Panasonic TX55DX650B LED LCD TV - Service adjustments
1. When
servicing, observe the original lead dress. If a short circuit is found,
replace all parts which have been overheated or damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
3. After servicing, do the touch current checks to prevent the customer from being exposed to shock hazards.
4. Always ensure cover label TBM4GU113 is correctly replaced before returning to customer.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
3. After servicing, do the touch current checks to prevent the customer from being exposed to shock hazards.
4. Always ensure cover label TBM4GU113 is correctly replaced before returning to customer.
Touch-Current
Check
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth ground such as a water pipe.
3. Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the above measure.
6. The potential at any point (TOUCH CURRENT) expressed as voltage U1 and U2, does not exceed the following values:
For a. c.: U1 = 35 V (peak) and U2 = 0.35 V (peak);
For d. c.: U1 = 1.0 V,
Note:
The limit value of U2 = 0.35 V (peak) for a. c. and U1 = 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and 2.0 mA d. c.
The limit value U1 = 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.
7. In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer.
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth ground such as a water pipe.
3. Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the above measure.
6. The potential at any point (TOUCH CURRENT) expressed as voltage U1 and U2, does not exceed the following values:
For a. c.: U1 = 35 V (peak) and U2 = 0.35 V (peak);
For d. c.: U1 = 1.0 V,
Note:
The limit value of U2 = 0.35 V (peak) for a. c. and U1 = 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and 2.0 mA d. c.
The limit value U1 = 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.
7. In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer.
How
to access System Information
1. While
pressing [MENU] button on the remote control.
2. Select [ Help] and then select [System Information]
How
to exit
Press the [RETURN] button on the remote control.
Press the [RETURN] button on the remote control.
Hotel
Mode
1. Purpose: To Restrict a function for hotels.
2. To access command to the Hotel mode setup menu.
In order to display the Hotel mode setup menu, enter the following command (within 2 second).
[TV] : Vol.[Down] + [REMOTE] : AV (3 times)
The Hotel mode setup menu is displayed.
1. Purpose: To Restrict a function for hotels.
2. To access command to the Hotel mode setup menu.
In order to display the Hotel mode setup menu, enter the following command (within 2 second).
[TV] : Vol.[Down] + [REMOTE] : AV (3 times)
The Hotel mode setup menu is displayed.
3.
To exit the “Hotel mode”:
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control or:
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control or:
pressing [EXIT] button on the remote control.
Data
Copy by USB Memory
Purpose
a) Board replacement (Copy the data when exchanging A-board):
When exchanging A-board, the data in original A-board can be copied to USB Memory and then copy to new A-board.
Following
data can be copied.Purpose
a) Board replacement (Copy the data when exchanging A-board):
When exchanging A-board, the data in original A-board can be copied to USB Memory and then copy to new A-board.
User setting data: (inc. Hotel mode setting data)
Channel scan data
Adjustment and factory preset data.
Channel scan data
Adjustment and factory preset data.
b)
Hotel (Copy the data when installing a number of units in hotel or any
facility):
When installing a number of units in hotel or any facility, the data in master TV can be copied to USB Memory and then copy to other TVs.
When installing a number of units in hotel or any facility, the data in master TV can be copied to USB Memory and then copy to other TVs.
Following
data can be copied.
User setting data: (inc. Hotel mode setting data)
Channel scan data.
User setting data: (inc. Hotel mode setting data)
Channel scan data.
Preparation
Make pwd file as startup file for (a) or (b) in an empty USB Memory.
1. Insert an empty USB Memory to your PC.
2. Right-click a blank area in a USB Memory window, point to New, and then click text document. A new file is created by default (New Text Document.txt).
3. Right-click the new text document that you just created and select rename, and then change the name and extension of the file to the following file name (a) or (b) and press ENTER.
File name:
(a) For Board replacement: boardreplace.pwd
(b) For Hotel: hotel.pwd
Make pwd file as startup file for (a) or (b) in an empty USB Memory.
1. Insert an empty USB Memory to your PC.
2. Right-click a blank area in a USB Memory window, point to New, and then click text document. A new file is created by default (New Text Document.txt).
3. Right-click the new text document that you just created and select rename, and then change the name and extension of the file to the following file name (a) or (b) and press ENTER.
File name:
(a) For Board replacement: boardreplace.pwd
(b) For Hotel: hotel.pwd
[Make
only one file to prevent the operation error.
No any other file should be in USB Memory.]
No any other file should be in USB Memory.]
Data
Copy from TV set to USB Memory
1. Turn on the TV set.
2. Insert USB Memory with a startup file (pwd file) to USB Terminal.
On-screen Display will be appeared according to the startup file automatically.
3. Input a following password for (a) or (b) by using remote control.
(a) For Board replacement: 2770
(b) For Hotel: 4850
Data will be copied from TV set to USB Memory.
It takes around 1 to 2 minutes maximum for copying.
4. After the completion of copying to USB Memory, remove USB Memory from TV set.
5. Turn off the TV set.
Note:
Following new folder will be created in USB Memory for data from TV set.
(a) For Board replacement: user_setup
(b) For Hotel: hotel.
1. Turn on the TV set.
2. Insert USB Memory with a startup file (pwd file) to USB Terminal.
On-screen Display will be appeared according to the startup file automatically.
3. Input a following password for (a) or (b) by using remote control.
(a) For Board replacement: 2770
(b) For Hotel: 4850
Data will be copied from TV set to USB Memory.
It takes around 1 to 2 minutes maximum for copying.
4. After the completion of copying to USB Memory, remove USB Memory from TV set.
5. Turn off the TV set.
Note:
Following new folder will be created in USB Memory for data from TV set.
(a) For Board replacement: user_setup
(b) For Hotel: hotel.
Data
Copy from USB Memory to TV set
1. Turn on the TV set.
2. Insert USB Memory with Data to USB Terminal.
On-screen Display will be appeared according to the Data folder automatically.
3. Input a following password for (a) or (b) by using remote control.
(a) For Board replacement: 2771
(b) For Hotel: 4851
Data will be copied from USB Memory to TV set.
4. After the completion of copying to USB Memory, remove USB Memory from TV set.
(a) For Board replacement: Data will be deleted after copying (Limited one copy).
(b) For Hotel: Data will not be deleted and can be used for other TVs.
5. Turn off the TV set.
Note:
1. Depending on the failure of boards, function of Data for board replacement does not work.
2. This function can be effective among the same model numbers.
TNPA6263-POWER BOARD - Schematic and PWB1. Turn on the TV set.
2. Insert USB Memory with Data to USB Terminal.
On-screen Display will be appeared according to the Data folder automatically.
3. Input a following password for (a) or (b) by using remote control.
(a) For Board replacement: 2771
(b) For Hotel: 4851
Data will be copied from USB Memory to TV set.
4. After the completion of copying to USB Memory, remove USB Memory from TV set.
(a) For Board replacement: Data will be deleted after copying (Limited one copy).
(b) For Hotel: Data will not be deleted and can be used for other TVs.
5. Turn off the TV set.
Note:
1. Depending on the failure of boards, function of Data for board replacement does not work.
2. This function can be effective among the same model numbers.
Self
Check
How to access
Self-check indication only:
While pressing [VOLUME ( - )] button on the main unit, press [BLUE] button on
the remote control.
Self-check indication and forced to factory shipment setting:
While pressing [VOLUME ( - )] button on the main unit, press and hold the [MENU] button on
the remote control for more than 3 seconds.
How to exit
Switch off the power with the [POWER] button on the main unit.
If the CCU ports have been checked and found to be incorrect or not located then
" - - " will appear in place of "O.K."
Power
LED blinking timing chart
When abnormality has occurred in the unit, the protection circuit operates, and
reset to the stand by mode.
At this time, the defective block can be identified
by number of blinking of the Power LED on the front panel of the unit.
LCD
Panel Test Mode
To find the possible failure point where in LCD Panel or Printed Circuit Board
when the abnormal picture is displayed.
How to Enter
While pressing [VOLUME ( - )] button of the main unit, press [YELLOW] button of
the remote control three times.
How to Exit
Switch off the power with the [POWER] button on the main unit or the [POWER]
button on the remote control.
How to confirm
If abnormal picture is displayed, go into LCD Panel test mode to display several test patterns.
Judge by the following method.
Abnormal picture is displayed:
The cause must be in LCD Panel.
Normal picture is displayed:
The cause must be in A board.
Remarks: The test pattern is created by the circuit in the LCD Panel. In LCD Panel test mode, this test pattern is displayed unaffected by signal
processing for RF or input signal.
If the normal picture is displayed, LCD Panel must be okay and the cause of
failure should be in A board. No more check. Replace the A board. In most cases, data copy might be done as described above.
