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 !

Wednesday, 27 March 2019

LG PJ350 PLASMA _ LEFT & RIGHT X-DRIVE CONNECTOR REMOVAL

LG PJ350 PLASMA _ LEFT & RIGHT X-DRIVE CONNECTOR REMOVAL




TO REMOVE CONNECTORS ON X-BOARDS
From the X-Boards to the Control Board.
There may be tape on these connectors.


  • Remove tape (if present) and Gently pry the locking mechanism upward and remove the ribbon cable from the connector.  P232, P331 are the same.
  • Va from the Y-SUS to Left X Only.  Disconnect connector P233.
Connectors from Left and Right X Boards.  P211 to P311 Left X to Right X.  P211, P311 Are the same.
  • Carefully lift the TCP ribbon up and off. It may stick, be careful not to crack TCP.  Remove Connectors to the TCPs.  Gently lift the locking mechanism upward on all TCP connectors.  
  • Left X: P201~206 Right X: P301~306.
FLEXIBLE RIBBON CABLE CONNECTOR


TCP [Tape Carrier Package] GENERIC REMOVAL PRECAUTIONS
  • Lift up the lock as shown using your fingernail. (The Lock can be easily broken. It needs to be handled carefully.)
  • The TCP has two small tabs on each side, which lock the ribbon cable fully into the connector.
  • They have to be lifted up slightly to pull the connector out.
  • Note: TCP is usually stuck down to the Chocolate heat transfer material, be Very Careful when lifting up on the TCP ribbon cable.
  • Separate the TCP from the connector. TCP Film can be easily damaged. Handle with care.
LEFT & RIGHT X DRIVE REMOVAL
  • Remove the 4 screws in Left or Right X-Boards, (9 Total).
  • The Left X Board drives the Right 5/16 of the side of the screen vertical electrodes 
  • The Center X Board drives the Center 3/8 of the of the screen vertical electrodes
  • The Right X Board drives the Left 5/16 of the side of the screen vertical electrodes.

Troubleshooting Tips

  • Look at the symptom carefully and determine what circuits could be causing the failure. Use your senses Sight, Smell, Touch and Hearing. Look for burned parts and check for possible overheated components. Capacitors will sometimes leak dielectric material and give off a distinct odor. Frequency of power supplies will change with the load, or listen for relay closing etc. Observation of the front Power LEDs may give some clues.
  • After carefully checking the symptom and determining the circuits to be checked and after giving a thorough examination using your senses the first check should always be the DC Supply Voltages to those circuits under test. Always confirm the supplies are not only the proper level but be sure they are noise free. If the supplies are missing check the resistance for possible short circuits.
  • To further isolate the failure, check for the proper waveforms with the Oscilloscope to make a final determination of the failure. Look for correct Amplitude Phasing and Timing of the signals also check for the proper Duty Cycle of the signals. Sometimes “glitches” or “road bumps” will be an indication of an imminent failure.
  • The final step is to correct the problem. Be careful of ESD and make sure to check the DC Supplies for proper levels. Make all necessary adjustments and lastly always perform a Safety AC Leakage Test
Posted By: FRANK at 02:22
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