19 Inch LCD TV/DVD – Emerson, Sylvania and Manavox – Service mode, firmware update, power and inverter circuit diagram.
Applicable models:19” LD195SSX SYLVANIA
19” LD190SS1 SYLVANIA
19” LD195EMX EMERSON
19” LD190EM1 EMERSON
19” 19MD359B/F7 MAGNAVOX
19” 19MD350B/F7 MAGNAVOX
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:
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:
LD195SSX, LD190EM1, LD190SS1
Cut “A” portion of the attached remote control unit as shown in Fig.
LD195EMX
Cut “A” portion of the attached remote control unit as shown in Fig.
Cut “A” portion of the attached remote control unit as shown in Fig.
19MD359B/F7,
19MD350B/F7
Cut “A” portion of the attached remote control unit as shown in Fig.
Cut “A” portion of the attached remote control unit as shown in Fig.
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 following screen appears.
1. Use the service remote control unit.
2. Turn the power on.
3. Press the service button on the service remote control unit. The following screen appears.
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.
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.
5. Press [CHANNEL UP/DOWN] buttons on the service remote control unit so that the color analyzer value becomes minimum.
White
Balance Adjustment
The
White Balance Adjustment should be performed when replacing the LCD Panel or
Digital CBA.
Purpose:
To mix red, green and blue beams correctly for pure white.
Symptom of Maladjustment: White becomes bluish or reddish.
Symptom of Maladjustment: White becomes bluish or reddish.
1. Operate
the unit for more than 20 minutes.
2. Input the White Raster(70%=70IRE, 40%=40IRE)
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.
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)
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 INITIALIZE THE LCD TV/DVD
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/DVD using the following procedure.
To put the program back at the factory-default, initialize the LCD TV/DVD using the following procedure.
DVD
Section
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. To put the LCD TV/DVD into the DVD mode, press [CH RETURN] or [PREV CH] on the remote control unit.
4. To put the LCD TV/DVD into the Flash clear mode, press [INPUT SELECT] or [SOURCE] buttons on the remote control unit in that order within five seconds.
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. To put the LCD TV/DVD into the DVD mode, press [CH RETURN] or [PREV CH] on the remote control unit.
4. To put the LCD TV/DVD into the Flash clear mode, press [INPUT SELECT] or [SOURCE] buttons on the remote control unit in that order within five seconds.
When “OK” appears on the screen, the factory default will be set.
5. To exit this mode, press [CHANNEL UP/DOWN] button to go to TV mode, or press [POWER] button to turn the power off.
Note: The name of buttons may vary with the brand of unit.
LCD TV Section
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
DVD Section
1. Turn the power on and press [EJECT] button on the remote control unit to put the LCD TV/DVD into DVD mode. Then remove the disc.
2. To put the LCD TV/DVD into F/W version up mode, press [9], [8], [7], [6], and [MODE] buttons on the remote control unit in that order.
3. Insert the disc for version up into the disc slot.
4. The LCD TV/DVD enters the F/W version up mode automatically appears on the screen. Make sure to insert the proper F/W for the state of this model
5. After programming is finished, the disc will be ejected automatically; on the screen and the checksum will be shown.
6. Remove the disc.
7. Unplug the AC cord from the AC outlet. Then plug it again.
8. Press [EJECT] button on the remote control unit to put the LCD TV/DVD into DVD mode again.
9. Press [1], [2], [3], [4], and [INFO] buttons on the remote control unit in that order.
10. Press [CLEAR] button on the remote control unit.
When
“OK” appears on the screen, the factory default will be set. Then the firmware renewal mode is complete.
11. To exit this mode, press [CHANNEL UP/DOWN] button to go to TV mode, or press [POWER] button to turn the power off.
11. To exit this mode, press [CHANNEL UP/DOWN] button to go to TV mode, or press [POWER] button to turn the power off.
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.
[If the upgrade status screen isn’t displayed, repeat from step 1.]
5. When the firmware update is completed, the status will appear on the screen.
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.
[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 schematic- LD195SSX, LD195EMX, 19MD359B/F7
Power schematic 19MD350B/F7, LD190SS1, LD190EM1
Back-light
inverter schematic LD195SSX, LD195EMX, 19MD359B/F7
Back-light inverter schematic 19MD350B/F7, LD190SS1, LD190EM1
Click on the pictures to magnify
CAUTION
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.
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.
