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 !

Monday, 17 August 2020

REPAIRING / SERVICING LTF400HM03 LCD PANEL FAULTS

The explanations below are only for the LTF400HM03 coded panel. It does not work for different panels.


 PROBLEM ------ > After a while, the picture flickers and starts showing double frames:





 In order to determine which side of the panel the problem originated from, first remove the left film that connects the t-con card to the panel from both the t-con and the panel and run the TV. If the image displayed on the screen is correct, the right side of the panel is defective. If the image is the same, attach the left film to both the t-con card and the panel, and this time remove the right film. If the image improves, the problem is with the left side of the panel.


  


Remove the RM1, RM2, RM3, RM4, RM5, RM6 and RM7 resistors on the panel board to fix the problem on the right. If the image did not improve in this state, replace the resistors you removed one by one and check the image again each time. If a problem occurs when you wire a series of resistors, leave that series idle. Remember to replace all resistors except the series causing the problem.
You need to use the same method to fix the problem on the left.



 

 Although the flickering problem has been eliminated, if there are horizontal lines on the screen, you should make the changes in the picture.



 
Posted By: FRANK at 07:11
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