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 !

Sunday, 22 December 2019

REPAIRING / SERVICING TV SAMSUNG LE26R51B

Technical description and composition of the SAMSUNG LE26R51B TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE26R51B LE26R51BM
Chassis / Version: RE26EO
Panel: LTA260W2-L11
T-CON: 260W2C4LV1.0 // 260W2C4LV1.6
Inverter (backlight): SIT260W2D8UB02 HU26024W2C
PWM Inverter: BD9884FV
MOSFET Inverter: SP8M3
Power Supply (PSU): BN96-02583A
PWM Power: F9222L, VIPer12
MOSFET Power: W20NM6
MainBoard: BN41-00661A BN94-00824A // BN41-00545D
IC MainBoard: MST3385M-LF-110, STV8257DSX, STA323W
Tuner: BN40-00051A
Specifications LE26R51B
SAMSUNG LE26R51B
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LE26R51B TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
In some of these cases, a fault is detected in the BN96-02583A power supply module. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of power switches (W20NM6) of converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers F9222L, VIPer12, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter for the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-00661A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements MST3385M-LF-110, STV8257DSX, STA323W requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Malfunction of the tuner BN40-00051A is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention to users! Self-repair of a SAMSUNG LE26R51B TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!


 The appearance of the MainBoard BN41-00661A is shown in the figure below:
BN41-00661A
The appearance of the power supply
BN96-02583A:
BN96-02583A
Main features of the SAMSUNG LE26R51B device:
Installed matrix (LCD-panel) LTA260W2-L11.
The matrix control uses the Timing Controller (T-CON) 260W2C4LV1.0.
To power the backlight, an inverter SIT260W2D8UB02 is used, it is controlled by the BD9884FV PWM controller. As power elements of the inverter, keys of the type SP8M3 are used.




The necessary supply voltages for all nodes of the SAMSUNG LE26R51B TV are generated by the BN96-02583A power module or its analogs using F9222L, VIPer12 microcircuits and W20NM6 type power switches.
MainBoard - the main board (motherboard) is a BN41-00661A module, using microchips MST3385M-LF-110, STV8257DSX, STA323W and others.
The tuner BN40-00051A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA260W2-L11
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Display Colors: 16.7M (8-bit)
Frequency: 60Hz
Lamp Type: CCFL

Posted By: FRANK at 06:26
TAG: , , ,