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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Thursday, 7 March 2019

PANASONIC TX-L42DT60Y - TX-LR42DT60 SERVICE MODE LED BLINKING CODE AND LCD PANEL TEST MODE - LCD TELEVISION REPAIR

PANASONIC TX-L42DT60Y - TX-LR42DT60 Service mode led blinking code and LCD panel test mode - LCD television repair

Contents of this article

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

Category: Lcd Television repair

PANASONIC TX-L42DT60Y - TX-LR42DT60

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
P15V	TP4003 / TP4004	15.07V – 16.65V
STB5.8V	TP2017 / TP5205	5.05V - 5.59V
STB3.3V	TP5002	3.12V – 3.45V
STB1.1V	TP5003	1.08V – 1.20V
SUB9V	TP5004	8.52V – 9.42V
SUB5V	TP5420	4.91V - 5.43V
SUB3.3V	TP5400	3.16V – 3.50V
SUB1.8V	TP8714	1.76V – 1.94V
SUB1.5V	TP8101	1.39V – 1.53V
SUB1.1V	TP8100	1.08V – 1.20V
USB5V	TP5440	4.94V – 5.46V
SD3.3V	TP8671	3.20V – 3.54V
M3.3V	TP8492	3.14V – 3.48V
M1.2V	TP8406	1.14V – 1.26V
HDMI3.3V	TP8701	3.16V – 3.50V
SUB_AI_3.3V	TP2002	3.16V – 3.50V
SAT_2.5V	TP5705	2.37V – 2.63V
SAT_1.2V	TP5703	1.23V – 1.37V
DMD_1.2/1.1V	TP5702	1.11V – 1.23V

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.