Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Tuesday, 5 March 2019

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

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