Category: LED Television Repair and Service
Contents of this article
- How to access Service Mode
- Firmware update procedure
- Power supply Schematics
- Back light LED Driver schematic
PHILIPS 50PFL4909
Service mode
How to set up the service mode
1. Turn the power on.
2. Press [0], [6], [2], [5], [9], [6] and [INFO] buttons on the remote control unit in this order.
1. Turn the power on.
2. Press [0], [6], [2], [5], [9], [6] and [INFO] buttons on the remote control unit in this order.
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 the [7] button on the remote control unit is pressed, 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 the [7] button on the remote control unit is pressed, the display changes.
3. To cancel or to exit from the Purity Check
Mode, press [CH RETURN] or [PREV CH] button.
White Balance Adjustment
The White Balance Adjustment should be performed when replacing the LCD Panel or Digital Main CBA.
Purpose: To mix red and blue beams correctly for pure white.
Symptom of Misadjustment: White becomes bluish or reddish.
Purpose: To mix red and blue beams correctly for pure white.
Symptom of Misadjustment: White becomes bluish or reddish.
ITEM
|
SPECIFICATION
|
Color temperature
|
x=
0.272 ± 0.003
y= 0.278 ± 0.003 |
Input Signal
|
Internal
pattern
(30/50/80% raster) |
Measurement point
|
Screen
center
|
M. EQ.
|
CA-310
(KONICA MINOLTA
Luminance meter) or measuring instrument as good as CA-310. |
Aging time
|
60min.
(Retail MODE/100IRE Raster HDMI 1080i@60) |
MODE setting of TV
|
Shipment
setting/
|
Ambient
|
Retail
MODE
|
temperature
|
25°C
± 5°C
|
1. Operate the unit for more than 30 minutes.
2. Enter the service mode.
3. Press [VOLUME DOWN] button three times on the remote control unit to select “Drive setting” mode. “Drive-” appears in the screen.
4. Set the color analyzer at the CHROMA mode and zero point calibration. Bring the optical receptor pointing at the center of the LCD-Panel.
3. Press [VOLUME DOWN] button three times on the remote control unit to select “Drive setting” mode. “Drive-” appears in the screen.
4. Set the color analyzer at the CHROMA mode and zero point calibration. Bring the optical receptor pointing at the center of the LCD-Panel.
Note: The optical receptor must be set perpendicularly to the LCD Panel
surface
5. Press [3] button to select the “HDB” for
High Drive
Blue adjustment. (“HDB” appears in the screen.)
6. Press [MENU] button. The internal Raster signal appears in the screen. (“Internal (Single)” appears in the upper right of the screen.
Blue adjustment. (“HDB” appears in the screen.)
6. Press [MENU] button. The internal Raster signal appears in the screen. (“Internal (Single)” appears in the upper right of the screen.
7. Press [CHANNEL UP/DOWN] buttons to adjust the
color temperature becomes 12000°K (x= 0.272 / y= 0.278 ± 0.003).
8. Press [1] button to select the “HDR” for High Drive Red adjustment (“HDR” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.
9. If necessary, adjust the “HDB” or “HDR” again
10. Press [6] button to select the “MDB” for Middle Drive Blue adjustment (“MDB” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.
8. Press [1] button to select the “HDR” for High Drive Red adjustment (“HDR” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.
9. If necessary, adjust the “HDB” or “HDR” again
10. Press [6] button to select the “MDB” for Middle Drive Blue adjustment (“MDB” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.
11. Press [4] button to select the “MDR” for
Middle Drive Red adjustment (“MDR” appears in the screen.) and press [CHANNEL
UP/DOWN] buttons to adjust the color temperature.
12. If necessary, adjust the “MDB” or “MDR” again.
12. If necessary, adjust the “MDB” or “MDR” again.
13. Press [9] button to select the “LDB” for
Low Drive Blue adjustment (“LDB” appears in the screen.) and press [CHANNEL
UP/DOWN] buttons to adjust the color temperature.
14. Press [7] button to select the “LDR” for
Low Drive Red adjustment (“LDR” appears in the screen.) and press [CHANNEL
UP/DOWN] buttons to adjust the color temperature.
15. If necessary, adjust the “LDB” or “LDR” again.
16. Press [VOLUME DOWN] button to shift to the “Debugging Message” mode. If there is no message under “[WB]” section, this adjustment completes.
If “Drive settings are NG. Retry again.” Is displayed, repeat above steps from 5. to 15. Then check “Debugging Message” again. If “Drive settings are NG. Retry again.” is displayed, replace the LCD Panel or Digital Main CBA.
17. To cancel or to exit from the White Balance Adjustment, press [CH RETURN] or [PREV CH] button.
15. If necessary, adjust the “LDB” or “LDR” again.
16. Press [VOLUME DOWN] button to shift to the “Debugging Message” mode. If there is no message under “[WB]” section, this adjustment completes.
If “Drive settings are NG. Retry again.” Is displayed, repeat above steps from 5. to 15. Then check “Debugging Message” again. If “Drive settings are NG. Retry again.” is displayed, replace the LCD Panel or Digital Main CBA.
17. To cancel or to exit from the White Balance Adjustment, press [CH RETURN] or [PREV CH] button.
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.
NOTE: Disconnect any device from the USB Port before you conduct on this procedure.
1. Turn the power on.
2. Enter the service mode.
- To cancel the service mode, press [ POWER ] button on the remote control unit.
3. Press [BACK] button to enter the Control Panel Key Confirmation Menu.
4. Press all buttons on the control panel.
5. Press [INFO] button to proceed with the self check mode.
6. Make sure to confirm the "INITIALIZED : OK" appears in the green screen.
7. Unplug the AC Cord and plug it back on again.
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.
NOTE: Disconnect any device from the USB Port before you conduct on this procedure.
1. Turn the power on.
2. Enter the service mode.
- To cancel the service mode, press [ POWER ] button on the remote control unit.
3. Press [BACK] button to enter the Control Panel Key Confirmation Menu.
4. Press all buttons on the control panel.
5. Press [INFO] button to proceed with the self check mode.
6. Make sure to confirm the "INITIALIZED : OK" appears in the green screen.
7. Unplug the AC Cord and plug it back on again.
FIRMWARE UPDATE
Equipment Required
a. USB storage device
b. Remote Control Unit
Firmware Update Procedure
1. Turn the power off and unplug the AC Cord.
2. Insert the USB storage device to the USB port
a. USB storage device
b. Remote Control Unit
Firmware Update Procedure
1. Turn the power off and unplug the AC Cord.
2. Insert the USB storage device to the USB port
3. Plug the AC Cord and turn the power on.
4. After few seconds, the menu mode will appear in the screen.
Note:
After 30 seconds without an operation, the menu mode will disappear automatically.
To display the menu mode again, press the [MENU] button on the remote control unit.
5. Select “Setup” and press the [OK] button to display the setup menu.
6. Select “Software”.
7. Select “Software update”.
8. Select “USB”.
9. Press the [OK] button on the remote control unit to enter the update mode.
4. After few seconds, the menu mode will appear in the screen.
Note:
After 30 seconds without an operation, the menu mode will disappear automatically.
To display the menu mode again, press the [MENU] button on the remote control unit.
5. Select “Setup” and press the [OK] button to display the setup menu.
6. Select “Software”.
7. Select “Software update”.
8. Select “USB”.
9. Press the [OK] button on the remote control unit to enter the update mode.
To cancel the update mode, select “Cancel”
and press the [OK] button.
10. Select the file and press [OK] button.
11. The update will start.
10. Select the file and press [OK] button.
11. The update will start.
12. Select “Yes” and press the [OK] button to
update.
Note:
Do not remove the USB storage device or turn the
TV off while update is in progress.
13. When the firmware update is completed, Remove the USB storage device from the USB port.
Turn the power off and turn the power on again.
Note:
Do not remove the USB storage device or turn the
TV off while update is in progress.
13. When the firmware update is completed, Remove the USB storage device from the USB port.
Turn the power off and turn the power on again.
POWER SUPPLY SCHEMATIC DIAGRAM
UCC28063DR SWITCHING CONTROL IC
FA5640N SWITCHING CONTROL IC
LED BACK LIGHT DRIVER SCHEMATIC DIAGRAM
HA7223PE LED BACK LIGHT DRIVER IC
CLICK ON THE IMAGES TO ZOOM IN
