Saturday, January 16, 2016

PANASONIC TX-L42DT50 - TX-LR47DT50 - Servcie mode - Led blinking error code - Data copy by USB - Hotel mode - LCD television Repair and service - Manual Service

Category: LCD Television Repair And Service 

Contents of this article 

  • Service mode
  • Data copy
  • Led blinking code
  • Hotel mode

PANASONIC TX-L42DT50 - TX-LR47DT50

Replacement of ICs:
When Pro4 IC (IC8000) is replaced, NAND FLASH (IC8900) should be also replaced with new one the same time. When NAND FLASH (IC8900) is replaced, Pro4 IC (IC8000) is not necessary to be replaced the same time. After the replacement of IC, SELF CHECK should be done to generate the final KEY data. How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press the MENU button on the remote control for more than 3 seconds. TV will be forced to the factory shipment setting after this SELF CHECK.
USB HDD Recording:
General information:

Digital TV programmes can be recorded in USB HDD.
A One-to-One key generated in A-board by SELF CHECK binds TV and USB-HDD for communication. That key is only one key for them. If the key is difference, TV can not access USB-HDD.
Caution:
New key will be generated by following SELF CHECK and previous TV programmes recorded in USB HDD will not be viewed.
SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press the MENU button on the remote control for more than 3 seconds.
Setting Inspection
Voltage Confirmation
A board
Description
Test point
Voltage
SUB1.1V
TP8100
1.10V - 1.22V
SUB 1.5 V
TP8101
1.435V - 1.585V
SUB1.8V
TP8700
1.7V – 1.9V
SUB3.3V
TP5400
3.17V – 3.43V
SUB5V
TP5420
4.80V - 5.25V
USB5V
TP5440
4.94V – 5.40V
FE1.2V
TP5780
1.14V – 1.26V
FE1.2V/2.5V
TP5720
2.375V – 2.625V
PNL12V

TP4004 (TP4005)

11.5V – 12.9V

LNB_OUTPUT
TP6702
17.0V - 19.0V
12.5V – 14.0V
Connect AC 230V to JK7101 connector
Connect DC 2.5V to TV_SUB_ON P2 connector – pin 8 /TP7416/ from voltage divider.*Beware, for testing of PFC use the GND (TP7203) in Hot area of P board – risk of electric shock
Service Mode Function
MPU controls the functions switching for each IICs through IIC bus in this chassis. The following setting and adjustment can be adjusted by remote control in Service Menu
How to enter into Service Mode
While pressing [VOLUME ( - )] button on the main unit, press the [RED] button on the remote control for 3 times within 2 seconds.
How to exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
Key Command
# Press the 3/4 button to change the adjustment values or function.
# Press the 1/2 button to step up/down through the functions and adjustments
# Press the numerical button VOLUME (+/-) to change of each option item.
# Press the OK button after each adjustment has been made to store the required values.
Service Tool Mode
How to access

1. Select [SRV-TOOL] in Service Mode.
2. Press [OK] button on the remote control.
Display of SOS History
SOS History (Number of LED blinking) indication.
From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.
This indication will be cleared by [Self/check indication and forced to factory shipment setting].
Power ON Time, On/Off
Note: To display TIME/COUNT menu, highlight position, then press MUTE for 3sec.
Time: Cumulative power on time, indicated hour: minute by decimal.
On/Off: Number of On/Off switching by decimal.
Note: This indication will not be cleared by either of the self-checks or any other command.
Exit
Disconnect the AC cord from wall outlet or switch off the power with [Power] button on the main unit.
Hotel Mode
Access command to the Hotel mode setup menu In order to display the Hotel mode setup menu, please enter the following command (within 2 second). [TV] : Vol.[Down] + [REMOTE] : AV (3 times)
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.
Data Copy by USB Memory
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
Note:
Please make only one file to prevent the operation error. 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 2 to 6 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.
Self Check
How to access

Self-check indication only:
While pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control. Self-check indication and forced to factory shipment setting:
While pressing [VOLUME ( - )] button on the main unit, press [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.
Power LED blinking
When abnormality has occurred 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.
Blinking times
Contents
Check point
1

BL_SOS

A BOARD
PANEL
3
IROM SOS
A BOARD
7
SUB3.3V/1.2V
A BOARD
8

SOS

A BOARD
PANEL
9
SOUND_SOS
A BOARD
10
FRC_SOS
FR BOARD
12
BE_SOS
A BOARD
13
EMERGENCY
A BOARD
 LCD Panel Test Mode
Purpose:
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 the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns. And then, judge by the following method. Still 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 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 must be in A board.