REPAIRING AND NOT THROWING AWAY

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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Friday, 14 August 2020

SEMP TCL 50P715. 55P715, 65P715 AND 75P715 – HOW TO ENTER THE SERVICE MODE, SOFTWARE UPDATE, POWER BOARD ELECTRIC SCHEMATIC DIAGRAMS

 

 TCL 50P715 127cm (50 Inch) Ultra HD (4K) QLED Smart Android TV

ACCESSING THE FACTORY MENU

Whenever in this manual you request to access the factory menu, the following procedure must be performed:

- Turn on the device;

- On the remote control, press the SETUP key (key) (1);

- Select “Image” option (1);

- Scroll down the options until you find “Advanced Settings” (2) and select;

- Select “Brightness Adjustment” (3);

- Keep the cursor on the “Contrast” option (4)

- On the remote control press the number sequence 9735

Note: Since the original remote control for this model does not have the numeric keys to enter this code, a control of another model of the same brand must be used, in the case of “TCL”, to be able to access the menu of factory.

- Once control is obtained and the sequence is entered, the factory menu will be available.



CHECKING THE SOFTWARE VERSION.

Entering the Factory Menu we can see the version of the software in use:

Main SW update via the User Menu.

- Save the file to the root of a USB device by renaming it as “update.img”.

- With the device disconnected from the mains, connect the USB device, with the installation software, on the USB port.

- Press the TV's Power key and, keeping it pressed, connect the TV to the mains.

- The update will start. After approximately 7 minutes the TV will automatically restart

PROJECT ID update

(If panel information is wrong)

If the screen is completely dark due to the difference in panel x installed software, press 062598 + MENU + xxx (xxx: Panel ID).

In this part, put a note: If the panel used is not included in this list, contact the assistance department technique to obtain the correct ID


After the update, the TV will enter TV mode and the channel that was previously selected.

INTERNET UPDATE

Main Processor

During the update process via the internet, connection failures and even power outages can occur. In these cases the behavior of the device is as follows:

Loss of Internet connection - For download, inform the user and exits the process. Does not compromise the functioning of the TV - Smoothly. The update will continue

Power outage - For download. Does not compromise the functioning of the TV - For the update. Does not compromise the functioning of the TV

PANEL TEST MODE (WARM UP)

Recommended for panel analysis (spots, dots, scratches, etc.).

Enter the Factory Menu as indicated before, choose the option “9-Sita P mode” and turn it on Turn off the TV by the Power key and turn it on again.

Enter the Factory menu again and then select the warm up option. A sequence of screens in different colors where you can check in more detail, possible panel failures.

To EXIT the warm up mode, press the POWER key on the device as the remote control functions will be disabled and if the device is just disconnected from the network, the “warm up” mode will return when is connected to the network again.


Verification of Software Keys

-After turning on the TV with the Sita P mode option on, we will see a frame on the bottom left of the screen with The informations:

In it we can see again the software version, the project ID and the activation keys of the different resources of product:


TENSION TABLE AND SOFTWARE UPDATE

MID: MAC & DID & HDCP & WIDI & WideVine & MGK

MAC (Mac Address) aWithout recording this key, it is not possible to connect to the internet network via ethernet (LAN);

DID: Project identification, already included in the product software,

HDCP without recording this key, high definition images via wireless will not be reproduced;

WIDI without recording this key, image mirroring via wireless will not be reproduced;

Widevine without recording this key, content from YOUTUBE and other sites will not be played;

MGK without recording this key, we will not have access to Netflix content.

IMPORTANT NOTE: If some of the keys are not recorded, the information “NULL” will appear in replace the respective key on that line.  In this case, SEMP TCL support should be contacted for instructions on the recording.

USE TIME INFORMATION

In this model we can check the time of use of the product. Perform the same procedures to enter the Factory Menu, but instead of using the password 9735, enter the code 6425 to enter the Service Menu. In this Menu can be seen on the 9th line the operating time of the device:


Power board schematic diagram