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, 30 January 2019

SAMSUNG LN32D403E2G, LN26D450 LED LCD TV

BN44 00438A, BN44 00468A – SMPS schematic – Samsung LN32D403E2G, LN26D450 LED LCD TV


Samsung LE32D400E1W, Samsung LN26D450G1DXZA, Samsung LN32D450G1DXZA LED LCD TV power board circuit diagram: Used ICs - SEM3040, STRW6052S, SEM2106 
Attaching SMDs
 When soldering the SMD terminals, do not touch them directly with the soldering iron. The soldering should be done as quickly as possible; care must be taken to avoid damage to the terminals of the SMDs themselves.
* Keep the SMD's body in contact with the printed board when soldering.
* The soldering iron to be used (approx. 30 W ) should preferably be equipped with a thermal control (soldering temperature: 225 to 250 C).
* Soldering should not be done outside the solder land.
* Soldering flux (of rosin) may be used, but should not be acidic.
* After soldering, let the SMD cool down gradually at room temperature.
* The quantity of solder must be proportional to the size of the solder land. If the quantity is too great, the SMD might crack or the solder lands might be torn loose from the printed board.
Removal of SMDs
* Heat the solder (for 2-3 seconds) at each terminal of the chip. By means of litz wire and a slight horizontal force, small components can be removed with the soldering iron.
They can also be removed with a solder sucker
* While holding the SMD with a pair of tweezers, take it off gently using the soldering iron's heat applied to each terminal..
* Remove the excess solder on the solder lands by means of litz wire or a solder sucker..
While holding the SMD with a pair of tweezers, take it off gently using the soldering iron's heat applied to each terminal..
* Remove the excess solder on the solder lands by means of litz wire or a solder sucker
LN32D400, LN26D450 Power board [SMPS] and schematic

Click on the schematic to magnify
Posted By: FRANK at 04:33