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.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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 15 October 2020

LGP42-09LF, LGP42-09LH LCD TV - EAY57681301(FHD), EAY57681302(HD) POWER BOARD SCHEMATIC DIAGRAM USING STR W6252, ICE2PCS06G, 2SK3797


General Description


The STR-W6200D series are power ICs for switching power supplies, incorporating a power MOSFET and a current mode PWM controller IC in one package. Includ- ing a startup circuit and a standby function in the controller, the product achieves low power consumption, low standby power, and high cost-effectiveness in power supply systems, while reducing external components.
Features and Benefits
▪ TO-220 fully-molded package with 6 pins
▪ Current mode PWM control
▪ PWM and frequency modulation functions: reduces EMI
noise, simplifies EMI filters, and cuts cost by external part
reduction
▪ Built-in Slope Compensation circuit: avoids subharmonic
oscillation
▪ Automatic Standby Mode function (Input Power < 40
mW at no load)
▫ Normal operation: PWM mode
▫ Light load operation: Standby mode (burst oscillation)
▪ Built-in Audible Noise Suppression function during
Standby mode
▪ Built-in startup circuit: reduces power consumption in
standby operation, and eliminates external components
▪ Bias-Assist function: improves startup operation,
suppresses VCC pin voltage drop in operation, and allows
use of smaller VCC capacitor
▪ Built-in Leading Edge Blanking function
▪ Protection Functions:
▫ Overcurrent Protection function (OCP); pulse-by-pulse,
built-in compensation circuit to minimize OCP point
variation on AC input voltage
▫ Overload Protection function (OLP); auto restart, built-in
timer, reduces heat during overload condition, and few
external components required
▫ External Latch Protection function (ELP): latched
shutdown by external signal
▫ Overvoltage Protection function (OVP): latched
shutdown
▫ Thermal Shutdown function (TSD); latched shutdown

 

Electrical characteristics

Intermittent Operation stability test:  The switching regulator shall ON-OFF for 20,000 time at an interval of 10 sec at maximum load, after that electrical characteristics shall be satisfied.

Low temperature operation:  The switching regulator is left at the operating guarantee minimum temperature for 2 hours without applying electricity.  After that power shall be turned on, and then the electrical characteristics shall be satisfied.

Low temperature Storage test Leave at low temperature:  The switching regulator is left at minimum storage temperature for 96 hours or more.  Then the switching regulator is left at a room temperature and humidity for 1hour or more, after that electrical characteristics shall be satisfied.

Schematic


Connector voltages

Bottom and top view



 

Posted By: FRANK at 06:17
TAG: , , , ,