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.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Friday, 5 April 2019

LG 42LH50 HOW TO REMOVE T-CON BOARD - LG42LH50 - EEFL - LCD TV


HOW TO REMOVE T-CON BOARD - LG42LH50 - EEFL - LCD TV


T-CON [LCD CONTROLLER BOARD] REMOVAL
The T-Con IC UC1 receives from the Main Board at CN1 12 Bit and CN2 12 Bit LVDS Signals (Video) which it processes into TFT Drive Signals. It delivers its output signals through connectors CN4 and CN5 to control the LCD Panel.  12V is supplied to the T-Con Board on connector CN1 from the Main Board (easily measured at fuse F1).
Diode LD1 is a boot up indicator and is helpful in troubleshooting as a quick indication of a loss of supply and or a Boot up problem. The main purpose of LD1 is to aid in the firing of the EEFL back-lights when room light is minimum.It helps to excite the selenium in the EEFL lamp which is highly sensitive to Blue light. Once this lamp fires, it helps to excite the others.
There is one regulator that creates 1.19V developed at pin 2 (Center Leg) of U11. U5 is a DC to DC converter IC which develops the Panels driver voltages. 16V, 3.3V, -5V and 26V.  These voltages can be read at the ribbon connector or attest points on the board.
CLICK ON THE PICTURES TO MAGNIFY 
Remove the 3 Screws in the T-CON shield and remove the shield.
The two screws shown in the picture below are for the Service Position.
They would have been removed when removing the shield.
Be sure to re-install them if servicing the T-CON PWB.
The two screws shown in the picture below are for the Service Position.  They would have been removed when removing the shield.  Be sure to re-install them if servicing the T-CON PWB.
Disconnect CN1, CN2, CN4 and CN5.
To remove the LVDS cables CN1 and CN2;
Press in on the two tabs and slowly rock the cable out of the connector. (Shown by the arrows in Figure).
To remove the flex cables to the TFT Panel, CN4 or CN5, place a soft thin object like a fingernail underneath the black locking tab and gently pull forward.
Flip the lock up and back from the flex cable.   Then the flex cable can be easily removed.
Posted By: FRANK at 02:25
TAG: , , ,