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, 12 February 2019

TOSHIBA - 46HM84_46HMX84_52HM84_52HMX84_ 62HM84_62HMS84_ SUB POWER SUPPLY DISASSEMBLY



TOSHIBA - 46HM84_46HMX84_52HM84_52HMX84_ 62HM84_62HMS84_ SUB POWER SUPPLY DISASSEMBLY


Disassambly or Toshiba DLP model 52HM94 is similar to that of model 52HM84, with exceptions regarding removal of the Digital [Scine_DSB_SHU153U] and sub power supply modules.  
H94 CHASSIS TYPE.


H84 CHASSIS TYPE



  • After the back has been removed and front panel pulled straight off, detach connectors PC01, PB91 and PV60 from the keyboard, front AV input and memory card PC boards.  Detaching these connectors simplifies removal of the chassis ass'y, as the opposite ends of keyboard and card reader cables are connected at the under side of the Digital module and are difficult to remove with the module in place.

  • Pull the cables and attracted ferrite core removed from the front control panel through the hole in the front cabinet. 

LIGHT ENGINE DISCONNECTION
  • Disconnecting and moving the light engine allows access easy.  Once completed, the light engine and chassis block can be removed from the cabinet as individual sections.
  • After the chassis has been removed away from the light engine to gain access to the front of the chassis, remove the cable tie securing the ballast power and thermal circuit breaker wires to the locking clip.  Detach the connectors from the main power baord.
  • Disconnect Lamp exhaust fan, DMD fan and door switch from the main power board.
  • Remove speaker and IR blaster wires from the retaining clip on the right shield above the light engine projection lens.
  • Disconnect CN101[red], CN102[blue] and CN103[yellow] from the DMD PC board.
  • Disconnect the LVDS cable from digital module by gently squeezing the connector clamps, and disconnect the cable.  Verify that the positioning of copper tape does not bet itself to short circuiting the connector pins.  Verify this point again during re-assembly process.
  • Remove all cables from the clamps on the front brace.  The cables  to attached to the front panel are were removed earlier. Cut the two cable ties securing the power supply cables to the brace.  Remove the large, self tapping screw securing the cross section to the front brace.
  • Remove 4 large screws securing the front brace to the left and right sides of the chassis.

  • Remove 1 medium pan head self tapping screw and 1 large self tapping screw securing the Digital module to the chassis.
  • Remove 2 small machine screws and one small self tapping screw from the rear A/V connector.
  • Remove; but do not discard; the aluminium tape securing the RF Switching Module coaxial cables to the top of the digital module. 
  • Disconnect 2 coaxial cables from the RF switching module.  The cables connect to the ATSC tuner inside the digital module.
  • Disconnect main power and AV board ribbon cables, sub power cables, main power cable, memory card cable and IR blaster cable.






Posted By: FRANK at 04:03
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