” mode.
5. [CUTOFF]
Press [3] button to select “COB” for Blue Cutoff adjustment. Press [1] button to select “COR” for Red Cutoff adjustment.
[DRIVE]
Press [6] button to select “DB” for Blue Drive adjustment. Press [4] button to select “DR” for Red Drive adjustment.
6. In each color mode, press [P / ] buttons to adjust the values of color.
7. Adjust Cutoff and Drive so that the color temperature becomes 9200°K (x= 0.286 / y= 0.295 ±0.005).
8. Change the video signal input in step 2 and repeat from step 3.
9. To cancel or to exit from the White Balance Adjustment, press [BACK] button.
INITIALIZE THE LCD TELEVISION
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 [ ] button on the remote control unit.
3. Press  [ 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" color will change to green from red when initializing is complete
Precautions during Servicing
A. Parts identified by the  symbol are critical for safety. Replace only with part number specified.
B. In addition to safety, other parts and assemblies are specified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements.
Examples: RF converters, RF cables, noise blocking capacitors, and noise blocking filters, etc.
C. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
D. Use specified insulating materials for hazardous live parts. Note especially:
1) Insulation Tape
2) PVC tubing
3) Spacers
4) Insulators for transistors.
E. When replacing AC primary side components (transformers, power cord, etc.), wrap ends of wires securely about the terminals before soldering.
F. Observe that the wires do not contact heat producing parts (heat sinks, oxide metal film resistors, fusible resistors, etc.)
G. Check that replaced wires do not contact sharp edged or pointed parts.
H. When a power cord has been replaced, check that 5~6 kg of force in any direction will not loosen it.
I. Also check areas surrounding repaired locations.
J. Use care that foreign objects (screws, solder droplets, etc.) do not remain inside the set.
K. When connecting or disconnecting the internal connectors, first, disconnect the AC plug from the AC supply outlet.
L. When installing parts or assembling the cabinet parts, be sure to use the proper screws and tighten certainly.
POWER SUPPLY CIRCUIT 
CLICK ON THE IMAGE TO ZOOM IN