Sylvania, Emerson and Magnavox 19 inch LCD TV – How to enter service mode, adjustments, initialization and more

Applicable to: Sylvania LC195SLX, Emerson LC195EMX, Magnavox 22MF339B/F7 and many more models of these brands 19 inch LCD TVs.
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 RENEWAL MODE

Equipment Required

a. USB memory
b. Remote Control Unit

Firmware Update Procedure
Note: There are two states (the User Upgrade and the Factory Upgrade) in firmware update.

The identification of User Upgrade and Factory
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 and the following will appear on the screen.

“Software upgrade in progress. Please wait.
Do not remove the USB device or turn the TV off while upgrade is in progress”

If the above screen isn’t displayed, repeat from step 1

5. When the firmware update is completed, the screen will be displayed.

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.

Service mode

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.

Test Equipment Required
1. NTSC Pattern Generator (Color Bar W/White Window, Red Color, Dot Pattern, Gray Scale, Monoscope, Multi-Burst)
2. Remote control unit
3. Color Analyzer.

How to make the Service remote control unit:
[LC195SLX, LC195EMX]

Cut “A” portion of the attached remote control unit as shown in Fig.

[22MF339B/F7, 19MF339B/F7]
Cut “A” portion of the attached remote control unit as shown in Fig.

[LC225SSX, LC195SSX]
Cut “A” portion of the attached remote control unit as shown in Fig.

How to set up the service mode:
How to enter 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. The service mode screen appears.

LC195SLX, LC195EMX, LC195SSX, 19MF339B/F7 – SMPS section schematic

22MF339B/F7, LC225SSX – Back-light inverter schematic

22MF339B/F7, LC225SSX – SMPS section schematic

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 center on the LCD-Panel surface after zero point calibration.
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 [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.
3. White Balance Adjustment
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Maladjustment: White becomes bluish or reddish.

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.