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

46 INCH LCD TV SMPS SCHEMATIC

46 INCH LCD TV SMPS SCHEMATIC

Power Supply Circuit Diagram - 46 inch LCD TV
PFC SECTION CIRCUIT
Up to 300 W Interleaved Frequency Clamp CrM PFC
> Better EMI and EMC
> Lower Irms for output C
> Better for SLIM design
> Standard parts (= 32”CrM)
BACK-LIGHT INVERTER (FLYBACK SECTION)
Flyback converter
> Up to 70 W max
> Up to 3 output with 4 A Max
Quasi Resonance Flyback Converter
> Reduced EMI
> Best safety behaviors
New NCP1379 controller
> Valley-lockout system
> Variable frequency mode for ultra low power mode
> Over current protection with auto recovery internal timer
PWM Fixed Frequency Flyback converter
> 50 kHz Fixed frequency
> Allow natural CCM
New NCP1252 controller
> Adjustable switching frequency with skip mode
> Adjustable soft start
> Over current protection with internal timer
QR Valley lock-out or PWM Flyback SMPS up to 70 W
STANDBY CIRCUIT
Dedicated 5W ECO Power Standby SMPS
> P in < 90 mW for Pout = 40 mW @ 230 Vac
> Integrated High Voltage switcher NCP1053A (400 mA / 40 kHz Max)
Hysteretic mode improves
Low frequency mode allows DCM
Limited current reduces possible noise issues.
Hysteretic, Low Freq & DCM for ECO Standby SMPS
CLICK ON THE SCHEMATICS TO ZOOM IN
Posted By: FRANK at 02:31
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