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 !

Tuesday 26 February 2019

SAMSUNG HLP SERIES PROJECTION TVS DARK SPOTS IN PICTURE

SAMSUNG HLP SERIES PROJECTION TVs DARK SPOTS IN PICTURE




                               DARK SPOTS IN PICTURE [SAMSUNG] 
(HLP4663WX/5063WX/5085WX/5663WX/5685WX/6163WX [L62B L3 7 L7 CHASSIS)
This is caused by the bending movement of Lenti Screen partly due to changing temperature and metamorphosis of Fresnel screen.  The pointed ridges in the pattern of the Fresnel screen become distorted and cause this.  The effect is more noticeable on a lighter background.  Replace the screen assembly is the only repair work to this.
PROPER SCREEN SIZE
  • 46"SCREEN ASSEMBLY => BP91-01810A
  • 50" SCREEN ASSEMBLY => BP91-0811A
  • 56" SCREEN ASSEMBLY => BP91-01812A
  • 61" SCREEN ASSEMBLY => BP91-01813A
Two disassembly procedures are:
For L3 Chassis = Standard tabletop model
For L7 Chassis = Pedestal model.
L3 CHASSIS => TABLETOP MODEL
  1. Remove the speaker grill by unsnapping it from the bottom corner working around perimeter.
  2. The screen assembly frame and speaker grill are of the "Snap-on" type, and no screws are there to fix.  Unsnap the frame around the perimeter of the screen.
  3. Remove 6 screws from the top, right and left screen brackets. The bottom screen bracket does not need to be removed and serves  as an anchor during screen disassembly. 
  4.  Remove the side screen bracket by sliding the bracket UP, then lifting it off.  The other brackets are attached in the same fashion.
  5. Carefully remove the Lenticular and Fresnel by lifting them up, out of the bottom support bracket.
  6. The parts kit comes assembled.  Carefully install, so that the Lenticular (Dark side) screen side is facing the front of the set.  
L7 CHASSIS => PEDESTAL MODELS
  1. Remove 11 screws from the rear cabinet assembly.
  2. Insert thin screw driver into the top-left corner vacant screw hole and apply gentle pressure until the mask and screen seperate from the rear cabinet assembly.
  3. Unsnap and lift the Mask and screen out.
  4. Remove the 9 screws holding the screen brackets from the mask, and carefully lift out the Screen assembly.
  5. The part kit comes assembled.  Carefully install, so that the lenticular Dark Side is facing the front of the set
Posted By: FRANK at 03:50
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