REPAIRING AND NOT THROWING AWAY

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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Tuesday 29 September 2020

TCL 43A8000 LCD TV – HOW TO UPGRADE THE USB, USB KEY UPDATE, MENU UPGRADE, SMPS BOARD SCHEMATIC DIAGRAMS, TROUBLESHOOTING AND DIAGNOSIS



USB Upgrade


1. Rename the upgrade file V8-T841T01-LF1V021.img into install.img
2. Put bin file to the root of the Udisk, and plug in TV set through USB.
3. AC disconnect.
4. AC connect and long press OK button on panel, wait 10 Seconds and you see upgrade process is shown on the screen.

MENU Upgrade
1. Rename the upgrade file V8-T841T01-LF1V021.img into install.img
2. Put bin file to the root of the Udisk, and plug in TV set through USB.
3. Go to factory menu
a) Press settings button under HDMI source
b) Picture & Display->Picture Adjustment-> Advanced Settings->Brightness->Contrast
c) press “1950” on Contrast
d) other->USB Update
4. Press Main update, it will power off and upgrade in 10 Seconds you will see the upgrade process shown on the screen.

USB key Update
1. Put the Key file as below to the USB root directory, and connect to TV, it will update the TV Key.

2. After update the keys, it will display “OK” on screen
3. Done.



SMPS (Power supply board) schematic


Trouble shooting

No power LED, RC or Key cannot turn on TV. Power LED no light - no change.


Back light is OK, sound is OK, but no picture.


Power LED logic OK, sound OK, but no picture (Different from No Display).


One or All signal source without sound.


One or several source no function.

Abnormal Display.  OSD NG or picture NG.


No tuning channels.  DTV or ATV no Channels.

P mode on and burning mode

 

Posted By: FRANK at 09:11