Saturday, February 06, 2016

How to enter service mode Panasonic LCD TV - PANASONIC TX-L37D25B - TX-L32D26B – Service mode – LED blinking code – Self check mode – Hotel mode – LCD television repair and service

Category: LCD Television Repair and Service 

Contents of this article 

  • How to access service mode 
  • LED Blinking code 
  • Hotel mode 
  • Data copy procedure 


PANASONIC TX-L37D25B - TX-L32D26B

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 SERVICE
While pressing (-/v) button on the TV unit, press 0 on the remote control for 3 times within 2 seconds.
Note:
To exit from Service mode, press the exit button on 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 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” menu press the EXIT button on remote control.
Data Copy by SD Card
Preparation
Make pwd file as startup file for (a) or (b) in an empty SD card.
1. Insert an empty SD card to your PC.
2. Right-click a blank area in a SD card 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 SD card.
Data Copy from TV set to SD Card
1. Turn on the TV set.
2. Insert SD card with a startup file (pwd file) to SD slot.
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 SD card.
It takes around 2 to 6 minutes maximum for copying.
4. After the completion of copying to SD card, remove SD card from TV set.
5. Turn off the TV set.
Note:
Following new folder will be created in SD card for data from TV set.
(a) For Board replacement: user_setup
(b) For Hotel: hotel
Data Copy from SD Card to TV set
1. Turn on the TV set.
2. Insert SD card with Data to SD slot.
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 SD card to TV set.
4. After the completion of copying from SD card, remove SD card 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.
Replacement of ICs:
When LDA2 IC (IC8000) is replaced, EEPROM (IC8950) should be also replaced with new one the same time.
When EEPROM (IC8950) is replaced, LDA2 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 [MENU] button on the remote
control for more than 3 seconds.
TV will be forced to the factory shipment setting after this SELF CHECK.
Setting Inspection
A board
Description
Test point
Voltage
5.8VS
TP2750
5.8V +/- 2%
STB_SUB_5.8V
TP2789
5.8V +/- 2%
GND
TP2785
0V
BL_SOS
TP2780
0V
P17V
TP2782
18V +/- 2%
SUB_F12V_15V
TP2783
12V +/- 2%
SUB3.3 V
TP5503
3.21V - 3.45V
SUB 1.5 V
TP5502
1.47V - 1.56V
SUB1.2V_A
TP5500
1.26V - 1.33V
SUB1.2_D
TP5501
1.26V - 1.33V
SUB5V
TP5200
4.86V - 5.14V
SUB_OP_5V
TP5300
4.92V - 5.31V
 XW board
Description
Test point
Voltage
STB5.6V
TP6700
5.51 - 6.09V
-SUB3.3V
TP6701
3.135 - 3.465V
DTV15V
TP6702
11.4 - 12.6 V
VDD1.0V
TP6703
0.95 - 1.15V
IF3.3V
TP6704
3.15 - 3.45 V
1.2V
TP6851
1.08 - 1.32 V
5.0V
TP6852
4.75 - 5.25 V
2.5V
TP6937
2.30 - 2.70 V
Self Check
Self-check is used to automatically check the bus lines and hexadecimal code of the TV set. To enter Self-Check mode, keep pressing the down (-/v) button on the TV set and press the STATUS button on the remote control. To exit Self Check, switch off the TV set at the power button.
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
P UNIT
3

SOS

A BOARD
XW BOARD
4


SUB_F_12V_SENSE SOS


A BOARD
P UNIT
XW BOARD
7

SUB_3.3V_SENSE SOS

A BOARD
XW BOARD
9

SOUND_SOS

A BOARD
P UNIT
10
ZWEI_SOS
TC BOARD
13
Emergency SOS
A BOARD