Thursday, January 21, 2016

How to enter service mode Emerson lcd tv - EMERSON LC320EMX - LC320EMXF Service mode - Factory reset - Firmware update - VCOM adjustment - Power supply circuit diagram - Schematic - LCD Television Rapier and service - Tips manual

Category: LCD Television Repair and Service 

Contents of this article 

  • How to enter to service mode 
  • Factory Reset 
  • Firmware Update 
  • Power supply circuit 


EMERSON LC320EMX - LC320EMXF

Service mode
How to set up the 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, the display changes
VCOM Adjustment
1. Operate the unit for more than 20 minutes.
2. Set the color analyzer 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.
3. Enter the Service mode.
4. Press [3] button on the service remote control unit.
Press [2] button on the service remote control unit.
5. Press [CHANNEL UP/DOWN] buttons on the service remote control unit so that the color analyzer value becomes minimum.
The white balance adjustment should be performed when replacing the LCD Panel or Digital CBA.
White Balance Adjustment
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 Raster(70%=70IRE, 40%=40IRE).
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.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [VOLUME DOWN] button on the service remote control unit and select “C/D” 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 [CHANNEL UP/DOWN] buttons to adjust the values of color.
7. Adjust Cutoff and Drive so that the color temperature becomes 12000°K (x= 0.272 / y= 0.278 ±0.005)
How to make the Service remote control unit
Cut “A” portion of the attached remote control unit as shown in Fig. 

HOW TO INITIALIZE THE LCD TV
The purpose of initialization is to place the set in a new out of box condition. The customer will be prompted to select a language and program channels after the set has been initialized.
To put the program back at the factory-default, initialize the LCD TV using the following procedure.
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 [INFO] 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.
Firmware Update Procedure
Note: There are two states (the User Upgrade and the Factory Upgrade) in firmware update.
User Upgrade
Upgrade the firmware only. The setting values are not initialized.
Factory upgrade
 Upgrade the firmware and initialize the setting values.
Upgrade are done by the filename.
1. Turn the power off and unplug the AC Cord.
2. Insert the USB memory to the USB port
3. Plug the AC cord in the wall outlet and turn the power on.
4. The update will start
5. When the firmware update is completed, Unplug the AC cord and kindly remove the USB memory from the USB port. Plug the AC cord in the wall outlet again and turn the power on.
Note:
When the Factory Upgrade is used, after restarting TV, shift to initial screen menu in service mode. "INITIALIZED" will appear on the upper right of the screen. "INITIALIZED" color will
change to green from red when initializing is complete.
POWER SUPPLY CIRCUIT DIAGRAM 
CLICK ON TH IMAGE TO ZOOM IN