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!

©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 !

Thursday, 28 March 2019

HOW TO REPLACE THE TOUCH SENSOR KEY PWB TO LCD TVS

HOW TO REPLACE THE TOUCH SENSOR KEY PWB TO LCD TVs

The example shown here is of Sharp LCD LC-46/60LE925E.  The procedure to replace the touch sensor is similar to most of other brand LCD TVs.
How to replace the Touch Sensor key PWB
Replace the touch sensor key PWB in a clean room.  Be sure to remove the dust from the unit before carrying it into the clean room.
Remove the touch sensor key PWB from the front glass.
Clean the bonding surface with alcohol. Depending on the dirt, water solution of 80%vol can be effective.
Product Manual Touch Sensor Key with ITO (Transparent Electrode).
When peeling the ITO section, check that there is no glue residue on the front glass.  If glue residue, dirt, fingerprints, etc. are found, wipe them off with anhydrous alcohol.  Do not apply anhydrous alcohol to the double-sided tape on the metal part attaching to the glass.
Adhere the ITO section to the front glass. (Use the positioning jig.)  Tape fixing the FPCB and ITO sections (Adhered by the supplier)
Peel the release paper of the double-sided tape on the ITO section.
Slowly adhere it from the end using a roller.  (Position the touch sensor using the jig.)
Check that there are no bubbles in the ITO section after adhered.  Adhering error: +/-(1.0)mm.
Adhere the FPCB section to the front glass.
Lift the FPCB section to peel the release paper of the double-sided tape.  Be careful not to apply stress to the joint of FPCB and ITO.
Adhere the FPCB section to the front glass.  Be careful not to apply stress to the joint of FPCB and ITO.
Peel the tape fixing the FPCB and ITO sections.
Attach the touch unit bonding procedure.
It includes peeling of the protective sheet.
How to mount the touch sensor
Adhere after positioned using the positioning jig.
Peel the protective sheet by means of the pull tap for peeling the protective sheet.
Adhere the FPCB to the glass. (Do not warp the FPCB if possible.)
Pull tap for peeling the protective sheet of the double-sided tape in the FPCB section.
Peel the protective sheet of the OCA.
Lift the ITO section, then peel the protective sheet by about half by means of the pull tap.
Peeling it completely reduces workability.
Check the order due to workability
Contact the FPCB and joint end of the transparent electrode film with the glass.
Grasp the opposite end. Note that the ITO is positioned by adhering.
Do not bend the PWB (FPCB section) and sheet (ITO section).
Adhere the transparent electrode completely.
Peel the front protective sheet.
If bubbles are found, press those portions with glass cleaning cloth, etc. to remove them as much as possible.
Use a rubber roller since pressure exerted by it removes bubbles easily.
Posted By: FRANK at 04:52
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